diff options
| author | Sandrine Bailleux <sandrine.bailleux@arm.com> | 2015-10-14 16:00:23 +0100 |
|---|---|---|
| committer | Sandrine Bailleux <sandrine.bailleux@arm.com> | 2015-10-19 08:52:35 +0100 |
| commit | c17a4dc34c0aa449e843595319fd9380c2a753b4 (patch) | |
| tree | 95bca088ca81abaa780d0c02382402e979b3d7b3 /include/lib/cassert.h | |
| parent | a3a348993ad0a2b863f6277229423152fbed0af0 (diff) | |
Make CASSERT() macro callable from anywhere
The CASSERT() macro introduces a typedef for the sole purpose of
triggering a compilation error if the condition to check is false.
This typedef is not used afterwards. As a consequence, when the
CASSERT() macro is called from withing a function block, the compiler
complains and outputs the following error message:
error: typedef 'msg' locally defined but not used [-Werror=unused-local-typedefs]
This patch adds the "unused" attribute for the aforementioned
typedef. This silences the compiler warning and thus makes the
CASSERT() macro callable from within function blocks as well.
Change-Id: Ie36b58fcddae01a21584c48bb6ef43ec85590479
Diffstat (limited to 'include/lib/cassert.h')
| -rw-r--r-- | include/lib/cassert.h | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/include/lib/cassert.h b/include/lib/cassert.h index 0e5529dd..e8089cbb 100644 --- a/include/lib/cassert.h +++ b/include/lib/cassert.h @@ -34,9 +34,12 @@ /******************************************************************************* * Macro to flag a compile time assertion. It uses the preprocessor to generate * an invalid C construct if 'cond' evaluates to false. - * The following compilation error is triggered if the assertion fails: + * The following compilation error is triggered if the assertion fails: * "error: size of array 'msg' is negative" + * The 'unused' attribute ensures that the unused typedef does not emit a + * compiler warning. ******************************************************************************/ -#define CASSERT(cond, msg) typedef char msg[(cond) ? 1 : -1] +#define CASSERT(cond, msg) \ + typedef char msg[(cond) ? 1 : -1] __attribute__((unused)) #endif /* __CASSERT_H__ */ |