|Status:||Rejected||Start date:||18 Jul 2016|
Found the Linux with fftw3 installed twice:
- in normal way via the package manager in /usr/lib, shared version of the library.
- In /usr/local/fftw3.a, i.e. static version of fftw3 library, probably as some prehistorical remnants.
Our 'cmake' machinery finds static version, and then 'make' fails because of the missed -fPIC compiler key.
[Note: We had in the past similar case with static Python installed in the system. Our cmake was able to distinguish it, and then was adding -fPIC keys automatically (thanks to BornAgainMacros file which is gone by now).]
- Easiest minimal action would be to force 'cmake' to fail, if static fftw3 found.
- May be introduce description in Troubleshooting, explaining the case. Very likely -DCMAKE_PREFIX_PATH=/usr would fix the problem.
- we can repeat a trick with fftw3.a determination and adding -fPIC key
- But then, very likely, it would lead to mixing fftw3 library and headers from different installations.
#4 Updated by wuttke almost 4 years ago
- Status changed from Backlog to Rejected
Searching /usr/local/lib before /usr/lib is intentional, and adequate: it gives the local admin the chance to overrule the distribution.
Inevitably then, the build will fail if /usr/local/lib contains broken "prehistorical remnants". We should live with that, and not attempt to catch all possible problems of this kind.