From e885309220343161f3b1286da1b6f2e62311eebd Mon Sep 17 00:00:00 2001
From: Eric Botcazou <ebotcazou@adacore.com>
Date: Mon, 22 Oct 2012 07:32:04 +0000
Subject: 	PR bootstrap/54820 	* Makefile.tpl (STAGE1_FLAGS_TO_PASS):
 New variable. 	(all-[+prefix+][+module+]): Pass stage1_args to sub-makes. 
 (all-stage[+id+]-[+prefix+][+module+]): Likewise, if prev is false. 
 (clean-stage[+id+]-[+prefix+][+module+]): Likewise, if prev is false. 
 (host_modules): Set stage1_args to STAGE1_FLAGS_TO_PASS. 	* Makefile.in:
 Regenerate. 	* configure.ac (have_static_libs): New variable and associated
 check. 	(stage1-ldflags): Move to after stage1_libs and set to
 -static-libstdc++ 	-static-libgcc if stage1_libs is empty and
 have_static_libs is yes. 	* configure: Regenerate.

---
 configure.ac | 44 +++++++++++++++++++++++++++++++++-----------
 1 file changed, 33 insertions(+), 11 deletions(-)

(limited to 'configure.ac')

diff --git a/configure.ac b/configure.ac
index f0d86d906..958eadd5e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1182,6 +1182,22 @@ if test -z "$LD"; then
   fi
 fi
 
+# Check whether -static-libstdc++ -static-libgcc is supported.
+have_static_libs=no
+if test "$GCC" = yes; then
+  saved_LDFLAGS="$LDFLAGS"
+
+  LDFLAGS="$LDFLAGS -static-libstdc++ -static-libgcc"
+  AC_MSG_CHECKING([whether g++ accepts -static-libstdc++ -static-libgcc])
+  AC_LANG_PUSH(C++)
+  AC_LINK_IFELSE([int main() {}],
+    [AC_MSG_RESULT([yes]); have_static_libs=yes],
+    [AC_MSG_RESULT([no])])
+  AC_LANG_POP(C++)
+
+  LDFLAGS="$saved_LDFLAGS"
+fi
+
 ACX_PROG_GNAT
 ACX_PROG_CMP_IGNORE_INITIAL
 
@@ -1478,17 +1494,6 @@ case $with_host_libstdcxx in
     ;;
 esac
 
-# Linker flags to use for stage1 or when not boostrapping.
-AC_ARG_WITH(stage1-ldflags,
-[AS_HELP_STRING([--with-stage1-ldflags=FLAGS], [linker flags for stage1])],
-[if test "$withval" = "no" -o "$withval" = "yes"; then
-   stage1_ldflags=
- else
-   stage1_ldflags=$withval
- fi],
-[stage1_ldflags=])
-AC_SUBST(stage1_ldflags)
-
 # Libraries to use for stage1 or when not bootstrapping.
 AC_ARG_WITH(stage1-libs,
 [AS_HELP_STRING([--with-stage1-libs=LIBS], [libraries for stage1])],
@@ -1500,6 +1505,23 @@ AC_ARG_WITH(stage1-libs,
 [stage1_libs=$with_host_libstdcxx])
 AC_SUBST(stage1_libs)
 
+# Linker flags to use for stage1 or when not bootstrapping.
+AC_ARG_WITH(stage1-ldflags,
+[AS_HELP_STRING([--with-stage1-ldflags=FLAGS], [linker flags for stage1])],
+[if test "$withval" = "no" -o "$withval" = "yes"; then
+   stage1_ldflags=
+ else
+   stage1_ldflags=$withval
+ fi],
+[stage1_ldflags=
+ # In stage 1, default to linking libstdc++ and libgcc statically with GCC
+ # if supported.  But if the user explicitly specified the libraries to use,
+ # trust that they are doing what they want.
+ if test "$stage1_libs" = "" -a "$have_static_libs" = yes; then
+   stage1_ldflags="-static-libstdc++ -static-libgcc"
+ fi])
+AC_SUBST(stage1_ldflags)
+
 # Libraries to use for stage2 and later builds.  This defaults to the
 # argument passed to --with-host-libstdcxx.
 AC_ARG_WITH(boot-libs,
-- 
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