+#undef offsetof
+#ifdef __compiler_offsetof
+#define offsetof(TYPE,MEMBER) __compiler_offsetof(TYPE,MEMBER)
+#else
+#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
+#endif
+
+#define container_of(ptr, type, member) ({ \
+ const typeof( ((type *)0)->member ) *__mptr = (ptr); \
+ (type *)( (char *)__mptr - offsetof(type,member) );})
+
+struct foo {
+ int a, b;
+};
+
+int main(int argc, char **argv)
+{
+ _Static_assert(offsetof(struct foo, a) == 0 , "Check");
+ return 0 ;
+}
+EOF
+if compile_prog "" "" "static_assert"; then
+ static_assert="yes"
+fi
+echo "Static Assert $static_assert"
+
+##########################################
+# Check whether we have bool / stdbool.h
+have_bool="no"
+cat > $TMPC << EOF
+#include <stdbool.h>