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30 lines
1.2 KiB
30 lines
1.2 KiB
dnl Copyright (C) 2004-2017 Julien Pommier
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dnl
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dnl This file is free software; you can redistribute it and/or modify it
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dnl under the terms of the GNU Lesser General Public License as published
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dnl by the Free Software Foundation; either version 3 of the License, or
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dnl (at your option) any later version along with the GCC Runtime Library
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dnl Exception either version 3.1 or (at your option) any later version.
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dnl This program is distributed in the hope that it will be useful, but
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dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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dnl License and GCC Runtime Library Exception for more details.
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dnl You should have received a copy of the GNU Lesser General Public License
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dnl along with this program; if not, write to the Free Software Foundation,
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dnl Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
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AC_DEFUN([AC_CHECK_CXX_FLAG],
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[AC_MSG_CHECKING([whether ${CXX} accepts $1])
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echo 'int main(){}' > conftest.c
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if test -z "`${CXX} $1 -o conftest conftest.c 2>&1`"; then
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$2="${$2} $1"
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echo "yes"
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else
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echo "no"
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$3
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fi
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dnl echo "$2=${$2}"
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rm -f conftest*
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])
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