compiler.c

这个是LINUX下的GDB调度工具的源码

/* This test file is part of GDB, the GNU debugger.

   Copyright 1995, 1997, 1999, 2003, 2004 Free Software Foundation, Inc.

   This program 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 2 of the License, or
   (at your option) any later version.

   This program 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 this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

   */

/* Sometimes the behavior of a test depends upon the compiler used to
   compile the test program.  A test script can call get_compiler_info
   to figure out the compiler version and test_compiler_info to test it.

   get_compiler_info runs the preprocessor on this file and then eval's
   the result.  This sets various symbols for use by test_compiler_info.

   TODO: make compiler_info a local variable for get_compiler_info and
   test_compiler_info.

   TODO: all clients should use test_compiler_info and should not
   use gcc_compiled, hp_cc_compiler, or hp_aCC_compiler.

   */

/* Note the semicolon at the end of this line.  Older versions of
   hp c++ have a bug in string preprocessing: if the last token on a
   line is a string, then the preprocessor concatenates the next line
   onto the current line and eats the newline!  That messes up TCL of
   course.  That happens with HP aC++ A.03.13, but it no longer happens
   with HP aC++ A.03.45. */

set compiler_info "unknown" ;

#if defined (__GNUC__)
#if defined (__GNUC_PATCHLEVEL__)
/* Only GCC versions >= 3.0 define the __GNUC_PATCHLEVEL__ macro.  */
set compiler_info [join {gcc __GNUC__ __GNUC_MINOR__ __GNUC_PATCHLEVEL__} -]
#else
set compiler_info [join {gcc __GNUC__ __GNUC_MINOR__ "unknown"} -]
#endif
#endif

#if defined (__HP_CXD_SPP)
/* older hp ansi c, such as A.11.01.25171.gp, defines this */
set compiler_info [join {hpcc __HP_CXD_SPP} -]
#endif

#if defined (__HP_cc)
/* newer hp ansi c, such as B.11.11.28706.gp, defines this */
set compiler_info [join {hpcc __HP_cc} -]
#endif

#if defined (__HP_aCC)
set compiler_info [join {hpacc __HP_aCC} -]
#endif