[Mesa-dev] [PATCH 1/2] mesa: add signbit() macro

[Brian Paul]

Fixes compilation failure with MSVC since 0f3ba405.
---
 src/mesa/main/imports.h |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/src/mesa/main/imports.h b/src/mesa/main/imports.h
index 81da510..4deca6a 100644
--- a/src/mesa/main/imports.h
+++ b/src/mesa/main/imports.h
@@ -145,6 +145,13 @@ static inline int isblank(int ch) { return ch == ' ' || ch == '\t'; }
 /*@}*/
 
 
+/*
+ * signbit() is a macro on Linux.  Not available on Windows.
+ */
+#ifndef signbit
+#define signbit(x) ((x) < 0.0)
+#endif
+
 
 /** single-precision inverse square root */
 static inline float
-- 
1.7.3.4