Auto-add "-fno-second-underscore" option to make LAPACKE compile (as it calls LAPACK functions that may have gotten a second underscore added otherwise). Also support -R for rpath when parsing compiler directives in f_check
1. the already deprecated -openmp option was removed in 2018, switch to -fopenmp
2. add leading blank in search for "zho_ge__" symbol to work around misleading tags in the 2018 assembly
Expected to fix#1548
- retry fortran compiler test with aix-specific option if generic -m32/-m64 fails
- pass any custom ARFLAGS to lapack
- no addition of -m32/-m64 to the CFLAGS and FFLAGS on AIX
Without proper recognition of gfortran versions such as
> GNU Fortran (GCC) 4.9.x 20150123 (prerelease)
OpenBLAS assumes the presence of the G77 compiler. Consequently,
`-lgfortran` is missing from the pkg-config file.
The aforementioned compiler is the gfortran compiler in the Android repo
in a commit tagged as `ndk-r14`, cf. Paul Mustière's gfortran build
instructions for Android at https://github.com/buffer51/android-gfortran
On FreeBSD, passing extra options to `which` causes it to report a non-zero status:
```
$ which gfortran48 -m64
/usr/local/bin/gfortran48
$ echo $?
1
```
```
$ which gfortran48
/usr/local/bin/gfortran48
$ echo $?
0
```
Martin Kroeker
luz.paz
François Bissey
Christoph Conrads
Paul Osmialowski
Shivraj Patil
Zhang Xianyi
Vicente Olivert Riera
Lauri Tirkkonen
Mike Nolta
Timothy Gu
Zaheer Chothia
Xianyi Zhang