?RCS: $Id: Largefile.U 7243 2004-11-03 07:25:41Z rmanfredi $
?RCS:
?RCS: @COPYRIGHT@
?RCS:
?MAKE:Largefile: cat cc ccflags ldflags i_unistd
?MAKE:	-pick add $@ %<
?T:flags large
?F:!try.c !try
?W:%<:off_t
?LINT:change ccflags
: determine how to compile for large 64-bit file support
echo " "
echo "Checking whether we need flags for large file support..." >&4
$cat >try.c <<'EOC'
#include <sys/types.h>
#ifdef I_UNISTD
#include <unistd.h>
#endif
int main(void)
{
	switch (0) { case 0: case (sizeof(off_t) >= 8): break; }
	return 0;
}
EOC
flags=''
large='-D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64'
case "$i_unistd" in
"$define") flags='-DI_UNISTD';;
esac
if $cc $ccflags $flags $ldflags -o try try.c >/dev/null 2>&1; then
	echo "Selected C flags already provide 64-bit file support."
else
	echo "You're not natively compiling for large file, fixing..." >&4
	if $cc $ccflags $flags $large $ldflags -o try try.c >/dev/null 2>&1
	then
		echo "(Adding $large)"; ccflags="$ccflags $large"
	else
		echo "(Could not compile the test program, using 32-bit files)" >&4
	fi
fi