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
   6 CC=${CC-./xgcc}
   7 CPP=${CPP-`echo ${CC} -E`}
   8 SED=sed
   9
  10 # Generate definitions for the standard types (such as mode_t)
  11 # compatible with those in the standard C header files.
  12 # It works by a dummy program through the C pre-processor, and then
  13 # using sed to search for typedefs in the output.
  14
  15 cat >dummy.c <<!EOF!
  16 #include <sys/types.h>
  17 #include <stddef.h>
  18 #include <stdarg.h>
  19 #include <stdio.h>
  20 #include <time.h>
  21 #include <signal.h>
  22 #ifdef size_t
  23 typedef size_t Xsize_t;
  24 #elif defined(__SIZE_TYPE__)
  25 typedef __SIZE_TYPE__ Xsize_t;
  26 #endif
  27 #ifdef ptrdiff_t
  28 typedef ptrdiff_t Xptrdiff_t;
  29 #elif defined(__PTRDIFF_TYPE__)
  30 typedef __PTRDIFF_TYPE__ Xptrdiff_t;
  31 #endif
  32 #ifdef wchar_t
  33 typedef wchar_t Xwchar_t;
  34 #elif defined(__WCHAR_TYPE__)
  35 typedef __WCHAR_TYPE__ Xwchar_t;
  36 #endif
  37 #ifdef va_list
  38 typedef va_list XXXva_list;
  39 #endif
  40 !EOF!
  41
  42 if ${CPP} dummy.c >TMP ; then true
  43 else
  44   echo "gen-params: could not invoke ${CPP} on dummy.c" 1>&2 ; exit 1
  45 fi
  46 tr '    ' ' ' <TMP >dummy.out
  47
  48 for TYPE in dev_t clock_t fpos_t gid_t ino_t mode_t nlink_t off_t pid_t ptrdiff_t sigset_t size_t ssize_t time_t uid_t va_list wchar_t int32_t uint_32_t ; do
  49     IMPORTED=`eval 'echo $'"$TYPE"`
  50     if [ -n "${IMPORTED}" ] ; then
  51         eval "$TYPE='$IMPORTED"
  52     else
  53         # Search dummy.out for a typedef for $TYPE, and write it out
  54         # to TMP in #define syntax.
  55         rm -f TMP
  56         ${SED} -n -e "s|.*typedef  *\(.*\) X*$TYPE *;.*|\1|w TMP" <dummy.out>/dev/null
  57         # Now select the first definition.
  58         if [ -s TMP ]; then
  59             # VALUE is now the typedef'd definition of $TYPE.
  60             eval "VALUE='`${SED} -e 's| *$||' -e '2,$d' <TMP`'"
  61             # Unless VALUE contains a blank, look for a typedef for it
  62             # in turn (this could be a loop, but that would be over-kill).
  63             if echo $VALUE | grep " " >/dev/null ; then true
  64             else
  65                 rm -f TMP
  66                 ${SED} -n -e "s|.*typedef[      ][      ]*\(.*[^a-zA-Z0-9_]\)${VALUE}[  ]*;.*|\1|w TMP" <dummy.out>/dev/null
  67                 if [ -s TMP ]; then
  68                     eval "VALUE='`${SED} -e '2,$d' -e 's|[      ]*$||' <TMP`'"
  69                 fi
  70             fi
  71             eval "$TYPE='$VALUE'"
  72         fi
  73     fi
  74 done
  75
  76 cat <<!EOF!
  77 #define ${macro_prefix}clock_t ${clock_t-int /* default */}
  78 #define ${macro_prefix}dev_t ${dev_t-int /* default */}
  79 #define ${macro_prefix}fpos_t ${fpos_t-long /* default */}
  80 #define ${macro_prefix}gid_t ${gid_t-int /* default */}
  81 #define ${macro_prefix}ino_t ${ino_t-int /* default */}
  82 #define ${macro_prefix}mode_t ${mode_t-int /* default */}
  83 #define ${macro_prefix}nlink_t ${nlink_t-int /* default */}
  84 #define ${macro_prefix}off_t ${off_t-long /* default */}
  85 #define ${macro_prefix}pid_t ${pid_t-int /* default */}
  86 #define ${macro_prefix}ptrdiff_t ${ptrdiff_t-long int /* default */}
  87 #define ${macro_prefix}sigset_t ${sigset_t-int /* default */}
  88 #define ${macro_prefix}size_t ${size_t-unsigned long /* default */}
  89 #define ${macro_prefix}time_t ${time_t-int /* default */}
  90 #define ${macro_prefix}uid_t ${uid_t-int /* default */}
  91 #define ${macro_prefix}wchar_t ${wchar_t-int /* default */}
  92 #define ${macro_prefix}int32_t ${int32_t-int /* default */}
  93 #define ${macro_prefix}uint32_t ${uint32_t-unsigned int /* default */}
  94 !EOF!
  95
  96 # (wait_arg_t*) should be (int*), according to Posix, but
  97 # BSD traditionally used (union wait*).  Use (void*) to allow either usage.
  98 echo "#define ${macro_prefix}wait_arg_t void"
  99
 100 # ssize_t is the signed version of size_t
 101 if [ -n "${ssize_t}" ] ; then
 102     echo "#define ${macro_prefix}ssize_t ${ssize_t}"
 103 elif [ -z "${size_t}" ] ; then
 104     echo "#define ${macro_prefix}ssize_t long"
 105 else
 106     # Remove "unsigned" from ${size_t} to get ${ssize_t}.
 107     tmp="`echo ${size_t} | ${SED} -e 's|unsigned||g' -e 's|  | |g'`"
 108     if [ -z "$tmp" ] ; then
 109         tmp=int
 110     else
 111         # check $tmp doesn't conflict with <unistd.h>
 112         echo "#include <unistd.h>
 113         extern $tmp read();" >dummy.c
 114         ${CC} -c dummy.c >/dev/null 2>&1 || tmp=int
 115     fi
 116     echo "#define ${macro_prefix}ssize_t $tmp /* default */"
 117 fi
 118
 119 # va_list can cause problems (e.g. some systems have va_list as a struct).
 120 # Check to see if ${va_list-char*} really is compatible with stdarg.h.
 121 cat >dummy.c <<!EOF!
 122 #define X_va_list ${va_list-char* /* default */}
 123 extern long foo(X_va_list ap); /* Check that X_va_list compiles on its own */
 124 #include <stdarg.h>
 125 long foo(X_va_list ap) { return va_arg(ap, long); }
 126 long bar(int i, ...)
 127 { va_list ap; long j; va_start(ap, i); j = foo(ap); va_end(ap); return j; }
 128 !EOF!
 129 if ${CC} -c dummy.c >/dev/null 2>&1 ; then
 130   # Ok: We have something that works.
 131   echo "#define ${macro_prefix}va_list ${va_list-char* /* default */}"
 132 else
 133   # No, it breaks.  Indicate that <stdarg.h> must be included.
 134   echo "#define ${macro_prefix}NEED_STDARG_H
 135 #define ${macro_prefix}va_list va_list"
 136 fi
 137
 138 # stuff needed for curses.h
 139
 140 # This isn't correct for SVR4 (for example).  However, we only
 141 # use this when adding a missing prototype, so it shouldn't matter.
 142 echo "#define chtype int"
 143 # sys-protos.h uses non-standard names (due to the CHTYPE argument problem).
 144 echo "#define box32 box"
 145 echo "#define initscr32 initscr"
 146 echo "#define w32addch waddch"
 147 echo "#define w32insch winsch"
 148
 149 rm -f dummy.c dummy.o TMP dummy.out