From 719faf1ca0c2227a150fb139b73873e893f411db Mon Sep 17 00:00:00 2001
From: aoliva <aoliva@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Thu, 3 Sep 2009 05:55:57 +0000
Subject: ChangeLog: * configure.ac (--with-build-config): New.  Set
 BUILD_CONFIG. Default to bootstrap-debug only if compare-debug works. *
 configure: Rebuilt. * Makefile.tpl: Make BUILD_CONFIG configure-configurable.
 * Makefile.in: Rebuilt. contrib/ChangeLog: * bootstrap-debug-big.mk
 (STAGE2_CFLAGS): Drop -gtoggle. * bootstrap-debug-lean.mk: Update comments.
 (STAGE2_CFLAGS): Likewise. (do-compare): Don't override. gcc/ChangeLog: *
 doc/invoke.texi (BUILD_CONFIG): Document --with-build-config.
 (bootstrap-debug): Explain conditions in which it becomes default.
 (bootstrap-debug-big): Rather than duplicate bootstrap-debug, make it add to
 it.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@151367 138bc75d-0d04-0410-961f-82ee72b054a4
---
 configure.ac | 33 ++++++++++++++++++++++++++++++---
 1 file changed, 30 insertions(+), 3 deletions(-)

(limited to 'configure.ac')

diff --git a/configure.ac b/configure.ac
index 48fa58019ed..caff7e5af13 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2459,13 +2459,40 @@ case "$have_compiler:$host:$target:$enable_bootstrap" in
 esac
 
 # Adjust the toplevel makefile according to whether bootstrap was selected.
-case "$enable_bootstrap" in
+case $enable_bootstrap in
   yes)
-    bootstrap_suffix=bootstrap ;;
+    bootstrap_suffix=bootstrap
+    BUILD_CONFIG=bootstrap-debug
+    ;;
   no)
-    bootstrap_suffix=no-bootstrap ;;
+    bootstrap_suffix=no-bootstrap
+    BUILD_CONFIG=
+    ;;
 esac
 
+AC_MSG_CHECKING(for default BUILD_CONFIG)
+if test "x${with_build_config}" != x; then
+  BUILD_CONFIG=$with_build_config
+else
+  case $BUILD_CONFIG in
+  bootstrap-debug)
+    if echo "int f (void) { return 0; }" > conftest.c &&
+       ${CC} -c conftest.c &&
+       mv conftest.o conftest.o.g0 &&
+       ${CC} -c -g conftest.c &&
+       mv conftest.o conftest.o.g &&
+       ${srcdir}/contrib/compare-debug conftest.o.g0 conftest.o.g; then
+      :
+    else
+      BUILD_CONFIG=
+    fi
+    rm -f conftest.c conftest.o conftest.o.g0 conftest.o.g
+    ;;
+  esac
+fi
+AC_MSG_RESULT($BUILD_CONFIG)
+AC_SUBST(BUILD_CONFIG)
+
 for module in ${build_configdirs} ; do
   if test -z "${no_recursion}" \
      && test -f ${build_subdir}/${module}/Makefile; then
-- 
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