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-rw-r--r--lib/Makefile2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/Makefile b/lib/Makefile
index fa81bb76..06d4da93 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -33,7 +33,7 @@ ifeq ($(CC),clang)
BOOST_TOOLSET = clang
else
BOOST_TOOLSET = darwin
-BOOST_DEFINES = define=_GLIBCXX_DEBUG=1
+BOOST_DEFINES += define=_GLIBCXX_DEBUG=1
endif
#BOOST_FLAGS = --architecture=x86 --address_model=32_64
BOOST_FLAGS = --toolset=$(BOOST_TOOLSET) \