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-rw-r--r--sysinfo/os/darwin.mk2
1 files changed, 2 insertions, 0 deletions
diff --git a/sysinfo/os/darwin.mk b/sysinfo/os/darwin.mk
index 7145f5a..f16b1f1 100644
--- a/sysinfo/os/darwin.mk
+++ b/sysinfo/os/darwin.mk
@@ -7,4 +7,6 @@ OS_IMPLIB_EXT = .invalid
OS_LIBDEF_EXT = .invalid
OS_ARCHIVE_EXT = .a
+CFLAGS_OS += -D_DARWIN_C_SOURCE
+
.PHONY: $(SHARED_IMPLIB)