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Work around some gcc 4.4 strict-aliasing warnings

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gcc 4.4 ends up generating strict-aliasing warnings about some very common
networking socket uses that do not really result in a real problem and
cannot be easily avoided with union-based type-punning due to struct
definitions including another struct in system header files. To avoid having
to fully disable strict-aliasing warnings, provide a mechanism to hide the
typecast from aliasing for now. A cleaner solution will hopefully be found
in the future to handle these cases.
This commit is contained in:
Jouni Malinen 2009-11-04 19:49:14 +02:00
parent eb999fefcb
commit 0ae7b08691
6 changed files with 28 additions and 7 deletions
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13
src/utils/common.h
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@ -442,4 +442,17 @@ static inline int is_zero_ether_addr(const u8 *a)
#include "wpa_debug.h"
/*
* gcc 4.4 ends up generating strict-aliasing warnings about some very common
* networking socket uses that do not really result in a real problem and
* cannot be easily avoided with union-based type-punning due to struct
* definitions including another struct in system header files. To avoid having
* to fully disable strict-aliasing warnings, provide a mechanism to hide the
* typecast from aliasing for now. A cleaner solution will hopefully be found
* in the future to handle these cases.
*/
void * __hide_aliasing_typecast(void *foo);
#define aliasing_hide_typecast(a,t) (t *) __hide_aliasing_typecast((a))
#endif /* COMMON_H */