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+?RCS: $Id: d_vprintf.U,v 3.0 1993/08/18 12:07:59 ram Exp $
+?RCS:
+?RCS: Copyright (c) 1991-1993, Raphael Manfredi
+?RCS:
+?RCS: You may redistribute only under the terms of the Artistic Licence,
+?RCS: as specified in the README file that comes with the distribution.
+?RCS: You may reuse parts of this distribution only within the terms of
+?RCS: that same Artistic Licence; a copy of which may be found at the root
+?RCS: of the source tree for dist 3.0.
+?RCS:
+?RCS: $Log: d_vprintf.U,v $
+?RCS: Revision 3.0 1993/08/18 12:07:59 ram
+?RCS: Baseline for dist 3.0 netwide release.
+?RCS:
+?MAKE:d_vprintf d_charvspr: Guess cat +cc +ccflags Csym Setvar
+?MAKE: -pick add $@ %<
+?S:d_vprintf:
+?S: This variable conditionally defines the HAS_VPRINTF symbol, which
+?S: indicates to the C program that the vprintf() routine is available
+?S: to printf with a pointer to an argument list.
+?S:.
+?S:d_charvspr:
+?S: This variable conditionally defines CHARVSPRINTF if this system
+?S: has vsprintf returning type (char*). The trend seems to be to
+?S: declare it as "int vsprintf()".
+?S:.
+?C:HAS_VPRINTF (VPRINTF):
+?C: This symbol, if defined, indicates that the vprintf routine is available
+?C: to printf with a pointer to an argument list. If unavailable, you
+?C: may need to write your own, probably in terms of _doprnt().
+?C:.
+?C:USE_CHAR_VSPRINTF (CHARVSPRINTF):
+?C: This symbol is defined if this system has vsprintf() returning type
+?C: (char*). The trend seems to be to declare it as "int vsprintf()". It
+?C: is up to the package author to declare vsprintf correctly based on the
+?C: symbol.
+?C:.
+?H:#$d_vprintf HAS_VPRINTF /**/
+?H:#$d_charvspr USE_CHAR_VSPRINTF /**/
+?H:.
+?T:val2
+?LINT:set d_vprintf d_charvspr
+: see if vprintf exists
+echo " "
+if set vprintf val -f d_vprintf; eval $csym; $val; then
+ echo 'vprintf() found.' >&4
+ val="$define"
+ $cat >vprintf.c <<'EOF'
+#include <varargs.h>
+
+main() { xxx("foo"); }
+
+xxx(va_alist)
+va_dcl
+{
+ va_list args;
+ char buf[10];
+
+ va_start(args);
+ exit((unsigned long)vsprintf(buf,"%s",args) > 10L);
+}
+EOF
+ if $cc $ccflags vprintf.c -o vprintf >/dev/null 2>&1 && ./vprintf; then
+ echo "Your vsprintf() returns (int)." >&4
+ val2="$undef"
+ else
+ echo "Your vsprintf() returns (char*)." >&4
+ val2="$define"
+ fi
+else
+ echo 'vprintf() NOT found.' >&4
+ val="$undef"
+ val2="$undef"
+fi
+set d_vprintf
+eval $setvar
+val=$val2
+set d_charvspr
+eval $setvar
+