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-rw-r--r--src/mesa/main/compiler.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/mesa/main/compiler.h b/src/mesa/main/compiler.h
index 800eb83900..5557a3b5cb 100644
--- a/src/mesa/main/compiler.h
+++ b/src/mesa/main/compiler.h
@@ -358,6 +358,10 @@ static INLINE GLuint CPU_TO_LE32(GLuint x)
#define M_E (2.7182818284590452354)
#endif
+#ifndef M_LOG2E
+#define M_LOG2E (1.4426950408889634074)
+#endif
+
#ifndef ONE_DIV_LN2
#define ONE_DIV_LN2 (1.442695040888963456)
#endif