gcc/mkconfig.sh

   1 #! /bin/sh
   2
   3 # Copyright (C) 2001, 2002, 2006, 2007, 2010, 2011
   4 # Free Software Foundation, Inc.
   5 # This file is part of GCC.
   6
   7 # GCC is free software; you can redistribute it and/or modify
   8 # it under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation; either version 3, or (at your option)
  10 # any later version.
  11
  12 # GCC is distributed in the hope that it will be useful,
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 # GNU General Public License for more details.
  16
  17 # You should have received a copy of the GNU General Public License
  18 # along with GCC; see the file COPYING3.  If not see
  19 # <http://www.gnu.org/licenses/>.
  20
  21
  22 # Generate gcc's various configuration headers:
  23 # config.h, tconfig.h, bconfig.h, tm.h, libgcc_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" >> ${output}T
  63 done
  64
  65 # The first entry in HEADERS may be auto-FOO.h ;
  66 # it wants to be included even when not -DIN_GCC.
  67 # Postpone including defaults.h until after the insn-*
  68 # headers, so that the HAVE_* flags are available
  69 # when defaults.h gets included.
  70 postpone_defaults_h="no"
  71 if [ -n "$HEADERS" ]; then
  72     set $HEADERS
  73     case "$1" in auto-* )
  74         echo "#include \"$1\"" >> ${output}T
  75         shift
  76         ;;
  77     esac
  78     if [ $# -ge 1 ]; then
  79         echo '#ifdef IN_GCC' >> ${output}T
  80         for file in "$@"; do
  81             if test x"$file" = x"defaults.h"; then
  82                 postpone_defaults_h="yes"
  83             else
  84                 echo "# include \"$file\"" >> ${output}T
  85             fi
  86         done
  87         echo '#endif' >> ${output}T
  88     fi
  89 fi
  90
  91 # If this is tm.h, now include insn-flags.h only if IN_GCC is defined
  92 # but neither GENERATOR_FILE nor USED_FOR_TARGET is defined.  Also
  93 # include libgcc_tm.h if USED_FOR_TARGET is defined.  (Much of this is
  94 # temporary.)
  95
  96 case $output in
  97     tm.h )
  98         cat >> ${output}T <<EOF
  99 #if defined IN_GCC && !defined GENERATOR_FILE && !defined USED_FOR_TARGET
 100 # include "insn-flags.h"
 101 #endif
 102 #ifdef USED_FOR_TARGET
 103 # include "libgcc_tm.h"
 104 #endif
 105 EOF
 106     ;;
 107 esac
 108
 109 # If we postponed including defaults.h, add the #include now.
 110 if test x"$postpone_defaults_h" = x"yes"; then
 111     echo "# include \"defaults.h\"" >> ${output}T
 112 fi
 113
 114 # Add multiple inclusion protection guard, part two.
 115 echo "#endif /* ${header_guard} */" >> ${output}T
 116
 117 # Avoid changing the actual file if possible.
 118 if [ -f $output ] && cmp ${output}T $output >/dev/null 2>&1; then
 119     echo $output is unchanged >&2
 120     rm -f ${output}T
 121 else
 122     mv -f ${output}T $output
 123 fi
 124
 125 # Touch a stamp file for Make's benefit.
 126 rm -f cs-$output
 127 echo timestamp > cs-$output