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I am trying in install a program called PSI3. It apparently requires that I have BLAS, which I have added following these steps. I added BLAS to the environment; tail $BLAS works.

And yet I keep getting configure: error: "Did not find a BLAS library." whenever I run ./configure. Google seems to know little about this error, so I'm stuck here, hoping you can help me...

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Have you tried installing libblas-dev through apt-get? Also there is another library (libatlas-base-dev) which may suit you. –  Salem Mar 17 '13 at 22:16
Thanks, that second one got me past this error (and to the next one)! Post it as an answer if you want an accept. –  Mark Mar 18 '13 at 0:05
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