Mail Archives: cygwin/2005/07/07/21:43:54
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According to Brian Dessent on 7/7/2005 7:15 PM:
> This is a problem with the new bash version 3.0, which is dynamically
> linked to the readline, libiconv, and ncurses DLLs:
>
> The prior version of bash, 2.05b-17, is statically linked:
The problem is that bash 3.0 has grown so much since 2.05b that statically
linking it roughly triples its size, it is already the biggest shell in
/bin, and it cannot be hardlinked to save disk space without complicating
future bash upgrades. I suppose it may be possible to compile two
versions - the full-featured dynamically-linked bash.exe for interactive
use, and the minimally-configured statically-linked sh.exe (keep all POSIX
features like aliases, but strip all extensions like array variables) for
scripts.
Looking at ./configure --help, that would mean using:
- --disable-arith-for-command --disable-array-variables
- --disable-bang-history --disable-cond-command --disable-cond-regexp
- --disable-debugger --disable-directory-stack --disable-disabled-builtins
- --disable-dparen-arithmetic --disable-extended-glob --disable-help-builtin
- --disable-multibyte --disable-net-redirections
- --disable-process-substitution --disable-progcomp
- --disable-prompt-string-decoding --disable-select
- --disable-separate-helpfiles --enable-static-link
I dunno - shipping a static /bin/sh without the full features of bash is
once again going to lead to questions of why a shell script doesn't always
work when people use bash extensions.
>
> This presents a somewhat serious problem for the rebaseall script. It
> can be modified to exclude cyg{intl-3,iconv-2,readline6,ncurses-8}.dll
> but that is not a very good solution, because it means they will not be
> rebased. These DLLs unfortunately are used by lots of programs and I
> fear not rebasing them is a poor solution.
Or, you could make rebaseall a #!/bin/ash script, which would require that
we never kill ash from the distribution, while freeing you from bash's
dynamic linking.
>
> I think we will require a statically linked bash, or some kind of
> trickery in the rebaseall script. One potential way around this might
> be for it to output a .cmd file (or .bat under 9x, grrr) and then exec()
> $COMSPEC to run the commands. This would have the advantage of not
> requiring any Cygwin DLLs in use during the rebase, but it sounds more
> error prone and complicated.
Eww - outputting a .bat to do your work - that doesn't sound very appealing.
- --
Life is short - so eat dessert first!
Eric Blake ebb9 AT byu DOT net
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