Move to pkg-config

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Clement Pernet

Jul 8, 2016, 6:49:54 AM7/8/16

A few months ago, we have introduced pkg-config files (*.pc) to have linbox, fflas-ffpack and givaro
export their compilation flags in a simple uniform and easy to use way:

once installed, you simply need to run
pkg-config linbox --cflags
to get the compilation flags of linbox
pkg-config fflas-ffpack --libs
to get the linking flags of fflas-ffpack.

This is very similar to the scripts that we are also shipping, but the pkg config
system is becoming standard and is for example used extensively in SageMath to configure the lib

As a second step, I changed the way the dependencies of LinBox to fflas-ffpack and fflas-ffpack to
givaro and handled, by disabling the former m4 scripts, performing compilation based tests, and
replacing them with the simpler and faster PKG_CHECK_MODULES macro.

This change may result in a failure to configure on your system for the 2 following cases:

1/ you do not have pkg-config install on your system.
apt-get install pkgconf
should solve it.
2/ you have installed the dependency (say givaro) to a specific folder (outside /usr/local) and
pkg-config fails to find the givaro.pc file
you should update the search path of pkg-config with something like
export PKG_CONFIG_PATH=${PKG_CONFIG_PATH}:<dependency-prefix>/lib/pkgconfig

Please let me know by replying to this thread if you have any problem with this change.



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