Use C99-defined signbit macro

1 files changed, 0 insertions, 4 deletions

diff --git a/complex.c b/complex.c
index f0dfd2ab78..da69f9197c 100644
--- a/complex.c
+++ b/complex.c
@@ -34,10 +34,6 @@
 #else
 static VALUE RFLOAT_0;
 #endif
-#if defined(HAVE_SIGNBIT) && defined(__GNUC__) && defined(__sun) && \
-    !defined(signbit)
-extern int signbit(double);
-#endif
 
 VALUE rb_cComplex;