gcc/mkconfig.sh

   1 #! /bin/sh
   2
   3 # Copyright (C) 2001, 2002, 2006 Free Software Foundation, Inc.
   4 # This file is part of GCC.
   5
   6 # GCC is free software; you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation; either version 2, or (at your option)
   9 # any later version.
  10
  11 # GCC is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 # GNU General Public License for more details.
  15
  16 # You should have received a copy of the GNU General Public License
  17 # along with GCC; see the file COPYING.  If not, write to
  18 # the Free Software Foundation, 51 Franklin Street, Fifth Floor,
  19 # Boston MA 02110-1301, USA.
  20
  21
  22 # Generate gcc's various configuration headers:
  23 # config.h, tconfig.h, bconfig.h, tm.h, and tm_p.h.
  24 # $1 is the file to generate.  DEFINES, HEADERS, and possibly
  25 # TARGET_CPU_DEFAULT are expected to be set in the environment.
  26
  27 if [ -z "$1" ]; then
  28     echo "Usage: DEFINES='list' HEADERS='list' \\" >&2
  29     echo "  [TARGET_CPU_DEFAULT='default'] mkconfig.sh FILE" >&2
  30     exit 1
  31 fi
  32
  33 output=$1
  34 rm -f ${output}T
  35
  36 # This converts a file name into header guard macro format.
  37 hg_sed_expr='y,abcdefghijklmnopqrstuvwxyz./,ABCDEFGHIJKLMNOPQRSTUVWXYZ__,'
  38 header_guard=GCC_`echo ${output} | sed -e ${hg_sed_expr}`
  39
  40 # Add multiple inclusion protection guard, part one.
  41 echo "#ifndef ${header_guard}" >> ${output}T
  42 echo "#define ${header_guard}" >> ${output}T
  43
  44 # A special test to ensure that build-time files don't blindly use
  45 # config.h.
  46 if test x"$output" = x"config.h"; then
  47   echo "#ifdef GENERATOR_FILE" >> ${output}T
  48   echo "#error config.h is for the host, not build, machine." >> ${output}T
  49   echo "#endif" >> ${output}T
  50 fi
  51
  52 # Define TARGET_CPU_DEFAULT if the system wants one.
  53 # This substitutes for lots of *.h files.
  54 if [ "$TARGET_CPU_DEFAULT" != "" ]; then
  55     echo "#define TARGET_CPU_DEFAULT ($TARGET_CPU_DEFAULT)" >> ${output}T
  56 fi
  57
  58 # Provide defines for other macros set in config.gcc for this file.
  59 for def in $DEFINES; do
  60     echo "#ifndef $def" | sed 's/=.*//' >> ${output}T
  61     echo "# define $def" | sed 's/=/ /' >> ${output}T
  62     echo "#endif" >> ${output}T
  63 done
  64
  65 # The first entry in HEADERS may be auto-FOO.h ;
  66 # it wants to be included even when not -DIN_GCC.
  67 if [ -n "$HEADERS" ]; then
  68     set $HEADERS
  69     case "$1" in auto-* )
  70         echo "#include \"$1\"" >> ${output}T
  71         shift
  72         ;;
  73     esac
  74     if [ $# -ge 1 ]; then
  75         echo '#ifdef IN_GCC' >> ${output}T
  76         for file in "$@"; do
  77             echo "# include \"$file\"" >> ${output}T
  78         done
  79         echo '#endif' >> ${output}T
  80     fi
  81 fi
  82
  83 # If this is tm.h, now include insn-constants.h and insn-flags.h only
  84 # if IN_GCC is defined but neither GENERATOR_FILE nor USED_FOR_TARGET
  85 # is defined.  (Much of this is temporary.)
  86
  87 case $output in
  88     tm.h )
  89         cat >> ${output}T <<EOF
  90 #if defined IN_GCC && !defined GENERATOR_FILE && !defined USED_FOR_TARGET
  91 # include "insn-constants.h"
  92 # include "insn-flags.h"
  93 #endif
  94 EOF
  95     ;;
  96 esac
  97
  98 # Add multiple inclusion protection guard, part two.
  99 echo "#endif /* ${header_guard} */" >> ${output}T
 100
 101 # Avoid changing the actual file if possible.
 102 if [ -f $output ] && cmp ${output}T $output >/dev/null 2>&1; then
 103     echo $output is unchanged >&2
 104     rm -f ${output}T
 105 else
 106     mv -f ${output}T $output
 107 fi
 108
 109 # Touch a stamp file for Make's benefit.
 110 rm -f cs-$output
 111 echo timestamp > cs-$output