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 # Provide three core typedefs used by everything, if we are compiling
  39 # GCC.  These used to be found in rtl.h and tree.h, but this is no
  40 # longer practical. Providing these in config.h/tconfig.h/hconfig.h
  41 # rather than system.h allows the typedefs to be used anywhere in GCC.
  42 case $output in
  43     *config.h | *hconfig.h | *tconfig.h)
  44         echo "#ifdef IN_GCC"
  45         echo "/* Provide three core typedefs used by everything, if we are compiling"
  46         echo "   GCC.  These used to be found in rtl.h and tree.h, but this is no"
  47         echo "   longer practical.  Providing these here rather that system.h allows"
  48         echo "   the typedefs to be used everywhere within GCC. */"
  49         echo "struct rtx_def;"
  50         echo "typedef struct rtx_def *rtx;"
  51         echo "struct rtvec_def;"
  52         echo "typedef struct rtvec_def *rtvec;"
  53         echo "union tree_node;"
  54         echo "typedef union tree_node *tree;"
  55         echo "#endif"
  56         ;;
  57 esac
  58
  59 if [ -n "$HEADERS" ]; then
  60     echo '#ifdef IN_GCC'
  61     for file in $HEADERS; do
  62         echo "# include \"$file\""
  63     done
  64     echo '#endif'
  65 fi
  66
  67 for def in $DEFINES; do
  68     echo "#ifndef $def" | sed 's/=.*//'
  69     echo "# define $def" | sed 's/=/ /'
  70     echo "#endif"
  71 done
  72
  73 # If this is tm_p.h, include tm-preds.h unconditionally.
  74 # If this is tconfig.h or hconfig.h, include no more files.
  75 # Otherwise, include insn-constants.h and insn-flags.h,
  76 # but only if GENERATOR_FILE is not defined.
  77 case $output in
  78     *tm_p.h)
  79         echo "#include \"tm-preds.h\""
  80     ;;
  81     *tconfig.h | *hconfig.h)
  82     ;;
  83     *)
  84         echo "#ifndef GENERATOR_FILE"
  85         echo "# include \"insn-constants.h\""
  86         echo "# include \"insn-flags.h\""
  87         echo "#endif"
  88     ;;
  89 esac
  90
  91 # Prevent obstack.c from thinking it can do i18n of its error message
  92 # when it's being linked against a build-side program.
  93 echo '#ifdef GENERATOR_FILE'
  94 echo '# undef ENABLE_NLS'
  95 echo '#endif'
  96
  97 ) > $output.T
  98
  99 # Avoid changing the actual file if possible.
 100 if [ -f $output ] && cmp $output.T $output >/dev/null 2>&1; then
 101     echo $output is unchanged >&2
 102     rm -f $output.T
 103 else
 104     mv -f $output.T $output
 105 fi
 106
 107 # Touch a stamp file for Make's benefit.
 108 rm -f cs-$output
 109 echo timestamp > cs-$output