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+?RCS: $Id: d_casti32.U,v 1995/05/12 12:10:45 ram Exp $
+?RCS: Copyright (c) 1991-1993, Raphael Manfredi
+?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: Original Author: Andy Dougherty <>
+?RCS: $Log: d_casti32.U,v $
+?RCS: Revision 1995/05/12 12:10:45 ram
+?RCS: patch54: made sure cc and ccflags are conditional dependencies
+?RCS: Revision 1994/10/29 16:09:37 ram
+?RCS: patch36: declare signal handler correctly (ADO)
+?RCS: Revision 1994/08/29 16:07:06 ram
+?RCS: patch32: created by ADO
+?X: Can the compiler cast large floats to 32-bit integers?
+?MAKE:d_casti32: cat +cc +ccflags rm intsize Setvar test signal_t
+?MAKE: -pick add $@ %<
+?S: This variable conditionally defines CASTI32, which indicates
+?S: whether the C compiler can cast large floats to 32-bit ints.
+?C: This symbol is defined if the C compiler can cast negative
+?C: or large floating point numbers to 32-bit ints.
+?T:xxx yyy
+?H:#$d_casti32 CASTI32 /**/
+?LINT:set d_casti32
+: check for ability to cast large floats to 32-bit ints.
+echo " "
+echo 'Checking whether your C compiler can cast large floats to int32.' >&4
+if $test "$intsize" -eq 4; then
+ xxx=int
+ xxx=long
+$cat >try.c <<EOCP
+#include <sys/types.h>
+#include <signal.h>
+$signal_t blech() { exit(3); }
+ $xxx i32;
+ double f;
+ int result = 0;
+ signal(SIGFPE, blech);
+ f = (double) 0x7fffffff;
+ f = 10 * f;
+ i32 = ($xxx) f;
+ if (i32 != ($xxx) f)
+ result |= 1;
+ exit(result);
+if $cc -o try $ccflags try.c >/dev/null 2>&1; then
+ ./try
+ yyy=$?
+ echo "(I can't seem to compile the test program--assuming it can't)"
+ yyy=1
+case "$yyy" in
+0) val="$define"
+ echo "Yup, it can."
+ ;;
+*) val="$undef"
+ echo "Nope, it can't."
+ ;;
+set d_casti32
+eval $setvar
+$rm -f try try.*