gcc/mkconfig.sh

   1 #! /bin/sh
   2
   3 # Generate gcc's config.h, which is not your normal autoconf-generated
   4 # config.h (that's auto-(host|build).h).  $1 is the file to generate.
   5 # HEADERS, DEFINES, and possibly TARGET_CPU_DEFAULT are expected to be
   6 # set in the environment.
   7
   8 if [ -z "$1" ]; then
   9     echo "Usage: HEADERS='list' DEFINES='list' mkconfig.sh FILE" >&2
  10     exit 1
  11 fi
  12
  13 output=$1
  14 rm -f $output.T
  15 exec > $output.T
  16
  17 # Define TARGET_CPU_DEFAULT if the system wants one.
  18 # This substitutes for lots of *.h files.
  19 if [ "$TARGET_CPU_DEFAULT" != "" ]; then
  20     echo "#define TARGET_CPU_DEFAULT ($TARGET_CPU_DEFAULT)"
  21 fi
  22
  23 # The first entry in HEADERS may be auto-host.h or auto-build.h;
  24 # it wants to be included even when not -DIN_GCC.
  25 if [ -n "$HEADERS" ]; then
  26     set $HEADERS; first=$1
  27     case $first in auto-* )
  28         echo "#include \"$first\""
  29         shift
  30         HEADERS=$*
  31         ;;
  32     esac
  33 fi
  34
  35 if [ -n "$HEADERS" ]; then
  36     echo '#ifdef IN_GCC'
  37     for file in $HEADERS; do
  38         echo "# include \"$file\""
  39     done
  40     echo '#endif'
  41 fi
  42
  43 for def in $DEFINES; do
  44     echo "#ifndef $def"
  45     echo "# define $def"
  46     echo "#endif"
  47 done
  48
  49 # Include insn-codes.h last, because it includes machmode.h,
  50 # and we want EXTRA_CC_MODES to be taken into account.
  51 echo "#ifndef GENERATOR_FILE"
  52 echo "#include \"insn-codes.h\""
  53 echo "#endif"
  54
  55 exec >&-
  56
  57 # Avoid changing the actual file if possible.
  58 if [ -f $output ] && cmp $output.T $output; then
  59     echo $output is unchanged >&2
  60     rm -f $output.T
  61 else
  62     mv -f $output.T $output
  63 fi
  64
  65 # Touch a stamp file for Make's benefit.
  66 rm -f cs-$output
  67 echo timestamp > cs-$output