pmerge --pretend --verbose
[ebuild N ] sci-libs/sundials-5.8.0:0/5::gentoo USE="int64 openmp static-libs threads -doc -examples -fortran -hypre -lapack -mpi -sparse -superlumt" 22.9 MiB
Total: 1 package (1 new), Size of downloads: 22.9 MiB
* Running sanity checks...
>>> sci-libs/sundials-5.8.0: failed pkg_pretend
/Volumes/Disk 1/gentoo-prefix/usr/lib/pkgcore/lib/pkgcore/ebd/.generated/libs/8/pkg_pretend: line 144: [[: invalid regular expression `': empty (sub)expression
* ERROR: sci-libs/sundials-5.8.0:: failed (pretend phase):
* USE flag 'openmp' not in IUSE for sci-libs/sundials-5.8.0
*
* Call stack:
* isolated-functions.bash, line 333: called pkg_pretend
* ebuild.bash, line 1985: called use 'openmp'
* pkg_pretend, line 145: called die
*
* Working directory: '/var/tmp/portage'
!!! Sanity checks failed, exiting...
- Wall time
- 0.735 s vs. 0.009 s for portage-ng