GCC Bugzilla – Bug 761
Undocumented options, part 1
Last modified: 2005-01-03 16:55:29 UTC
There are many command line options that have managed to get into GCC without documentation in the Texinfo manual. These include the following; this list covers only the driver, back-end architecture-independent options, and the C compiler. Even if some are only intended for internal or debugging use (or placeholders for future use) they should still be documented: many such options already are. -dumpspecs -dumpversion -dumpmachine -print-multi-lib -print-multi-directory -aux-info -fsched-verbose -feliminate-dwarf2-dups -fsched-interblock -fsched-spec -fsched-spec-load -fsched-spec-load-dangerous -fbranch-count-reg -fnew-exceptions -fsjlj-exceptions -fasynchronous-exceptions -freorder-blocks -fpeephole2 -fbounded-pointers -fbounds-check -ftime-report -fmem-report -fpreprocessed -Wmissing-braces Release: 2.97 20001108 (experimental) Environment: System: Linux decomino 2.2.17 #1 Mon Sep 4 20:22:16 UTC 2000 i686 unknown Architecture: i686 host: i686-pc-linux-gnu build: i686-pc-linux-gnu target: i686-pc-linux-gnu How-To-Repeat: Observe such an option in the source or a Makefile or --help output; try and fail to find any explanation in the manual of exactly what it does.
Fix: Add documentation for all the above options to the manual. Don't add new options without being sure to add documentation at the same time.
State-Changed-From-To: open->analyzed State-Changed-Why: Confirming my own PR. Some of these options have since been documented. The following haven't: -print-multi-lib -print-multi-directory -aux-info -fsched-verbose -feliminate-dwarf2-dups -fsched-interblock -fsched-spec -fsched-spec-load -fsched-spec-load-dangerous -fbranch-count-reg -fnon-call-exceptions -freorder-blocks -fpeephole2 -fbounded-pointers -fbounds-check -fpreprocessed
From: jsm28@gcc.gnu.org To: gcc-gnats@gcc.gnu.org, jsm28@cam.ac.uk, nobody@gcc.gnu.org Cc: Subject: Re: c/761 Date: 20 May 2001 23:42:15 -0000 Synopsis: Undocumented options, part 1 State-Changed-From-To: open->analyzed State-Changed-By: jsm28 State-Changed-When: Sun May 20 16:42:15 2001 State-Changed-Why: Confirming my own PR. Some of these options have since been documented. The following haven't: -print-multi-lib -print-multi-directory -aux-info -fsched-verbose -feliminate-dwarf2-dups -fsched-interblock -fsched-spec -fsched-spec-load -fsched-spec-load-dangerous -fbranch-count-reg -fnon-call-exceptions -freorder-blocks -fpeephole2 -fbounded-pointers -fbounds-check -fpreprocessed http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view&pr=761&database=gcc
Responsible-Changed-From-To: unassigned->aoliva Responsible-Changed-Why: Documented -print-multi-directory, -print-multi-lib and -aux-info
Responsible-Changed-From-To: aoliva->unassigned Responsible-Changed-Why: That's all for now.
State-Changed-From-To: analyzed->feedback State-Changed-Why: Joseph, could you update the list of still undocumented options? Many of those here have been documented. Probably best to open in a new PR, as this PR is getting long and twisty.
From: "Joseph S. Myers" <jsm28@cam.ac.uk> To: <neil@gcc.gnu.org>, Joseph Myers <jsm28@cam.ac.uk>, <gcc-gnats@gcc.gnu.org> Cc: Subject: Re: c/761: Undocumented options, part 1 Date: Mon, 25 Mar 2002 10:24:01 +0000 (GMT) On 25 Mar 2002 neil@gcc.gnu.org wrote: > Synopsis: Undocumented options, part 1 > > State-Changed-From-To: analyzed->feedback > State-Changed-By: neil > State-Changed-When: Mon Mar 25 01:00:29 2002 > State-Changed-Why: > Joseph, could you update the list of still undocumented options? > Many of those here have been documented. Probably > best to open in a new PR, as this PR is getting long and twisty. I'll produce a new list at some point, if someone else doesn't do so first, but probably not for some months. -- Joseph S. Myers jsm28@cam.ac.uk
State-Changed-From-To: feedback->analyzed State-Changed-Why: The following is a current list of undocumented options: --version -feliminate-dwarf2-dups -fsched-interblock -fsched-spec -fsched-spec-load -fsched-spec-load-dangerous -fbranch-count-reg -funsafe-profile-arcs -fbounded-pointers -fbounds-check -fsched-verbose
State-Changed-From-To: analyzed->closed State-Changed-Why: Everything mentioned previously appears to be documented or removed. If new undocumented options are discovered or created, open a new bug.
From: sayle@gcc.gnu.org To: gcc-gnats@gcc.gnu.org Cc: Subject: c/761 Date: 20 Oct 2002 19:18:30 -0000 CVSROOT: /cvs/gcc Module name: gcc Changes by: sayle@gcc.gnu.org 2002-10-20 12:18:30 Modified files: gcc : ChangeLog toplev.c flags.h c-opts.c gcc/doc : invoke.texi Log message: PR c/761 * toplev.c (flag_unsafe_profile_arcs): Remove. (flag_bounded_pointers): Remove. (flag_bounds_check): Correct comments. (lang_independent_options): Remove -funsafe-profile-arcs and -fbounded-pointers. Correct -fbounds-check comments. * flags.h: Correct flag_schedule_interblock comments. (flag_bounded_pointers): Remove prototype. (flag_bounds_check): Correct comments. * c-opts.c (c_common_init_options): No need to mark flag_bounds_check as unspecified. (c_common_post_options): And no need to set it from flag_bounded_pointers if its still unspecified. * doc/invoke.texi: Fix some overfull hboxes in "make dvi". Document --version, -feliminate-dwarf-2-dups, -fno-sched-interblock, -fno-sched-spec, -fsched-spec-load, -fsched-spec-load-dangerous, -fsched-verbose=n, -fno-branch-count-reg and -fbounds-check. Patches: http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=1.15733&r2=1.15734 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/toplev.c.diff?cvsroot=gcc&r1=1.682&r2=1.683 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/flags.h.diff?cvsroot=gcc&r1=1.92&r2=1.93 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/c-opts.c.diff?cvsroot=gcc&r1=1.21&r2=1.22 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/doc/invoke.texi.diff?cvsroot=gcc&r1=1.195&r2=1.196
From: sayle@gcc.gnu.org To: gcc-gnats@gcc.gnu.org Cc: Subject: c/761 Date: 23 Oct 2002 13:38:29 -0000 CVSROOT: /cvs/gcc Module name: gcc Branch: gcc-3_2-branch Changes by: sayle@gcc.gnu.org 2002-10-23 06:38:29 Modified files: gcc : ChangeLog gcc/doc : invoke.texi Log message: PR c/761 * doc/invoke.texi: Fix some overfull hboxes in "make dvi". Document --version, -fno-sched-interblock, -fno-sched-spec, -fsched-spec-load, -fsched-spec-load-dangerous, -fsched-verbose=n, -fno-branch-count-reg and -fbounds-check. Patches: http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-3_2-branch&r1=1.13152.2.657.2.101&r2=1.13152.2.657.2.102 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/doc/invoke.texi.diff?cvsroot=gcc&only_with_tag=gcc-3_2-branch&r1=1.119.2.12.4.6&r2=1.119.2.12.4.7