Default to DWARF 4 on Solaris if linker supports CIEv3

	* configure.ac (gcc_cv_ld_eh_frame_ciev3): New test.
	* configure: Regenerate.
	* config.in: Regenerate.
	* config/sol2.c (solaris_override_options): Only enforce DWARF 2
	if !HAVE_LD_EH_FRAME_CIEV3.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@196866 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 40 insertions, 0 deletions

diff --git a/gcc/configure b/gcc/configure
index 69d99af62a6..eac96cdac70 100755
--- a/gcc/configure
+++ b/gcc/configure
@@ -26350,6 +26350,46 @@ fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $gcc_cv_ld_eh_frame_hdr" >&5
 $as_echo "$gcc_cv_ld_eh_frame_hdr" >&6; }
 
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking linker CIEv3 in .eh_frame support" >&5
+$as_echo_n "checking linker CIEv3 in .eh_frame support... " >&6; }
+gcc_cv_ld_eh_frame_ciev3=no
+if test $in_tree_ld = yes ; then
+  if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
+     && test $in_tree_ld_is_elf = yes; then
+    gcc_cv_ld_eh_frame_ciev3=yes
+  fi
+elif test x$gcc_cv_ld != x; then
+  if echo "$ld_ver" | grep GNU > /dev/null; then
+    gcc_cv_ld_eh_frame_ciev3=yes
+    if test 0"$ld_date" -lt 20040513; then
+      if test -n "$ld_date"; then
+	# If there was date string, but was earlier than 2004-05-13, fail
+	gcc_cv_ld_eh_frame_ciev3=no
+      elif test "$ld_vers_major" -lt 2; then
+	gcc_cv_ld_eh_frame_ciev3=no
+      elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 16; then
+	gcc_cv_ld_eh_frame_ciev3=no
+      fi
+    fi
+  else
+    case "$target" in
+      *-*-solaris2*)
+        # Sun ld added support for CIE v3 in .eh_frame in Solaris 11.1.
+        if test "$ld_vers_major" -gt 1 || test "$ld_vers_minor" -ge 2324; then
+          gcc_cv_ld_eh_frame_ciev3=yes
+        fi
+        ;;
+    esac
+  fi
+fi
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_LD_EH_FRAME_CIEV3 `if test x"$gcc_cv_ld_eh_frame_ciev3" = xyes; then echo 1; else echo 0; fi`
+_ACEOF
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gcc_cv_ld_eh_frame_ciev3" >&5
+$as_echo "$gcc_cv_ld_eh_frame_ciev3" >&6; }
+
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking linker position independent executable support" >&5
 $as_echo_n "checking linker position independent executable support... " >&6; }
 gcc_cv_ld_pie=no