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 ${output}T
  15
  16 # Define TARGET_CPU_DEFAULT if the system wants one.
  17 # This substitutes for lots of *.h files.
  18 if [ "$TARGET_CPU_DEFAULT" != "" ]; then
  19     echo "#define TARGET_CPU_DEFAULT ($TARGET_CPU_DEFAULT)" >> ${output}T
  20 fi
  21
  22 # The first entry in HEADERS may be auto-host.h or auto-build.h;
  23 # it wants to be included even when not -DIN_GCC.
  24 if [ -n "$HEADERS" ]; then
  25     set $HEADERS; first=$1
  26     case $first in auto-* )
  27         echo "#include \"$first\"" >> ${output}T
  28         shift
  29         HEADERS=$*
  30         ;;
  31     esac
  32 fi
  33
  34 # Provide three core typedefs used by everything, if we are compiling
  35 # GCC.  These used to be found in rtl.h and tree.h, but this is no
  36 # longer practical. Providing these in config.h/tconfig.h/hconfig.h
  37 # rather than system.h allows the typedefs to be used anywhere in GCC.
  38 case $output in
  39     *config.h | *hconfig.h | *tconfig.h)
  40         cat >> ${output}T <<EOF
  41 #ifdef IN_GCC
  42 /* Provide three core typedefs used by everything, if we are compiling
  43    GCC.  These used to be found in rtl.h and tree.h, but this is no
  44    longer practical.  Providing these here rather that system.h allows
  45    the typedefs to be used everywhere within GCC. */
  46 struct rtx_def;
  47 typedef struct rtx_def *rtx;
  48 struct rtvec_def;
  49 typedef struct rtvec_def *rtvec;
  50 union tree_node;
  51 typedef union tree_node *tree;
  52 #endif
  53 #define GTY(x)
  54 EOF
  55         ;;
  56 esac
  57
  58 if [ -n "$HEADERS" ]; then
  59     echo '#ifdef IN_GCC' >> ${output}T
  60     for file in $HEADERS; do
  61         echo "# include \"$file\"" >> ${output}T
  62     done
  63     echo '#endif' >> ${output}T
  64 fi
  65
  66 for def in $DEFINES; do
  67     echo "#ifndef $def" | sed 's/=.*//' >> ${output}T
  68     echo "# define $def" | sed 's/=/ /' >> ${output}T
  69     echo "#endif" >> ${output}T
  70 done
  71
  72 # If this is tm_p.h, include tm-preds.h unconditionally.
  73 # If this is tconfig.h or hconfig.h, include no more files.
  74 # Otherwise, include insn-constants.h and insn-flags.h,
  75 # but only if GENERATOR_FILE is not defined.
  76 case $output in
  77     *tm_p.h)
  78         echo "#include \"tm-preds.h\"" >> ${output}T
  79     ;;
  80     *tconfig.h | *hconfig.h)
  81     ;;
  82     *)
  83         cat >> ${output}T <<EOF
  84 #ifndef GENERATOR_FILE
  85 # include "insn-constants.h"
  86 # include "insn-flags.h"
  87 #endif
  88 EOF
  89     ;;
  90 esac
  91
  92 # Avoid changing the actual file if possible.
  93 if [ -f $output ] && cmp ${output}T $output >/dev/null 2>&1; then
  94     echo $output is unchanged >&2
  95     rm -f ${output}T
  96 else
  97     mv -f ${output}T $output
  98 fi
  99
 100 # Touch a stamp file for Make's benefit.
 101 rm -f cs-$output
 102 echo timestamp > cs-$output