[Bug preprocessor/51067] New: cpp.texi Line Control node not mentioning #, trailing integers

[Bug preprocessor/51067] New: cpp.texi Line Control node not mentioning #, trailing integers

[karl at freefriends dot org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51067

             Bug #: 51067
           Summary: cpp.texi Line Control node not mentioning #, trailing
                    integers
    Classification: Unclassified
           Product: gcc
           Version: 4.6.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: preprocessor
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: karl@freefriends.org


In the Line Control node in cpp.texi, I do not see any mention of the
(long-used) form
# 1 "foo.c"
That is, # instead of #line.

Also, I do not see any description of the trailing integers now sometimes
present in the CPP output, as in:
# 1 "/usr/include/bits/sys_errlist.h" 1 3 4

(I looked around in the rest of the manual and other manuals too, to no avail. 
If the info is present elsewhere, at least an xref from Line Control would seem
useful.)

Thanks,
Karl

[Bug preprocessor/51067] cpp.texi Line Control node not mentioning #, trailing integers

[joseph at codesourcery dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51067

--- Comment #1 from joseph at codesourcery dot com <joseph at codesourcery dot com> 2011-11-09 19:45:32 UTC ---
On Wed, 9 Nov 2011, karl at freefriends dot org wrote:

> Also, I do not see any description of the trailing integers now sometimes
> present in the CPP output, as in:
> # 1 "/usr/include/bits/sys_errlist.h" 1 3 4

See "Preprocessor Output" in cpp.texi.

@cindex linemarkers
Source file name and line number information is conveyed by lines
of the form

@smallexample
# @var{linenum} @var{filename} @var{flags}
@end smallexample
[...]

[Bug preprocessor/51067] cpp.texi Line Control node not mentioning #, trailing integers

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51067

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> 2011-11-09 19:49:05 UTC ---
http://gcc.gnu.org/onlinedocs/gcc-4.6.2/cpp/Preprocessor-Output.html#Preprocessor-Output

[Bug preprocessor/51067] cpp.texi Line Control node not mentioning #, trailing integers

[karl at freefriends dot org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51067

--- Comment #3 from karl at freefriends dot org 2011-11-09 23:10:09 UTC ---
> See "Preprocessor Output" in cpp.texi.

Thanks much.  That's all the information, for sure.  Glad to see it.  may I
suggest an xref in Line Control?

[Bug preprocessor/51067] cpp.texi Line Control node not mentioning #, trailing integers

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51067

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |INVALID

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> 2012-01-06 00:38:00 UTC ---
This is already documented so no need to add documentation (again).

[Bug preprocessor/51067] cpp.texi Line Control node not mentioning #, trailing integers

[karl at freefriends dot org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51067

--- Comment #5 from karl at freefriends dot org 2012-01-06 22:43:44 UTC ---
may I suggest an xref in Line Control?  That was the obvious place to look.  To
me.