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
  16 # We used to exec > $output.T but apparently this has bugs.
  17 # Use a redirected subshell instead.
  18 (
  19
  20 # Define TARGET_CPU_DEFAULT if the system wants one.
  21 # This substitutes for lots of *.h files.
  22 if [ "$TARGET_CPU_DEFAULT" != "" ]; then
  23     echo "#define TARGET_CPU_DEFAULT ($TARGET_CPU_DEFAULT)"
  24 fi
  25
  26 # The first entry in HEADERS may be auto-host.h or auto-build.h;
  27 # it wants to be included even when not -DIN_GCC.
  28 if [ -n "$HEADERS" ]; then
  29     set $HEADERS; first=$1
  30     case $first in auto-* )
  31         echo "#include \"$first\""
  32         shift
  33         HEADERS=$*
  34         ;;
  35     esac
  36 fi
  37
  38 if [ -n "$HEADERS" ]; then
  39     echo '#ifdef IN_GCC'
  40     for file in $HEADERS; do
  41         echo "# include \"$file\""
  42     done
  43     echo '#endif'
  44 fi
  45
  46 for def in $DEFINES; do
  47     echo "#ifndef $def"
  48     echo "# define $def"
  49     echo "#endif"
  50 done
  51
  52 # Include insn-codes.h last, because it includes machmode.h,
  53 # and we want EXTRA_CC_MODES to be taken into account.
  54 echo "#ifndef GENERATOR_FILE"
  55 echo "#include \"insn-codes.h\""
  56 echo "#include \"insn-flags.h\""
  57 echo "#endif"
  58
  59 ) > $output.T
  60
  61 # Avoid changing the actual file if possible.
  62 if [ -f $output ] && cmp $output.T $output >/dev/null 2>&1; then
  63     echo $output is unchanged >&2
  64     rm -f $output.T
  65 else
  66     mv -f $output.T $output
  67 fi
  68
  69 # Touch a stamp file for Make's benefit.
  70 rm -f cs-$output
  71 echo timestamp > cs-$output