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Diffstat (limited to 'mcon/U/d_casti32.U')
| -rw-r--r-- | mcon/U/d_casti32.U | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/mcon/U/d_casti32.U b/mcon/U/d_casti32.U new file mode 100644 index 0000000..7d24f08 --- /dev/null +++ b/mcon/U/d_casti32.U @@ -0,0 +1,87 @@ +?RCS: $Id$ +?RCS: +?RCS: Copyright (c) 1991-1997, 2004-2006, 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 4.0. +?RCS: +?RCS: Original Author: Andy Dougherty <doughera@lafcol.lafayette.edu> +?RCS: +?RCS: $Log: d_casti32.U,v $ +?RCS: Revision 3.0.1.3 1995/05/12 12:10:45 ram +?RCS: patch54: made sure cc and ccflags are conditional dependencies +?RCS: +?RCS: Revision 3.0.1.2 1994/10/29 16:09:37 ram +?RCS: patch36: declare signal handler correctly (ADO) +?RCS: +?RCS: Revision 3.0.1.1 1994/08/29 16:07:06 ram +?RCS: patch32: created by ADO +?RCS: +?X: +?X: Can the compiler cast large floats to 32-bit integers? +?X: +?MAKE:d_casti32: cat +cc +ccflags rm intsize Setvar test signal_t +?MAKE: -pick add $@ %< +?S:d_casti32: +?S: This variable conditionally defines CASTI32, which indicates +?S: whether the C compiler can cast large floats to 32-bit ints. +?S:. +?C:CASTI32: +?C: This symbol is defined if the C compiler can cast negative +?C: or large floating point numbers to 32-bit ints. +?C:. +?T:xxx yyy +?H:#$d_casti32 CASTI32 /**/ +?H:. +?F:!try +?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 +else + xxx=long +fi +$cat >try.c <<EOCP +#include <sys/types.h> +#include <signal.h> +$signal_t blech() { exit(3); } +int main() +{ + $xxx i32; + double f; + int result = 0; + signal(SIGFPE, blech); + + f = (double) 0x7fffffff; + f = 10 * f; + i32 = ($xxx) f; + + if (i32 != ($xxx) f) + result |= 1; + exit(result); +} +EOCP +if $cc $ccflags -o try try.c >/dev/null 2>&1; then + ./try + yyy=$? +else + echo "(I can't seem to compile the test program--assuming it can't)" + yyy=1 +fi +case "$yyy" in +0) val="$define" + echo "Yup, it can." + ;; +*) val="$undef" + echo "Nope, it can't." + ;; +esac +set d_casti32 +eval $setvar +$rm -f try try.* + |