Commit 848f0f73 authored by Paul Eggert's avatar Paul Eggert

Fix floating point exceptions on Alpha (Bug#32086)

Backport from master.
* admin/merge-gnulib (GNULIB_MODULES): Add fpieee.
* m4/fpieee.m4: New file, copied from Gnulib.
* m4/gnulib-comp.m4: Regenerate.
parent 65889a6d
......@@ -33,7 +33,7 @@ GNULIB_MODULES='
d-type diffseq dtoastr dtotimespec dup2
environ execinfo explicit_bzero faccessat
fcntl fcntl-h fdatasync fdopendir
filemode filevercmp flexmember fstatat fsync
filemode filevercmp flexmember fpieee fstatat fsync
getloadavg getopt-gnu gettime gettimeofday gitlog-to-changelog
ignore-value intprops largefile lstat
manywarnings memrchr minmax mkostemp mktime nstrftime
......
......@@ -21,7 +21,7 @@
# the same distribution terms as the rest of that program.
#
# Generated by gnulib-tool.
# Reproduce by: gnulib-tool --import --lib=libgnu --source-base=lib --m4-base=m4 --doc-base=doc --tests-base=tests --aux-dir=build-aux --avoid=close --avoid=dup --avoid=fchdir --avoid=fstat --avoid=malloc-posix --avoid=msvc-inval --avoid=msvc-nothrow --avoid=openat-die --avoid=opendir --avoid=raise --avoid=save-cwd --avoid=select --avoid=setenv --avoid=sigprocmask --avoid=stat --avoid=stdarg --avoid=stdbool --avoid=threadlib --avoid=tzset --avoid=unsetenv --avoid=utime --avoid=utime-h --gnu-make --makefile-name=gnulib.mk.in --conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files alloca-opt binary-io byteswap c-ctype c-strcase careadlinkat close-stream count-leading-zeros count-one-bits count-trailing-zeros crypto/md5 crypto/sha1 crypto/sha256 crypto/sha512 d-type diffseq dtoastr dtotimespec dup2 environ execinfo explicit_bzero faccessat fcntl fcntl-h fdatasync fdopendir filemode filevercmp flexmember fstatat fsync getloadavg getopt-gnu gettime gettimeofday gitlog-to-changelog ignore-value intprops largefile lstat manywarnings memrchr minmax mkostemp mktime nstrftime pipe2 pselect pthread_sigmask putenv qcopy-acl readlink readlinkat sig2str socklen stat-time std-gnu11 stdalign stddef stdio stpcpy strtoimax symlink sys_stat sys_time tempname time time_r time_rz timegm timer-time timespec-add timespec-sub unlocked-io update-copyright utimens vla warnings
# Reproduce by: gnulib-tool --import --lib=libgnu --source-base=lib --m4-base=m4 --doc-base=doc --tests-base=tests --aux-dir=build-aux --avoid=close --avoid=dup --avoid=fchdir --avoid=fstat --avoid=malloc-posix --avoid=msvc-inval --avoid=msvc-nothrow --avoid=openat-die --avoid=opendir --avoid=raise --avoid=save-cwd --avoid=select --avoid=setenv --avoid=sigprocmask --avoid=stat --avoid=stdarg --avoid=stdbool --avoid=threadlib --avoid=tzset --avoid=unsetenv --avoid=utime --avoid=utime-h --gnu-make --makefile-name=gnulib.mk.in --conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files alloca-opt binary-io byteswap c-ctype c-strcase careadlinkat close-stream count-leading-zeros count-one-bits count-trailing-zeros crypto/md5 crypto/sha1 crypto/sha256 crypto/sha512 d-type diffseq dtoastr dtotimespec dup2 environ execinfo explicit_bzero faccessat fcntl fcntl-h fdatasync fdopendir filemode filevercmp flexmember fpieee fstatat fsync getloadavg getopt-gnu gettime gettimeofday gitlog-to-changelog ignore-value intprops largefile lstat manywarnings memrchr minmax mkostemp mktime nstrftime pipe2 pselect pthread_sigmask putenv qcopy-acl readlink readlinkat sig2str socklen stat-time std-gnu11 stdalign stddef stdio stpcpy strtoimax symlink sys_stat sys_time tempname time time_r time_rz timegm timer-time timespec-add timespec-sub unlocked-io update-copyright utimens vla warnings
MOSTLYCLEANFILES += core *.stackdump
......
# fpieee.m4 serial 2 -*- coding: utf-8 -*-
dnl Copyright (C) 2007, 2009-2018 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
dnl IEEE 754 standardized three items:
dnl - The formats of single-float and double-float - nowadays commonly
dnl available as 'float' and 'double' in C and C++.
dnl No autoconf test needed.
dnl - The overflow and division by zero behaviour: The result are values
dnl '±Inf' and 'NaN', rather than exceptions as it was before.
dnl This file provides an autoconf macro for ensuring this behaviour of
dnl floating-point operations.
dnl - A set of conditions (overflow, underflow, inexact, etc.) which can
dnl be configured to trigger an exception.
dnl This cannot be done in a portable way: it depends on the compiler,
dnl libc, kernel, and CPU. No autoconf macro is provided for this.
dnl Ensure non-trapping behaviour of floating-point overflow and
dnl floating-point division by zero.
dnl (For integer overflow, see gcc's -ftrapv option; for integer division by
dnl zero, see the autoconf macro in intdiv0.m4.)
AC_DEFUN([gl_FP_IEEE],
[
AC_REQUIRE([AC_PROG_CC])
AC_REQUIRE([AC_CANONICAL_HOST])
# IEEE behaviour is the default on all CPUs except Alpha and SH
# (according to the test results of Bruno Haible's ieeefp/fenv_default.m4
# and the GCC 4.1.2 manual).
case "$host_cpu" in
alpha*)
# On Alpha systems, a compiler option provides the behaviour.
# See the ieee(3) manual page, also available at
# <https://backdrift.org/man/tru64/man3/ieee.3.html>
if test -n "$GCC"; then
# GCC has the option -mieee.
# For full IEEE compliance (rarely needed), use option -mieee-with-inexact.
CPPFLAGS="$CPPFLAGS -mieee"
else
# Compaq (ex-DEC) C has the option -ieee, equivalent to -ieee_with_no_inexact.
# For full IEEE compliance (rarely needed), use option -ieee_with_inexact.
CPPFLAGS="$CPPFLAGS -ieee"
fi
;;
sh*)
if test -n "$GCC"; then
# GCC has the option -mieee.
CPPFLAGS="$CPPFLAGS -mieee"
fi
;;
esac
])
......@@ -86,6 +86,8 @@ AC_DEFUN([gl_EARLY],
# Code from module filevercmp:
# Code from module flexmember:
# Code from module fpending:
# Code from module fpieee:
AC_REQUIRE([gl_FP_IEEE])
# Code from module fstatat:
# Code from module fsync:
# Code from module getdtablesize:
......@@ -994,6 +996,7 @@ AC_DEFUN([gl_FILE_LIST], [
m4/filemode.m4
m4/flexmember.m4
m4/fpending.m4
m4/fpieee.m4
m4/fstatat.m4
m4/fsync.m4
m4/getdtablesize.m4
......
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