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-rw-r--r--osdep/compiler.h10
1 files changed, 7 insertions, 3 deletions
diff --git a/osdep/compiler.h b/osdep/compiler.h
index 7c9f859f3a..f5658979e3 100644
--- a/osdep/compiler.h
+++ b/osdep/compiler.h
@@ -6,9 +6,13 @@
#ifdef __GNUC__
#define PRINTF_ATTRIBUTE(a1, a2) __attribute__ ((format(printf, a1, a2)))
#define MP_NORETURN __attribute__((noreturn))
+#define MP_FALLTHROUGH __attribute__((fallthrough))
+#define MP_WARN_UNUSED_RESULT __attribute__((warn_unused_result))
#else
#define PRINTF_ATTRIBUTE(a1, a2)
#define MP_NORETURN
+#define MP_FALLTHROUGH do {} while (0)
+#define MP_WARN_UNUSED_RESULT
#endif
// Broken crap with __USE_MINGW_ANSI_STDIO
@@ -17,10 +21,10 @@
#define PRINTF_ATTRIBUTE(a1, a2) __attribute__ ((format (gnu_printf, a1, a2)))
#endif
-#if __STDC_VERSION__ >= 201112L
-#include <stdalign.h>
+#ifdef __GNUC__
+#define MP_ASSERT_UNREACHABLE() (assert(!"unreachable"), __builtin_unreachable())
#else
-#define alignof(x) (offsetof(struct {char unalign_; x u;}, u))
+#define MP_ASSERT_UNREACHABLE() (assert(!"unreachable"), abort())
#endif
#endif