complex: make _Complex_I work with gcc -std=c99 -pedantic-errors

diff --git a/include/complex.h b/include/complex.h
index 436f32f49c77fcb424cbb776be2872810c6b67e8..b4bcb22efc818d05a294bf86e7bb178ea986dbb8 100644 (file)
--- a/include/complex.h
+++ b/include/complex.h
@@ -6,7 +6,11 @@ extern "C" {
 #endif
 
 #define complex _Complex
+#ifdef __GNUC__
+#define _Complex_I (__extension__ 1.0fi)
+#else
 #define _Complex_I 1.0fi
+#endif
 #define I _Complex_I
 
 double complex cacos(double complex);