Add support for --enable-target-optspace to compile with -Os instead of -O2, and default m32r to use it

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@19374 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 18 insertions, 0 deletions

diff --git a/configure.in b/configure.in
index 21c0b4b6e70..f66ce6f6842 100644
--- a/configure.in
+++ b/configure.in
@@ -311,6 +311,24 @@ case "${target}" in
     ;;
 esac
 
+# If --enable-target-optspace always use -Os instead of -O2 to build
+# the target libraries, similarly if it is not specified, use -Os
+# on selected platforms.
+echo "---${enable_target_optspace}:${target}--" 1>&2
+case "${enable_target_optspace}:${target}" in
+  yes:*)
+    target_makefile_frag="${target_makefile_frag} config/mt-ospace"
+    ;;
+  :m32r-*)
+    target_makefile_frag="${target_makefile_frag} config/mt-ospace"
+    ;;
+  no:* | :*)
+    ;;
+  *)
+    echo "*** bad value \"${enable_target_optspace}\" for --enable-target-optspace flag; ignored" 1>&2
+    ;;
+esac
+
 skipdirs=
 gasdir=gas
 use_gnu_ld=