Mac OS X and pkg-config

[Stephan Bergmann]

On 06/11/2015 01:42 PM, David Tardon wrote:
> Actually, I just found out that this can be a problem on OS X as well. A
> recent build of master fails in liborcus if there is boost installed
> from Homebrew. Because, unfortunately, Homebrew installs stuff into
> /usr/local and the boost.m4 script used by liborcus looks there...

...which answers my question

   "And while presence of pkg-config on the PATH might be a good 
heuristic to detect that the environment has been contaminated by 
MacPorts or their like, is polluting PATH the only thing those do (and 
which we would thus need to counter), or are they also polluting in 
other ways that subtly influence the build (and then cause headaches)?"

and implies that 
<http://cgit.freedesktop.org/libreoffice/core/commit/?id=ada6281a5bd74d0ff6ae578d57f39f65b7c25103> 
"configure: make the error message for pkg-config on Mac more 
actionable" fails to take into account my assumption

   "Using presence of pkg-config as a canary to detect polluted 
environments was probably born out of pragmatism.  I guess that there 
are further problems with polluted environments beyond presence of 
pkg-config."