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-rw-r--r--config/mt-linux2
1 files changed, 1 insertions, 1 deletions
diff --git a/config/mt-linux b/config/mt-linux
index e3f15ea..a09e6f1 100644
--- a/config/mt-linux
+++ b/config/mt-linux
@@ -1,2 +1,2 @@
# When using glibc 2 on Linux we must always use vtable thunks.
-CXXFLAGS_FOR_TARGET = $(CXXFLAGS) -fvtable-thunks
+CXXFLAGS_FOR_TARGET = $(CXXFLAGS) -fvtable-thunks -D_GNU_SOURCE