add pkg-config support

[Dmitrii Pasechnik]

It's not clear at all how to divine the version of m4rie in a platform-independent way, once it is installed on a system, e.g. on Debian via apt install libm4rie-dev.

This is desirable in view of e.g. https://trac.sagemath.org/ticket/27330

It’s very easy to add such support using autotools, as you might know.

[Martin Albrecht]

add pkg-config support

fixes #18

→ <<cset d832744df1c5>>

[Martin Albrecht]

Let me know if this works for you. I can then cut a new release.

[Dmitrii Pasechnik]

On Thu, Aug 15, 2019 at 04:07:06PM +0000, Martin Albrecht wrote:

looks a bit funny that you can openmp compile flags in, but no openmp library to link against.

[Dmitrii Pasechnik]

looks good to me otherwise. (For Sage’s purposes, openmp is not relevant, one way or another).

[Martin Albrecht]

AFAIK there is no openmp library to link against, cf. https://www.dartmouth.edu/~rc/classes/intro_openmp/compile_run.html

[Dmitrii Pasechnik]

On Sat, Aug 17, 2019 at 11:42:51AM +0000, Martin Albrecht wrote: there normally is one, e.g. on Debian Linux it is called libgomp1, it's just not linked in a "normal" way for some reason, but instead via that -fopenmp compiler option... But you're right, it's only a de facto dependence, not a de jure one :-)