On 7-Aug-2007, Joshua Hoblitt wrote: | Is there a pre-canned AC macro or other reliable means of testing for | compiler attributes? | | I have an awful lot of code that looks something like this: | | void *myfunc(char *myvar | #ifdef __GNUC__ | ) __attribute__((malloc)); | # else // ifdef __GNUC__ | ); | #endif // ifdef __GNUC__ | | and it has to the potential to get a lot worse if I have to start testing | for what version of GNUC we have to use a new attribute. Ugh. Don't do it like that. Instead, write something like your-config-header.h: -------------------- #ifdef __GNUC__ #define ATTR_MALLOC __attribute__((malloc)) #else #define ATTR_MALLOC #endif and then in your code, just use #include "your-config-header.h" ... void *myfunc (char *myvar) ATTR_MALLOC; You may still want some autoconf macros to check whether the attributes are supported, but with this style it won't be so messy since the cpp #ifdefs only have to appear in one place. jwe _______________________________________________ Autoconf mailing list Autoconf@xxxxxxx http://lists.gnu.org/mailman/listinfo/autoconf
