Handle the possibility of OpenBLAS not including LAPACK APIs

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mesonbuild · Jan 8, 2023 · a01072d · a01072d
1 parent e213fb4
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diff --git a/docs/markdown/Dependencies.md b/docs/markdown/Dependencies.md
@@ -317,7 +317,7 @@ These dependencies can never be found for non-OSX hosts.
 
 ## BLAS and LAPACK
 
-*(added 0.64.0)*
+*(added 1.1.0)*
 
 Enables compiling and linking against BLAS and LAPACK libraries. BLAS and
 LAPACK are generic APIs, which can be provided by a number of different
@@ -374,6 +374,7 @@ openblas_dep = dependency('openblas',
     'interface: ilp64',   # can be lp64 or ilp64 (or auto?)
     'symbol-suffix: 64_', # check/auto-detect? default to 64_ or no suffix?
     'cblas',
+    'lapack',             # OpenBLAS can be built without LAPACK support
   ]
 )
 

diff --git a/mesonbuild/dependencies/blas_lapack.py b/mesonbuild/dependencies/blas_lapack.py
@@ -47,6 +47,8 @@
 Other Notes:
 
 - OpenBLAS can be built with NOFORTRAN, in that case it's CBLAS + f2c'd LAPACK
+- OpenBLAS can be built without LAPACK support, Arch Linux currently does this
+  (see https://github.com/scipy/scipy/issues/17465)
 - OpenBLAS library can be renamed with an option in its Makefile
 - Build options:
     - conda-forge: https://github.com/conda-forge/openblas-feedstock/blob/49ca08fc9d1ff220804aa9b894b9a6fe5db45057/recipe/conda_build_config.yaml