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49 lines
2.5 KiB
Text
49 lines
2.5 KiB
Text
The following notes apply just for LAPACK built against ATLAS.
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IMPORTANT NOTES:
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1) If you update ATLAS, you MUST also rebuild and reinstall LAPACK, even if
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there is no update available for LAPACK! Otherwise you end up with a
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broken/incomplete LAPACK library!
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2) This SlackBuild conflicts with the lapack.SlackBuild which is meant mainly
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for compilation against the reference BLAS. You may install LAPACK by
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this SlackBuild in parallel with the LAPACK built against the reference BLAS
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if you use the SYS_DESTDIR and DEFAULT_DOCS variables (see below), but then
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you are on your own, especially when compiling other software against LAPACK
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and BLAS/ATLAS.
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3) There are a few extra variables which you may want or need to give
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appropriate values when calling the lapack-atlas.SlackBuild: SYS_DESTDIR,
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DEFAULT_DOCS, USE_ATLAS_PT_LIBS and TEST_LAPACK.
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SYS_DESTDIR is set by default to "/usr" and is the system destination
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directory. When installing the package produced by this SlackBuild,
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LAPACK's files will be written to $SYS_DESTDIR/lib (or lib64).
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Documentation files are written to /usr/doc/lapack-atlas-$VERSION if not
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otherwise stated (see below).
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You may want to change the value of SYS_DESTDIR to avoid conflicts (see
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the notes above). IMPORTANT: SYS_DESTDIR has to have an absolute
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path as value.
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DEFAULT_DOCS has the default value "yes", which means that docs go
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to /usr/doc/lapack-atlas-$VERSION, but you may want to let the docs to
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go to $SYS_DESTDIR/doc/lapack-atlas-$VERSION. For this, just set this
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variable to something like "no".
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USE_ATLAS_PT_LIBS is set by default to "yes" which means that this script
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will try to build LAPACK against the threaded ATLAS libs. On a single
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processor machine these are missing and you will get a WARNING which you
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can ignore, since ATLAS will not create these libraries on such a machine.
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On a multi processor machine the WARNING should not be there and you need to
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set this variable to "no" if you want to force LAPACK to build against the
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single threaded ATLAS libraries. At this point in time this is discouraged
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and you are on your own if you do it, especially when compiling other
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software which depends on LAPACK and ATLAS.
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TEST_LAPACK is set by default to "no" which means that this script will not
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try to run the LAPACK test suite. Set it to "yes" if you want the opposite.
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All these settings may be done the usual way on the command line when
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calling this SlackBuild, you do not have to edit the script.
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