nagios-plugins/m4/np_curl.m4

dnl These are for the libs and macros from curl
dnl Currently utilising v7.12.3

dnl We use jm_ for non Autoconf macros.
dnl m4_pattern_forbid([^np_[ABCDEFGHIJKLMNOPQRSTUVXYZ]])dnl
dnl m4_pattern_forbid([^jm_[ABCDEFGHIJKLMNOPQRSTUVXYZ]])dnl
dnl m4_pattern_forbid([^gl_[ABCDEFGHIJKLMNOPQRSTUVXYZ]])dnl

dnl These are all m4 things that need to be called
dnl Usually in coreutils' prereq.m4, but this is a subset that we need
AC_DEFUN([np_CURL],
[
  AC_REQUIRE([TYPE_SOCKLEN_T])
])

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([TYPE_SOCKLEN_T],
[
   AC_CHECK_TYPE([socklen_t], ,[
      AC_MSG_CHECKING([for socklen_t equivalent])
      AC_CACHE_VAL([curl_cv_socklen_t_equiv],
      [
         # Systems have either "struct sockaddr *" or
         # "void *" as the second argument to getpeername
         curl_cv_socklen_t_equiv=
         for arg2 in "struct sockaddr" void; do
            for t in int size_t unsigned long "unsigned long"; do
               AC_TRY_COMPILE([
                  #ifdef HAVE_SYS_TYPES_H
                  #include <sys/types.h>
                  #endif
                  #ifdef HAVE_SYS_SOCKET_H
                  #include <sys/socket.h>
                  #endif

                  int getpeername (int, $arg2 *, $t *);
               ],[
                  $t len;
                  getpeername(0,0,&len);
               ],[
                  curl_cv_socklen_t_equiv="$t"
                  break
               ])
            done
         done

         if test "x$curl_cv_socklen_t_equiv" = x; then
            AC_MSG_ERROR([Cannot find a type to use in place of socklen_t])
         fi
      ])
      AC_MSG_RESULT($curl_cv_socklen_t_equiv)
      AC_DEFINE_UNQUOTED(socklen_t, $curl_cv_socklen_t_equiv,
                        [type to use in place of socklen_t if not defined])],
      [#include <sys/types.h>
#include <sys/socket.h>])
])