summaryrefslogtreecommitdiff
path: root/openvpn/m4/ax_socklen_t.m4
diff options
context:
space:
mode:
Diffstat (limited to 'openvpn/m4/ax_socklen_t.m4')
-rw-r--r--openvpn/m4/ax_socklen_t.m465
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
+ ]]
+ )
+])