Svante Signell, le Tue 22 Apr 2014 22:19:06 +0200, a écrit :
> @@ -197,7 +197,7 @@
> AC_COMPILE_IFELSE(
> [AC_LANG_PROGRAM([[#include <netinet/in.h>]],
> [[struct group_req gr;
> -gr.gr_interface = 0;]])],
> +gr.gr_interface = 0; #ifndef MCAST_JOIN_GROUP; return -1; #else return 0;
> #endif]])],
Err, that will just always fail, #ifdef etc. have to be at the beginning
of a line. Also, AC_COMPILE_IFELSE only catches compilation issues, not
runtime issues. What you want is:
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([[#include <netinet/in.h>]],
[[struct group_req gr;
-gr.gr_interface = 0;]])],
+gr.gr_interface = 0;
+#ifndef MCAST_JOIN_GROUP
+# error no mcast
+#endif
+]])],
Samuel
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