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      1 #! /bin/sh
      2 
      3 # Copyright (C) 2001-2022 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 3, 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 COPYING3.  If not see
     18 # <http://www.gnu.org/licenses/>.  
     19 
     20 
     21 # Generate gcc's various configuration headers:
     22 # config.h, tconfig.h, bconfig.h, tm.h, libgcc_tm.h, and tm_p.h.
     23 # $1 is the file to generate.  DEFINES, HEADERS, and possibly
     24 # TARGET_CPU_DEFAULT are expected to be set in the environment.
     25 
     26 if [ -z "$1" ]; then
     27     echo "Usage: DEFINES='list' HEADERS='list' \\" >&2
     28     echo "  [TARGET_CPU_DEFAULT='default'] mkconfig.sh FILE" >&2
     29     exit 1
     30 fi
     31 
     32 output=$1
     33 rm -f ${output}T
     34 
     35 # This converts a file name into header guard macro format.
     36 hg_sed_expr='y,abcdefghijklmnopqrstuvwxyz./,ABCDEFGHIJKLMNOPQRSTUVWXYZ__,'
     37 header_guard=GCC_`echo ${output} | sed -e ${hg_sed_expr}`
     38 
     39 # Add multiple inclusion protection guard, part one.
     40 echo "#ifndef ${header_guard}" >> ${output}T
     41 echo "#define ${header_guard}" >> ${output}T
     42 
     43 # A special test to ensure that build-time files don't blindly use
     44 # config.h.
     45 if test x"$output" = x"config.h"; then
     46   echo "#ifdef GENERATOR_FILE" >> ${output}T
     47   echo "#error config.h is for the host, not build, machine." >> ${output}T
     48   echo "#endif" >> ${output}T
     49 fi
     50 
     51 # Define TARGET_CPU_DEFAULT if the system wants one.
     52 # This substitutes for lots of *.h files.
     53 if [ "$TARGET_CPU_DEFAULT" != "" ]; then
     54     echo "#define TARGET_CPU_DEFAULT ($TARGET_CPU_DEFAULT)" >> ${output}T
     55 fi
     56 
     57 # Provide defines for other macros set in config.gcc for this file.
     58 for def in $DEFINES; do
     59     echo "#ifndef $def" | sed 's/=.*//' >> ${output}T
     60     echo "# define $def" | sed 's/=/ /' >> ${output}T
     61     echo "#endif" >> ${output}T
     62 done
     63 
     64 # The first entry in HEADERS may be auto-FOO.h ;
     65 # it wants to be included even when not -DIN_GCC.
     66 # Postpone including defaults.h until after the insn-*
     67 # headers, so that the HAVE_* flags are available
     68 # when defaults.h gets included.
     69 postpone_defaults_h="no"
     70 if [ -n "$HEADERS" ]; then
     71     set $HEADERS
     72     case "$1" in auto-* )
     73 	echo "#include \"$1\"" >> ${output}T
     74 	shift
     75 	;;
     76     esac
     77     if [ $# -ge 1 ]; then
     78 	echo '#ifdef IN_GCC' >> ${output}T
     79 	for file in "$@"; do
     80 	    if test x"$file" = x"defaults.h"; then
     81 		postpone_defaults_h="yes"
     82 	    else
     83 		echo "# include \"$file\"" >> ${output}T
     84 	    fi
     85 	done
     86 	echo '#endif' >> ${output}T
     87     fi
     88 fi
     89 
     90 # If this is tm.h, now include insn-flags.h only if IN_GCC is defined
     91 # but neither GENERATOR_FILE nor USED_FOR_TARGET is defined.  (Much of this
     92 # is temporary.)
     93 
     94 case $output in
     95     tm.h )
     96         cat >> ${output}T <<EOF
     97 #if defined IN_GCC && !defined GENERATOR_FILE && !defined USED_FOR_TARGET
     98 # include "insn-flags.h"
     99 #endif
    100 #if defined IN_GCC && !defined GENERATOR_FILE
    101 # include "insn-modes.h"
    102 #endif
    103 EOF
    104     ;;
    105 esac
    106 
    107 # If we postponed including defaults.h, add the #include now.
    108 if test x"$postpone_defaults_h" = x"yes"; then
    109     echo "# include \"defaults.h\"" >> ${output}T
    110 fi
    111 
    112 # Add multiple inclusion protection guard, part two.
    113 echo "#endif /* ${header_guard} */" >> ${output}T
    114 
    115 # Avoid changing the actual file if possible.
    116 if [ -f $output ] && cmp ${output}T $output >/dev/null 2>&1; then
    117     echo $output is unchanged >&2
    118     rm -f ${output}T
    119 else
    120     mv -f ${output}T $output
    121 fi
    122 
    123 # Touch a stamp file for Make's benefit.
    124 rm -f cs-$output
    125 echo timestamp > cs-$output
    126