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Re: Problems with recent expat/gdb changes


Daniel,

On 6/4/13 10:28 PM, "Daniel Price" <daniel.price@gmail.com> wrote:

>Hi all,
>
>I've had some trouble with the recent trunk commits that change the
>way expat is handled.  A bare-metal mips toolchain I used to be able
>to build using crosstool-ng 0.17 now won't compile after moving to
>trunk crosstool-ng:
>
>[INFO ]  =================================================================
>[INFO ]  Installing cross-gdb
>[EXTRA]    Configuring cross-gdb
>[EXTRA]    Building cross-gdb
>[ERROR]    configure: error: expat is missing or unusable
>[ERROR]    make[2]: *** [configure-gdb] Error 1
>[ERROR]    make[1]: *** [all] Error 2
>[ERROR]
>[ERROR]  >>
>[ERROR]  >>  Build failed in step 'Installing cross-gdb'
>[ERROR]  >>        called in step '(top-level)'
>[ERROR]  >>
>[ERROR]  >>  Error happened in: CT_DoExecLog[scripts/functions@257]
>[ERROR]  >>        called from:
>do_debug_gdb_build[scripts/build/debug/300-gdb.sh@170]
>[ERROR]  >>        called from: do_debug[scripts/build/debug.sh@35]
>[ERROR]  >>        called from: main[scripts/crosstool-NG.sh@632]
>[ERROR]  >>
>[ERROR]  >>  For more info on this error, look at the file: 'build.log'
>[ERROR]  >>  There is a list of known issues, some with workarounds, in:
>[ERROR]  >>
>'/tmp/x86_64-fc15-tools/crosstool-ng/share/doc/crosstool-ng/ct-ng.hg+unkno
>wn-20130604.175703/B
>- Known issues.txt'
>[ERROR]
>
>I have placed the config here:
>https://gist.github.com/danielbprice/5711220
>
>This is on a system where libexpat-dev / -devel isn't installed.
>
>It seems to me that there's an issue where, despite requesting static
>cross-gdb, crosstool-ng

s/crosstool-ng/gdb/

> is expecting libexpat to be on the host
>system... but I think in this case (as in some other cases handled by
>the gdb script), expat should probably be downloaded and linked in by
>crosstool-ng, to avoid a dependency on the host system.  Thanks for
>any input you can provide.

There is definitely some funkyness with expat being needed to be built
here.

I feel that libexpat should be broken out of 300-gdb.sh and into it's own
script and depended on by specific component versions (say gdb >= 7.3) in
Kconfig, so the user can also say if they want expat (which is needed by
python support) or if the version requires it.

I don't think you'll want expat on static cross_gdb, so a short term
solution could be to comment out lines 126 and 127 from
scripts/build/debug/300-gdb.sh. Then rebuild and reinstall ct-ng.

>
>        -dp
>
>--
>Daniel.Price@gmail.com; Twitter: @danielbprice
>
>--
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