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Annotation of gcc/config/linux.h, revision 1.1.1.1

1.1       root        1: /* Definitions for Linux with ELF format
                      2:    Copyright (C) 1995 Free Software Foundation, Inc.
                      3:    Contributed by Eric Youngdale.
                      4:    Modified for stabs-in-ELF by H.J. Lu.
                      5: 
                      6: This file is part of GNU CC.
                      7: 
                      8: GNU CC is free software; you can redistribute it and/or modify
                      9: it under the terms of the GNU General Public License as published by
                     10: the Free Software Foundation; either version 2, or (at your option)
                     11: any later version.
                     12: 
                     13: GNU CC is distributed in the hope that it will be useful,
                     14: but WITHOUT ANY WARRANTY; without even the implied warranty of
                     15: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     16: GNU General Public License for more details.
                     17: 
                     18: You should have received a copy of the GNU General Public License
                     19: along with GNU CC; see the file COPYING.  If not, write to
                     20: the Free Software Foundation, 59 Temple Place - Suite 330,
                     21: Boston, MA 02111-1307, USA.  */
                     22: 
                     23: /* Don't assume anything about the header files. */
                     24: #define NO_IMPLICIT_EXTERN_C
                     25: 
                     26: #undef HAVE_ATEXIT
                     27: #define HAVE_ATEXIT
                     28: 
                     29: /* Linux uses ctype from glibc.a. I am not sure how complete it is.
                     30:    For now, we play safe. It may change later. */
                     31: 
                     32: #if 0
                     33: #undef MULTIBYTE_CHARS
                     34: #define MULTIBYTE_CHARS 1
                     35: #endif
                     36: 
                     37: /* There are conflicting reports about whether this system uses
                     38:    a different assembler syntax.  [email protected] says # is right.  */
                     39: #undef COMMENT_BEGIN
                     40: #define COMMENT_BEGIN "#"
                     41: 
                     42: #undef ASM_APP_ON
                     43: #define ASM_APP_ON "#APP\n"
                     44: 
                     45: #undef ASM_APP_OFF
                     46: #define ASM_APP_OFF "#NO_APP\n"
                     47: 
                     48: /* Use stabs instead of DWARF debug format.  */
                     49: #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
                     50: #include "svr4.h"
                     51: 
                     52: #undef MD_EXEC_PREFIX
                     53: #undef MD_STARTFILE_PREFIX
                     54: 
                     55: /* Output at beginning of assembler file.  */
                     56: /* The .file command should always begin the output.  */
                     57: #undef ASM_FILE_START
                     58: #define ASM_FILE_START(FILE)                                           \
                     59:   do {                                                                 \
                     60:        output_file_directive (FILE, main_input_filename);              \
                     61:        fprintf (FILE, "\t.version\t\"01.01\"\n");                      \
                     62:   } while (0)
                     63: 
                     64: #undef LIBGCC_SPEC
                     65: #define LIBGCC_SPEC \
                     66:   "%{!shared:-lgcc}"
                     67: 
                     68: 
                     69: /* Provide a STARTFILE_SPEC appropriate for Linux.  Here we add
                     70:    the Linux magical crtbegin.o file (see crtstuff.c) which
                     71:    provides part of the support for getting C++ file-scope static
                     72:    object constructed before entering `main'. */
                     73:    
                     74: #undef STARTFILE_SPEC
                     75: #define STARTFILE_SPEC \
                     76:   "%{!shared: \
                     77:      %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} %{!p:crt1.o%s}}}\
                     78:    crti.o%s %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
                     79: 
                     80: /* Provide a ENDFILE_SPEC appropriate for Linux.  Here we tack on
                     81:    the Linux magical crtend.o file (see crtstuff.c) which
                     82:    provides part of the support for getting C++ file-scope static
                     83:    object constructed before entering `main', followed by a normal
                     84:    Linux "finalizer" file, `crtn.o'.  */
                     85: 
                     86: #undef ENDFILE_SPEC
                     87: #define ENDFILE_SPEC \
                     88:   "%{!shared:crtend.o%s} %{shared:crtendS.o%s} crtn.o%s"

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