Add -mrelax-relocations= to x86 assembler

The x86 relax relocations introduced in binutils 2.26 aren't supported
by linker on Solaris older than Solaris 12.  To use x86 assembler with
older Solaris linker, this patch adds

1. A command line option -mrelax-relocations= to x86 assembler to
control whether to generate relax relocations.
2. A configure option --enable-x86-relax-relocations to decide whether
x86 assembler should generate relax relocations by default.  It is
defaulted to yes, except for x86 Solaris targets older than Solaris 12.

gas/

	PR gas/19520
	* NEWS: Mention new command line option -mrelax-relocations and
	new configure option --enable-x86-relax-relocations for x86
	target.
	* config.in: Regenerated.
	* configure.ac: Add --enable-x86-relax-relocations.
	(ac_default_x86_relax_relocations): New.  Default to 1 except
	for x86 Solaris targets older than Solaris 12.
	(DEFAULT_GENERATE_X86_RELAX_RELOCATIONS): Define.
	* configure: Likewise.
	* config/tc-i386.c (generate_relax_relocations): New.
	(OPTION_MRELAX_RELOCATIONS): Likewise.
	(output_disp): Don't generate relax relocations if
	generate_relax_relocations is 0.
	(md_longopts): Add -mrelax-relocations.
	(md_show_usage): Likewise.
	(md_parse_option): Handle OPTION_MRELAX_RELOCATIONS.
	* doc/c-i386.texi: Document -mrelax-relocations=.
	* testsuite/gas/i386/got-no-relax.d: New file.
	* testsuite/gas/i386/x86-64-gotpcrel-no-relax.d: Likewise.
	* testsuite/gas/i386/got.d: Pass -mrelax-relocations=yes to as.
	* testsuite/gas/i386/localpic.d: Likewise.
	* testsuite/gas/i386/mixed-mode-reloc32.d: Likewise.
	* testsuite/gas/i386/reloc32.d: Likewise.
	* testsuite/gas/i386/x86-64-gotpcrel.d: Likewise.
	* testsuite/gas/i386/x86-64-localpic.d: Likewise.
	* testsuite/gas/i386/ilp32/x86-64-gotpcrel.d: Likewise.
	* testsuite/gas/i386/ilp32/x86-64-localpic.d: Likewise.
	* testsuite/gas/i386/i386.exp: Run got-no-relax and
	x86-64-gotpcrel-no-relax.

ld/

	PR gas/19520
	* testsuite/ld-i386/branch1.d: Pass -mrelax-relocations=yes to as.
	* testsuite/ld-i386/call1.d: Likewise.
	* testsuite/ld-i386/call2.d: Likewise.
	* testsuite/ld-i386/call3a.d: Likewise.
	* testsuite/ld-i386/call3b.d: Likewise.
	* testsuite/ld-i386/call3c.d: Likewise.
	* testsuite/ld-i386/call3d.d: Likewise.
	* testsuite/ld-i386/call3e.d: Likewise.
	* testsuite/ld-i386/call3f.d: Likewise.
	* testsuite/ld-i386/call3g.d: Likewise.
	* testsuite/ld-i386/call3h.d: Likewise.
	* testsuite/ld-i386/jmp1.d: Likewise.
	* testsuite/ld-i386/jmp2.d: Likewise.
	* testsuite/ld-i386/lea1c.d: Likewise.
	* testsuite/ld-i386/load1.d: Likewise.
	* testsuite/ld-i386/load2.d: Likewise.
	* testsuite/ld-i386/load3.d: Likewise.
	* testsuite/ld-i386/load4a.d: Likewise.
	* testsuite/ld-i386/load5a.d: Likewise.
	* testsuite/ld-i386/mov2b.d: Likewise.
	* testsuite/ld-i386/mov3.d: Likewise.
	* testsuite/ld-ifunc/ifunc-21-x86-64.d: Likewise.
	* testsuite/ld-ifunc/ifunc-22-x86-64.d: Likewise.
	* testsuite/ld-ifunc/ifunc-5r-local-x86-64.d: Likewise.
	* testsuite/ld-x86-64/call1a.d: Likewise.
	* testsuite/ld-x86-64/call1b.d: Likewise.
	* testsuite/ld-x86-64/call1c.d: Likewise.
	* testsuite/ld-x86-64/call1d.d: Likewise.
	* testsuite/ld-x86-64/call1e.d: Likewise.
	* testsuite/ld-x86-64/call1f.d: Likewise.
	* testsuite/ld-x86-64/call1h.d: Likewise.
	* testsuite/ld-x86-64/call1i.d: Likewise.
	* testsuite/ld-x86-64/load1a.d: Likewise.
	* testsuite/ld-x86-64/load1b.d: Likewise.
	* testsuite/ld-i386/got1a.S: Load GOT into %ecx and use it.
	* testsuite/ld-i386/got1.dd: Updated.
	* testsuite/ld-i386/got1d.S (1): Removed.
	* testsuite/ld-i386/i386.exp: Add -Wa,-mrelax-relocations=yes.
	* testsuite/ld-x86-64/x86-64.exp: Likewise.

1 files changed, 36 insertions, 2 deletions

diff --git a/gas/configure b/gas/configure
index b1731f0..cd7182f 100755
--- a/gas/configure
+++ b/gas/configure
@@ -765,6 +765,7 @@ enable_largefile
 enable_targets
 enable_checking
 enable_compressed_debug_sections
+enable_x86_relax_relocations
 enable_werror
 enable_build_warnings
 enable_nls
@@ -1415,6 +1416,8 @@ Optional Features:
   --enable-checking       enable run-time checks
   --enable-compressed-debug-sections={all,gas,none}
                           compress debug sections by default
+  --enable-x86-relax-relocations
+                          generate x86 relax relocations by default
   --enable-werror         treat compile warnings as errors
   --enable-build-warnings enable build-time compiler warnings
   --disable-nls           do not use Native Language Support
@@ -10972,7 +10975,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10975 "configure"
+#line 10978 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11078,7 +11081,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11081 "configure"
+#line 11084 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11680,6 +11683,17 @@ if test "${enable_compressed_debug_sections+set}" = set; then :
 esac
 fi
 
+# PR gas/19520
+# Decide if x86 assembler should generate relax relocations.
+ac_default_x86_relax_relocations=unset
+# Provide a configure time option to override our default.
+# Check whether --enable-x86_relax_relocations was given.
+if test "${enable_x86_relax_relocations+set}" = set; then :
+  enableval=$enable_x86_relax_relocations; case "${enableval}" in
+  no)  ac_default_x86_relax_relocations=0 ;;
+esac
+fi
+
 using_cgen=no
 
 
@@ -12085,6 +12099,17 @@ $as_echo "#define STRICTCOFF 1" >>confdefs.h
 
 	;;
 
+      i386-*-solaris2 \
+      | x86_64-*-solaris2 \
+      | i386-*-solaris2.[0-9] \
+      | i386-*-solaris2.1[01] \
+      | x86_64-*-solaris2.1[01])
+	if test ${this_target} = $target \
+	   && test ${ac_default_x86_relax_relocations} = unset; then
+	  ac_default_x86_relax_relocations=0
+	fi
+	;;
+
       i860-*-*)
 	{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: GAS support for ${generic_target} is preliminary and a work in progress" >&5
 $as_echo "$as_me: WARNING: GAS support for ${generic_target} is preliminary and a work in progress" >&2;}
@@ -12505,6 +12530,15 @@ _ACEOF
 
 done
 
+if test ${ac_default_x86_relax_relocations} = unset; then
+  ac_default_x86_relax_relocations=1
+fi
+
+cat >>confdefs.h <<_ACEOF
+#define DEFAULT_GENERATE_X86_RELAX_RELOCATIONS $ac_default_x86_relax_relocations
+_ACEOF
+
+
 if test x$ac_default_compressed_debug_sections = xyes ; then
 
 $as_echo "#define DEFAULT_FLAG_COMPRESS_DEBUG 1" >>confdefs.h