diff options
Diffstat (limited to 'openvpn/m4/ax_socklen_t.m4')
| -rw-r--r-- | openvpn/m4/ax_socklen_t.m4 | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/openvpn/m4/ax_socklen_t.m4 b/openvpn/m4/ax_socklen_t.m4 new file mode 100644 index 00000000..cd7cad8a --- /dev/null +++ b/openvpn/m4/ax_socklen_t.m4 @@ -0,0 +1,65 @@ +dnl -- The following is base of curl's acinclude.m4 -- +dnl Check for socklen_t: historically on BSD it is an int, and in +dnl POSIX 1g it is a type of its own, but some platforms use different +dnl types for the argument to getsockopt, getpeername, etc. So we +dnl have to test to find something that will work. +AC_DEFUN([AX_TYPE_SOCKLEN_T], [ + AC_CHECK_TYPE( + [socklen_t], + , + [ + AS_VAR_PUSHDEF([VAR],[ax_cv_socklen_t_equiv])dnl + AC_CACHE_CHECK( + [for socklen_t equivalent], + [VAR], + [ + #AS_CASE is not supported on <autoconf-2.60 + case "${host}" in + *-mingw*) VAR=int ;; + *) + # Systems have either "struct sockaddr *" or + # "void *" as the second argument to getpeername + for arg2 in "struct sockaddr" void; do + for t in int size_t unsigned long "unsigned long"; do + AC_COMPILE_IFELSE( + [AC_LANG_PROGRAM( + [[ +#include <sys/types.h> +#include <sys/socket.h> +int getpeername (int, $arg2 *, $t *); + ]], + [[ +$t len; +getpeername(0,0,&len); + ]] + )], + [VAR="$t"; break] + ) + done + test -n "$VAR" && break + done + ;; + esac + ] + AS_VAR_IF( + [VAR], + [], + [AC_MSG_ERROR([Cannot find a type to use in place of socklen_t])], + [AC_DEFINE_UNQUOTED( + [socklen_t], + [$VAR], + [type to use in place of socklen_t if not defined] + )] + ) + ) + ], + [[ +#include <sys/types.h> +#ifdef WIN32 +#include <ws2tcpip.h> +#else +#include <sys/socket.h> +#endif + ]] + ) +]) |