1# gc.m4 serial 13
2dnl Copyright (C) 2005-2021 Free Software Foundation, Inc.
3dnl This file is free software; the Free Software Foundation
4dnl gives unlimited permission to copy and/or distribute it,
5dnl with or without modifications, as long as this notice is preserved.
6
7AC_DEFUN([gl_GC],
8[
9  AC_ARG_WITH([libgcrypt],
10    AS_HELP_STRING([--with-libgcrypt], [use libgcrypt for low-level crypto]),
11    libgcrypt=$withval, libgcrypt=no)
12  if test "$libgcrypt" != no; then
13    # gc-libgcrypt.c will fail on startup if we don't have
14    # version 1.4.4 or later, so test for it early. */
15    gl_good_gcrypt=no
16    AM_PATH_LIBGCRYPT([1.4.4], [gl_good_gcrypt=yes],
17      [AC_MSG_ERROR([libgcrypt is too old])])
18    if test "x$gl_good_gcrypt" != xno; then
19      dnl Ignore the value of LIBGCRYPT_LIBS, because it does not include
20      dnl '-lgpg-error'.
21      AC_LIB_HAVE_LINKFLAGS([gcrypt], [gpg-error], [#include <gcrypt.h>])
22      LIB_CRYPTO="$LIBGCRYPT"
23    else
24      AC_MSG_ERROR([libgcrypt not found])
25    fi
26  fi
27  AC_SUBST([LIB_CRYPTO])
28
29  AC_REQUIRE([AC_C_RESTRICT])
30])
31