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-rw-r--r--Makefile.in6
1 files changed, 5 insertions, 1 deletions
diff --git a/Makefile.in b/Makefile.in
index 9d3d677978e..4a761096539 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -100,7 +100,11 @@ CXXFLAGS = -g -O2
LDFLAGS =
LIBCFLAGS = $(CFLAGS)
CFLAGS_FOR_BUILD = $(CFLAGS)
-CFLAGS_FOR_TARGET = $(CFLAGS)
+# During gcc bootstrap, if we use some random cc for stage1 then
+# CFLAGS will be just -g. We want to ensure that TARGET libraries
+# (which we know are built with gcc) are built with optimizations so
+# prepend -O2 when setting CFLAGS_FOR_TARGET.
+CFLAGS_FOR_TARGET = -O2 $(CFLAGS)
LDFLAGS_FOR_TARGET =
LIBCFLAGS_FOR_TARGET = $(CFLAGS_FOR_TARGET)
PICFLAG =