Re: grep rebuild?

[Corinna Vinschen <corinna-cygwin@cygwin.com>]

On Mar 17 10:03, Corinna Vinschen via Cygwin-apps wrote:
> On Mar 16 18:50, Brian Inglis via Cygwin-apps wrote:
> > On 2023-03-16 10:50, Brian Inglis via Cygwin-apps wrote:
> > > On 2023-03-16 06:08, Corinna Vinschen via Cygwin-apps wrote:
> > > > Hi Brian,
> > > > 
> > > > there's a problem with the grep package.  It uses the internally
> > > > provided GNULIB regex library.
> > > > 
> > > > Unfortunately, that's the default if the system doesn't provide a more
> > > > recent GLibc.  Which we'll never do.  The problem is this: Native
> > > > language support in GNULIB's regex is *only* available, if it's built as
> > > > part of GLibc.
> > > > 
> > > > I'd like to ask you to rebuild grep 3.9 with the
> > > > --without-included-regex option.
> > > > 
> > > > That will allow grep to use Cygwin's own regex, which already comes with
> > > > basic native language support, and which I'm working on to sbetter
> > > > support equivalence class and collation symbol expressions.
> > > 
> > > Hi Corinna,
> > > 
> > > We discussed this and I was going to release grep 3.8 test release 3,
> > > for testing with snapshots or when Cygwin 3.5.0 is released, then grep
> > > 3.9 came out, and I realized grep is updated every few months, so that
> > > went on the back burner. I can do a test release for 3.9-2 with that
> > > configuration change.
> > > 
> > > The current release passes all the class tests and works for me and Andrey.
> > > Are there any other implications of language support affecting grep?
> > 
> > Config option --without-included-regex no longer seems to build with grep
> > 3.9 on Cygwin - may require glibc regex - or may now autoconfig depending on
> > [g]libc?
> > 
> > /usr/lib/gcc/x86_64-pc-cygwin/11/../../../../x86_64-pc-cygwin/bin/ld:
> > dfasearch.o: in function `regex_compile':
> > /usr/src/debug/grep-3.9-2/src/dfasearch.c:159: undefined reference to
> > `re_set_syntax'
> 
> What a piece of crap!  So you either run a GLibc system, or you're
> forced to use GNULIB regex because grep uses non-standard functions
> in the generic code.
> 
> We should switch to FreeBSD grep, it still uses POSIX functions.
> What a laugh...

And just for kicks, FreeBSD grep is mostly option compatible with
GNU grep.  The missing options are:

  -P, --perl-regexp
  --no-ignore-case	(but --ignore-case exists)
  -y			(obsolete anyway)
  -T, --initial-tab
  -Z			(but --null exists)
  --group-separator
  --no-group-separator
  --exclude-from
  -I			(but --binary-files exists)
  -R, --dereference-recursive

I wonder if I should create a freebsd-grep package, installing
its grep as 'bsdgrep' or something....


Corinna