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 # TM_DEFINES, HEADERS, XM_DEFINES, and possibly TARGET_CPU_DEFAULT are
   6 # expected to be set in the environment.
   7
   8 if [ -z "$1" ]; then
   9     echo "Usage: TM_DEFINES='list' HEADERS='list' XM_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 # Provide defines for other target machine macros to be used everywhere.
  23 for def in $TM_DEFINES; do
  24     echo "#ifndef $def" | sed 's/=.*//' >> ${output}T
  25     echo "# define $def" | sed 's/=/ /' >> ${output}T
  26     echo "#endif" >> ${output}T
  27 done
  28
  29 # The first entry in HEADERS may be auto-host.h or auto-build.h;
  30 # it wants to be included even when not -DIN_GCC.
  31 if [ -n "$HEADERS" ]; then
  32     set $HEADERS; first=$1
  33     case $first in auto-* )
  34         echo "#include \"$first\"" >> ${output}T
  35         shift
  36         HEADERS=$*
  37         ;;
  38     esac
  39 fi
  40
  41 # Provide three core typedefs used by everything, if we are compiling
  42 # GCC.  These used to be found in rtl.h and tree.h, but this is no
  43 # longer practical. Providing these in config.h/tconfig.h/hconfig.h
  44 # rather than system.h allows the typedefs to be used anywhere in GCC.
  45 case $output in
  46     *config.h | *hconfig.h | *tconfig.h)
  47         cat >> ${output}T <<EOF
  48 #ifdef IN_GCC
  49 /* Provide three core typedefs used by everything, if we are compiling
  50    GCC.  These used to be found in rtl.h and tree.h, but this is no
  51    longer practical.  Providing these here rather that system.h allows
  52    the typedefs to be used everywhere within GCC. */
  53 struct rtx_def;
  54 typedef struct rtx_def *rtx;
  55 struct rtvec_def;
  56 typedef struct rtvec_def *rtvec;
  57 union tree_node;
  58 typedef union tree_node *tree;
  59 #endif
  60 #define GTY(x)
  61 EOF
  62         ;;
  63 esac
  64
  65 if [ -n "$HEADERS" ]; then
  66     echo '#ifdef IN_GCC' >> ${output}T
  67     for file in $HEADERS; do
  68         echo "# include \"$file\"" >> ${output}T
  69     done
  70     echo '#endif' >> ${output}T
  71 fi
  72
  73 for def in $XM_DEFINES; do
  74     echo "#ifndef $def" | sed 's/=.*//' >> ${output}T
  75     echo "# define $def" | sed 's/=/ /' >> ${output}T
  76     echo "#endif" >> ${output}T
  77 done
  78
  79 # If this is tm_p.h, include tm-preds.h unconditionally.
  80 # If this is tconfig.h or hconfig.h, include no more files.
  81 # Otherwise, include insn-constants.h and insn-flags.h,
  82 # but only if GENERATOR_FILE is not defined.
  83 case $output in
  84     *tm_p.h)
  85         echo "#include \"tm-preds.h\"" >> ${output}T
  86     ;;
  87     *tconfig.h | *hconfig.h)
  88     ;;
  89     *)
  90         cat >> ${output}T <<EOF
  91 #ifndef GENERATOR_FILE
  92 # include "insn-constants.h"
  93 # include "insn-flags.h"
  94 #endif
  95 EOF
  96     ;;
  97 esac
  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