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 2 of the License, or
+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,
# -----------------------------------------------------------------------
# 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_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_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
-])