Initial revision

From-SVN: r5124

gcc/scan-types.sh

+#! /bin/sh
+# Deduce values of standard ANSI and POSIX types (e.g. size_t, pid_t).
+# Emits macros definitions for these, and some other types.
+# Intended to be used to massage the sys-protos.h file.
+
+CC=${CC-./xgcc}
+CPP=${CPP-`echo ${CC} -E`}
+SED=sed
+
+# Generate definitions for the standard types (such as mode_t)
+# compatible with those in the standard C header files.
+# It works by a dummy program through the C pre-processor, and then
+# using sed to search for typedefs in the output.
+
+cat >dummy.c <<!EOF!
+#include <sys/types.h>
+#include <stddef.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <time.h>
+#include <signal.h>
+#ifdef size_t
+typedef size_t Xsize_t;
+#elif defined(__SIZE_TYPE__)
+typedef __SIZE_TYPE__ Xsize_t;
+#endif
+#ifdef ptrdiff_t
+typedef ptrdiff_t Xptrdiff_t;
+#elif defined(__PTRDIFF_TYPE__)
+typedef __PTRDIFF_TYPE__ Xptrdiff_t;
+#endif
+#ifdef wchar_t
+typedef wchar_t Xwchar_t;
+#elif defined(__WCHAR_TYPE__)
+typedef __WCHAR_TYPE__ Xwchar_t;
+#endif
+#ifdef va_list
+typedef va_list XXXva_list;
+#endif
+!EOF!
+
+if ${CPP} dummy.c >TMP ; then true
+else
+  echo "gen-params: could not invoke ${CPP} on dummy.c" 1>&2 ; exit 1
+fi
+tr '	' ' ' <TMP >dummy.out
+
+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
+    IMPORTED=`eval 'echo $'"$TYPE"`
+    if [ -n "${IMPORTED}" ] ; then
+	eval "$TYPE='$IMPORTED"
+    else
+	# Search dummy.out for a typedef for $TYPE, and write it out
+	# to TMP in #define syntax.
+	rm -f TMP
+	${SED} -n -e "s|.*typedef  *\(.*\) X*$TYPE *;.*|\1|w TMP" <dummy.out>/dev/null
+	# Now select the first definition.
+        if [ -s TMP ]; then
+	    # VALUE is now the typedef'd definition of $TYPE.
+            eval "VALUE='`${SED} -e 's| *$||' -e '2,$d' <TMP`'"
+	    # Unless VALUE contains a blank, look for a typedef for it
+	    # in turn (this could be a loop, but that would be over-kill).
+	    if echo $VALUE | grep " " >/dev/null ; then true
+	    else
+		rm -f TMP
+		${SED} -n -e "s|.*typedef[ 	][ 	]*\(.*[^a-zA-Z0-9_]\)${VALUE}[ 	]*;.*|\1|w TMP" <dummy.out>/dev/null
+		if [ -s TMP ]; then
+		    eval "VALUE='`${SED} -e '2,$d' -e 's|[ 	]*$||' <TMP`'"
+		fi
+	    fi
+	    eval "$TYPE='$VALUE'"
+	fi
+    fi
+done
+
+cat <<!EOF!
+#define ${macro_prefix}clock_t ${clock_t-int /* default */}
+#define ${macro_prefix}dev_t ${dev_t-int /* default */}
+#define ${macro_prefix}fpos_t ${fpos_t-long /* default */}
+#define ${macro_prefix}gid_t ${gid_t-int /* default */}
+#define ${macro_prefix}ino_t ${ino_t-int /* default */}
+#define ${macro_prefix}mode_t ${mode_t-int /* default */}
+#define ${macro_prefix}nlink_t ${nlink_t-int /* default */}
+#define ${macro_prefix}off_t ${off_t-long /* default */}
+#define ${macro_prefix}pid_t ${pid_t-int /* default */}
+#define ${macro_prefix}ptrdiff_t ${ptrdiff_t-long int /* default */}
+#define ${macro_prefix}sigset_t ${sigset_t-int /* default */}
+#define ${macro_prefix}size_t ${size_t-unsigned long /* default */}
+#define ${macro_prefix}time_t ${time_t-int /* default */}
+#define ${macro_prefix}uid_t ${uid_t-int /* default */}
+#define ${macro_prefix}wchar_t ${wchar_t-int /* default */}
+#define ${macro_prefix}int32_t ${int32_t-int /* default */}
+#define ${macro_prefix}uint32_t ${uint32_t-unsigned int /* default */}
+!EOF!
+
+# (wait_arg_t*) should be (int*), according to Posix, but
+# BSD traditionally used (union wait*).  Use (void*) to allow either usage.
+echo "#define ${macro_prefix}wait_arg_t void"
+
+# ssize_t is the signed version of size_t
+if [ -n "${ssize_t}" ] ; then
+    echo "#define ${macro_prefix}ssize_t ${ssize_t}"
+elif [ -z "${size_t}" ] ; then
+    echo "#define ${macro_prefix}ssize_t long"
+else
+    # Remove "unsigned" from ${size_t} to get ${ssize_t}.
+    tmp="`echo ${size_t} | ${SED} -e 's|unsigned||g' -e 's|  | |g'`"
+    if [ -z "$tmp" ] ; then
+	tmp=int
+    else
+	# check $tmp doesn't conflict with <unistd.h>
+	echo "#include <unistd.h>
+	extern $tmp read();" >dummy.c
+	${CC} -c dummy.c >/dev/null 2>&1 || tmp=int
+    fi
+    echo "#define ${macro_prefix}ssize_t $tmp /* default */"
+fi
+
+# va_list can cause problems (e.g. some systems have va_list as a struct).
+# Check to see if ${va_list-char*} really is compatible with stdarg.h.
+cat >dummy.c <<!EOF!
+#define X_va_list ${va_list-char* /* default */}
+extern long foo(X_va_list ap); /* Check that X_va_list compiles on its own */
+#include <stdarg.h>
+long foo(X_va_list ap) { return va_arg(ap, long); }
+long bar(int i, ...)
+{ va_list ap; long j; va_start(ap, i); j = foo(ap); va_end(ap); return j; }
+!EOF!
+if ${CC} -c dummy.c >/dev/null 2>&1 ; then
+  # Ok: We have something that works.
+  echo "#define ${macro_prefix}va_list ${va_list-char* /* default */}"
+else
+  # No, it breaks.  Indicate that <stdarg.h> must be included.
+  echo "#define ${macro_prefix}NEED_STDARG_H
+#define ${macro_prefix}va_list va_list"
+fi
+
+# stuff needed for curses.h
+
+# This isn't correct for SVR4 (for example).  However, we only
+# use this when adding a missing prototype, so it shouldn't matter.
+echo "#define chtype int"
+# sys-protos.h uses non-standard names (due to the CHTYPE argument problem).
+echo "#define box32 box"
+echo "#define initscr32 initscr"
+echo "#define w32addch waddch"
+echo "#define w32insch winsch"
+
+rm -f dummy.c dummy.o TMP dummy.out