mjsML commented on issue #17181: Fail to build mxnet from source URL: https://github.com/apache/incubator-mxnet/issues/17181#issuecomment-573903782 This issue happens on 18.04 too (this is my OS at the moment) ... I think it depends which subversion of ubuntu you have ... This is a very old install of 18.04 (probably 18.04.00 or the likes) ... and given I have not updated OpenBLAS explicitly it happened on 18.04 too .. according to the build guide from OpenBLAS the core issue is some symbols don't make it if you don't compile with the dynamicarch flag (so even if you have the most recent build but you didn't use this flag you'd get the same error.)
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