X-Git-Url: https://wimlib.net/git/?p=wimlib;a=blobdiff_plain;f=include%2Fwimlib%2Fcompiler.h;fp=include%2Fwimlib%2Fcompiler.h;h=fd8942f15bf025bec6aa5485fcfadc07402d2096;hp=c6e22e98d649d5cb42937eabdaf52472fb8af408;hb=8e9c6b63fcba9406cea6b742859e7730e0e2e8a9;hpb=0e26b390d9f55ce9abb0c40c551e1c478e0563ad

diff --git a/include/wimlib/compiler.h b/include/wimlib/compiler.h
index c6e22e98..fd8942f1 100644
--- a/include/wimlib/compiler.h
+++ b/include/wimlib/compiler.h
@@ -30,6 +30,7 @@
 #	define unlikely(x) __builtin_expect(!!(x), 0)
 #	define inline inline __attribute__((always_inline))
 #	define prefetch(x) __builtin_prefetch(x)
+#	define is_constant(x) __builtin_constant_p(x)
 #else
 #	define WIMLIBAPI
 #	define _always_inline_attribute inline
@@ -42,6 +43,7 @@
 #	define likely(x) (x)
 #	define unlikely(x) (x)
 #	define prefetch(x)
+#	define is_constant(x) (0)
 #endif /* __GNUC__ */
 
 #endif /* _WIMLIB_COMPILER_H */