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# gl-openssl.m4 serial 4
dnl Copyright (C) 2013-2020 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
AC_DEFUN([gl_SET_CRYPTO_CHECK_DEFAULT],
[
m4_define([gl_CRYPTO_CHECK_DEFAULT], [$1])
])
gl_SET_CRYPTO_CHECK_DEFAULT([no])
AC_DEFUN([gl_CRYPTO_CHECK],
[
dnl gnulib users set this before gl_INIT with gl_SET_CRYPTO_CHECK_DEFAULT()
m4_divert_once([DEFAULTS], [with_openssl_default='gl_CRYPTO_CHECK_DEFAULT'])
dnl Only clear once, so crypto routines can be checked for individually
m4_divert_once([DEFAULTS], [LIB_CRYPTO=])
AC_ARG_WITH([openssl],
[AS_HELP_STRING([--with-openssl],
[use libcrypto hash routines. Valid ARGs are:
'yes', 'no',
'auto' => use if any version available,
'auto-gpl-compat' => use if gpl compatible version available,
'optional' => use if available and warn if not available;
default is ']gl_CRYPTO_CHECK_DEFAULT['.
Note also --with-linux-crypto, which will enable
use of kernel crypto routines, which have precedence])],
[],
[with_openssl=$with_openssl_default])
if test "x$1" = xMD5; then
ALG_header=md5.h
else
ALG_header=sha.h
fi
AC_SUBST([LIB_CRYPTO])
if test "x$with_openssl" != xno; then
if test "x$with_openssl" = xauto-gpl-compat; then
AC_CACHE_CHECK([whether openssl is GPL compatible],
[gl_cv_openssl_gpl_compat],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([[
#include <openssl/opensslv.h>
#if OPENSSL_VERSION_MAJOR < 3
#error "openssl >= version 3 not found"
#endif
]])],
[gl_cv_openssl_gpl_compat=yes],
[gl_cv_openssl_gpl_compat=no])])
fi
if test "x$with_openssl" != xauto-gpl-compat ||
test "x$gl_cv_openssl_gpl_compat" = xyes; then
AC_CHECK_LIB([crypto], [$1],
[AC_CHECK_HEADERS([openssl/$ALG_header],
[LIB_CRYPTO=-lcrypto
AC_DEFINE([HAVE_OPENSSL_$1], [1],
[Define to 1 if libcrypto is used for $1.])])])
fi
if test "x$LIB_CRYPTO" = x; then
if test "x$with_openssl" = xyes; then
AC_MSG_ERROR([openssl development library not found for $1])
elif test "x$with_openssl" = xoptional; then
AC_MSG_WARN([openssl development library not found for $1])
fi
fi
fi
])
|
