(autoconf.info)C++ Compiler


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5.10.4 C++ Compiler Characteristics
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 -- Macro: AC_PROG_CXX ([COMPILER-SEARCH-LIST])
     Determine a C++ compiler to use.  Check whether the environment
     variable `CXX' or `CCC' (in that order) is set; if so, then set
     output variable `CXX' to its value.

     Otherwise, if the macro is invoked without an argument, then
     search for a C++ compiler under the likely names (first `g++' and
     `c++' then other names).  If none of those checks succeed, then as
     a last resort set `CXX' to `g++'.

     This macro may, however, be invoked with an optional first argument
     which, if specified, must be a blank-separated list of C++
     compilers to search for.  This just gives the user an opportunity
     to specify an alternative search list for the C++ compiler.  For
     example, if you didn't like the default order, then you could
     invoke `AC_PROG_CXX' like this:

          AC_PROG_CXX([gcc cl KCC CC cxx cc++ xlC aCC c++ g++])

     If using the GNU C++ compiler, set shell variable `GXX' to `yes'.
     If output variable `CXXFLAGS' was not already set, set it to `-g
     -O2' for the GNU C++ compiler (`-O2' on systems where G++ does not
     accept `-g'), or `-g' for other compilers.

 -- Macro: AC_PROG_CXXCPP
     Set output variable `CXXCPP' to a command that runs the C++
     preprocessor.  If `$CXX -E' doesn't work, `/lib/cpp' is used.  It
     is portable to run `CXXCPP' only on files with a `.c', `.C',
     `.cc', or `.cpp' extension.

     Some preprocessors don't indicate missing include files by the
     error status.  For such preprocessors an internal variable is set
     that causes other macros to check the standard error from the
     preprocessor and consider the test failed if any warnings have
     been reported.  However, it is not known whether such broken
     preprocessors exist for C++.

 -- Macro: AC_PROG_CXX_C_O
     Test whether the C++ compiler accepts the options `-c' and `-o'
     simultaneously, and define `CXX_NO_MINUS_C_MINUS_O', if it does
     not.


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