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| author | Jan Djärv <jan.h.d@swipnet.se> | 2013-09-23 09:12:01 +0200 |
|---|---|---|
| committer | Jan Djärv <jan.h.d@swipnet.se> | 2013-09-23 09:12:01 +0200 |
| commit | 8762e52438d46d81e518179e4f9bd8a939463ddb (patch) | |
| tree | 33a25414302599a9dbe3d2a4144927e128f57af1 /src/conf_post.h | |
| parent | 332153538c3268edb9154fbe29a6fdc5e012e595 (diff) | |
| download | emacs-8762e52438d46d81e518179e4f9bd8a939463ddb.tar.gz | |
Suppress some unhelpful warnings when using clang.
* configure.ac: With clang, check for and use -Wno-switch,
-Wno-tautological-constant-out-of-range-compare and -Wno-pointer-sign.
* conf_post.h(assume): Use __builtin_unreachable for clang.
* src/filelock.c (lock_file_1): Rearrange to remove compiler warning
about excess arguments to snprintf.
Diffstat (limited to 'src/conf_post.h')
| -rw-r--r-- | src/conf_post.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/conf_post.h b/src/conf_post.h index 14af38ce70b..7d4e1f43ed7 100644 --- a/src/conf_post.h +++ b/src/conf_post.h @@ -248,12 +248,20 @@ extern void _DebPrint (const char *fmt, ...); # define FLEXIBLE_ARRAY_MEMBER 1 #endif +#ifdef __clang__ +# ifndef __has_builtin +# define __has_builtin(x) 0 +# endif +#endif + /* assume(cond) tells the compiler (and lint) that a certain condition * will always hold, and that it should optimize (or check) accordingly. */ #if defined lint # define assume(cond) ((cond) ? (void) 0 : abort ()) #elif (__GNUC__ == 4 && __GNUC_MINOR__ >= 5) || __GNUC__ > 4 # define assume(cond) ((cond) || (__builtin_unreachable(), 0)) +#elif defined (__clang__) && __has_builtin (__builtin_unreachable) +# define assume(cond) ((cond) || (__builtin_unreachable(), 0)) #elif defined __MSC_VER # define assume(cond) __assume ((cond)) #else |