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-rw-r--r--Build/source/libs/harfbuzz/configure.ac2
1 files changed, 1 insertions, 1 deletions
diff --git a/Build/source/libs/harfbuzz/configure.ac b/Build/source/libs/harfbuzz/configure.ac
index 3e8be57c3b3..eb0f0e33cff 100644
--- a/Build/source/libs/harfbuzz/configure.ac
+++ b/Build/source/libs/harfbuzz/configure.ac
@@ -44,7 +44,7 @@ if test "x$GCC" = "xyes"; then
LDFLAGS="$LDFLAGS -Bsymbolic-functions"
# Choose C++ version
- CXXFLAGS="$CXXFLAGS -std=c++11"
+ CXXFLAGS="$CXXFLAGS -std=c++11 -D_GNU_SOURCE"
# Make sure we don't link to libstdc++
CXXFLAGS="$CXXFLAGS -fno-rtti -fno-exceptions"