On 01/22/2012 04:17 AM, Vincent Torri wrote: > 2) the MinGW-w64 compiler already defines alloca in malloc.h, > that header files being included by stdlib.h because STDC_HEADERS is defined. Could you give more details about the problem? STDC_HEADERS is in the user's space, so the system stdlib.h should be unaffected by whether STDC_HEADERS is defined. Are we talking about the system's stdlib.h here, or by your own substitute for stdlib.h? If the latter, then it might be something outside the scope of the autoconf documentation. _______________________________________________ Autoconf mailing list Autoconf@xxxxxxx https://lists.gnu.org/mailman/listinfo/autoconf