1 # gl-openssl.m4 serial 3
2 dnl Copyright (C) 2013-2018 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.
7 AC_DEFUN([gl_SET_CRYPTO_CHECK_DEFAULT],
9 m4_define([gl_CRYPTO_CHECK_DEFAULT], [$1])
11 gl_SET_CRYPTO_CHECK_DEFAULT([no])
13 AC_DEFUN([gl_CRYPTO_CHECK],
15 dnl gnulib users set this before gl_INIT with gl_SET_CRYPTO_CHECK_DEFAULT()
16 m4_divert_once([DEFAULTS], [with_openssl_default='gl_CRYPTO_CHECK_DEFAULT'])
18 dnl Only clear once, so crypto routines can be checked for individually
19 m4_divert_once([DEFAULTS], [LIB_CRYPTO=])
21 AC_ARG_WITH([openssl],
22 [AS_HELP_STRING([--with-openssl],
23 [use libcrypto hash routines. Valid ARGs are:
24 'yes', 'no', 'auto' => use if available,
25 'optional' => use if available and warn if not available;
26 default is ']gl_CRYPTO_CHECK_DEFAULT['.
27 Note also --with-linux-crypto, which will enable
28 use of kernel crypto routines, which have precedence])],
30 [with_openssl=$with_openssl_default])
32 if test "x$1" = xMD5; then
38 AC_SUBST([LIB_CRYPTO])
39 if test "x$with_openssl" != xno; then
40 AC_CHECK_LIB([crypto], [$1],
41 [AC_CHECK_HEADERS([openssl/$ALG_header],
43 AC_DEFINE([HAVE_OPENSSL_$1], [1],
44 [Define to 1 if libcrypto is used for $1.])])])
45 if test "x$LIB_CRYPTO" = x; then
46 if test "x$with_openssl" = xyes; then
47 AC_MSG_ERROR([openssl development library not found for $1])
48 elif test "x$with_openssl" = xoptional; then
49 AC_MSG_WARN([openssl development library not found for $1])