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| author | Florian Weimer <fweimer@redhat.com> | 2017-08-11 15:36:08 +0200 |
|---|---|---|
| committer | Florian Weimer <fweimer@redhat.com> | 2017-08-11 15:36:08 +0200 |
| commit | 8b2c63e4e2ad1fd161f80004ed30624f2a37b57b (patch) | |
| tree | d83ca4b23f6813e201bcf31d5ac51e4f43a95bf3 | |
| parent | 86c6519ee77d241575653206f33dbe1d4c8436cf (diff) | |
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assert: Suppress pedantic warning caused by statement expression
| -rw-r--r-- | ChangeLog | 7 | ||||
| -rw-r--r-- | assert/assert.h | 12 |
2 files changed, 16 insertions, 3 deletions
@@ -1,3 +1,10 @@ +2017-08-11 Florian Weimer <fweimer@redhat.com> + + [BZ #21242] + * assert/assert.h [__GNUC__ && !__STRICT_ANSI__] (assert): + Suppress pedantic warning resulting from statement expression. + (__ASSERT_FUNCTION): Add missing __extension__. + 2017-08-11 Siddhesh Poyarekar <siddhesh@sourceware.org> * benchtests/bench-memmove-large.c: Print output in JSON diff --git a/assert/assert.h b/assert/assert.h index 22f019537c..6801cfeb10 100644 --- a/assert/assert.h +++ b/assert/assert.h @@ -91,13 +91,19 @@ __END_DECLS ? __ASSERT_VOID_CAST (0) \ : __assert_fail (#expr, __FILE__, __LINE__, __ASSERT_FUNCTION)) # else +/* The first occurrence of EXPR is not evaluated due to the sizeof, + but will trigger any pedantic warnings masked by the __extension__ + for the second occurrence. The explicit comparison against zero is + required to support function pointers and bit fields in this + context, and to suppress the evaluation of variable length + arrays. */ # define assert(expr) \ - ({ \ + ((void) sizeof ((expr) == 0), __extension__ ({ \ if (expr) \ ; /* empty */ \ else \ __assert_fail (#expr, __FILE__, __LINE__, __ASSERT_FUNCTION); \ - }) + })) # endif # ifdef __USE_GNU @@ -113,7 +119,7 @@ __END_DECLS C9x has a similar variable called __func__, but prefer the GCC one since it demangles C++ function names. */ # if defined __cplusplus ? __GNUC_PREREQ (2, 6) : __GNUC_PREREQ (2, 4) -# define __ASSERT_FUNCTION __PRETTY_FUNCTION__ +# define __ASSERT_FUNCTION __extension__ __PRETTY_FUNCTION__ # else # if defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L # define __ASSERT_FUNCTION __func__ |