Check if restrict is supported by the compiler and remove hack

configure.ac

@@ -54,6 +54,9 @@ AC_USE_SYSTEM_EXTENSIONS
 AX_COMPILER_VENDOR
 AX_COMPILER_VERSION
 
+#  Restrict support.
+AC_C_RESTRICT
+
 # Interprocedural optimization support. Needs special handling for linking and
 # archiving as well as compilation with Intels, needs to be done before
 # libtool is configured (to use correct LD).

src/inline.h

@@ -29,7 +29,6 @@
 #ifndef INLINE
 #ifdef __cplusplus
 #define INLINE inline
-#define restrict
 #else
 #if __GNUC__ && !__GNUC_STDC_INLINE__
 #define INLINE extern inline