Static assert macro, config sanity checks

[pdclib] / internals / _PDCLIB_aux.h

diff --git a/internals/_PDCLIB_aux.h b/internals/_PDCLIB_aux.h
index c3e38d08e38e995aa5ebc316e2fb9a9c263d98da..16e7ed86ce0353b1055da508ed65702eb0125900 100644 (file)
--- a/internals/_PDCLIB_aux.h
+++ b/internals/_PDCLIB_aux.h
@@ -1,5 +1,5 @@
-#ifndef _PDCLIB_AUX_H
-#define _PDCLIB_AUX_H
+#ifndef __PDCLIB_AUX_H
+#define __PDCLIB_AUX_H __PDCLIB_AUX_H
 
 /* Auxiliary PDCLib code <_PDCLIB_aux.h>
 
@@ -96,7 +96,7 @@
 #endif
 
 #ifdef __has_attribute
-   #define _PDCLIB_HAS_ATTRIBUTE(x) __has_builtin(x)
+   #define _PDCLIB_HAS_ATTRIBUTE(x) __has_attribute(x)
 #else
    #define _PDCLIB_HAS_ATTRIBUTE(x) (0)
 #endif
@@ -249,11 +249,18 @@
 /* Helper macros:                                                             */
 /* _PDCLIB_cc( x, y ) concatenates two preprocessor tokens without extending  */
 /* _PDCLIB_concat( x, y ) concatenates two preprocessor tokens with extending */
+/* _PDCLIB_concat3( x, y, z ) is the same for three tokens                    */
+/* _PDCLIB_static_assert( x ) provides a compile-time check mechanism         */
 /* -------------------------------------------------------------------------- */
 
 #define _PDCLIB_cc( x, y )     x ## y
 #define _PDCLIB_concat( x, y ) _PDCLIB_cc( x, y )
 #define _PDCLIB_concat3( x, y, z ) _PDCLIB_concat( _PDCLIB_concat( x, y ), z )
+#if _PDCLIB_C_VERSION >= 2011
+#define _PDCLIB_static_assert _Static_assert
+#else
+#define _PDCLIB_static_assert( e, m ) ;enum { _PDCLIB_concat( _PDCLIB_assert_, __LINE__ ) = 1 / ( !!( e ) ) }
+#endif
 
 #define _PDCLIB_symbol2value( x ) #x
 #define _PDCLIB_symbol2string( x ) _PDCLIB_symbol2value( x )