Re: additional problem

[David Henderson <dhenderson@digital-pipe.com>]

On 06/30/2011 01:34 PM, alex dot baldacchino dot alsasub at gmail dot 
com wrote:
> 2011/6/29 David Henderson<dhenderson@digital-pipe.com>:
>> Hi gang!  I've successfully been able to compile the alsa-utils package
>> with the "--with-alsa-inc-prefix=/opt/staging/alsa/var/share/include
>> --with-alsa-prefix=/opt/staging/alsa/lib", but the problem I'm having
>> now is that the compiled binaries are looking for those directories
>> during run-time and not just compile-time.  Does anyone have any
>> thoughts on using those directories for package creation, but that the
>> software doesn't use the '/opt/staging/alsa' prefix during run-time?
>>
>> Thanks,
>> Dave
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>> Alsa-devel@alsa-project.org
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>>
>
> Do you have a full build environment under /opt/staging? If so, you
> could try to chroot there and configure your software 'normally'
> instead of passing those parameters... or passing those paths starting
> from '/' instead of '/opt/staging/' (provided that the final
> installation will match them, e.g. binaries will look into
> '/var/share/include' and /lib)... it might work...
>
> If you missed something from the 'real' environment, you could try
> (before chroot'ing) to create (hard) links to those paths within a
> 'local' dir (e.g. create dir /opt/staging/extern/ and therein link to
> /bin, /sbin, /usr/bin etc.) then arrange to have these 'local' paths
> listed (after chroot'ing) at the end of your PATH env variable. You
> would need at least a working /opt/staging/bin/sh and perhaps some
> symlinks, such as a 'lib' pointing to "/alsa/lib" and a 'var' pointing
> to "/alsa/var", but if such names exist as directories you could need
> links to each file/subdirectory, perhaps a script could help you
> creating them on the fly (after chroot'ing) once you knew what you
> need (e.g. if you need stuff in alsa/var/share/include, arrange your
> script to work, for instance, with 'alsa' as first parameter and
> var/share/include as second parameter, then mkdir -p var/share/include
> and symlink to alsa/var/share/include/<whatever>  - if there are
> subdirs therein, mkdir -p instead of symlinking and move in depth,
> just in case you needed something from a different
> <name>/var/share/include/<inner_name>/*). You might also need
> (sym)links to stuff in extern/<somedir>/ - such a 'dynamic' build
> environment may become hard to create and handle, more than a full
> build env for creating a distro from scratch, unless that's what
> you're doing, just using some code and configurations from an existing
> distro, in which case maybe you have a full build env yet, so just
> chroot, compile and install everything both with DESTDIR (to create a
> package later) and 'normally' (to have include and lib files easy to
> reuse to match dependencies for building other software).
>
> Or... put your hands into alsa-utils'
> autogen/automake/configure/script files (if you want an automated
> process to reuse, or just modify the generated Makefile, if enough)
> and customize them to achieve what you aim, e.g. setting different -L
> and -rpath wherever needed, or set and export a global LDFLAGS, taking
> care to include every library needed and correct paths (use the
> generated Makefile as a hint), again with different -L and -rpath...
> or perhaps all you need could be setting the final dirs to look into
> at runtime in LD_RUN_PATH, in which case you could configure your
> build as you've done successfully until now, then export (for
> instance) LD_RUN_PATH=/lib (use the correct path, if you need to
> include more than one path for shared objects, separate them with a
> colon, e.g. LD_RUN_PATH=/lib:/var/lib - if I didn't misunderstand, you
> have some stuff in /var that usually is in /usr/*), then make etc. The
> latter choice might be the easier, so give it a try, but might not
> work if your generated Makefile contains -rpath in LDFLAGS...
>
> Regards.
>
> Alex

Currently I am building a distro from scratch with all the software 
"installed" to /opt/staging/os - so I guess I do have a build 
directory.  I should be able to chroot into that directory and have 
everything work correctly (as far as dependencies and such) since I boot 
to the very same dir hierarchy (obviously minus the /opt/staging/os 
prefix).  I haven't had to do it with any of the software I've compiled 
so far, but have a few questions regarding this practice.  If I chroot 
into that directory before compiling the software, how will I make all 
the necessary changes (e.g. PATHs, env values, etc) that are required 
for the build directory as there are quite a bit of large differences 
between the main OS and the one I'm building?  Also, when chroot'ing, it 
shouldn't make any changes to the current main OS correct?  For example, 
if I open a terminal window and chroot there, it won't affect the rest 
of the OS correct?  Forgive my ignorance, but I've never had to use 
chroot and I couldn't find any related info in the man page.

Thanks,
Dave