fix .gitignore: only ignore 'perl' in root of repo, not U/perl subdir

[metaconfig.git] / U / perl / d_isfinite.U

?RCS: $Id$
?RCS:
?RCS: Copyright (c) 2000 Jarkko Hietaniemi
?RCS:
?RCS: You may distribute under the terms of either the GNU General Public
?RCS: License or the Artistic License, as specified in the README file.
?RCS:
?MAKE:d_isfinite: Inlibc cat i_math Compile rm_try Setvar
?MAKE:	-pick add $@ %<
?S:d_isfinite:
?S:	This variable conditionally defines the HAS_ISFINITE symbol, which
?S:	indicates to the C program that the isfinite() routine is available.
?S:.
?C:HAS_ISFINITE:
?C:	This symbol, if defined, indicates that the isfinite routine is
?C:	available to check whether a double is finite (non-infinity non-NaN).
?C:.
?LINT:set d_isfinite
?H:#$d_isfinite HAS_ISFINITE		/**/
?H:.
: check for isfinite
echo "Checking to see if you have isfinite..." >&4
$cat >try.c <<EOCP
#$i_math I_MATH
#ifdef I_MATH
#include <math.h>
#endif
int main() { return isfinite(0.0); }
EOCP
set try
if eval $compile; then
	val="$define"
	echo "You have isfinite."
else
	val="$undef"
	echo "You do not have isfinite."
fi
$rm_try
set d_isfinite
eval $setvar