Package: emacs;
Reported by: Joakim Jalap <joakim.jalap <at> fastmail.com>
Date: Sat, 16 Jan 2016 18:25:02 UTC
Severity: important
Done: Paul Eggert <eggert <at> cs.ucla.edu>
Bug is archived. No further changes may be made.
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bug-gnu-emacs <at> gnu.org:bug#22385; Package emacs.
(Sat, 16 Jan 2016 18:25:02 GMT) Full text and rfc822 format available.Joakim Jalap <joakim.jalap <at> fastmail.com>:bug-gnu-emacs <at> gnu.org.
(Sat, 16 Jan 2016 18:25:03 GMT) Full text and rfc822 format available.Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):
From: Joakim Jalap <joakim.jalap <at> fastmail.com> To: bug-gnu-emacs <at> gnu.org Subject: 24.5; Build failure with modules on OpenBSD Date: Sat, 16 Jan 2016 18:43:40 +0100
[Message part 1 (text/plain, inline)]
Hello I discovered a little problem while trying to build emacs-25 with modules on OpenBSD-current. The problem is that an assertion fails because HAVE_ATTRIBUTE_CLEANUP is not true, even though I'm using clang which does support the cleanup attribute (I think). This is because the test for whether CC supports that attribute (m4/ax_gcc_var_attribute.m4 m4/ax_gcc_var_attribute.m4) only checks if there were warnings issued and if so decides that the compiler has no support. But OpenBSDs linker (I think it is) outputs the following warnings: /usr/X11R6/lib/libX11.so.16.1: warning: warning: strcpy() is almost always misused, please use strlcpy() /usr/X11R6/lib/libX11.so.16.1: warning: warning: strcat() is almost always misused, please use strlcat() /usr/X11R6/lib/libX11.so.16.1: warning: warning: sprintf() is often misused, please use snprintf() which are completely unrelated to lack of attribute support. The attached fix allows me to build. It isn't meant as a real solution, it's more to illustrate the problem. I guess another way to go migt be to run this test with empty linker flags, but I haven't tried that. Either way, I hope this is of some use. -- Joakim
[ignore_openbsd_warns.patch (text/x-patch, inline)]
diff --git m4/ax_gcc_var_attribute.m4 m4/ax_gcc_var_attribute.m4
index d12fce8..963af5e 100644
--- m4/ax_gcc_var_attribute.m4
+++ m4/ax_gcc_var_attribute.m4
@@ -55,6 +55,11 @@
#serial 3
AC_DEFUN([AX_GCC_VAR_ATTRIBUTE], [
+
+ dnl Temporarily make unknown attributes an error
+ OLDCFLAGS="$CFLAGS"
+ CFLAGS="$CFLAGS -Werror=attributes"
+
AS_VAR_PUSHDEF([ac_var], [ax_cv_have_var_attribute_$1])
AC_CACHE_CHECK([for __attribute__(($1))], [ac_var], [
@@ -124,15 +129,12 @@ AC_DEFUN([AX_GCC_VAR_ATTRIBUTE], [
[]
)])
],
- dnl GCC doesn't exit with an error if an unknown attribute is
- dnl provided but only outputs a warning, so accept the attribute
- dnl only if no warning were issued.
- [AS_IF([test -s conftest.err],
- [AS_VAR_SET([ac_var], [no])],
- [AS_VAR_SET([ac_var], [yes])])],
+ [AS_VAR_SET([ac_var], [yes])],
[AS_VAR_SET([ac_var], [no])])
])
+ CFLAGS="$OLDCFLAGS"
+
AS_IF([test yes = AS_VAR_GET([ac_var])],
[AC_DEFINE_UNQUOTED(AS_TR_CPP(HAVE_VAR_ATTRIBUTE_$1), 1,
[Define to 1 if the system has the `$1' variable attribute])], [])
[Message part 3 (text/plain, inline)]
In GNU Emacs 24.5.1 (x86_64-unknown-openbsd, GTK+ Version 3.18.6) of 2015-12-09 on amd64.ports.openbsd.org Windowing system distributor `The X.Org Foundation', version 11.0.11704000 Configured using: `configure --build=amd64-unknown-openbsd --without-sound --with-x-toolkit=gtk3 --prefix=/usr/local --sysconfdir=/etc --mandir=/usr/local/man --infodir=/usr/local/info --localstatedir=/var --disable-silent-rules --disable-gtk-doc 'CFLAGS=-O2 -pipe -fno-pie' CPPFLAGS=-I/usr/local/include 'LDFLAGS=-L/usr/local/lib -nopie'' Important settings: locale-coding-system: nil Major mode: Org Minor modes in effect: show-paren-mode: t global-linum-mode: t rich-minority-mode: t global-cwarn-mode: t global-git-commit-mode: t async-bytecomp-package-mode: t shell-dirtrack-mode: t global-semantic-idle-scheduler-mode: t global-semanticdb-minor-mode: t semantic-mode: t erc-notifications-mode: t erc-list-mode: t erc-menu-mode: t erc-autojoin-mode: t erc-ring-mode: t erc-networks-mode: t erc-pcomplete-mode: t erc-track-mode: t erc-match-mode: t erc-button-mode: t erc-fill-mode: t erc-stamp-mode: t erc-netsplit-mode: t erc-irccontrols-mode: t erc-noncommands-mode: t erc-move-to-prompt-mode: t erc-readonly-mode: t w3m-fb-mode: t global-hl-line-mode: t diff-auto-refine-mode: t global-company-mode: t company-mode: t TeX-PDF-mode: t TeX-source-correlate-mode: t flx-ido-mode: t ido-everywhere: t global-undo-tree-mode: t undo-tree-mode: t global-auto-revert-mode: t projectile-global-mode: t projectile-mode: t tooltip-mode: t electric-indent-mode: t mouse-wheel-mode: t menu-bar-mode: t file-name-shadow-mode: t global-font-lock-mode: t font-lock-mode: t auto-composition-mode: t auto-encryption-mode: t auto-compression-mode: t column-number-mode: t line-number-mode: t auto-fill-function: do-auto-fill transient-mark-mode: t Recent messages: [2 times] Buffer is read-only (emacs gnus type) Buffer is read-only Describe-Function... Making completion list... Quit Entering debugger... Back to top level. Making completion list... 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hashtable-print-readable backquote make-network-process dbusbind gfilenotify dynamic-setting system-font-setting font-render-setting move-toolbar gtk x-toolkit x multi-tty emacs) Memory information: ((conses 16 1027147 421321) (symbols 48 76509 1) (miscs 40 863 1582) (strings 32 207041 118087) (string-bytes 1 6146562) (vectors 16 147798) (vector-slots 8 3193259 446740) (floats 8 17152 16902) (intervals 56 10608 3318) (buffers 960 31))
Glenn Morris <rgm <at> gnu.org>
to control <at> debbugs.gnu.org.
(Sat, 16 Jan 2016 18:30:02 GMT) Full text and rfc822 format available.Glenn Morris <rgm <at> gnu.org>
to control <at> debbugs.gnu.org.
(Sat, 16 Jan 2016 18:30:03 GMT) Full text and rfc822 format available.bug-gnu-emacs <at> gnu.org:bug#22385; Package emacs.
(Sun, 17 Jan 2016 16:24:01 GMT) Full text and rfc822 format available.Message #12 received at 22385 <at> debbugs.gnu.org (full text, mbox):
From: Philipp Stephani <p.stephani2 <at> gmail.com> To: Joakim Jalap <joakim.jalap <at> fastmail.com>, 22385 <at> debbugs.gnu.org Subject: Re: bug#22385: 24.5; Build failure with modules on OpenBSD Date: Sun, 17 Jan 2016 16:22:48 +0000
[Message part 1 (text/plain, inline)]
Thanks for reporting. I guess this should also reported against autoconf-archive because the m4 file is from there ( https://www.gnu.org/software/autoconf-archive/How-to-contribute.html). More generally, a test for a GCC-style attribute should use the __has_attribute builtin if available and only resort to brittler methods such as warning output checks if the builtin is unavailable. Joakim Jalap <joakim.jalap <at> fastmail.com> schrieb am Sa., 16. Jan. 2016 um 19:25 Uhr: > > Hello > > I discovered a little problem while trying to build emacs-25 with modules > on > OpenBSD-current. The problem is that an assertion fails because > HAVE_ATTRIBUTE_CLEANUP is not true, even though I'm using clang which does > support the cleanup attribute (I think). > > This is because the test for whether CC supports that attribute > (m4/ax_gcc_var_attribute.m4 m4/ax_gcc_var_attribute.m4) only checks if > there > were warnings issued and if so decides that the compiler has no support. > But > OpenBSDs linker (I think it is) outputs the following warnings: > > /usr/X11R6/lib/libX11.so.16.1: warning: warning: strcpy() is almost always > misused, please use strlcpy() > /usr/X11R6/lib/libX11.so.16.1: warning: warning: strcat() is almost always > misused, please use strlcat() > /usr/X11R6/lib/libX11.so.16.1: warning: warning: sprintf() is often > misused, please use snprintf() > > which are completely unrelated to lack of attribute support. > > The attached fix allows me to build. It isn't meant as a real solution, > it's more to illustrate the problem. > > I guess another way to go migt be to run this test with empty linker > flags, but > I haven't tried that. > > Either way, I hope this is of some use. > > -- Joakim > > > > In GNU Emacs 24.5.1 (x86_64-unknown-openbsd, GTK+ Version 3.18.6) > of 2015-12-09 on amd64.ports.openbsd.org > Windowing system distributor `The X.Org Foundation', version 11.0.11704000 > Configured using: > `configure --build=amd64-unknown-openbsd --without-sound > --with-x-toolkit=gtk3 --prefix=/usr/local --sysconfdir=/etc > --mandir=/usr/local/man --infodir=/usr/local/info --localstatedir=/var > --disable-silent-rules --disable-gtk-doc 'CFLAGS=-O2 -pipe -fno-pie' > CPPFLAGS=-I/usr/local/include 'LDFLAGS=-L/usr/local/lib -nopie'' > > Important settings: > locale-coding-system: nil > > Major mode: Org > > Minor modes in effect: > show-paren-mode: t > global-linum-mode: t > rich-minority-mode: t > global-cwarn-mode: t > global-git-commit-mode: t > async-bytecomp-package-mode: t > shell-dirtrack-mode: t > global-semantic-idle-scheduler-mode: t > global-semanticdb-minor-mode: t > semantic-mode: t > erc-notifications-mode: t > erc-list-mode: t > erc-menu-mode: t > erc-autojoin-mode: t > erc-ring-mode: t > erc-networks-mode: t > erc-pcomplete-mode: t > erc-track-mode: t > erc-match-mode: t > erc-button-mode: t > erc-fill-mode: t > erc-stamp-mode: t > erc-netsplit-mode: t > erc-irccontrols-mode: t > erc-noncommands-mode: t > erc-move-to-prompt-mode: t > erc-readonly-mode: t > w3m-fb-mode: t > global-hl-line-mode: t > diff-auto-refine-mode: t > global-company-mode: t > company-mode: t > TeX-PDF-mode: t > TeX-source-correlate-mode: t > flx-ido-mode: t > ido-everywhere: t > global-undo-tree-mode: t > undo-tree-mode: t > global-auto-revert-mode: t > projectile-global-mode: t > projectile-mode: t > tooltip-mode: t > electric-indent-mode: t > mouse-wheel-mode: t > menu-bar-mode: t > file-name-shadow-mode: t > global-font-lock-mode: t > font-lock-mode: t > auto-composition-mode: t > auto-encryption-mode: t > auto-compression-mode: t > column-number-mode: t > line-number-mode: t > auto-fill-function: do-auto-fill > transient-mark-mode: t > > Recent messages: > [2 times] > Buffer is read-only > (emacs gnus type) > Buffer is read-only > Describe-Function... > Making completion list... > Quit > Entering debugger... > Back to top level. > Making completion list... [3 times] > gnus-user-agent > > Load-path shadows: > /home/joakim/.emacs.d/elpa/helm-20151106.2158/helm-multi-match hides > /home/joakim/.emacs.d/elpa/helm-core-20151104.0/helm-multi-match > /home/joakim/.emacs.d/elpa/org-20151005/org-protocol hides > /usr/local/share/emacs/24.5/lisp/org/org-protocol > /home/joakim/.emacs.d/elpa/org-20151005/org-pcomplete hides > /usr/local/share/emacs/24.5/lisp/org/org-pcomplete > /home/joakim/.emacs.d/elpa/org-20151005/org-eshell hides > /usr/local/share/emacs/24.5/lisp/org/org-eshell > /home/joakim/.emacs.d/elpa/org-20151005/org-element hides > /usr/local/share/emacs/24.5/lisp/org/org-element > /home/joakim/.emacs.d/elpa/org-20151005/ob-plantuml hides > /usr/local/share/emacs/24.5/lisp/org/ob-plantuml > /home/joakim/.emacs.d/elpa/org-20151005/ob-picolisp hides > /usr/local/share/emacs/24.5/lisp/org/ob-picolisp > /home/joakim/.emacs.d/elpa/org-20151005/ob-maxima hides > /usr/local/share/emacs/24.5/lisp/org/ob-maxima > 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hides > /usr/local/share/emacs/24.5/lisp/org/ob-js > /home/joakim/.emacs.d/elpa/org-20151005/ob-R hides > /usr/local/share/emacs/24.5/lisp/org/ob-R > /home/joakim/.emacs.d/elpa/org-20151005/org hides > /usr/local/share/emacs/24.5/lisp/org/org > /home/joakim/.emacs.d/elpa/org-20151005/org-list hides > /usr/local/share/emacs/24.5/lisp/org/org-list > /home/joakim/.emacs.d/elpa/org-20151005/org-install hides > /usr/local/share/emacs/24.5/lisp/org/org-install > /home/joakim/.emacs.d/elpa/org-20151005/ob-ditaa hides > /usr/local/share/emacs/24.5/lisp/org/ob-ditaa > /home/joakim/.emacs.d/elpa/org-20151005/org-info hides > /usr/local/share/emacs/24.5/lisp/org/org-info > /home/joakim/.emacs.d/elpa/org-20151005/ob hides > /usr/local/share/emacs/24.5/lisp/org/ob > /home/joakim/.emacs.d/elpa/org-20151005/ox-icalendar hides > /usr/local/share/emacs/24.5/lisp/org/ox-icalendar > /home/joakim/.emacs.d/elpa/org-20151005/ob-sass hides > /usr/local/share/emacs/24.5/lisp/org/ob-sass > /home/joakim/.emacs.d/elpa/org-20151005/org-loaddefs hides > /usr/local/share/emacs/24.5/lisp/org/org-loaddefs > /home/joakim/.emacs.d/elpa/org-20151005/ox hides > /usr/local/share/emacs/24.5/lisp/org/ox > /home/joakim/.emacs.d/elpa/org-20151005/org-clock hides > /usr/local/share/emacs/24.5/lisp/org/org-clock > /home/joakim/.emacs.d/elpa/org-20151005/ob-ruby hides > /usr/local/share/emacs/24.5/lisp/org/ob-ruby > /home/joakim/.emacs.d/elpa/org-20151005/org-bibtex hides > /usr/local/share/emacs/24.5/lisp/org/org-bibtex > /home/joakim/.emacs.d/elpa/emms-20150810.832/tq hides > /usr/local/share/emacs/24.5/lisp/emacs-lisp/tq > > Features: > (shadow bbdb-message mail-extr gnus-msg gnus-art mm-uu mml2015 debug > org-rmail org-mhe org-irc org-info org-gnus org-docview org-bibtex > bibtex org-bbdb org-element org-w3m ispell emacsbug mule-util view > eieio-opt whitespace m4-mode smex sh-script smie executable misearch > multi-isearch vc-git solarized-dark-theme solarized company-files > company-oddmuse company-keywords company-etags company-gtags > company-dabbrev-code company-dabbrev company-capf company-cmake > company-xcode company-clang company-semantic company-eclim company-css > company-nxml company-bbdb emms-mode-line emms-info-ogginfo > emms-info-mp3info emms-player-vlc emms-player-mplayer emms-browser sort > emms-playlist-sort emms-playlist-mode emms-last-played emms-player-mpd > emms-url emms-cache emms-info later-do tq emms-source-playlist > emms-source-file locate emms-player-simple emms-setup emms emms-compat > paren linum-off linum rich-minority f90 fortran cus-edit cus-start > cus-load py-autopep8 company-anaconda anaconda-mode pythonic f python > cwarn company-irony irony-completion irony-snippet irony company-rtags > company-template rtags popup repeat bookmark function-args > semantic-directory semantic/ia etags srefactor subr-x srefactor-ui > recentf tree-widget srecode/semantic semantic/senator semantic/decorate > pulse srecode/insert srecode/filters srecode/args ede/speedbar ede/files > ede ede/base ede/auto ede/source eieio-speedbar speedbar sb-image dframe > eieio-custom srecode/find srecode/map srecode/ctxt srecode/compile > srecode/dictionary srecode/table srecode semantic/doc semantic/bovine/c > hideif semantic/bovine/c-by semantic/lex-spp semantic/bovine/gcc > semantic/dep semantic/bovine semantic/analyze/refs semantic/analyze > semantic/sort semantic/scope semantic/analyze/fcn cc-mode cc-fonts > cc-guess cc-menus cc-cmds cc-styles cc-align cc-engine cc-vars cc-defs > dsvn vc vc-dispatcher magit-blame magit-stash magit-bisect magit-remote > magit-commit magit-sequence magit magit-apply magit-wip magit-log > magit-diff smerge-mode magit-core magit-process magit-popup magit-mode > magit-git magit-section magit-utils git-commit log-edit pcvs-util > add-log with-editor async-bytecomp async tramp-sh tramp tramp-compat > tramp-loaddefs trampver shell comment-dwim-2 origami origami-parsers > semantic/idle semantic/format ezimage semantic/tag-ls semantic/find > semantic/ctxt inversion semantic/db-global semantic/symref/global > semantic/symref semantic/db-find semantic/db-ref cedet-global > semantic/db-mode semantic/db eieio-base semantic/util-modes > semantic/util semantic semantic/tag semantic/lex semantic/fw mode-local > cedet lice mentor xml-rpc url-http tls url-auth url-gw url-scgi > google-translate-smooth-ui google-translate google-translate-default-ui > google-translate-core-ui google-translate-core elfeed-show elfeed-db > elfeed-lib avl-tree elfeed-search elfeed url-queue xml-query > erc-desktop-notifications notifications erc-list erc-menu erc-join > erc-ring erc-networks erc-pcomplete erc-track erc-match erc-button > erc-fill erc-stamp erc-netsplit erc-goodies erc erc-backend erc-compat > gnutls weechat-complete weechat-button weechat weechat-color rx > weechat-relay bindat weechat-core s ucs-normalize conkeror-minor-mode > w3m-lnum w3m-search w3m doc-view jka-compr image-mode w3m-hist w3m-fb > bookmark-w3m w3m-ems w3m-ccl ccl w3m-favicon w3m-image w3m-proc w3m-util > eww-lnum eww mm-url url url-proxy url-privacy url-expand url-methods > url-history url-cookie url-domsuf url-util shr browse-url bbdb-mua > bbdb-com bbdb bbdb-site timezone notmuch hl-line notmuch-message > notmuch-maildir-fcc notmuch-hello notmuch-tree notmuch-show > notmuch-print notmuch-crypto notmuch-mua notmuch-address notmuch-company > notmuch-parser notmuch-wash diff-mode coolj notmuch-query goto-addr > icalendar diary-lib diary-loaddefs notmuch-tag notmuch-lib mm-view > mml-smime smime dig mailcap nnir gnus-sum gnus-group gnus-undo nnmail > mail-source nnoo mbsync smtpmail sendmail gnus-sync gnus-start gnus-spec > gnus-int gnus-range message idna rfc822 mml mml-sec mm-decode mm-bodies > mm-encode mail-parse rfc2231 rfc2047 rfc2045 ietf-drums mailabbrev > gmm-utils mailheader gnus-win json gnus gnus-ems nnheader mail-utils > wid-edit company-math math-symbol-lists company-auctex yasnippet company > pcase latex tex-style tex dbus xml crm swiper ivy delsel ffap url-parse > auth-source gnus-util mm-util mail-prsvr password-cache url-vars idomenu > imenu ace-link ace-window em-smart esh-var esh-io esh-cmd esh-opt > esh-ext esh-proc esh-arg eldoc esh-groups eshell esh-module esh-mode > esh-util multi-term term disp-table ehelp flx-ido flx ido avy-zap avy > move-text undo-tree diff hydra lv multiple-cursors > mc-hide-unmatched-lines-mode mc-separate-operations > rectangular-region-mode mc-mark-pop mc-mark-more mc-cycle-cursors > mc-edit-lines multiple-cursors-core rect org-table misc > programmers-dvorak quail edmacro kmacro dired+ image-dired image-file > dired-aux dired-x server pinentry autorevert filenotify projectile grep > compile ibuf-ext ibuffer dash thingatpt ignoramus el-get > el-get-autoloading el-get-list-packages el-get-dependencies el-get-build > el-get-status pp el-get-methods el-get-fossil el-get-svn el-get-pacman > el-get-github-zip el-get-github-tar el-get-http-zip el-get-http-tar > el-get-hg el-get-go el-get-git-svn el-get-fink el-get-emacswiki > el-get-http el-get-notify help-mode el-get-emacsmirror el-get-github > el-get-git el-get-elpa el-get-darcs el-get-cvs el-get-bzr el-get-brew > el-get-builtin el-get-apt-get el-get-recipes el-get-byte-compile > el-get-custom el-get-core autoload lisp-mnt dired finder-inf org advice > org-macro org-footnote org-pcomplete pcomplete org-list org-faces > org-entities time-date noutline outline easy-mmode org-version > ob-emacs-lisp ob ob-tangle ob-ref ob-lob ob-table ob-exp org-src ob-keys > ob-comint comint ansi-color ring ob-core ob-eval org-compat org-macs > org-loaddefs format-spec find-func cal-menu calendar cal-loaddefs > tex-site eieio byte-opt bytecomp byte-compile cl-extra cconv eieio-core > help-fns cl-macs cl gv cl-loaddefs cl-lib info easymenu package > epg-config tooltip electric uniquify ediff-hook vc-hooks lisp-float-type > mwheel x-win x-dnd tool-bar dnd fontset image regexp-opt fringe > tabulated-list newcomment lisp-mode prog-mode register page menu-bar > rfn-eshadow timer select scroll-bar mouse jit-lock font-lock syntax > facemenu font-core frame cham georgian utf-8-lang misc-lang vietnamese > tibetan thai tai-viet lao korean japanese hebrew greek romanian slovak > czech european ethiopic indian cyrillic chinese case-table epa-hook > jka-cmpr-hook help simple abbrev minibuffer nadvice loaddefs button > faces cus-face macroexp files text-properties overlay sha1 md5 base64 > format env code-pages mule custom widget hashtable-print-readable > backquote make-network-process dbusbind gfilenotify dynamic-setting > system-font-setting font-render-setting move-toolbar gtk x-toolkit x > multi-tty emacs) > > Memory information: > ((conses 16 1027147 421321) > (symbols 48 76509 1) > (miscs 40 863 1582) > (strings 32 207041 118087) > (string-bytes 1 6146562) > (vectors 16 147798) > (vector-slots 8 3193259 446740) > (floats 8 17152 16902) > (intervals 56 10608 3318) > (buffers 960 31)) >
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Paul Eggert <eggert <at> cs.ucla.edu>:Joakim Jalap <joakim.jalap <at> fastmail.com>:Message #17 received at 22385-done <at> debbugs.gnu.org (full text, mbox):
From: Paul Eggert <eggert <at> cs.ucla.edu> To: Joakim Jalap <joakim.jalap <at> fastmail.com> Cc: Gabriele Svelto <gabriele.svelto <at> gmail.com>, 22385-done <at> debbugs.gnu.org Subject: Re: 24.5; Build failure with modules on OpenBSD Date: Sun, 17 Jan 2016 14:30:46 -0800
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Thanks for reporting the problem. The OpenBSD compiler warnings about strcpy etc. are false alarms, and these false alarms confuse the Emacs build procedure and therefore introduce bugs into the Emacs module code. We're lucky that a run-time assertion caught this. I installed the attached patch into the emacs-25 branch. It removes the offending test in 'configure', and so should fix the bug so I am boldly marking it as done. Please give the fix a try; if it doesn't work I can unmark the bug. Is there some way to tell the OpenBSD C compiler to not chatter about uses of strcpy, strcat, and sprintf? We don't want to use the OpenBSD-suggested replacements in Emacs, as that would be more likely to introduce bugs than to fix them. If we can suggest (or get 'configure' to use) a build-time option to suppress the false alarms that would save everybody some work and would help make Emacs more reliable. Although the OpenBSD porting problem with AX_GCC_VAR_ATTRIBUTE no longer affects Emacs, it might affect other programs that use that macro, so I'll CC: this to the macro's author Gabriele Svelto. Gabriele, the bug report is here: http://bugs.gnu.org/22385
[0001-Port-cleanup-attribute-to-OpenBSD.patch (text/x-diff, attachment)]
bug-gnu-emacs <at> gnu.org:bug#22385; Package emacs.
(Mon, 18 Jan 2016 00:12:02 GMT) Full text and rfc822 format available.Message #20 received at 22385-done <at> debbugs.gnu.org (full text, mbox):
From: Gabriele Svelto <gabriele.svelto <at> gmail.com> To: Paul Eggert <eggert <at> cs.ucla.edu>, Joakim Jalap <joakim.jalap <at> fastmail.com> Cc: 22385-done <at> debbugs.gnu.org Subject: Re: 24.5; Build failure with modules on OpenBSD Date: Mon, 18 Jan 2016 00:58:30 +0100
Hello Paul, thanks for getting in touch about this. There's a way to fix this issue in my macro and it's by running the test twice with and without the attribute and comparing the compiler error output instead of simply assuming that any error output means that the attribute is not supported. It's something I had considered doing in the beginning but deemed unnecessarily complicated at the time. Turns out I was wrong; I'll try to push a fix into autoconf-archive in the next few days. Gabriele On 17/01/2016 23:30, Paul Eggert wrote: > Thanks for reporting the problem. The OpenBSD compiler warnings about > strcpy etc. are false alarms, and these false alarms confuse the Emacs > build procedure and therefore introduce bugs into the Emacs module code. > We're lucky that a run-time assertion caught this. > > I installed the attached patch into the emacs-25 branch. It removes the > offending test in 'configure', and so should fix the bug so I am boldly > marking it as done. Please give the fix a try; if it doesn't work I can > unmark the bug. > > Is there some way to tell the OpenBSD C compiler to not chatter about > uses of strcpy, strcat, and sprintf? We don't want to use the > OpenBSD-suggested replacements in Emacs, as that would be more likely to > introduce bugs than to fix them. If we can suggest (or get 'configure' > to use) a build-time option to suppress the false alarms that would save > everybody some work and would help make Emacs more reliable. > > Although the OpenBSD porting problem with AX_GCC_VAR_ATTRIBUTE no longer > affects Emacs, it might affect other programs that use that macro, so > I'll CC: this to the macro's author Gabriele Svelto. Gabriele, the bug > report is here: > > http://bugs.gnu.org/22385
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(Mon, 15 Feb 2016 12:24:04 GMT) Full text and rfc822 format available.
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