uhd

dnl Autoconf support for C++

dnl Copyright (C) 1988 Eleftherios Gkioulekas <lf@amath.washington.edu>

dnl  

dnl This program is free software; you can redistribute it and/or modify

dnl it under the terms of the GNU General Public License as published by

dnl the Free Software Foundation; either version 3 of the License, or

dnl (at your option) any later version.

dnl 

dnl This program is distributed in the hope that it will be useful,

dnl but WITHOUT ANY WARRANTY; without even the implied warranty of

dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

dnl GNU General Public License for more details.

dnl 

dnl You should have received a copy of the GNU General Public License

dnl along with this program; if not, write to the Free Software 

dnl Foundation, Inc., 51 Franklin Street, Boston, MA 02110-1301, USA.

dnl 

dnl As a special exception to the GNU General Public License, if you 

dnl distribute this file as part of a program that contains a configuration 

dnl script generated by Autoconf, you may include it under the same 

dnl distribution terms that you use for the rest of that program.

# -----------------------------------------------------------------

# This macro should be called to configure your C++ compiler.

# When called, the macro does the following things:

# 1. It finds an appropriate C++ compiler

#    If you passed the flag --with-cxx=foo, then it uses that

#    particular compiler

# 2. Checks whether the compiler accepts the -g 

# ------------------------------------------------------------------

AC_DEFUN([LF_CONFIGURE_CXX],[

 AC_REQUIRE([AC_PROG_CXX])dnl

 AC_REQUIRE([AC_PROG_CXXCPP])dnl

 LF_CXX_PORTABILITY

])

# -----------------------------------------------------------------------

# This macro tests the C++ compiler for various portability problem.

# -----------------------------------------------------------------------

AC_DEFUN([LF_CXX_PORTABILITY],[

  dnl

  dnl Check for common C++ portability problems

  dnl

  dnl AC_LANG_PUSH

  dnl AC_LANG_CPLUSPLUS

  AC_LANG_SAVE

  AC_LANG_CPLUSPLUS

  dnl Test whether C++ has std::isnan

  AC_MSG_CHECKING(whether C++ has std::isnan)

  AC_TRY_COMPILE([#include <cmath>], [

   std::isnan(0);

], [ AC_MSG_RESULT(yes)

	AC_DEFINE(CXX_HAS_STD_ISNAN,[],[Define if has std::isnan]) ],

   [ AC_MSG_RESULT(no) ])

  dnl Done with the portability checks

  dnl AC_LANG_POP([C++])

  AC_LANG_RESTORE

])