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-rw-r--r--newlib/libc/stdlib/wcstold.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/newlib/libc/stdlib/wcstold.c b/newlib/libc/stdlib/wcstold.c
index c57def21d..4876e119b 100644
--- a/newlib/libc/stdlib/wcstold.c
+++ b/newlib/libc/stdlib/wcstold.c
@@ -28,6 +28,7 @@ ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
*/
+#define _GNU_SOURCE
#include <stdlib.h>
#include <string.h>
#include <wchar.h>