source: trunk/build_support/yat_add_flag.m4 @ 1503

## $Id: yat_add_flag.m4 1503 2008-09-16 15:43:57Z peter $

# SYNOPSIS
#
#   YAT_CPP_ADD_FLAG([FLAGS], [FLAG])
#
#   YAT_CXX_ADD_FLAG([FLAGS], [FLAG])
#
#   YAT_LD_ADD_FLAG([FLAGS], [FLAG])
#
# DESCRIPTION
#
#   Check that FLAG is not already included in FLAGS and test that
#   FLAG is supported by C++ compiler. If true FLAG is appended to
#   FLAGS.
#
# LAST MODIFICATION
#
#   $Date$
#
# COPYLEFT
#
#   Copyright (C) 2008 Peter Johansson
#
#   This file is part of the yat library, http://dev.thep.lu.se/yat
#
#   The yat library is free software; you can redistribute it and/or
#   modify it under the terms of the GNU General Public License as
#   published by the Free Software Foundation; either version 3 of the
#   License, or (at your option) any later version.
#
#   The yat library is distributed in the hope that it will be useful,
#   but WITHOUT ANY WARRANTY; without even the implied warranty of
#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
#   General Public License for more details.
#
#   You should have received a copy of the GNU General Public License
#   along with yat. If not, see <http://www.gnu.org/licenses/>.
#

#
# serial 0  
#
# see http://www.gnu.org/software/automake/manual/automake.html#Serials

AC_DEFUN([YAT_CPP_ADD_FLAG],
[
  AC_REQUIRE([AX_CXXCPP_CHECK_FLAG])
  YAT_FIND_STR([$1], [$2], , [AX_CXXCPP_CHECK_FLAG([$2], ,, [$1="$$1 $2"])])
]) # YAT_CPP_ADD_FLAG


AC_DEFUN([YAT_CXX_ADD_FLAG],
[
  AC_REQUIRE([AX_CXX_CHECK_FLAG])
  YAT_FIND_STR([$1], [$2], , [AX_CXX_CHECK_FLAG([$2], ,, [$1="$$1 $2"])])
]) # YAT_CXX_ADD_FLAG

AC_DEFUN([YAT_LD_ADD_FLAG],
[
  AC_REQUIRE([AX_LD_CHECK_FLAG])
  YAT_FIND_STR([$1], [$2], , [AX_LD_CHECK_FLAG([$2], ,, [$1="$$1 $2"])])
]) # YAT_LD_ADD_FLAG

AC_DEFUN([YAT_FIND_STR],
[
  # YAT_FIND_STR
  found=no;       
  for a in $1; do 
    if test "$f" = "$2"; then
      found=yes;
    fi
  done



  # ACTION
  if test "$found" = "yes" ; then
    ifelse([$3], , :, [$3])
  else
    ifelse([$4], , :, [$4])
  fi  

]) # YAT_FIND_STR