gcc/scan-types.sh

   1 #! /bin/sh
   2 # Deduce values of standard ANSI and POSIX types (e.g. size_t, pid_t).
   3 # Emits macros definitions for these, and some other types.
   4 # Intended to be used to massage the sys-protos.h file.
   5 # Expects one arg, which is the GCC source directory.
   6
   7 CC=${CC-"./xgcc -B$1/"}
   8 CPP=${CPP-`echo ${CC} -E -I"$1/"`}
   9 SED=sed
  10
  11 # Generate definitions for the standard types (such as mode_t)
  12 # compatible with those in the standard C header files.
  13 # It works by a dummy program through the C pre-processor, and then
  14 # using sed to search for typedefs in the output.
  15
  16 cat >st-dummy.c <<!EOF!
  17 #include <sys/types.h>
  18 #include <stddef.h>
  19 #include <stdarg.h>
  20 #include <stdio.h>
  21 #include <time.h>
  22 #include <signal.h>
  23 #ifdef size_t
  24 typedef size_t Xsize_t;
  25 #elif defined(__SIZE_TYPE__)
  26 typedef __SIZE_TYPE__ Xsize_t;
  27 #endif
  28 #ifdef va_list
  29 typedef va_list XXXva_list;
  30 #endif
  31 !EOF!
  32
  33 if ${CPP} st-dummy.c >TMP ; then true
  34 else
  35   echo "scan-types: could not invoke ${CPP} on st-dummy.c" 1>&2 ; exit 1
  36 fi
  37 tr '    ' ' ' <TMP >st-dummy.out
  38
  39 for TYPE in dev_t clock_t fpos_t gid_t ino_t mode_t nlink_t off_t pid_t size_t ssize_t time_t uid_t va_list int32_t uint_32_t ; do
  40     IMPORTED=`eval 'echo $'"$TYPE"`
  41     if [ -n "${IMPORTED}" ] ; then
  42         eval "$TYPE='$IMPORTED"
  43     else
  44         # Search st-dummy.out for a typedef for $TYPE, and write it out
  45         # to TMP in #define syntax.
  46         rm -f TMP
  47         ${SED} -n -e "s|.*typedef  *\(.*\) X*$TYPE *;.*|\1|w TMP" <st-dummy.out>/dev/null
  48         # Now select the first definition.
  49         if [ -s TMP ]; then
  50             # VALUE is now the typedef'd definition of $TYPE.
  51             eval "VALUE='`${SED} -e 's| *$||' -e '2,$d' <TMP`'"
  52             # Unless VALUE contains a blank, look for a typedef for it
  53             # in turn (this could be a loop, but that would be over-kill).
  54             # Ensure $VALUE is double quoted to protect cases where it
  55             # contains an asterisk and would cause filename expansion.
  56             # E.g. when va_list is "char *".
  57             if echo "$VALUE" | grep " " >/dev/null ; then true
  58             else
  59                 rm -f TMP
  60                 ${SED} -n -e "s|.*typedef[      ][      ]*\(.*[^a-zA-Z0-9_]\)${VALUE}[  ]*;.*|\1|w TMP" <st-dummy.out>/dev/null
  61                 if [ -s TMP ]; then
  62                     eval "VALUE='`${SED} -e '2,$d' -e 's|[      ]*$||' <TMP`'"
  63                 fi
  64             fi
  65             eval "$TYPE='$VALUE'"
  66         fi
  67     fi
  68 done
  69
  70 cat <<!EOF!
  71 #define ${macro_prefix}clock_t ${clock_t-int /* default */}
  72 #define ${macro_prefix}dev_t ${dev_t-int /* default */}
  73 #define ${macro_prefix}fpos_t ${fpos_t-long /* default */}
  74 #define ${macro_prefix}gid_t ${gid_t-int /* default */}
  75 #define ${macro_prefix}ino_t ${ino_t-int /* default */}
  76 #define ${macro_prefix}mode_t ${mode_t-int /* default */}
  77 #define ${macro_prefix}nlink_t ${nlink_t-int /* default */}
  78 #define ${macro_prefix}off_t ${off_t-long /* default */}
  79 #define ${macro_prefix}pid_t ${pid_t-int /* default */}
  80 #define ${macro_prefix}ptrdiff_t __PTRDIFF_TYPE__
  81 #define ${macro_prefix}size_t __SIZE_TYPE__
  82 #define ${macro_prefix}time_t ${time_t-int /* default */}
  83 #define ${macro_prefix}uid_t ${uid_t-int /* default */}
  84 #define ${macro_prefix}wchar_t __WCHAR_TYPE__
  85 #define ${macro_prefix}int32_t ${int32_t-int /* default */}
  86 #define ${macro_prefix}uint32_t ${uint32_t-unsigned int /* default */}
  87 !EOF!
  88
  89 # (wait_arg_t*) should be (int*), according to Posix, but
  90 # BSD traditionally used (union wait*).  Use (void*) to allow either usage.
  91 echo "#define ${macro_prefix}wait_arg_t void"
  92
  93 # ssize_t is the signed version of size_t
  94 if [ -n "${ssize_t}" ] ; then
  95     echo "#define ${macro_prefix}ssize_t ${ssize_t}"
  96 elif [ -z "${size_t}" ] ; then
  97     echo "#define ${macro_prefix}ssize_t long"
  98 else
  99     # Remove "unsigned" from ${size_t} to get ${ssize_t}.
 100     tmp="`echo ${size_t} | ${SED} -e 's|unsigned||g' -e 's|  | |g'`"
 101     if [ -z "$tmp" ] ; then
 102         tmp=int
 103     else
 104         # check $tmp doesn't conflict with <unistd.h>
 105         echo "#include <unistd.h>
 106         extern $tmp read();" >st-dummy.c
 107         ${CC} -c st-dummy.c >/dev/null 2>&1 || tmp=int
 108     fi
 109     echo "#define ${macro_prefix}ssize_t $tmp /* default */"
 110 fi
 111
 112 # va_list can cause problems (e.g. some systems have va_list as a struct).
 113 # Check to see if ${va_list-char*} really is compatible with stdarg.h.
 114 cat >st-dummy.c <<!EOF!
 115 #define X_va_list ${va_list-char* /* default */}
 116 extern long foo(X_va_list ap); /* Check that X_va_list compiles on its own */
 117 #include <stdarg.h>
 118 long foo(X_va_list ap) { return va_arg(ap, long); }
 119 long bar(int i, ...)
 120 { va_list ap; long j; va_start(ap, i); j = foo(ap); va_end(ap); return j; }
 121 !EOF!
 122 if ${CC} -c st-dummy.c >/dev/null 2>&1 ; then
 123   # Ok: We have something that works.
 124   echo "#define ${macro_prefix}va_list ${va_list-char* /* default */}"
 125 else
 126   # No, it breaks.  Indicate that <stdarg.h> must be included.
 127   echo "#define ${macro_prefix}NEED_STDARG_H
 128 #define ${macro_prefix}va_list va_list"
 129 fi
 130
 131 # stuff needed for curses.h
 132
 133 # This isn't correct for SVR4 (for example).  However, we only
 134 # use this when adding a missing prototype, so it shouldn't matter.
 135 echo "#define chtype int"
 136 # sys-protos.h uses non-standard names (due to the CHTYPE argument problem).
 137 echo "#define box32 box"
 138 echo "#define initscr32 initscr"
 139 echo "#define w32addch waddch"
 140 echo "#define w32insch winsch"
 141
 142 rm -f st-dummy.c st-dummy.o TMP st-dummy.out