?RCS: $Id$
?RCS:
?RCS: Copyright (c) 1999, Jarkko Hietaniemi
?RCS:
?RCS: You may redistribute only under the terms of the Artistic License,
?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 License; a copy of which may be found at the root
?RCS: of the source tree for dist 3.0.
?RCS:
?MAKE:d_ldbl_dig: Myread contains cat rm Setvar i_limits i_float \
	cppstdin cppflags cppminus
?MAKE:	-pick add $@ %<
?S:d_ldbl_dig:
?S:	This variable conditionally defines d_ldbl_dig if this system's
?S:	header files provide LDBL_DIG, which is the number of significant
?S:	digits in a long double precision number.
?S:.
?C:HAS_LDBL_DIG:
?C:	This symbol, if defined, indicates that this system's <float.h>
?C:	or <limits.h> defines the symbol LDBL_DIG, which is the number
?C:	of significant digits in a long double precision number. Unlike
?C:	for DBL_DIG, there's no good guess for LDBL_DIG if it is undefined.
?C:.
?H:#$d_ldbl_dig HAS_LDBL_DIG 	/* */
?H:.
?F:!ldbl_dig.c
?LINT:set d_ldbl_dig
: See if number of significant digits in a double precision number is known
echo " "
$cat >ldbl_dig.c <<EOM
#$i_limits I_LIMITS
#$i_float I_FLOAT
#ifdef I_LIMITS
#include <limits.h>
#endif
#ifdef I_FLOAT
#include <float.h>
#endif
#ifdef LDBL_DIG
printf("Contains LDBL_DIG");
#endif
EOM
$cppstdin $cppflags $cppminus < ldbl_dig.c >ldbl_dig.E 2>/dev/null
if $contains 'LDBL_DIG' ldbl_dig.E >/dev/null 2>&1; then
	echo "LDBL_DIG found." >&4
	val="$define"
else
	echo "LDBL_DIG NOT found." >&4
	val="$undef"
fi
$rm -f ldbl_dig.?
set d_ldbl_dig
eval $setvar