git

1
dnl Check for socklen_t: historically on BSD it is an int, and in
2
dnl POSIX 1g it is a type of its own, but some platforms use different
3
dnl types for the argument to getsockopt, getpeername, etc.  So we
4
dnl have to test to find something that will work.
5
AC_DEFUN([TYPE_SOCKLEN_T],
6
[
7
   AC_CHECK_TYPE([socklen_t], ,[
8
      AC_MSG_CHECKING([for socklen_t equivalent])
9
      AC_CACHE_VAL([git_cv_socklen_t_equiv],
10
      [
11
         # Systems have either "struct sockaddr *" or
12
         # "void *" as the second argument to getpeername
13
         git_cv_socklen_t_equiv=
14
         for arg2 in "struct sockaddr" void; do
15
            for t in int size_t unsigned long "unsigned long"; do
16
               AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
17
                  #include <sys/types.h>
18
                  #include <sys/socket.h>
19

20
                  int getpeername (int, $arg2 *, $t *);
21
               ],[
22
                  $t len;
23
                  getpeername(0,0,&len);
24
               ])],[
25
                  git_cv_socklen_t_equiv="$t"
26
                  break 2
27
               ])
28
            done
29
         done
30

31
         if test "x$git_cv_socklen_t_equiv" = x; then
32
            AC_MSG_ERROR([Cannot find a type to use in place of socklen_t])
33
         fi
34
      ])
35
      AC_MSG_RESULT($git_cv_socklen_t_equiv)
36
      AC_DEFINE_UNQUOTED(socklen_t, $git_cv_socklen_t_equiv,
37
			[type to use in place of socklen_t if not defined])],
38
      [#include <sys/types.h>
39
#include <sys/socket.h>])
40
])
41