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-rw-r--r--libstdc++-v3/testsuite/Makefile.in2
1 files changed, 1 insertions, 1 deletions
diff --git a/libstdc++-v3/testsuite/Makefile.in b/libstdc++-v3/testsuite/Makefile.in
index e0e7114147d..31fa94c42cb 100644
--- a/libstdc++-v3/testsuite/Makefile.in
+++ b/libstdc++-v3/testsuite/Makefile.in
@@ -313,7 +313,7 @@ WARN_CXXFLAGS = \
# -I/-D flags to pass when compiling.
-AM_CPPFLAGS = $(GLIBCXX_INCLUDES)
+AM_CPPFLAGS = $(GLIBCXX_INCLUDES) $(CPPFLAGS)
# Generated lists of files to run. All of these names are valid make
# targets, if you wish to generate a list manually.