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-rw-r--r--icepack/icepack.cc2
1 files changed, 2 insertions, 0 deletions
diff --git a/icepack/icepack.cc b/icepack/icepack.cc
index 3b09936..4eb0305 100644
--- a/icepack/icepack.cc
+++ b/icepack/icepack.cc
@@ -16,6 +16,8 @@
// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
//
+#define _GNU_SOURCE
+
#include <set>
#include <tuple>
#include <vector>