Hello,
although setting CFLAGS_FOR_TARGET before compiling gcc works fine,
CXXFLAGS_FOR_TARGET is ignored. I don't see any good reason for that.
I tested the patch by doing a regular bootstrap+testsuite on
x86_64-unknown-linux-gnu. I also did a non-bootstrap build where I set
CXXFLAGS_FOR_TARGET and checked that it now propagates to libstdc++ and
others.
config/ChangeLog:
2014-01-23 Marc Glisse <marc.gli...@inria.fr>
PR target/43538
* mt-gnu: Don't reset CXXFLAGS_FOR_TARGET.
--
Marc GlisseIndex: config/mt-gnu
===================================================================
--- config/mt-gnu (revision 206958)
+++ config/mt-gnu (working copy)
@@ -1 +1 @@
-CXXFLAGS_FOR_TARGET = $(CXXFLAGS) -D_GNU_SOURCE
+CXXFLAGS_FOR_TARGET += -D_GNU_SOURCE
