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-rw-r--r--CMakeLists.txt1
1 files changed, 1 insertions, 0 deletions
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5d52b76..6a26303 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,6 +3,7 @@ project(do C)
set(CMAKE_C_STANDARD 99)
set(ASAN "Enable address analyzer" OFF)
+add_compile_definitions(_GNU_SOURCE)
if (ASAN)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fsanitize=address \