50 lines
1.6 KiB
Plaintext
50 lines
1.6 KiB
Plaintext
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# mhd.m4
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# This file is part of TALER
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# Copyright (C) 2022 Taler Systems SA
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#
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# TALER is free software; you can redistribute it and/or modify it under the
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# terms of the GNU General Public License as published by the Free Software
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# Foundation; either version 3, or (at your option) any later version.
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#
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# TALER is distributed in the hope that it will be useful, but WITHOUT ANY
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# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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# A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License along with
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# TALER; see the file COPYING. If not, If not, see <http://www.gnu.org/license>
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# serial 1
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dnl MHD_VERSION_AT_LEAST([VERSION])
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dnl
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dnl Check that microhttpd.h can be used to build a program that prints out
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dnl the MHD_VERSION tuple in X.Y.Z format, and that X.Y.Z is greater or equal
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dnl to VERSION. If not, display message and cause the configure script to
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dnl exit failurefully.
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dnl
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dnl This uses AX_COMPARE_VERSION to do the job.
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dnl It sets shell var mhd_cv_version, as well.
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dnl
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AC_DEFUN([MHD_VERSION_AT_LEAST],
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[AC_CACHE_CHECK([libmicrohttpd version],[mhd_cv_version],
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[AC_LINK_IFELSE([AC_LANG_PROGRAM([[
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#include <stdio.h>
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#include <microhttpd.h>
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]],[[
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int v = MHD_VERSION;
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printf ("%x.%x.%x\n",
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(v >> 24) & 0xff,
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(v >> 16) & 0xff,
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(v >> 8) & 0xff);
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]])],
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[mhd_cv_version=$(./conftest)],
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[mhd_cv_version=0])])
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AX_COMPARE_VERSION([$mhd_cv_version],[ge],[$1],,
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[AC_MSG_ERROR([[
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***
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*** You need libmicrohttpd >= $1 to build this program.
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*** ]])])])
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# mhd.m4 ends here
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