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Build fails with:
configure: error: Cannot find LAPACK libraries
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I had the same problem when trying to emerge scipy, which depends on arpack.
I found the following tread in the forum: https://forums.gentoo.org/viewtopic-p-7224504.html
I run the command
emerge -O blas-reference::gentoo cblas-reference::gentoo lapack-reference::gentoo
and then I was able to emerge arpack successfully.
But now the scipy package, which is the actual package I want to install (it depends on arpack), does fail during emerge. Not sure if this problem is independent or not.
it is still an issue at unstable amd64 tinderbox image 17.1-systemd_libressl-test_20190623-103445
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Wow, thanks for the update. At this point, I can no longer remember why I was trying to install it, even. :-(