aclocal.m4

   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 ])