Re: An aliasing problem
Sam Steingold <[email protected]>
| Newsgroups | gmane.lisp.clisp.devel |
|---|---|
| Message-ID | <m1o9xnz0az.fsf@clr-sds> |
Hi Bruno, > * Bruno Haible <[email protected]> [2017-02-27 22:36:07 +0100]: > >> diff -r 208ade5c97ca src/makemake.in >> --- a/src/makemake.in Sun Feb 26 20:07:47 2017 -0500 >> +++ b/src/makemake.in Mon Feb 27 13:05:45 2017 -0500 >> @@ -1335,13 +1335,12 @@ fi >> # specific compiler options. I prefer to do it through compiler options. >> if [ $XCC_GCC = true ] ; then >> XCFLAGS=$XCFLAGS' -fno-strict-aliasing' >> -else >> - if [ "$HSYSOS" = aix ] ; then # for xlc >> +elif [ "$HSYSOS" = aix ] ; then # for xlc >> XCFLAGS=$XCFLAGS' -qalias=noansi' >> - fi >> - if [ -n "$XCC_SUNPRO" ] ; then # for SUNWspro cc >> +elif [ -n "$XCC_SUNPRO" ] ; then # for SUNWspro cc >> XCFLAGS=$XCFLAGS' -xalias_level=weak' >> - fi >> +elif [ "${with_debug}" != no ]; then >> + echo "$0: WARNING: how to disable strict aliasing with ${XCC} on ${HSYSOS}?" >&2 >> fi >> >> if [ "${with_dynamic_modules}" != no ]; then # not on msvc > > The users of the configure script are most often our users, not ourselves, > therefore such a warning it not very helpful. On a second thought, this appears like a clear case for an autoconf test: check whether the default compiler does strict aliasing optimizations and, if it does, try to disable them, and if we cannot disable them, fail configure. -- Sam Steingold (http://sds.podval.org/) on darwin Ns 10.3.1504 http://steingoldpsychology.com http://www.childpsy.net https://jihadwatch.org http://www.dhimmitude.org http://www.memritv.org http://islamexposedonline.com There are two ways to win an argument with a woman. Neither works. ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot _______________________________________________ clisp-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/clisp-devel