Mercurial > dropbear
diff configure.ac @ 1088:f2a3570b5110
Test struct existance against sizeof() operator
Instead of declaring an "unused-variable" or "unused-but-set-variable"
structure.
This avoid unexpected broken configurations when using something like:
$ ./configure CFLAGS="-Wall -Wextra -Werror"
It causes AC_COMPILE_IFELSE to fail and thus leading to a mismatch
configuration (because the CFLAGS are passed to the macro).
| author | Gaël PORTAY <gael.portay@gmail.com> |
|---|---|
| date | Sat, 02 May 2015 13:33:34 +0200 |
| parents | ca71904cf3ee |
| children | ef67b57fe438 |
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--- a/configure.ac Sat May 02 22:59:55 2015 +0800 +++ b/configure.ac Sat May 02 13:33:34 2015 +0200 @@ -265,7 +265,7 @@ #include <sys/types.h> #include <sys/socket.h> ]], - [[ struct sockaddr_storage s; ]])], + [[ if (sizeof(struct sockaddr_storage)) return 0 ]])], [ ac_cv_have_struct_sockaddr_storage="yes" ], [ ac_cv_have_struct_sockaddr_storage="no" ] ) @@ -279,7 +279,7 @@ #include <sys/types.h> #include <netinet/in.h> ]], - [[ struct sockaddr_in6 s; s.sin6_family = 0; ]])], + [[ if (sizeof(struct sockaddr_in6)) return 0 ]])], [ ac_cv_have_struct_sockaddr_in6="yes" ], [ ac_cv_have_struct_sockaddr_in6="no" ] ) @@ -293,7 +293,7 @@ #include <sys/types.h> #include <netinet/in.h> ]], - [[ struct in6_addr s; s.s6_addr[0] = 0; ]])], + [[ if (sizeof(struct in6_addr)) return 0 ]])], [ ac_cv_have_struct_in6_addr="yes" ], [ ac_cv_have_struct_in6_addr="no" ] ) @@ -308,7 +308,7 @@ #include <sys/socket.h> #include <netdb.h> ]], - [[ struct addrinfo s; s.ai_flags = AI_PASSIVE; ]])], + [[ if (sizeof(struct addrinfo)) return 0 ]])], [ ac_cv_have_struct_addrinfo="yes" ], [ ac_cv_have_struct_addrinfo="no" ] )