re PR target/65296 ([avr] fix various issues with specs file generation)

gcc/
	PR target/65296
	* configure.ac [avr]: Check as for options -mrmw, --mlink-relax.
	* configure: Regenerate.
	* config.in: Regenerate.
	* doc/invoke.texi (AVR Options) [-mrmw]: Document it.
	[-mn-flash]: Document it.
	[__AVR_ARCH__]: Document avrtiny.
	* config/avr/gen-avr-mmcu-specs.c (config.h): Include it.
	(*asm_relax): Only define spec if HAVE_AS_AVR_MLINK_RELAX_OPTION.
	(*asm_rmw): Only define spec if HAVE_AS_AVR_MRMW_OPTION.
gcc/testsuite/
	PR target/65296
	* gcc.target/avr/tiny-memx: Use -mmcu instead of -march.
	* gcc.target/avr/tiny-caller-save.c: Same.

From-SVN: r221355

1 files changed, 64 insertions, 0 deletions

diff --git a/gcc/configure b/gcc/configure
index 1a35d5a..20dbce6 100755
--- a/gcc/configure
+++ b/gcc/configure
@@ -24185,6 +24185,70 @@ $as_echo "#define HAVE_AS_JSRDIRECT_RELOCS 1" >>confdefs.h
 fi
     ;;
 
+  avr-*-*)
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking assembler for --mlink-relax option" >&5
+$as_echo_n "checking assembler for --mlink-relax option... " >&6; }
+if test "${gcc_cv_as_avr_mlink_relax+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  gcc_cv_as_avr_mlink_relax=no
+  if test x$gcc_cv_as != x; then
+    $as_echo '.text' > conftest.s
+    if { ac_try='$gcc_cv_as $gcc_cv_as_flags --mlink-relax -o conftest.o conftest.s >&5'
+  { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; }
+    then
+	gcc_cv_as_avr_mlink_relax=yes
+    else
+      echo "configure: failed program was" >&5
+      cat conftest.s >&5
+    fi
+    rm -f conftest.o conftest.s
+  fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gcc_cv_as_avr_mlink_relax" >&5
+$as_echo "$gcc_cv_as_avr_mlink_relax" >&6; }
+if test $gcc_cv_as_avr_mlink_relax = yes; then
+
+$as_echo "#define HAVE_AS_AVR_MLINK_RELAX_OPTION 1" >>confdefs.h
+
+fi
+
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking assembler for -mrmw option" >&5
+$as_echo_n "checking assembler for -mrmw option... " >&6; }
+if test "${gcc_cv_as_avr_mrmw+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  gcc_cv_as_avr_mrmw=no
+  if test x$gcc_cv_as != x; then
+    $as_echo '.text' > conftest.s
+    if { ac_try='$gcc_cv_as $gcc_cv_as_flags -mrmw -o conftest.o conftest.s >&5'
+  { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; }
+    then
+	gcc_cv_as_avr_mrmw=yes
+    else
+      echo "configure: failed program was" >&5
+      cat conftest.s >&5
+    fi
+    rm -f conftest.o conftest.s
+  fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gcc_cv_as_avr_mrmw" >&5
+$as_echo "$gcc_cv_as_avr_mrmw" >&6; }
+if test $gcc_cv_as_avr_mrmw = yes; then
+
+$as_echo "#define HAVE_AS_AVR_MRMW_OPTION 1" >>confdefs.h
+
+fi
+    ;;
+
   cris-*-*)
     { $as_echo "$as_me:${as_lineno-$LINENO}: checking assembler for -no-mul-bug-abort option" >&5
 $as_echo_n "checking assembler for -no-mul-bug-abort option... " >&6; }