re PR libfortran/19872 ([4.0 only] closed and re-opened file not overwriten)

	* lib/lib/target-supports.exp (check_effective_target_fd_truncate):
	New.
	* gfortran.fortran-torture/execute/list_read_1.x,
	gfortran.fortran-torture/execute/read_null_string.x,
	gfortran.fortran-torture/execute/backspace.x,
	gfortran.fortran-torture/execute/seq_io.x,
	gfortran.fortran-torture/execute/slash_edit.x,
	gfortran.fortran-torture/execute/unopened_unit_1.x,
	gfortran.dg/namelist_21.f90, gfortran.dg/advance_5.f90,
	gfortran.dg/fmt_t_7.f, gfortran.dg/eor_1.f90, 
	gfortran.dg/read_x_past.f, gfortran.dg/tl_editing.f90,
	gfortran.dg/ftell_2.f90, gfortran.dg/namelist_13.f90,
	gfortran.dg/namelist_22.f90, gfortran.dg/advance_6.f90,
	gfortran.dg/read_bad_advance.f90, gfortran.dg/func_derived_3.f90,
	gfortran.dg/namelist_40.f90, gfortran.dg/x_slash_2.f,
	gfortran.dg/namelist_14.f90, gfortran.dg/backspace_1.f,
	gfortran.dg/namelist_23.f90, gfortran.dg/pr17285.f90,
	gfortran.dg/read_noadvance.f90, gfortran.dg/namelist_use_only.f90,
	gfortran.dg/namelist_41.f90, gfortran.dg/namelist_15.f90,
	gfortran.dg/backspace_3.f, gfortran.dg/backslash_3.f,
	gfortran.dg/namelist_24.f90, gfortran.dg/pr17286.f90,
	gfortran.dg/endfile.f90, gfortran.dg/open_access_append_1.f90,
	gfortran.dg/fmt_huge.f90, gfortran.dg/namelist_42.f90,
	gfortran.dg/pr18392.f90, gfortran.dg/pr19155.f, gfortran.dg/pr12884.f,
	gfortran.dg/namelist_16.f90, gfortran.dg/backspace_5.f,
	gfortran.dg/open_readonly_1.f90, gfortran.dg/fmt_read.f90,
	gfortran.dg/iostat_1.f90, gfortran.dg/namelist_43.f90,
	gfortran.dg/read_size_noadvance.f90, gfortran.dg/inquire_5.f90,
	gfortran.dg/read_many_1.f, gfortran.dg/namelist_17.f90,
	gfortran.dg/list_read_1.f90, gfortran.dg/backspace_10.f90,
	gfortran.dg/namelist_26.f90, gfortran.dg/unf_read_corrupted_2.f90,
	gfortran.dg/record_marker_1.f90, gfortran.dg/convert_implied_open.f90,
	gfortran.dg/iostat_2.f90, gfortran.dg/write_check3.f90,
	gfortran.dg/namelist_44.f90, gfortran.dg/namelist_use.f90,
	gfortran.dg/rewind_1.f90, gfortran.dg/streamio_11.f90,
	gfortran.dg/namelist_18.f90, gfortran.dg/backspace_9.f,
	gfortran.dg/dos_eol.f, gfortran.dg/read_eof_1.f90,
	gfortran.dg/namelist_27.f90, gfortran.dg/pad_no.f90,
	gfortran.dg/endfile.f, gfortran.dg/namelist_11.f,
	gfortran.dg/namelist_19.f90, gfortran.dg/eor_handling_1.f90,
	gfortran.dg/write_rewind_1.f, gfortran.dg/comma.f,
	gfortran.dg/read_eof_2.f90, gfortran.dg/namelist_28.f90,
	gfortran.dg/record_marker_3.f90, gfortran.dg/complex_read.f90,
	gfortran.dg/namelist_37.f90, gfortran.dg/error_recovery_5.f90,
	gfortran.dg/namelist_char_only.f90, gfortran.dg/pr18122.f90,
	gfortran.dg/list_read_4.f90, gfortran.dg/eor_handling_2.f90,
	gfortran.dg/read_eof_3.f90, gfortran.dg/dollar_edit_descriptor_1.f,
	gfortran.dg/pr19467.f90, gfortran.dg/namelist_38.f90,
	gfortran.dg/inquire_9.f90, gfortran.dg/list_read_5.f90,
	gfortran.dg/noadv_size.f90, gfortran.dg/backslash_1.f90,
	gfortran.dg/eor_handling_3.f90, gfortran.dg/read_eof_4.f90,
	gfortran.dg/runtime_warning_1.f90, gfortran.dg/x_slash_1.f,
	gfortran.dg/namelist_39.f90, gfortran.dg/streamio_3.f90,
	gfortran.dg/read_comma.f, gfortran.dg/pr19657.f,
	gfortran.dg/streamio_15.f90, gfortran.dg/list_read_6.f90,
	gfortran.dg/eor_handling_4.f90, gfortran.dg/backslash_2.f90,
	gfortran.dg/pr19216.f, gfortran.dg/PR19872.f,
	gfortran.dg/backspace_2.f, gfortran.dg/empty_format_1.f90,
	gfortran.dg/streamio_4.f90, gfortran.dg/append_1.f90,
	gfortran.dg/fgetc_1.f90, gfortran.dg/complex_write.f90,
	gfortran.dg/list_read_7.f90, gfortran.dg/eor_handling_5.f90,
	gfortran.dg/fmt_t_1.f90, gfortran.dg/pr17090.f90,
	gfortran.dg/backspace_4.f, gfortran.dg/shape_3.f90,
	gfortran.dg/unf_io_convert_1.f90, gfortran.dg/fgetc_2.f90,
	gfortran.dg/vector_subscript_3.f90, gfortran.dg/list_read_8.f90,
	gfortran.dg/flush_1.f90, gfortran.dg/advance_1.f90,
	gfortran.dg/fmt_t_2.f90, gfortran.dg/backspace_6.f,
	gfortran.dg/slash_1.f90, gfortran.dg/stat_1.f90,
	gfortran.dg/unformatted_recl_1.f90, gfortran.dg/record_marker_2.f,
	gfortran.dg/overwrite_1.f, gfortran.dg/unf_io_convert_2.f90,
	gfortran.dg/fmt_t_3.f90, gfortran.dg/backspace_8.f,
	gfortran.dg/stat_2.f90, gfortran.dg/pr18210.f90,
	gfortran.dg/unformatted_subrecord_1.f90, gfortran.dg/pr20257.f90,
	gfortran.dg/eof_1.f90, gfortran.dg/fmt_t_4.f90,
	gfortran.dg/unf_short_record_1.f90, gfortran.dg/fmt_exhaust.f90,
	gfortran.dg/namelist_20.f90, gfortran.dg/advance_4.f90,
	gfortran.dg/fmt_t_5.f90, gfortran.dg/namelist_12.f,
	gfortran.dg/backspace_7.f90, gfortran.dg/write_rewind_2.f,
	gfortran.dg/ftell_1.f90, gfortran.dg/fseek.f90,
	gfortran.dg/write_back.f: Gate test on effective_target
	fd_truncate.

From-SVN: r132885

152 files changed, 310 insertions, 145 deletions

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 27064e2..5a28806 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,87 @@
+2008-03-05  Hans-Peter Nilsson  <hp@axis.com>
+
+	* lib/lib/target-supports.exp (check_effective_target_fd_truncate):
+	New.
+	* gfortran.fortran-torture/execute/list_read_1.x,
+	gfortran.fortran-torture/execute/read_null_string.x,
+	gfortran.fortran-torture/execute/backspace.x,
+	gfortran.fortran-torture/execute/seq_io.x,
+	gfortran.fortran-torture/execute/slash_edit.x,
+	gfortran.fortran-torture/execute/unopened_unit_1.x,
+	gfortran.dg/namelist_21.f90, gfortran.dg/advance_5.f90,
+	gfortran.dg/fmt_t_7.f, gfortran.dg/eor_1.f90, 
+	gfortran.dg/read_x_past.f, gfortran.dg/tl_editing.f90,
+	gfortran.dg/ftell_2.f90, gfortran.dg/namelist_13.f90,
+	gfortran.dg/namelist_22.f90, gfortran.dg/advance_6.f90,
+	gfortran.dg/read_bad_advance.f90, gfortran.dg/func_derived_3.f90,
+	gfortran.dg/namelist_40.f90, gfortran.dg/x_slash_2.f,
+	gfortran.dg/namelist_14.f90, gfortran.dg/backspace_1.f,
+	gfortran.dg/namelist_23.f90, gfortran.dg/pr17285.f90,
+	gfortran.dg/read_noadvance.f90, gfortran.dg/namelist_use_only.f90,
+	gfortran.dg/namelist_41.f90, gfortran.dg/namelist_15.f90,
+	gfortran.dg/backspace_3.f, gfortran.dg/backslash_3.f,
+	gfortran.dg/namelist_24.f90, gfortran.dg/pr17286.f90,
+	gfortran.dg/endfile.f90, gfortran.dg/open_access_append_1.f90,
+	gfortran.dg/fmt_huge.f90, gfortran.dg/namelist_42.f90,
+	gfortran.dg/pr18392.f90, gfortran.dg/pr19155.f, gfortran.dg/pr12884.f,
+	gfortran.dg/namelist_16.f90, gfortran.dg/backspace_5.f,
+	gfortran.dg/open_readonly_1.f90, gfortran.dg/fmt_read.f90,
+	gfortran.dg/iostat_1.f90, gfortran.dg/namelist_43.f90,
+	gfortran.dg/read_size_noadvance.f90, gfortran.dg/inquire_5.f90,
+	gfortran.dg/read_many_1.f, gfortran.dg/namelist_17.f90,
+	gfortran.dg/list_read_1.f90, gfortran.dg/backspace_10.f90,
+	gfortran.dg/namelist_26.f90, gfortran.dg/unf_read_corrupted_2.f90,
+	gfortran.dg/record_marker_1.f90, gfortran.dg/convert_implied_open.f90,
+	gfortran.dg/iostat_2.f90, gfortran.dg/write_check3.f90,
+	gfortran.dg/namelist_44.f90, gfortran.dg/namelist_use.f90,
+	gfortran.dg/rewind_1.f90, gfortran.dg/streamio_11.f90,
+	gfortran.dg/namelist_18.f90, gfortran.dg/backspace_9.f,
+	gfortran.dg/dos_eol.f, gfortran.dg/read_eof_1.f90,
+	gfortran.dg/namelist_27.f90, gfortran.dg/pad_no.f90,
+	gfortran.dg/endfile.f, gfortran.dg/namelist_11.f,
+	gfortran.dg/namelist_19.f90, gfortran.dg/eor_handling_1.f90,
+	gfortran.dg/write_rewind_1.f, gfortran.dg/comma.f,
+	gfortran.dg/read_eof_2.f90, gfortran.dg/namelist_28.f90,
+	gfortran.dg/record_marker_3.f90, gfortran.dg/complex_read.f90,
+	gfortran.dg/namelist_37.f90, gfortran.dg/error_recovery_5.f90,
+	gfortran.dg/namelist_char_only.f90, gfortran.dg/pr18122.f90,
+	gfortran.dg/list_read_4.f90, gfortran.dg/eor_handling_2.f90,
+	gfortran.dg/read_eof_3.f90, gfortran.dg/dollar_edit_descriptor_1.f,
+	gfortran.dg/pr19467.f90, gfortran.dg/namelist_38.f90,
+	gfortran.dg/inquire_9.f90, gfortran.dg/list_read_5.f90,
+	gfortran.dg/noadv_size.f90, gfortran.dg/backslash_1.f90,
+	gfortran.dg/eor_handling_3.f90, gfortran.dg/read_eof_4.f90,
+	gfortran.dg/runtime_warning_1.f90, gfortran.dg/x_slash_1.f,
+	gfortran.dg/namelist_39.f90, gfortran.dg/streamio_3.f90,
+	gfortran.dg/read_comma.f, gfortran.dg/pr19657.f,
+	gfortran.dg/streamio_15.f90, gfortran.dg/list_read_6.f90,
+	gfortran.dg/eor_handling_4.f90, gfortran.dg/backslash_2.f90,
+	gfortran.dg/pr19216.f, gfortran.dg/PR19872.f,
+	gfortran.dg/backspace_2.f, gfortran.dg/empty_format_1.f90,
+	gfortran.dg/streamio_4.f90, gfortran.dg/append_1.f90,
+	gfortran.dg/fgetc_1.f90, gfortran.dg/complex_write.f90,
+	gfortran.dg/list_read_7.f90, gfortran.dg/eor_handling_5.f90,
+	gfortran.dg/fmt_t_1.f90, gfortran.dg/pr17090.f90,
+	gfortran.dg/backspace_4.f, gfortran.dg/shape_3.f90,
+	gfortran.dg/unf_io_convert_1.f90, gfortran.dg/fgetc_2.f90,
+	gfortran.dg/vector_subscript_3.f90, gfortran.dg/list_read_8.f90,
+	gfortran.dg/flush_1.f90, gfortran.dg/advance_1.f90,
+	gfortran.dg/fmt_t_2.f90, gfortran.dg/backspace_6.f,
+	gfortran.dg/slash_1.f90, gfortran.dg/stat_1.f90,
+	gfortran.dg/unformatted_recl_1.f90, gfortran.dg/record_marker_2.f,
+	gfortran.dg/overwrite_1.f, gfortran.dg/unf_io_convert_2.f90,
+	gfortran.dg/fmt_t_3.f90, gfortran.dg/backspace_8.f,
+	gfortran.dg/stat_2.f90, gfortran.dg/pr18210.f90,
+	gfortran.dg/unformatted_subrecord_1.f90, gfortran.dg/pr20257.f90,
+	gfortran.dg/eof_1.f90, gfortran.dg/fmt_t_4.f90,
+	gfortran.dg/unf_short_record_1.f90, gfortran.dg/fmt_exhaust.f90,
+	gfortran.dg/namelist_20.f90, gfortran.dg/advance_4.f90,
+	gfortran.dg/fmt_t_5.f90, gfortran.dg/namelist_12.f,
+	gfortran.dg/backspace_7.f90, gfortran.dg/write_rewind_2.f,
+	gfortran.dg/ftell_1.f90, gfortran.dg/fseek.f90,
+	gfortran.dg/write_back.f: Gate test on effective_target
+	fd_truncate.
+
 2008-03-04  Joseph Myers  <joseph@codesourcery.com>
 
 	* gcc.dg/tree-ssa/loop-1.c: Handle i?86-*-mingw* i?86-*-cygwin* as
diff --git a/gcc/testsuite/gfortran.dg/PR19872.f b/gcc/testsuite/gfortran.dg/PR19872.f
index 12bba33..edc743b 100644
--- a/gcc/testsuite/gfortran.dg/PR19872.f
+++ b/gcc/testsuite/gfortran.dg/PR19872.f
@@ -1,4 +1,4 @@
-! { dg-do run } 
+! { dg-do run { target fd_truncate } } 
 ! PR 19872 - closed and re-opened file not overwriten
       implicit none
       integer i(4)
diff --git a/gcc/testsuite/gfortran.dg/advance_1.f90 b/gcc/testsuite/gfortran.dg/advance_1.f90
index 9002c52..7e55e94 100644
--- a/gcc/testsuite/gfortran.dg/advance_1.f90
+++ b/gcc/testsuite/gfortran.dg/advance_1.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR25463 Check that advance='no' works correctly.
 ! Derived from example given in PR by Thomas Koenig
 ! Contributed by Jerry DeLisle  <jvdelisle@gcc.gnu.org> 
diff --git a/gcc/testsuite/gfortran.dg/advance_4.f90 b/gcc/testsuite/gfortran.dg/advance_4.f90
index ab22311..633f90a 100644
--- a/gcc/testsuite/gfortran.dg/advance_4.f90
+++ b/gcc/testsuite/gfortran.dg/advance_4.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR31207 Last record truncated for read after short write
 program main
   character(10) :: answer
@@ -7,4 +7,4 @@ program main
   read (12, '(6A)') answer
   close (12, status="delete")
   if (answer /= "XABCDX") call abort()
-end program main
\ No newline at end of file
+end program main
diff --git a/gcc/testsuite/gfortran.dg/advance_5.f90 b/gcc/testsuite/gfortran.dg/advance_5.f90
index 3a48e53..f906c72 100644
--- a/gcc/testsuite/gfortran.dg/advance_5.f90
+++ b/gcc/testsuite/gfortran.dg/advance_5.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR31207 Last record truncated for read after short write.
 character(len=20) :: b
 ! write something no advance
diff --git a/gcc/testsuite/gfortran.dg/advance_6.f90 b/gcc/testsuite/gfortran.dg/advance_6.f90
index f1967b0..1a42cca 100644
--- a/gcc/testsuite/gfortran.dg/advance_6.f90
+++ b/gcc/testsuite/gfortran.dg/advance_6.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR 34370 - file positioning after non-advancing I/O didn't add
 ! a record marker.
 
diff --git a/gcc/testsuite/gfortran.dg/append_1.f90 b/gcc/testsuite/gfortran.dg/append_1.f90
index 8b81bc3..e058914 100644
--- a/gcc/testsuite/gfortran.dg/append_1.f90
+++ b/gcc/testsuite/gfortran.dg/append_1.f90
@@ -1,7 +1,7 @@
 ! PR libfortran/21471
 ! Testing POSITION="APPEND"
 !
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
       subroutine failed
         close (10,status='delete')
         call abort
diff --git a/gcc/testsuite/gfortran.dg/backslash_1.f90 b/gcc/testsuite/gfortran.dg/backslash_1.f90
index b985134..ab7fc6f 100644
--- a/gcc/testsuite/gfortran.dg/backslash_1.f90
+++ b/gcc/testsuite/gfortran.dg/backslash_1.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
       character(len=4) a
       open (10, status='scratch')
       write (10,'(A)') '1\n2'
diff --git a/gcc/testsuite/gfortran.dg/backslash_2.f90 b/gcc/testsuite/gfortran.dg/backslash_2.f90
index 2f954d5..dc4714f 100644
--- a/gcc/testsuite/gfortran.dg/backslash_2.f90
+++ b/gcc/testsuite/gfortran.dg/backslash_2.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! { dg-options "-fbackslash" }
       integer :: i, e
       open (10, status='scratch')
diff --git a/gcc/testsuite/gfortran.dg/backslash_3.f b/gcc/testsuite/gfortran.dg/backslash_3.f
index 905d2b4..8625b37 100644
--- a/gcc/testsuite/gfortran.dg/backslash_3.f
+++ b/gcc/testsuite/gfortran.dg/backslash_3.f
@@ -1,4 +1,4 @@
-C { dg-do run }
+C { dg-do run { target fd_truncate } }
 C { dg-options "-fbackslash" }
 C PR fortran/30278
       program a
diff --git a/gcc/testsuite/gfortran.dg/backspace_1.f b/gcc/testsuite/gfortran.dg/backspace_1.f
index c3ec0c4..4cfc9c1 100644
--- a/gcc/testsuite/gfortran.dg/backspace_1.f
+++ b/gcc/testsuite/gfortran.dg/backspace_1.f
@@ -1,5 +1,5 @@
 ! This file is all about BACKSPACE
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 
       integer i, n, nr
       real x(10), y(10)
diff --git a/gcc/testsuite/gfortran.dg/backspace_10.f90 b/gcc/testsuite/gfortran.dg/backspace_10.f90
index 574d464..368a759 100644
--- a/gcc/testsuite/gfortran.dg/backspace_10.f90
+++ b/gcc/testsuite/gfortran.dg/backspace_10.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR33307 I/O read/positioning problem - in BACKSPACE
 ! Test case devloped from test in PR by Jerry DeLisle  <jvdelisle@gcc.gnu.org>
 program gfcbug69b
diff --git a/gcc/testsuite/gfortran.dg/backspace_2.f b/gcc/testsuite/gfortran.dg/backspace_2.f
index a8c55e7..3b63335 100644
--- a/gcc/testsuite/gfortran.dg/backspace_2.f
+++ b/gcc/testsuite/gfortran.dg/backspace_2.f
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR25139 Repeated backspaces and reads.
 ! Derived from example given in PR by Dale Ranta and FX Coudert
 ! Contributed by Jerry DeLisle  <jvdelisle@gcc.gnu.org> 
diff --git a/gcc/testsuite/gfortran.dg/backspace_3.f b/gcc/testsuite/gfortran.dg/backspace_3.f
index 419063b9..2006cd4 100644
--- a/gcc/testsuite/gfortran.dg/backspace_3.f
+++ b/gcc/testsuite/gfortran.dg/backspace_3.f
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR25598 Error on repeated backspaces.
 ! Derived from example given in PR by Dale Ranta
 ! Contributed by Jerry DeLisle  <jvdelisle@gcc.gnu.org> 
diff --git a/gcc/testsuite/gfortran.dg/backspace_4.f b/gcc/testsuite/gfortran.dg/backspace_4.f
index 69e0f40..6891c3c 100644
--- a/gcc/testsuite/gfortran.dg/backspace_4.f
+++ b/gcc/testsuite/gfortran.dg/backspace_4.f
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR25598 Error on repeated backspaces.
 ! Derived from example given in PR by Dale Ranta
 ! Contributed by Jerry DeLisle  <jvdelisle@gcc.gnu.org> 
diff --git a/gcc/testsuite/gfortran.dg/backspace_5.f b/gcc/testsuite/gfortran.dg/backspace_5.f
index 4cd657a..8ae3752 100644
--- a/gcc/testsuite/gfortran.dg/backspace_5.f
+++ b/gcc/testsuite/gfortran.dg/backspace_5.f
@@ -1,4 +1,4 @@
-!{ dg-do run }
+!{ dg-do run { target fd_truncate } }
 ! PR26464 File I/O error related to buffering and BACKSPACE
 ! Test case derived from case by Dale Ranta.
 ! Submitted  by Jerry DeLisle  <jvdelisle@gcc.gnu.org>
diff --git a/gcc/testsuite/gfortran.dg/backspace_6.f b/gcc/testsuite/gfortran.dg/backspace_6.f
index 4e594f0..90affdc 100644
--- a/gcc/testsuite/gfortran.dg/backspace_6.f
+++ b/gcc/testsuite/gfortran.dg/backspace_6.f
@@ -1,4 +1,4 @@
-!{ dg-do run }
+!{ dg-do run { target fd_truncate } }
 ! PR26464 File I/O error related to buffering and BACKSPACE
 ! Test case derived from case by Dale Ranta.
 ! Submitted  by Jerry DeLisle  <jvdelisle@gcc.gnu.org>
diff --git a/gcc/testsuite/gfortran.dg/backspace_7.f90 b/gcc/testsuite/gfortran.dg/backspace_7.f90
index 4f0b9e9..09cce73 100644
--- a/gcc/testsuite/gfortran.dg/backspace_7.f90
+++ b/gcc/testsuite/gfortran.dg/backspace_7.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 !pr18284 BACKSPACE broken
        open(unit=10,access='SEQUENTIAL',status='SCRATCH')
        do I = 1,200
diff --git a/gcc/testsuite/gfortran.dg/backspace_8.f b/gcc/testsuite/gfortran.dg/backspace_8.f
index 8c8c96a..c25dd5b 100644
--- a/gcc/testsuite/gfortran.dg/backspace_8.f
+++ b/gcc/testsuite/gfortran.dg/backspace_8.f
@@ -1,4 +1,4 @@
-C { dg-do run }
+C { dg-do run { target fd_truncate } }
 C PR libfortran/31618 - backspace after an error didn't work.
       program main
       character*78 msg
diff --git a/gcc/testsuite/gfortran.dg/backspace_9.f b/gcc/testsuite/gfortran.dg/backspace_9.f
index fe62ea5..01713b9 100644
--- a/gcc/testsuite/gfortran.dg/backspace_9.f
+++ b/gcc/testsuite/gfortran.dg/backspace_9.f
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR32235 incorrectly position text file after backspace
 ! Test case from PR, prepared by Jerry DeLisle  <jvdelisle@gcc.gnu.org>
       program main
diff --git a/gcc/testsuite/gfortran.dg/comma.f b/gcc/testsuite/gfortran.dg/comma.f
index b369bf4..08c4517 100644
--- a/gcc/testsuite/gfortran.dg/comma.f
+++ b/gcc/testsuite/gfortran.dg/comma.f
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR25419 Default input with commas.
 ! Derived from example given in PR.
 ! Contributed by Jerry DeLisle  <jvdelisle@gcc.gnu.org> 
diff --git a/gcc/testsuite/gfortran.dg/complex_read.f90 b/gcc/testsuite/gfortran.dg/complex_read.f90
index c12b66c..102a135 100644
--- a/gcc/testsuite/gfortran.dg/complex_read.f90
+++ b/gcc/testsuite/gfortran.dg/complex_read.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! Test of the fix to the bug in NIST fm906.for.
 ! Contributed by Paul Thomas  <pault@gcc.gnu.org>
 !
diff --git a/gcc/testsuite/gfortran.dg/complex_write.f90 b/gcc/testsuite/gfortran.dg/complex_write.f90
index 694c069..763f3ab 100644
--- a/gcc/testsuite/gfortran.dg/complex_write.f90
+++ b/gcc/testsuite/gfortran.dg/complex_write.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! pr 19071
 ! test case provided by
 !   Thomas.Koenig@online.de
diff --git a/gcc/testsuite/gfortran.dg/convert_implied_open.f90 b/gcc/testsuite/gfortran.dg/convert_implied_open.f90
index 9c25b5d..1f0abf3 100644
--- a/gcc/testsuite/gfortran.dg/convert_implied_open.f90
+++ b/gcc/testsuite/gfortran.dg/convert_implied_open.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! { dg-options "-fconvert=swap" }
 ! PR 26735 - implied open didn't use to honor -fconvert
 program main
diff --git a/gcc/testsuite/gfortran.dg/dollar_edit_descriptor_1.f b/gcc/testsuite/gfortran.dg/dollar_edit_descriptor_1.f
index af22c45..93e5033 100644
--- a/gcc/testsuite/gfortran.dg/dollar_edit_descriptor_1.f
+++ b/gcc/testsuite/gfortran.dg/dollar_edit_descriptor_1.f
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! { dg-options "-w" }
 ! PR libfortran/20006
       character*5 c
diff --git a/gcc/testsuite/gfortran.dg/dos_eol.f b/gcc/testsuite/gfortran.dg/dos_eol.f
index 3a22a14..77f36a5 100644
--- a/gcc/testsuite/gfortran.dg/dos_eol.f
+++ b/gcc/testsuite/gfortran.dg/dos_eol.f
@@ -1,5 +1,5 @@
 ! PR libfortran/19678 and PR libfortran/19679
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
       integer i, j
       
       open (10,status='scratch')
diff --git a/gcc/testsuite/gfortran.dg/empty_format_1.f90 b/gcc/testsuite/gfortran.dg/empty_format_1.f90
index 79a2d0c..e49ea4a 100644
--- a/gcc/testsuite/gfortran.dg/empty_format_1.f90
+++ b/gcc/testsuite/gfortran.dg/empty_format_1.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR 17709
 ! We weren't resetting the internal EOR flag correctly, so the second read
 ! wasn't advancing to the next line.
diff --git a/gcc/testsuite/gfortran.dg/endfile.f b/gcc/testsuite/gfortran.dg/endfile.f
index 6ece545..61b43b8 100644
--- a/gcc/testsuite/gfortran.dg/endfile.f
+++ b/gcc/testsuite/gfortran.dg/endfile.f
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR25550 file data corrupted after reading end of file.
 ! Derived from example given in PR from Dale Ranta.
 ! Contributed by Jerry DeLisle  <jvdelisle@gcc.gnu.org> 
diff --git a/gcc/testsuite/gfortran.dg/endfile.f90 b/gcc/testsuite/gfortran.dg/endfile.f90
index 1eabe9f..60875ce 100644
--- a/gcc/testsuite/gfortran.dg/endfile.f90
+++ b/gcc/testsuite/gfortran.dg/endfile.f90
@@ -1,4 +1,4 @@
-! { dg-do run } 
+! { dg-do run { target fd_truncate } } 
 ! pr18364 endfile does not truncate file.
 !   write out 20 records
 !   rewind
diff --git a/gcc/testsuite/gfortran.dg/eof_1.f90 b/gcc/testsuite/gfortran.dg/eof_1.f90
index 05726bd..09bf923 100644
--- a/gcc/testsuite/gfortran.dg/eof_1.f90
+++ b/gcc/testsuite/gfortran.dg/eof_1.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! Program to test for proper EOF errors when reading past the end of a file.
 ! We used to get this wrong when a formatted read followed a list formatted
 ! read.
diff --git a/gcc/testsuite/gfortran.dg/eor_1.f90 b/gcc/testsuite/gfortran.dg/eor_1.f90
index dd3b5e9..fecbe92 100644
--- a/gcc/testsuite/gfortran.dg/eor_1.f90
+++ b/gcc/testsuite/gfortran.dg/eor_1.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR 19451: The test for advance='NO' with eor used to be reversed.
 program main
   character*2 c
diff --git a/gcc/testsuite/gfortran.dg/eor_handling_1.f90 b/gcc/testsuite/gfortran.dg/eor_handling_1.f90
index 241f8a0..20b1998 100644
--- a/gcc/testsuite/gfortran.dg/eor_handling_1.f90
+++ b/gcc/testsuite/gfortran.dg/eor_handling_1.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR 17992:  Reading an empty file should yield zero with pad='YES'
 ! (which is the default).
 ! Test case supplied by milan@cmm.ki.si.
diff --git a/gcc/testsuite/gfortran.dg/eor_handling_2.f90 b/gcc/testsuite/gfortran.dg/eor_handling_2.f90
index 9ae5638..ece547b 100644
--- a/gcc/testsuite/gfortran.dg/eor_handling_2.f90
+++ b/gcc/testsuite/gfortran.dg/eor_handling_2.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR 19568:  Don't read across end of line when the format is longer
 !            than the line length and pad='yes' (default)
 program main
diff --git a/gcc/testsuite/gfortran.dg/eor_handling_3.f90 b/gcc/testsuite/gfortran.dg/eor_handling_3.f90
index 4225e86..7ba5c4b 100644
--- a/gcc/testsuite/gfortran.dg/eor_handling_3.f90
+++ b/gcc/testsuite/gfortran.dg/eor_handling_3.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR 19595:  Handle end-of-record condition with pad=yes (default)
 program main
   integer i1, i2
diff --git a/gcc/testsuite/gfortran.dg/eor_handling_4.f90 b/gcc/testsuite/gfortran.dg/eor_handling_4.f90
index 300c10b..ce9fe5e 100644
--- a/gcc/testsuite/gfortran.dg/eor_handling_4.f90
+++ b/gcc/testsuite/gfortran.dg/eor_handling_4.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR 20092, 20131:  Handle end-of-record condition with pad=yes (default)
 ! for standard input.  This test case only really tests  anything if,
 ! by changing unit 5, you get to manipulate the standard input.
diff --git a/gcc/testsuite/gfortran.dg/eor_handling_5.f90 b/gcc/testsuite/gfortran.dg/eor_handling_5.f90
index c116fb7..661d67c 100644
--- a/gcc/testsuite/gfortran.dg/eor_handling_5.f90
+++ b/gcc/testsuite/gfortran.dg/eor_handling_5.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR 20661: Handle non-advancing I/O with iostat
 ! Test case by Walt Brainerd, The Fortran Company
 
diff --git a/gcc/testsuite/gfortran.dg/error_recovery_5.f90 b/gcc/testsuite/gfortran.dg/error_recovery_5.f90
index 88acf93..9cb696c 100644
--- a/gcc/testsuite/gfortran.dg/error_recovery_5.f90
+++ b/gcc/testsuite/gfortran.dg/error_recovery_5.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR34411 hang-up during read of non-expected input
 ! Test case derived from that given in PR
 ! Prior to patch, the do loop was infinite, limits set in this one
diff --git a/gcc/testsuite/gfortran.dg/fgetc_1.f90 b/gcc/testsuite/gfortran.dg/fgetc_1.f90
index 966e15a..6277f3c 100644
--- a/gcc/testsuite/gfortran.dg/fgetc_1.f90
+++ b/gcc/testsuite/gfortran.dg/fgetc_1.f90
@@ -1,5 +1,5 @@
 ! Testcase for the FGETC and FPUTC intrinsics
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
   character(len=5) s
   integer st
 
diff --git a/gcc/testsuite/gfortran.dg/fgetc_2.f90 b/gcc/testsuite/gfortran.dg/fgetc_2.f90
index 6dd12c4..9c1a5da 100644
--- a/gcc/testsuite/gfortran.dg/fgetc_2.f90
+++ b/gcc/testsuite/gfortran.dg/fgetc_2.f90
@@ -1,5 +1,5 @@
 ! Testcase for the FGETC and FPUTC intrinsics
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
   character(len=5) s
   integer st
 
diff --git a/gcc/testsuite/gfortran.dg/flush_1.f90 b/gcc/testsuite/gfortran.dg/flush_1.f90
index 90875dc..e35955a 100644
--- a/gcc/testsuite/gfortran.dg/flush_1.f90
+++ b/gcc/testsuite/gfortran.dg/flush_1.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR 22390 Implement flush statement
 program flush_1
 
diff --git a/gcc/testsuite/gfortran.dg/fmt_exhaust.f90 b/gcc/testsuite/gfortran.dg/fmt_exhaust.f90
index 5db3405..bea3f80 100644
--- a/gcc/testsuite/gfortran.dg/fmt_exhaust.f90
+++ b/gcc/testsuite/gfortran.dg/fmt_exhaust.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR27304 Test running out of data descriptors with data remaining.
 ! Derived from case in PR.  Submitted by Jerry DeLisle <jvdelisle@gcc.gnu.org>.
       program test
diff --git a/gcc/testsuite/gfortran.dg/fmt_huge.f90 b/gcc/testsuite/gfortran.dg/fmt_huge.f90
index 43c4e2a..f7b243c 100644
--- a/gcc/testsuite/gfortran.dg/fmt_huge.f90
+++ b/gcc/testsuite/gfortran.dg/fmt_huge.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR32446 printing big numbers in F0.1 format.
 ! This segfaulted before the patch.
       open (10, status="scratch")
diff --git a/gcc/testsuite/gfortran.dg/fmt_read.f90 b/gcc/testsuite/gfortran.dg/fmt_read.f90
index 3b33946..779ebae 100644
--- a/gcc/testsuite/gfortran.dg/fmt_read.f90
+++ b/gcc/testsuite/gfortran.dg/fmt_read.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! pr18398, missing data on sequential formatted reads
 ! test contributed by Thomas.Koenig@online.de
       open(7,status='scratch')
diff --git a/gcc/testsuite/gfortran.dg/fmt_t_1.f90 b/gcc/testsuite/gfortran.dg/fmt_t_1.f90
index 157ba13..a456265 100644
--- a/gcc/testsuite/gfortran.dg/fmt_t_1.f90
+++ b/gcc/testsuite/gfortran.dg/fmt_t_1.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
       integer nrow, vec(15)
       open (10, status="scratch")
       write (10, fmt='(a)') '001    1 2 3 4 5 6'
diff --git a/gcc/testsuite/gfortran.dg/fmt_t_2.f90 b/gcc/testsuite/gfortran.dg/fmt_t_2.f90
index c2b8694..6fe8c38 100644
--- a/gcc/testsuite/gfortran.dg/fmt_t_2.f90
+++ b/gcc/testsuite/gfortran.dg/fmt_t_2.f90
@@ -1,5 +1,5 @@
 ! { dg-options "" }
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! pr24699, handle end-of-record on READ with T format
 ! test contributed by Jerry DeLisle <jvdelisle@gcc.gnu.org>
       character*132 :: foost1, foost2, foost3
diff --git a/gcc/testsuite/gfortran.dg/fmt_t_3.f90 b/gcc/testsuite/gfortran.dg/fmt_t_3.f90
index 1ec67e1..c7bf8e8 100644
--- a/gcc/testsuite/gfortran.dg/fmt_t_3.f90
+++ b/gcc/testsuite/gfortran.dg/fmt_t_3.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR31051 bug with x and t format descriptors.
 ! Test case prepared by Jerry DeLisle  <jvdelisle@gcc.gnu.org> from PR.
 program t
diff --git a/gcc/testsuite/gfortran.dg/fmt_t_4.f90 b/gcc/testsuite/gfortran.dg/fmt_t_4.f90
index e40a4fc..62b8d49 100644
--- a/gcc/testsuite/gfortran.dg/fmt_t_4.f90
+++ b/gcc/testsuite/gfortran.dg/fmt_t_4.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR31199, test case from PR report.
        program write_write
        character(len=20) :: a,b,c
diff --git a/gcc/testsuite/gfortran.dg/fmt_t_5.f90 b/gcc/testsuite/gfortran.dg/fmt_t_5.f90
index 14185cc..c472e89 100644
--- a/gcc/testsuite/gfortran.dg/fmt_t_5.f90
+++ b/gcc/testsuite/gfortran.dg/fmt_t_5.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR32678 GFortan works incorrectly when writing with FORMAT Tx
 ! Before patch, NULLs were inserted in output.
 ! Test case from reporter enhanced to detect this problem.
diff --git a/gcc/testsuite/gfortran.dg/fmt_t_7.f b/gcc/testsuite/gfortran.dg/fmt_t_7.f
index 443cd2f..baef07e 100644
--- a/gcc/testsuite/gfortran.dg/fmt_t_7.f
+++ b/gcc/testsuite/gfortran.dg/fmt_t_7.f
@@ -1,4 +1,4 @@
-! { dg-do run }

+! { dg-do run { target fd_truncate } }

 ! PR34974 null bytes when reverse-tabbing long records

 ! Test case prpared by Jerry DeLisle <jvdelisle@gcc.gnu.org>

        program test

diff --git a/gcc/testsuite/gfortran.dg/fseek.f90 b/gcc/testsuite/gfortran.dg/fseek.f90
index a42575c..acc8211 100644
--- a/gcc/testsuite/gfortran.dg/fseek.f90
+++ b/gcc/testsuite/gfortran.dg/fseek.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 
 PROGRAM test_fseek
   INTEGER, PARAMETER :: SEEK_SET = 0, SEEK_CUR = 1, SEEK_END = 2, fd=10
diff --git a/gcc/testsuite/gfortran.dg/ftell_1.f90 b/gcc/testsuite/gfortran.dg/ftell_1.f90
index 4f617ac..59ea85e 100644
--- a/gcc/testsuite/gfortran.dg/ftell_1.f90
+++ b/gcc/testsuite/gfortran.dg/ftell_1.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
   integer(kind=8) o, o2
 
   open (10, status="scratch")
diff --git a/gcc/testsuite/gfortran.dg/ftell_2.f90 b/gcc/testsuite/gfortran.dg/ftell_2.f90
index ec7c96c..d8fd348 100644
--- a/gcc/testsuite/gfortran.dg/ftell_2.f90
+++ b/gcc/testsuite/gfortran.dg/ftell_2.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
   integer(kind=8) o
   open (10, status="scratch")
   if (ftell(10) /= 0) call abort
diff --git a/gcc/testsuite/gfortran.dg/func_derived_3.f90 b/gcc/testsuite/gfortran.dg/func_derived_3.f90
index 6facf21..5eb60cf 100644
--- a/gcc/testsuite/gfortran.dg/func_derived_3.f90
+++ b/gcc/testsuite/gfortran.dg/func_derived_3.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! This tests the "virtual fix" for PR19561, where pointers to derived
 ! types were not generating correct code.  This testcase is based on
 ! the original PR example.  This example not only tests the
diff --git a/gcc/testsuite/gfortran.dg/inquire_5.f90 b/gcc/testsuite/gfortran.dg/inquire_5.f90
index 2a5678b..b2e07be 100644
--- a/gcc/testsuite/gfortran.dg/inquire_5.f90
+++ b/gcc/testsuite/gfortran.dg/inquire_5.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! pr19314 inquire(..position=..) segfaults
 ! test by Thomas.Koenig@online.de
 !         bdavis9659@comcast.net
diff --git a/gcc/testsuite/gfortran.dg/inquire_9.f90 b/gcc/testsuite/gfortran.dg/inquire_9.f90
index 99cd1af..407eddb 100644
--- a/gcc/testsuite/gfortran.dg/inquire_9.f90
+++ b/gcc/testsuite/gfortran.dg/inquire_9.f90
@@ -1,5 +1,5 @@
 ! PR fortran/24774
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
   logical :: l
   l = .true.
   inquire (file='inquire_9 file that should not exist', exist=l)
diff --git a/gcc/testsuite/gfortran.dg/iostat_1.f90 b/gcc/testsuite/gfortran.dg/iostat_1.f90
index 79bc001..2517eb9 100644
--- a/gcc/testsuite/gfortran.dg/iostat_1.f90
+++ b/gcc/testsuite/gfortran.dg/iostat_1.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR 23598 - The iostat variable wasn't reset if the previous
 ! I/O library call had an error.
 program main
diff --git a/gcc/testsuite/gfortran.dg/iostat_2.f90 b/gcc/testsuite/gfortran.dg/iostat_2.f90
index afda93e..f475064 100644
--- a/gcc/testsuite/gfortran.dg/iostat_2.f90
+++ b/gcc/testsuite/gfortran.dg/iostat_2.f90
@@ -1,5 +1,5 @@
 ! PR libfortran/23784
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
   integer i
   close(10, status="whatever", iostat=i) ! { dg-warning "STATUS specifier in CLOSE statement.*has invalid value" }
   if (i == 0) call abort()
diff --git a/gcc/testsuite/gfortran.dg/list_read_1.f90 b/gcc/testsuite/gfortran.dg/list_read_1.f90
index 6fba90a..2a2c5d1 100644
--- a/gcc/testsuite/gfortran.dg/list_read_1.f90
+++ b/gcc/testsuite/gfortran.dg/list_read_1.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! Program to test terminators in list-directed input
 program list_read_1
   character(len=5) :: s
diff --git a/gcc/testsuite/gfortran.dg/list_read_4.f90 b/gcc/testsuite/gfortran.dg/list_read_4.f90
index fb1770e..ba17625 100644
--- a/gcc/testsuite/gfortran.dg/list_read_4.f90
+++ b/gcc/testsuite/gfortran.dg/list_read_4.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! Test of gfortran list directed read> check delimiters are correctly
 ! treated.  Written in f77 so that g77 will run for comparison.
 !
diff --git a/gcc/testsuite/gfortran.dg/list_read_5.f90 b/gcc/testsuite/gfortran.dg/list_read_5.f90
index f69d1f3..658c524 100644
--- a/gcc/testsuite/gfortran.dg/list_read_5.f90
+++ b/gcc/testsuite/gfortran.dg/list_read_5.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR25307 Check handling of end-of-file conditions for list directed reads.
 ! Prepared by Jerry DeLisle  <jvdelisle@gcc.gnu.org>
 program pr25307
diff --git a/gcc/testsuite/gfortran.dg/list_read_6.f90 b/gcc/testsuite/gfortran.dg/list_read_6.f90
index 5bab50b..296d94c 100644
--- a/gcc/testsuite/gfortran.dg/list_read_6.f90
+++ b/gcc/testsuite/gfortran.dg/list_read_6.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR30435 Slash at end of input not recognized according to standard.
 ! Test case from PR by Steve Kargl.
 
diff --git a/gcc/testsuite/gfortran.dg/list_read_7.f90 b/gcc/testsuite/gfortran.dg/list_read_7.f90
index 4ee0835..f9800f2 100644
--- a/gcc/testsuite/gfortran.dg/list_read_7.f90
+++ b/gcc/testsuite/gfortran.dg/list_read_7.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR33400 Formatted read fails if line ends without line break
 ! Test case modified from that in PR by <jvdelisle@gcc.gnu.org>
 integer, parameter :: fgsl_strmax = 128
diff --git a/gcc/testsuite/gfortran.dg/list_read_8.f90 b/gcc/testsuite/gfortran.dg/list_read_8.f90
index 4be75fd..85fa857 100644
--- a/gcc/testsuite/gfortran.dg/list_read_8.f90
+++ b/gcc/testsuite/gfortran.dg/list_read_8.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR34676 IO error delayed
 ! Test case from PR modified by <jvdelisle@gcc.gnu.org>
 implicit none
diff --git a/gcc/testsuite/gfortran.dg/namelist_11.f b/gcc/testsuite/gfortran.dg/namelist_11.f
index a8705cc..672ee26 100644
--- a/gcc/testsuite/gfortran.dg/namelist_11.f
+++ b/gcc/testsuite/gfortran.dg/namelist_11.f
@@ -1,4 +1,4 @@
-c { dg-do run }
+c { dg-do run { target fd_truncate } }
 c This program tests: namelist comment, a blank line before the nameilist name, the namelist name,
 c a scalar qualifier, various combinations of space, comma and lf delimiters, f-formats, e-formats
 c a blank line within the data read, nulls, a range qualifier, a new object name before end of data
diff --git a/gcc/testsuite/gfortran.dg/namelist_12.f b/gcc/testsuite/gfortran.dg/namelist_12.f
index 69fe3d8..dca9645 100644
--- a/gcc/testsuite/gfortran.dg/namelist_12.f
+++ b/gcc/testsuite/gfortran.dg/namelist_12.f
@@ -1,4 +1,4 @@
-c{ dg-do run }
+c{ dg-do run { target fd_truncate } }
 c This program repeats many of the same tests as test_nml_1 but for integer
 c instead of real. It also tests repeat nulls, comma delimited character read,
 c a triplet qualifier, a range with an assumed start, a quote delimited string,
diff --git a/gcc/testsuite/gfortran.dg/namelist_13.f90 b/gcc/testsuite/gfortran.dg/namelist_13.f90
index 185b522..1688e8d 100644
--- a/gcc/testsuite/gfortran.dg/namelist_13.f90
+++ b/gcc/testsuite/gfortran.dg/namelist_13.f90
@@ -1,4 +1,4 @@
-!{ dg-do run }
+!{ dg-do run { target fd_truncate } }
 ! Tests simple derived types.
 ! Provided by Paul Thomas - pault@gcc.gnu.org
 
diff --git a/gcc/testsuite/gfortran.dg/namelist_14.f90 b/gcc/testsuite/gfortran.dg/namelist_14.f90
index 729f1b2..d6ab294 100644
--- a/gcc/testsuite/gfortran.dg/namelist_14.f90
+++ b/gcc/testsuite/gfortran.dg/namelist_14.f90
@@ -1,4 +1,4 @@
-!{ dg-do run }
+!{ dg-do run { target fd_truncate } }
 ! Tests various combinations of intrinsic types, derived types, arrays,
 ! dummy arguments and common to check nml_get_addr_expr in trans-io.c.
 ! See comments below for selection.
diff --git a/gcc/testsuite/gfortran.dg/namelist_15.f90 b/gcc/testsuite/gfortran.dg/namelist_15.f90
index e900e71..65b015c 100644
--- a/gcc/testsuite/gfortran.dg/namelist_15.f90
+++ b/gcc/testsuite/gfortran.dg/namelist_15.f90
@@ -1,4 +1,4 @@
-!{ dg-do run }
+!{ dg-do run { target fd_truncate } }
 ! Tests arrays of derived types containing derived type arrays whose
 ! components are character arrays - exercises object name parser in
 ! list_read.c. Checks that namelist output can be reread. 
diff --git a/gcc/testsuite/gfortran.dg/namelist_16.f90 b/gcc/testsuite/gfortran.dg/namelist_16.f90
index c6eb8f7..023816f 100644
--- a/gcc/testsuite/gfortran.dg/namelist_16.f90
+++ b/gcc/testsuite/gfortran.dg/namelist_16.f90
@@ -1,4 +1,4 @@
-!{ dg-do run }
+!{ dg-do run { target fd_truncate } }
 ! Tests namelist on complex variables
 ! provided by Paul Thomas - pault@gcc.gnu.org
 program namelist_16
diff --git a/gcc/testsuite/gfortran.dg/namelist_17.f90 b/gcc/testsuite/gfortran.dg/namelist_17.f90
index e3eac52..a802a22 100644
--- a/gcc/testsuite/gfortran.dg/namelist_17.f90
+++ b/gcc/testsuite/gfortran.dg/namelist_17.f90
@@ -1,4 +1,4 @@
-!{ dg-do run }
+!{ dg-do run { target fd_truncate } }
 ! Tests namelist on logical variables
 ! provided by Paul Thomas - pault@gcc.gnu.org
 
diff --git a/gcc/testsuite/gfortran.dg/namelist_18.f90 b/gcc/testsuite/gfortran.dg/namelist_18.f90
index eba8b6b..f5d4b3d 100644
--- a/gcc/testsuite/gfortran.dg/namelist_18.f90
+++ b/gcc/testsuite/gfortran.dg/namelist_18.f90
@@ -1,4 +1,4 @@
-!{ dg-do run }
+!{ dg-do run { target fd_truncate } }
 ! Tests character delimiters for namelist write 
 ! provided by Paul Thomas - pault@gcc.gnu.org
 
diff --git a/gcc/testsuite/gfortran.dg/namelist_19.f90 b/gcc/testsuite/gfortran.dg/namelist_19.f90
index c06abf5..f7c6d69 100644
--- a/gcc/testsuite/gfortran.dg/namelist_19.f90
+++ b/gcc/testsuite/gfortran.dg/namelist_19.f90
@@ -1,4 +1,4 @@
-!{ dg-do run }
+!{ dg-do run { target fd_truncate } }
 ! Test namelist error trapping.
 ! provided by Paul Thomas - pault@gcc.gnu.org
 
diff --git a/gcc/testsuite/gfortran.dg/namelist_20.f90 b/gcc/testsuite/gfortran.dg/namelist_20.f90
index 155cf6f..9b2d896 100644
--- a/gcc/testsuite/gfortran.dg/namelist_20.f90
+++ b/gcc/testsuite/gfortran.dg/namelist_20.f90
@@ -1,4 +1,4 @@
-!{ dg-do run }
+!{ dg-do run { target fd_truncate } }
 ! Tests namelist io for an explicit shape array with negative bounds
 ! provided by Paul Thomas - pault@gcc.gnu.org
 
diff --git a/gcc/testsuite/gfortran.dg/namelist_21.f90 b/gcc/testsuite/gfortran.dg/namelist_21.f90
index 463ef1b..8d2852d 100644
--- a/gcc/testsuite/gfortran.dg/namelist_21.f90
+++ b/gcc/testsuite/gfortran.dg/namelist_21.f90
@@ -1,4 +1,4 @@
-!{ dg-do run }
+!{ dg-do run { target fd_truncate } }
 ! Tests filling arrays from a namelist read when object list is not complete.
 ! Developed from a test case provided by Christoph Jacob.
 ! Contributed by Jerry DeLisle  <jvdelisle@gcc.gnu.org>.
diff --git a/gcc/testsuite/gfortran.dg/namelist_22.f90 b/gcc/testsuite/gfortran.dg/namelist_22.f90
index 6face8b..3119e80 100644
--- a/gcc/testsuite/gfortran.dg/namelist_22.f90
+++ b/gcc/testsuite/gfortran.dg/namelist_22.f90
@@ -1,4 +1,4 @@
-!{ dg-do run }
+!{ dg-do run { target fd_truncate } }
 ! Tests filling arrays from a namelist read when object list is not complete.
 ! This is the same as namelist_21.f90 except using spaces as seperators instead
 ! of commas. Developed from a test case provided by Christoph Jacob.
diff --git a/gcc/testsuite/gfortran.dg/namelist_23.f90 b/gcc/testsuite/gfortran.dg/namelist_23.f90
index 70a0080..7d69ef6 100644
--- a/gcc/testsuite/gfortran.dg/namelist_23.f90
+++ b/gcc/testsuite/gfortran.dg/namelist_23.f90
@@ -1,4 +1,4 @@
-!{ dg-do run }
+!{ dg-do run { target fd_truncate } }
 ! PR26136 Filling logical variables from namelist read when object list is not
 ! complete.  Test case derived from PR.
 ! Contributed by Jerry DeLisle  <jvdelisle@gcc.gnu.org>
diff --git a/gcc/testsuite/gfortran.dg/namelist_24.f90 b/gcc/testsuite/gfortran.dg/namelist_24.f90
index 11cd2d0..c89ab3d 100644
--- a/gcc/testsuite/gfortran.dg/namelist_24.f90
+++ b/gcc/testsuite/gfortran.dg/namelist_24.f90
@@ -1,4 +1,4 @@
-!{ dg-do run }
+!{ dg-do run { target fd_truncate } }
 !{ dg-options -std=gnu }
 ! Tests namelist read when more data is provided then specified by 
 ! array qualifier in list.
diff --git a/gcc/testsuite/gfortran.dg/namelist_26.f90 b/gcc/testsuite/gfortran.dg/namelist_26.f90
index 2c1b260..a9cf4fd 100644
--- a/gcc/testsuite/gfortran.dg/namelist_26.f90
+++ b/gcc/testsuite/gfortran.dg/namelist_26.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR30918 Failure to skip commented out NAMELIST
 ! Before the patch, this read the commented out namelist and iuse would
 ! equal 2 when done.  Test case from PR.
diff --git a/gcc/testsuite/gfortran.dg/namelist_27.f90 b/gcc/testsuite/gfortran.dg/namelist_27.f90
index 10b0031..e645ca5 100644
--- a/gcc/testsuite/gfortran.dg/namelist_27.f90
+++ b/gcc/testsuite/gfortran.dg/namelist_27.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR31052 Bad IOSTAT values when readings NAMELISTs past EOF.
 ! Patch derived from PR, submitted by Jerry DeLisle <jvdelisle@gcc.gnu.org>
 program gfcbug61
diff --git a/gcc/testsuite/gfortran.dg/namelist_28.f90 b/gcc/testsuite/gfortran.dg/namelist_28.f90
index 53b1f0f..09015d5 100644
--- a/gcc/testsuite/gfortran.dg/namelist_28.f90
+++ b/gcc/testsuite/gfortran.dg/namelist_28.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR31052 Bad IOSTAT values when readings NAMELISTs past EOF.
 ! Patch derived from PR, submitted by Jerry DeLisle <jvdelisle@gcc.gnu.org>
 program gfcbug61
diff --git a/gcc/testsuite/gfortran.dg/namelist_37.f90 b/gcc/testsuite/gfortran.dg/namelist_37.f90
index 9ff6297..e200ad0 100644
--- a/gcc/testsuite/gfortran.dg/namelist_37.f90
+++ b/gcc/testsuite/gfortran.dg/namelist_37.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR33039 Read NAMELIST:  reads wrong namelist name
 ! Test case from PR modified by Jerry DeLisle <jvdelisle@gcc.gnu.org>

 PROGRAM namelist

diff --git a/gcc/testsuite/gfortran.dg/namelist_38.f90 b/gcc/testsuite/gfortran.dg/namelist_38.f90
index 5578654..ed05369 100644
--- a/gcc/testsuite/gfortran.dg/namelist_38.f90
+++ b/gcc/testsuite/gfortran.dg/namelist_38.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR33253 namelist: reading back a string, also fixed writing with delimiters.
 ! Test case modified from that of the PR by
 ! Jerry DeLisle  <jvdelisle@gcc.gnu.org>
diff --git a/gcc/testsuite/gfortran.dg/namelist_39.f90 b/gcc/testsuite/gfortran.dg/namelist_39.f90
index 3672140..82e631e 100644
--- a/gcc/testsuite/gfortran.dg/namelist_39.f90
+++ b/gcc/testsuite/gfortran.dg/namelist_39.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR33421 and PR33253 Weird quotation of namelist output of character arrays
 ! Test case from Toon Moone, adapted by Jerry DeLisle  <jvdelisle@gcc.gnu.org>
 
diff --git a/gcc/testsuite/gfortran.dg/namelist_40.f90 b/gcc/testsuite/gfortran.dg/namelist_40.f90
index 3c9d813..5e2c9d8 100644
--- a/gcc/testsuite/gfortran.dg/namelist_40.f90
+++ b/gcc/testsuite/gfortran.dg/namelist_40.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR33672 Additional runtime checks needed for namelist reads
 ! Submitted by Jerry DeLisle  <jvdelisle@gcc.gnu.org>
 
diff --git a/gcc/testsuite/gfortran.dg/namelist_41.f90 b/gcc/testsuite/gfortran.dg/namelist_41.f90
index 2d9a71a..16e0d42 100644
--- a/gcc/testsuite/gfortran.dg/namelist_41.f90
+++ b/gcc/testsuite/gfortran.dg/namelist_41.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR34291 Segfault on &end in namelist expanded read of character
   implicit none
   character(len=10), dimension(2)  :: var
diff --git a/gcc/testsuite/gfortran.dg/namelist_42.f90 b/gcc/testsuite/gfortran.dg/namelist_42.f90
index e2efb6f..55dd2ca 100644
--- a/gcc/testsuite/gfortran.dg/namelist_42.f90
+++ b/gcc/testsuite/gfortran.dg/namelist_42.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! { dg-options "-mieee" { target sh*-*-* } }
 !
 ! PR fortran/34427
diff --git a/gcc/testsuite/gfortran.dg/namelist_43.f90 b/gcc/testsuite/gfortran.dg/namelist_43.f90
index 467b11d..abad355 100644
--- a/gcc/testsuite/gfortran.dg/namelist_43.f90
+++ b/gcc/testsuite/gfortran.dg/namelist_43.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! { dg-options "-mieee" { target sh*-*-* } }
 !
 ! PR fortran/34427
diff --git a/gcc/testsuite/gfortran.dg/namelist_44.f90 b/gcc/testsuite/gfortran.dg/namelist_44.f90
index 1439902..35ea667 100644
--- a/gcc/testsuite/gfortran.dg/namelist_44.f90
+++ b/gcc/testsuite/gfortran.dg/namelist_44.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 !
 ! PR fortran/34530
 !
diff --git a/gcc/testsuite/gfortran.dg/namelist_char_only.f90 b/gcc/testsuite/gfortran.dg/namelist_char_only.f90
index 9993669..ff06171 100644
--- a/gcc/testsuite/gfortran.dg/namelist_char_only.f90
+++ b/gcc/testsuite/gfortran.dg/namelist_char_only.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! { dg-options "-O0" }
 ! Test patch for PR24416.f90 - a used to come back from the read with var
 ! prepended.
diff --git a/gcc/testsuite/gfortran.dg/namelist_use.f90 b/gcc/testsuite/gfortran.dg/namelist_use.f90
index 0460630..ab84686 100644
--- a/gcc/testsuite/gfortran.dg/namelist_use.f90
+++ b/gcc/testsuite/gfortran.dg/namelist_use.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! This tests the fix for PR22010, where namelists were not being written to
 ! and read back from modules.  It has two namelists: one that is USE
 ! associated and another that is concatenated by USE and host association.
diff --git a/gcc/testsuite/gfortran.dg/namelist_use_only.f90 b/gcc/testsuite/gfortran.dg/namelist_use_only.f90
index a9adf01..ce80d5e 100644
--- a/gcc/testsuite/gfortran.dg/namelist_use_only.f90
+++ b/gcc/testsuite/gfortran.dg/namelist_use_only.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! This tests the fix for PR22010, where namelists were not being written to
 ! and read back from modules.  It checks that namelists from modules that are
 ! selected by an ONLY declaration work correctly, even when the variables in
diff --git a/gcc/testsuite/gfortran.dg/noadv_size.f90 b/gcc/testsuite/gfortran.dg/noadv_size.f90
index a3a88b1..cfc507a 100644
--- a/gcc/testsuite/gfortran.dg/noadv_size.f90
+++ b/gcc/testsuite/gfortran.dg/noadv_size.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR 20774: Handle size parameter for non-advancing I/O correctly
 program main
   open(77,status='scratch')
diff --git a/gcc/testsuite/gfortran.dg/open_access_append_1.f90 b/gcc/testsuite/gfortran.dg/open_access_append_1.f90
index 8dae327..f67a8a9 100644
--- a/gcc/testsuite/gfortran.dg/open_access_append_1.f90
+++ b/gcc/testsuite/gfortran.dg/open_access_append_1.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! Testcase for the GNU extension OPEN(...,ACCESS="APPEND")
   open (10,file="foo")
   close (10,status="delete")
diff --git a/gcc/testsuite/gfortran.dg/open_readonly_1.f90 b/gcc/testsuite/gfortran.dg/open_readonly_1.f90
index 3adbbd3..87d3ba7 100644
--- a/gcc/testsuite/gfortran.dg/open_readonly_1.f90
+++ b/gcc/testsuite/gfortran.dg/open_readonly_1.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR19451
 ! Writing to a non-empty readonly file caused a segfault.
 ! We were still trying to write the EOR after an error ocurred
diff --git a/gcc/testsuite/gfortran.dg/overwrite_1.f b/gcc/testsuite/gfortran.dg/overwrite_1.f
index dda9a8b..f6c5fdb 100644
--- a/gcc/testsuite/gfortran.dg/overwrite_1.f
+++ b/gcc/testsuite/gfortran.dg/overwrite_1.f
@@ -1,4 +1,4 @@
-! { dg-do run } 
+! { dg-do run { target fd_truncate } } 
 ! PR 19872 - closed and re-opened file not overwriten
       implicit none
       integer i(4)
diff --git a/gcc/testsuite/gfortran.dg/pad_no.f90 b/gcc/testsuite/gfortran.dg/pad_no.f90
index c023ade..1b5fb2f 100644
--- a/gcc/testsuite/gfortran.dg/pad_no.f90
+++ b/gcc/testsuite/gfortran.dg/pad_no.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! Test correct operation for pad='no'.
 program main
   character(len=1) line(2)
diff --git a/gcc/testsuite/gfortran.dg/pr12884.f b/gcc/testsuite/gfortran.dg/pr12884.f
index 425604c..811bef1 100644
--- a/gcc/testsuite/gfortran.dg/pr12884.f
+++ b/gcc/testsuite/gfortran.dg/pr12884.f
@@ -1,4 +1,4 @@
-c { dg-do run }
+c { dg-do run { target fd_truncate } }
 c pr 12884
 c test namelist with input file containg / before namelist. Also checks
 c non-standard use of $ instead of &
diff --git a/gcc/testsuite/gfortran.dg/pr17090.f90 b/gcc/testsuite/gfortran.dg/pr17090.f90
index 6a685c2..bae2bb7 100644
--- a/gcc/testsuite/gfortran.dg/pr17090.f90
+++ b/gcc/testsuite/gfortran.dg/pr17090.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! pr 17090 Runtime I/O error
 ! bdavis9659@comcast.net 
 ! 9/12/2004
diff --git a/gcc/testsuite/gfortran.dg/pr17285.f90 b/gcc/testsuite/gfortran.dg/pr17285.f90
index 58aee32..8aa353c 100644
--- a/gcc/testsuite/gfortran.dg/pr17285.f90
+++ b/gcc/testsuite/gfortran.dg/pr17285.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! pr 17285
 ! Test that namelist can read its own output.
 ! At the same time, check arrays and different terminations
diff --git a/gcc/testsuite/gfortran.dg/pr17286.f90 b/gcc/testsuite/gfortran.dg/pr17286.f90
index e9beb6d..5b94694 100644
--- a/gcc/testsuite/gfortran.dg/pr17286.f90
+++ b/gcc/testsuite/gfortran.dg/pr17286.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR17286
 ! Namelist read failed when spaces exist between the '=' and the numbers
 ! This is a libgfortran bug
diff --git a/gcc/testsuite/gfortran.dg/pr18122.f90 b/gcc/testsuite/gfortran.dg/pr18122.f90
index 3907f0a..6e7f200 100644
--- a/gcc/testsuite/gfortran.dg/pr18122.f90
+++ b/gcc/testsuite/gfortran.dg/pr18122.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! test namelist with scalars and arrays.
 ! Based on example provided by thomas.koenig@online.de
 
diff --git a/gcc/testsuite/gfortran.dg/pr18210.f90 b/gcc/testsuite/gfortran.dg/pr18210.f90
index 6095984..253f291 100644
--- a/gcc/testsuite/gfortran.dg/pr18210.f90
+++ b/gcc/testsuite/gfortran.dg/pr18210.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! Names in upper case and object names starting column 2
 ! Based on example provided by thomas.koenig@online.de
 
diff --git a/gcc/testsuite/gfortran.dg/pr18392.f90 b/gcc/testsuite/gfortran.dg/pr18392.f90
index de156f5..3c15d4b 100644
--- a/gcc/testsuite/gfortran.dg/pr18392.f90
+++ b/gcc/testsuite/gfortran.dg/pr18392.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! pr 18392
 ! test namelist with derived types
 ! Based on example provided by thomas.koenig@online.de
diff --git a/gcc/testsuite/gfortran.dg/pr19155.f b/gcc/testsuite/gfortran.dg/pr19155.f
index 6387c3f..003c7fd 100644
--- a/gcc/testsuite/gfortran.dg/pr19155.f
+++ b/gcc/testsuite/gfortran.dg/pr19155.f
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 !
 ! PR libfortran/19155
 ! We accept 'E+00' as a valid real number. The standard says it is not,
diff --git a/gcc/testsuite/gfortran.dg/pr19216.f b/gcc/testsuite/gfortran.dg/pr19216.f
index 76c3938..40b3b5a 100644
--- a/gcc/testsuite/gfortran.dg/pr19216.f
+++ b/gcc/testsuite/gfortran.dg/pr19216.f
@@ -1,5 +1,5 @@
 ! PR libfortran/19216
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
        integer dat(3), i, j
        data dat / 3,2,1 /
 
diff --git a/gcc/testsuite/gfortran.dg/pr19467.f90 b/gcc/testsuite/gfortran.dg/pr19467.f90
index ab4fa99..03cc745 100644
--- a/gcc/testsuite/gfortran.dg/pr19467.f90
+++ b/gcc/testsuite/gfortran.dg/pr19467.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! pr 19467
 ! test namelist with character arrays
 ! Based on example provided by paulthomas2@wanadoo.fr
diff --git a/gcc/testsuite/gfortran.dg/pr19657.f b/gcc/testsuite/gfortran.dg/pr19657.f
index 1fe32ac..a8e2012 100644
--- a/gcc/testsuite/gfortran.dg/pr19657.f
+++ b/gcc/testsuite/gfortran.dg/pr19657.f
@@ -1,4 +1,4 @@
-c { dg-do run }
+c { dg-do run { target fd_truncate } }
 c pr 19657
 c test namelist not skipped if ending with logical.
 c Based on example provided by fuyuki@ccsr.u-tokyo.ac.jp
diff --git a/gcc/testsuite/gfortran.dg/pr20257.f90 b/gcc/testsuite/gfortran.dg/pr20257.f90
index 3808829..ca5a00b 100644
--- a/gcc/testsuite/gfortran.dg/pr20257.f90
+++ b/gcc/testsuite/gfortran.dg/pr20257.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
   integer,parameter :: n = 10000
   real(8) array(10000)
 
diff --git a/gcc/testsuite/gfortran.dg/read_bad_advance.f90 b/gcc/testsuite/gfortran.dg/read_bad_advance.f90
index 5b43cfe..3ca4493 100644
--- a/gcc/testsuite/gfortran.dg/read_bad_advance.f90
+++ b/gcc/testsuite/gfortran.dg/read_bad_advance.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR27138 Failure to advance line on bad list directed read.
 ! Submitted by Jerry DeLisle  <jvdelisle@gcc.gnu.org>
       program test
diff --git a/gcc/testsuite/gfortran.dg/read_comma.f b/gcc/testsuite/gfortran.dg/read_comma.f
index 593c56d..024fcea 100644
--- a/gcc/testsuite/gfortran.dg/read_comma.f
+++ b/gcc/testsuite/gfortran.dg/read_comma.f
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR25039 This test checks that commas in input fields for formatted sequential
 ! reads are interpreted as the read completion.  If no comma is encountered the
 ! normal field width determines the end of the read.  The test case also checks
diff --git a/gcc/testsuite/gfortran.dg/read_eof_1.f90 b/gcc/testsuite/gfortran.dg/read_eof_1.f90
index b5c4901..78ff14a 100644
--- a/gcc/testsuite/gfortran.dg/read_eof_1.f90
+++ b/gcc/testsuite/gfortran.dg/read_eof_1.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR25697 Check that reading from a file that is at end-of-file does not
 ! segfault or give error.  Test case derived from example in PR from Dale Ranta.
 ! Contributed by Jerry DeLisle  <jvdelisle@gcc.gnu.org>
diff --git a/gcc/testsuite/gfortran.dg/read_eof_2.f90 b/gcc/testsuite/gfortran.dg/read_eof_2.f90
index 9017548..539553d 100644
--- a/gcc/testsuite/gfortran.dg/read_eof_2.f90
+++ b/gcc/testsuite/gfortran.dg/read_eof_2.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR25835 Check that reading from a file that is at end-of-file does not
 ! segfault or give error.  Test case derived from example in PR from Dale Ranta.
 ! Contributed by Jerry DeLisle  <jvdelisle@gcc.gnu.org>
diff --git a/gcc/testsuite/gfortran.dg/read_eof_3.f90 b/gcc/testsuite/gfortran.dg/read_eof_3.f90
index 5cca802..af35aa6 100644
--- a/gcc/testsuite/gfortran.dg/read_eof_3.f90
+++ b/gcc/testsuite/gfortran.dg/read_eof_3.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR25835 Check that reading from a file that is at end-of-file does not
 ! segfault or give error.  Test case derived from example in PR from Dale Ranta.
 ! Contributed by Jerry DeLisle  <jvdelisle@gcc.gnu.org>
diff --git a/gcc/testsuite/gfortran.dg/read_eof_4.f90 b/gcc/testsuite/gfortran.dg/read_eof_4.f90
index ee95268..da0ae5c 100644
--- a/gcc/testsuite/gfortran.dg/read_eof_4.f90
+++ b/gcc/testsuite/gfortran.dg/read_eof_4.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR 27575 and PR 30009: This test checks the error checking for end
 ! of file condition.
 ! Derived from test case in PR.
diff --git a/gcc/testsuite/gfortran.dg/read_many_1.f b/gcc/testsuite/gfortran.dg/read_many_1.f
index 4fac689..d015cf8 100644
--- a/gcc/testsuite/gfortran.dg/read_many_1.f
+++ b/gcc/testsuite/gfortran.dg/read_many_1.f
@@ -1,4 +1,4 @@
-!{ dg-do run }
+!{ dg-do run { target fd_truncate } }
 ! PR26423 Large file I/O error related to buffering
 ! Test case derived from case by Dale Ranta.
 ! Submitted  by Jerry DeLisle  <jvdelisle@gcc.gnu.org> 
diff --git a/gcc/testsuite/gfortran.dg/read_noadvance.f90 b/gcc/testsuite/gfortran.dg/read_noadvance.f90
index e55763a..987d811 100644
--- a/gcc/testsuite/gfortran.dg/read_noadvance.f90
+++ b/gcc/testsuite/gfortran.dg/read_noadvance.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! pr24719, non-advancing read should read more than one line
 ! test contributed by jerry delisle <jvdelisle@gcc.gnu.org>
       implicit none
diff --git a/gcc/testsuite/gfortran.dg/read_size_noadvance.f90 b/gcc/testsuite/gfortran.dg/read_size_noadvance.f90
index 819a28d..37ecff9 100644
--- a/gcc/testsuite/gfortran.dg/read_size_noadvance.f90
+++ b/gcc/testsuite/gfortran.dg/read_size_noadvance.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR26890 Test for use of SIZE variable in IO list.
 ! Test case from Paul Thomas.
 ! Submitted by Jerry DeLisle <jvdelisle@gcc.gnu.org>
diff --git a/gcc/testsuite/gfortran.dg/read_x_past.f b/gcc/testsuite/gfortran.dg/read_x_past.f
index 4a6d053..16f6623 100644
--- a/gcc/testsuite/gfortran.dg/read_x_past.f
+++ b/gcc/testsuite/gfortran.dg/read_x_past.f
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! { dg-options -w }
 ! PR 26661 : Test reading X's past file end with no LF or CR.
 ! PR 26880 : Tests that rewind clears the gfc_unit read_bad flag.
diff --git a/gcc/testsuite/gfortran.dg/record_marker_1.f90 b/gcc/testsuite/gfortran.dg/record_marker_1.f90
index 5bcfbc6..d5d5a2e 100644
--- a/gcc/testsuite/gfortran.dg/record_marker_1.f90
+++ b/gcc/testsuite/gfortran.dg/record_marker_1.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! { dg-options "-frecord-marker=4" }
 
 program main
diff --git a/gcc/testsuite/gfortran.dg/record_marker_2.f b/gcc/testsuite/gfortran.dg/record_marker_2.f
index 725af12..83ee7fe 100644
--- a/gcc/testsuite/gfortran.dg/record_marker_2.f
+++ b/gcc/testsuite/gfortran.dg/record_marker_2.f
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! { dg-options "-frecord-marker=4" }
 ! This file is all about BACKSPACE
 ! Adapted from gfortran.dg/backspace.f
diff --git a/gcc/testsuite/gfortran.dg/record_marker_3.f90 b/gcc/testsuite/gfortran.dg/record_marker_3.f90
index 7459d72..dd9d455 100644
--- a/gcc/testsuite/gfortran.dg/record_marker_3.f90
+++ b/gcc/testsuite/gfortran.dg/record_marker_3.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! { dg-options "-frecord-marker=8" }
 
 program main
diff --git a/gcc/testsuite/gfortran.dg/rewind_1.f90 b/gcc/testsuite/gfortran.dg/rewind_1.f90
index cbd2ef1..61392ab 100644
--- a/gcc/testsuite/gfortran.dg/rewind_1.f90
+++ b/gcc/testsuite/gfortran.dg/rewind_1.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! Check that rewind doesn't delete a file.
 ! Writing to the file truncates it at the end of the current record.  Out
 ! IO library was defering the actual truncation until the file was rewound.
diff --git a/gcc/testsuite/gfortran.dg/runtime_warning_1.f90 b/gcc/testsuite/gfortran.dg/runtime_warning_1.f90
index 6af85c3..c27e7a2 100644
--- a/gcc/testsuite/gfortran.dg/runtime_warning_1.f90
+++ b/gcc/testsuite/gfortran.dg/runtime_warning_1.f90
@@ -3,7 +3,7 @@
 ! Contributor Francois-Xavier Coudert  <coudert@clipper.ens.fr>
 !
 ! { dg-options "-pedantic" }
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 !
      character*5 c
      open (42,status='scratch')
diff --git a/gcc/testsuite/gfortran.dg/shape_3.f90 b/gcc/testsuite/gfortran.dg/shape_3.f90
index ea725a0..f715645 100644
--- a/gcc/testsuite/gfortran.dg/shape_3.f90
+++ b/gcc/testsuite/gfortran.dg/shape_3.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR 34980 - we got a segfault for calling shape
 !            with a scalar.
 program main
diff --git a/gcc/testsuite/gfortran.dg/slash_1.f90 b/gcc/testsuite/gfortran.dg/slash_1.f90
index d4a59a3..b62b338 100644
--- a/gcc/testsuite/gfortran.dg/slash_1.f90
+++ b/gcc/testsuite/gfortran.dg/slash_1.f90
@@ -1,5 +1,5 @@
 ! PR libfortran/22170
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
   integer i
   open (10,status='scratch')
   write (10,'(A,2/,A)') '12', '17'
diff --git a/gcc/testsuite/gfortran.dg/stat_1.f90 b/gcc/testsuite/gfortran.dg/stat_1.f90
index 5325634..b9dc100 100644
--- a/gcc/testsuite/gfortran.dg/stat_1.f90
+++ b/gcc/testsuite/gfortran.dg/stat_1.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! { dg-options "-std=gnu" }
   character(len=*), parameter :: f = "testfile"
   integer :: s1(13), r1, s2(13), r2, s3(13), r3
diff --git a/gcc/testsuite/gfortran.dg/stat_2.f90 b/gcc/testsuite/gfortran.dg/stat_2.f90
index 4bd17ca..b57b52f 100644
--- a/gcc/testsuite/gfortran.dg/stat_2.f90
+++ b/gcc/testsuite/gfortran.dg/stat_2.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! { dg-options "-std=gnu" }
   character(len=*), parameter :: f = "testfile"
   integer :: s1(13), r1, s2(13), r2, s3(13), r3
diff --git a/gcc/testsuite/gfortran.dg/streamio_11.f90 b/gcc/testsuite/gfortran.dg/streamio_11.f90
index 2084a23..0ec2f2e 100644
--- a/gcc/testsuite/gfortran.dg/streamio_11.f90
+++ b/gcc/testsuite/gfortran.dg/streamio_11.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR29277 Stream IO test 11, tests formatted form.
 ! Contributed by Tobias Burnas.
 program stream_test
diff --git a/gcc/testsuite/gfortran.dg/streamio_15.f90 b/gcc/testsuite/gfortran.dg/streamio_15.f90
index 4d1638e..09d9a2a 100644
--- a/gcc/testsuite/gfortran.dg/streamio_15.f90
+++ b/gcc/testsuite/gfortran.dg/streamio_15.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR35132 Formatted stream I/O write should truncate.
 ! Test case adapted from PR by Jerry DeLisle  <jvdelisle@gcc.gnu.org>
 program main
diff --git a/gcc/testsuite/gfortran.dg/streamio_3.f90 b/gcc/testsuite/gfortran.dg/streamio_3.f90
index b96e5fc..0cbab67 100644
--- a/gcc/testsuite/gfortran.dg/streamio_3.f90
+++ b/gcc/testsuite/gfortran.dg/streamio_3.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR25828 Stream IO test 3, tests read_x and inquire.
 ! Contributed by Jerry DeLisle <jvdelisle@verizon.net>.
 program streamio_3
diff --git a/gcc/testsuite/gfortran.dg/streamio_4.f90 b/gcc/testsuite/gfortran.dg/streamio_4.f90
index 64d2f52..957df8c 100644
--- a/gcc/testsuite/gfortran.dg/streamio_4.f90
+++ b/gcc/testsuite/gfortran.dg/streamio_4.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR25828 Stream IO test 4, Tests string read and writes, single byte.
 ! Verifies buffering is working correctly and position="append"
 ! Contributed by Jerry DeLisle <jvdelisle@verizon.net>.
diff --git a/gcc/testsuite/gfortran.dg/tl_editing.f90 b/gcc/testsuite/gfortran.dg/tl_editing.f90
index d2a7ede..aa3a01c 100644
--- a/gcc/testsuite/gfortran.dg/tl_editing.f90
+++ b/gcc/testsuite/gfortran.dg/tl_editing.f90
@@ -1,4 +1,4 @@
-! { dg-do run }     
+! { dg-do run { target fd_truncate } }     
 ! Test of fix to bug triggered by NIST fm908.for.
 ! Left tabbing, followed by X or T-tabbing to the right would
 ! cause spaces to be overwritten on output data.
diff --git a/gcc/testsuite/gfortran.dg/unf_io_convert_1.f90 b/gcc/testsuite/gfortran.dg/unf_io_convert_1.f90
index 3d35312..ad79fd7 100644
--- a/gcc/testsuite/gfortran.dg/unf_io_convert_1.f90
+++ b/gcc/testsuite/gfortran.dg/unf_io_convert_1.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! { dg-options "-pedantic" }
 !  This test verifies the most basic sequential unformatted I/O
 !  with convert="swap".
diff --git a/gcc/testsuite/gfortran.dg/unf_io_convert_2.f90 b/gcc/testsuite/gfortran.dg/unf_io_convert_2.f90
index f29f6ee..b38da24 100644
--- a/gcc/testsuite/gfortran.dg/unf_io_convert_2.f90
+++ b/gcc/testsuite/gfortran.dg/unf_io_convert_2.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 program main
   complex(kind=4) :: c
   real(kind=4) :: a(2)
diff --git a/gcc/testsuite/gfortran.dg/unf_read_corrupted_2.f90 b/gcc/testsuite/gfortran.dg/unf_read_corrupted_2.f90
index 1788b45..4dd5234 100644
--- a/gcc/testsuite/gfortran.dg/unf_read_corrupted_2.f90
+++ b/gcc/testsuite/gfortran.dg/unf_read_corrupted_2.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR31880 silent data corruption in gfortran read statement
 ! Test from PR.
       program r3
diff --git a/gcc/testsuite/gfortran.dg/unf_short_record_1.f90 b/gcc/testsuite/gfortran.dg/unf_short_record_1.f90
index 45c94c2..9dca08e 100644
--- a/gcc/testsuite/gfortran.dg/unf_short_record_1.f90
+++ b/gcc/testsuite/gfortran.dg/unf_short_record_1.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR 29627 - partial reads of unformatted records
 program main
   character a(3)
diff --git a/gcc/testsuite/gfortran.dg/unformatted_recl_1.f90 b/gcc/testsuite/gfortran.dg/unformatted_recl_1.f90
index dbafff1..9618ff2 100644
--- a/gcc/testsuite/gfortran.dg/unformatted_recl_1.f90
+++ b/gcc/testsuite/gfortran.dg/unformatted_recl_1.f90
@@ -1,4 +1,4 @@
-! { dg-do run } 
+! { dg-do run { target fd_truncate } } 
 ! PR31099 Runtime error on legal code using RECL
 program test
   integer(kind=4) :: a, b
diff --git a/gcc/testsuite/gfortran.dg/unformatted_subrecord_1.f90 b/gcc/testsuite/gfortran.dg/unformatted_subrecord_1.f90
index 5d59daa..02ed288 100644
--- a/gcc/testsuite/gfortran.dg/unformatted_subrecord_1.f90
+++ b/gcc/testsuite/gfortran.dg/unformatted_subrecord_1.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! { dg-options "-fmax-subrecord-length=16" }
 ! Test Intel record markers with 16-byte subrecord sizes.
 ! PR 32770:  Use explicit kinds for all integers and constants,
diff --git a/gcc/testsuite/gfortran.dg/vector_subscript_3.f90 b/gcc/testsuite/gfortran.dg/vector_subscript_3.f90
index 974ee4b..3fa306e 100644
--- a/gcc/testsuite/gfortran.dg/vector_subscript_3.f90
+++ b/gcc/testsuite/gfortran.dg/vector_subscript_3.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 !
 ! Test the fix for PR34875, in which the read with a vector index
 ! used to do nothing.
diff --git a/gcc/testsuite/gfortran.dg/write_back.f b/gcc/testsuite/gfortran.dg/write_back.f
index a491e24..a8472f7 100644
--- a/gcc/testsuite/gfortran.dg/write_back.f
+++ b/gcc/testsuite/gfortran.dg/write_back.f
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR 26499 : Positioning of EOF after backspaces and write.
 ! This test verifies that the last write truncates the file.
 ! Submitted by Jerry DeLisle <jvdelisle@verizon.net>.
diff --git a/gcc/testsuite/gfortran.dg/write_check3.f90 b/gcc/testsuite/gfortran.dg/write_check3.f90
index 802a06d..4895096 100644
--- a/gcc/testsuite/gfortran.dg/write_check3.f90
+++ b/gcc/testsuite/gfortran.dg/write_check3.f90
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR29936 Missed constraint on RECL=specifier in unformatted sequential WRITE
 ! Submitted by Jerry DeLisle  <jvdelisle@gcc.gnu.org>
 program us_recl
diff --git a/gcc/testsuite/gfortran.dg/write_rewind_1.f b/gcc/testsuite/gfortran.dg/write_rewind_1.f
index 0e23187..94fec99 100644
--- a/gcc/testsuite/gfortran.dg/write_rewind_1.f
+++ b/gcc/testsuite/gfortran.dg/write_rewind_1.f
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR 26499 : Positioning of EOF after  write and rewind.
 ! Test case from Dale Ranta in PR.
 ! Submitted by Jerry DeLisle <jvdelisle@verizon.net>.
diff --git a/gcc/testsuite/gfortran.dg/write_rewind_2.f b/gcc/testsuite/gfortran.dg/write_rewind_2.f
index 501995c..e1a8dec 100644
--- a/gcc/testsuite/gfortran.dg/write_rewind_2.f
+++ b/gcc/testsuite/gfortran.dg/write_rewind_2.f
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR 26499  Test write with rewind sequences to make sure buffering and
 ! end-of-file conditions are handled correctly.  Derived from test case by Dale
 ! Ranta.  Submitted by Jerry DeLisle <jvdelisle@gcc.gnu.org>.
diff --git a/gcc/testsuite/gfortran.dg/x_slash_1.f b/gcc/testsuite/gfortran.dg/x_slash_1.f
index f4f9ed2..de576e2 100644
--- a/gcc/testsuite/gfortran.dg/x_slash_1.f
+++ b/gcc/testsuite/gfortran.dg/x_slash_1.f
@@ -1,4 +1,4 @@
-c { dg-do run }
+c { dg-do run { target fd_truncate } }
 c This program tests the fixes to PR22570.
 c
 c Provided by Paul Thomas - pault@gcc.gnu.org
diff --git a/gcc/testsuite/gfortran.dg/x_slash_2.f b/gcc/testsuite/gfortran.dg/x_slash_2.f
index 6023b64..9c42f67 100644
--- a/gcc/testsuite/gfortran.dg/x_slash_2.f
+++ b/gcc/testsuite/gfortran.dg/x_slash_2.f
@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do run { target fd_truncate } }
 ! PR 34887 - reverse tabs followed by a slash used to confuse I/O.
       program main
       character(len=2) :: b, a
diff --git a/gcc/testsuite/gfortran.fortran-torture/execute/backspace.x b/gcc/testsuite/gfortran.fortran-torture/execute/backspace.x
new file mode 100644
index 0000000..b4a54bb
--- /dev/null
+++ b/gcc/testsuite/gfortran.fortran-torture/execute/backspace.x
@@ -0,0 +1,7 @@
+load_lib target-supports.exp
+
+if { ! [check_effective_target_fd_truncate] } {
+	return 1
+}
+
+return 0
diff --git a/gcc/testsuite/gfortran.fortran-torture/execute/list_read_1.x b/gcc/testsuite/gfortran.fortran-torture/execute/list_read_1.x
new file mode 100644
index 0000000..b4a54bb
--- /dev/null
+++ b/gcc/testsuite/gfortran.fortran-torture/execute/list_read_1.x
@@ -0,0 +1,7 @@
+load_lib target-supports.exp
+
+if { ! [check_effective_target_fd_truncate] } {
+	return 1
+}
+
+return 0
diff --git a/gcc/testsuite/gfortran.fortran-torture/execute/read_null_string.x b/gcc/testsuite/gfortran.fortran-torture/execute/read_null_string.x
new file mode 100644
index 0000000..b4a54bb
--- /dev/null
+++ b/gcc/testsuite/gfortran.fortran-torture/execute/read_null_string.x
@@ -0,0 +1,7 @@
+load_lib target-supports.exp
+
+if { ! [check_effective_target_fd_truncate] } {
+	return 1
+}
+
+return 0
diff --git a/gcc/testsuite/gfortran.fortran-torture/execute/seq_io.x b/gcc/testsuite/gfortran.fortran-torture/execute/seq_io.x
new file mode 100644
index 0000000..b4a54bb
--- /dev/null
+++ b/gcc/testsuite/gfortran.fortran-torture/execute/seq_io.x
@@ -0,0 +1,7 @@
+load_lib target-supports.exp
+
+if { ! [check_effective_target_fd_truncate] } {
+	return 1
+}
+
+return 0
diff --git a/gcc/testsuite/gfortran.fortran-torture/execute/slash_edit.x b/gcc/testsuite/gfortran.fortran-torture/execute/slash_edit.x
new file mode 100644
index 0000000..b4a54bb
--- /dev/null
+++ b/gcc/testsuite/gfortran.fortran-torture/execute/slash_edit.x
@@ -0,0 +1,7 @@
+load_lib target-supports.exp
+
+if { ! [check_effective_target_fd_truncate] } {
+	return 1
+}
+
+return 0
diff --git a/gcc/testsuite/gfortran.fortran-torture/execute/unopened_unit_1.x b/gcc/testsuite/gfortran.fortran-torture/execute/unopened_unit_1.x
new file mode 100644
index 0000000..b4a54bb
--- /dev/null
+++ b/gcc/testsuite/gfortran.fortran-torture/execute/unopened_unit_1.x
@@ -0,0 +1,7 @@
+load_lib target-supports.exp
+
+if { ! [check_effective_target_fd_truncate] } {
+	return 1
+}
+
+return 0
diff --git a/gcc/testsuite/lib/target-supports.exp b/gcc/testsuite/lib/target-supports.exp
index 20bcdea..e2667ff 100644
--- a/gcc/testsuite/lib/target-supports.exp
+++ b/gcc/testsuite/lib/target-supports.exp
@@ -2227,6 +2227,45 @@ proc check_effective_target_pthread_h { } {
     }]
 }
 
+# Return 1 if the target can truncate a file from a file-descriptor,
+# as used by libgfortran/io/unix.c:fd_truncate; i.e. ftruncate or
+# chsize.  We test for a trivially functional truncation; no stubs.
+# As libgfortran uses _FILE_OFFSET_BITS 64, we do too; it'll cause a
+# different function to be used.
+
+proc check_effective_target_fd_truncate { } {
+    set prog {
+	#define _FILE_OFFSET_BITS 64
+	#include <unistd.h>
+	#include <stdio.h>
+	#include <stdlib.h>
+	int main ()
+	{
+	  FILE *f = fopen ("tst.tmp", "wb");
+	  int fd;
+	  const char t[] = "test writing more than ten characters";
+	  char s[11];
+	  fd =  fileno (f);
+	  write (fd, t, sizeof (t) - 1);
+	  lseek (fd, 0, 0);
+	  if (ftruncate (fd, 10) != 0)
+	    exit (1);
+	  close (fd);
+	  f = fopen ("tst.tmp", "rb");
+	  if (fread (s, 1, sizeof (s), f) != 10 || strncmp (s, t, 10) != 0)
+	    exit (1);
+	  exit (0);
+	}
+    }
+
+    if { [check_runtime ftruncate $prog] } {
+      return 1;
+    }
+
+    regsub "ftruncate" $prog "chsize" prog
+    return [check_runtime chsize $prog]
+}
+
 # Add to FLAGS all the target-specific flags needed to access the c99 runtime.
 
 proc add_options_for_c99_runtime { flags } {