src/decaf/m4/check_addrinfo.m4

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dnl
dnl check_addrinfo.m4 - checks support for addrinfo structure
dnl
dnl This macro determines if the platform supports the addrinfo structure.
dnl If this platform supports addrinfo, defines HAVE_STRUCT_ADDRINFO.
dnl

AC_DEFUN([CHECK_ADDRINFO], [
    AC_MSG_CHECKING([whether struct addrinfo is defined])
    AC_TRY_COMPILE(
      [ #include <stdio.h>
        #ifdef HAVE_UNISTD_H
        # include <unistd.h>
        #endif
        #include <sys/types.h>
        #include <sys/socket.h>
        #include <netdb.h>
      ],
      [
        do {
          struct addrinfo a;
          (void) a.ai_flags;
        } while(0)
      ],
      [
        AC_MSG_RESULT(yes)
        AC_DEFINE(HAVE_STRUCT_ADDRINFO,, [define if you have struct addrinfo])
      ],
      [
        AC_MSG_RESULT(no)
      ])
])