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