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| author | Joseph Myers <joseph@codesourcery.com> | 2014-11-26 20:54:16 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2014-11-26 20:54:16 +0000 |
| commit | 8915eacef88eb25ac94e6bb37b473adb326e9d1b (patch) | |
| tree | cb431216b6925c65f721537f7370830938b9b79d /include/libc-internal.h | |
| parent | f1a5a0e3c3d32bb800a0a63a0cfcd1b25a8e3d4d (diff) | |
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Avoid warnings for unused results in nscd/connections.c.
This patch avoids warnings for unused results of setuid and setgid in
nscd/connections.c using an ignore_value macro along the lines
suggested by Paul in
<https://sourceware.org/ml/libc-alpha/2014-11/msg00733.html>.
Tested for x86_64.
* include/libc-internal.h (ignore_value): New macro.
* nscd/connections.c (restart): Wrap calls to setuid and setgid
with ignore_value.
Diffstat (limited to 'include/libc-internal.h')
| -rw-r--r-- | include/libc-internal.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/libc-internal.h b/include/libc-internal.h index 78f82da58a..2ced1c17d3 100644 --- a/include/libc-internal.h +++ b/include/libc-internal.h @@ -70,4 +70,10 @@ extern void __init_misc (int, char **, char **); #define PTR_ALIGN_UP(base, size) \ ((__typeof__ (base)) ALIGN_UP ((uintptr_t) (base), (size))) +/* Ignore the value of an expression when a cast to void does not + suffice (in particular, for a call to a function declared with + attribute warn_unused_result). */ +#define ignore_value(x) \ + ({ __typeof__ (x) __ignored_value = (x); (void) __ignored_value; }) + #endif /* _LIBC_INTERNAL */ |