m4/gl-openssl.m4

   1 # gl-openssl.m4 serial 3
   2 dnl Copyright (C) 2013 Free Software Foundation, Inc.
   3 dnl This file is free software; the Free Software Foundation
   4 dnl gives unlimited permission to copy and/or distribute it,
   5 dnl with or without modifications, as long as this notice is preserved.
   6
   7 AC_DEFUN([gl_SET_CRYPTO_CHECK_DEFAULT],
   8 [
   9   m4_define([gl_CRYPTO_CHECK_DEFAULT], [$1])
  10 ])
  11 gl_SET_CRYPTO_CHECK_DEFAULT([no])
  12
  13 AC_DEFUN([gl_CRYPTO_CHECK],
  14 [
  15   m4_divert_once([DEFAULTS], [with_openssl_default='gl_CRYPTO_CHECK_DEFAULT'])
  16
  17   AC_ARG_WITH([openssl],
  18     [AS_HELP_STRING([--with-openssl],
  19       [use libcrypto hash routines. Valid ARGs are:
  20        'yes', 'no', 'auto' => use if available,
  21        'optional' => use if available and warn if not available;
  22        default is ']gl_CRYPTO_CHECK_DEFAULT['])],
  23     [],
  24     [with_openssl=$with_openssl_default])
  25
  26   if test "x$1" = xMD5; then
  27     ALG_header=md5.h
  28   else
  29     ALG_header=sha.h
  30   fi
  31
  32   LIB_CRYPTO=
  33   AC_SUBST([LIB_CRYPTO])
  34   if test "x$with_openssl" != xno; then
  35     AC_CHECK_LIB([crypto], [$1],
  36       [AC_CHECK_HEADERS([openssl/$ALG_header],
  37          [LIB_CRYPTO=-lcrypto
  38           AC_DEFINE([HAVE_OPENSSL_$1], [1],
  39             [Define to 1 if libcrypto is used for $1.])])])
  40     if test "x$LIB_CRYPTO" = x; then
  41       if test "x$with_openssl" = xyes; then
  42         AC_MSG_ERROR([openssl development library not found for $1])
  43       elif test "x$with_openssl" = xoptional; then
  44         AC_MSG_WARN([openssl development library not found for $1])
  45       fi
  46     fi
  47   fi
  48 ])