[Buildroot] ccache issue with zlib dependency

[Arnout Vandecappelle <arnout@mind.be>]

On Saturday 11 February 2012 00:36:04 Felipe Contreras wrote:
> Hi,
> 
> I have a newer version of zlib (1.2.6) on my host system than what
> buildroot is using (1.2.5), ultimately the build fails because I have
> enabled ccache, and it uses zlib, and when the older zlib is installed
> there are missing symbols (ZLIB_1.2.5.2), so ccache doesn't work any
> more, and everything else fails.
> 
> I tried to add the zlib dependency to ccache, but the build also fails
> because apparently host-zlib tries to use ccache.

 As a workaround, you can add CC="$(HOSTCC_NOCCACHE)" to the build
commands of host-zlib.  But I don't particularly like it.

 Another option is to force ccache to use its bundled zlib, by adding
ccache_cv_zlib_1_2_3=no to HOST_CCACHE_CONF_ENV.

 The best option would be to check in support/dependencies if the
system has a good zlib, and only build host-zlib if it doesn't.  But
that's major surgery in the build system again.

 Regards,
 Arnout


-- 
Arnout Vandecappelle                               arnout at mind be
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