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Diffstat (limited to 'gsm-receiver/config/lf_cxx.m4')
| -rw-r--r-- | gsm-receiver/config/lf_cxx.m4 | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/gsm-receiver/config/lf_cxx.m4 b/gsm-receiver/config/lf_cxx.m4 new file mode 100644 index 0000000..c581c9b --- /dev/null +++ b/gsm-receiver/config/lf_cxx.m4 @@ -0,0 +1,121 @@ +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. +# 1. Defines CXX_HAS_NO_BOOL if the compiler does not support the bool +# data type +# 2. Defines CXX_HAS_BUGGY_FOR_LOOPS if the compiler has buggy +# scoping for the for-loop +# 3. Defines USE_ASSERT if the user wants to use assertions +# ----------------------------------------------------------------------- + + +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 Check whether we have bool + AC_MSG_CHECKING(whether C++ has bool) + AC_TRY_RUN([main() { bool b1=true; bool b2=false; }], + [ AC_MSG_RESULT(yes) ], + [ AC_MSG_RESULT(no) + AC_DEFINE(CXX_HAS_NO_BOOL,[],[Define if C++ is missing bool type]) ], + [ AC_MSG_WARN(Don't cross-compile)] + ) + + dnl Test whether C++ has buggy for-loops + AC_MSG_CHECKING(whether C++ has buggy scoping in for-loops) + AC_TRY_COMPILE([#include <iostream.h>], [ + for (int i=0;i<10;i++) { } + for (int i=0;i<10;i++) { } +], [ AC_MSG_RESULT(no) ], + [ AC_MSG_RESULT(yes) + AC_DEFINE(CXX_HAS_BUGGY_FOR_LOOPS,[],[Define if for loop scoping is broken]) ]) + + dnl Test whether the user wants to enable assertions + AC_MSG_CHECKING(whether user wants assertions) + AC_ARG_ENABLE(assert, + [ --disable-assert don't use cpp.h assert], + [ AC_DEFINE(NDEBUG,[],[Define to disable asserts (don't doit!)]) + AC_MSG_RESULT(no) ], + [ AC_MSG_RESULT(yes) ], + ) + + 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 +]) + +AH_BOTTOM([// Workaround for compilers with buggy for-loop scoping +// That's quite a few compilers actually including recent versions of +// Dec Alpha cxx, HP-UX CC and SGI CC. +// The trivial "if" statement provides the correct scoping to the +// for loop + +#ifdef CXX_HAS_BUGGY_FOR_LOOPS +#undef for +#define for if(1) for +#endif +]) + +AH_BOTTOM([// If the C++ compiler we use doesn't have bool, then +// the following is a near-perfect work-around. +// You must make sure your code does not depend on "int" and "bool" +// being two different types, in overloading for instance. + +#ifdef CXX_HAS_NO_BOOL +#define bool int +#define true 1 +#define false 0 +#endif +]) |