[MacPorts] #68689: CMake no longer finds OpenBLAS

[MacPorts]

#68689: CMake no longer finds OpenBLAS
----------------------+-----------------------------
 Reporter:  szhorvat  |      Owner:  (none)
     Type:  defect    |     Status:  new
 Priority:  Normal    |  Milestone:
Component:  ports     |    Version:
 Keywords:            |       Port:  openblas, cmake
----------------------+-----------------------------
 CMake is no longer finding OpenBLAS and I am not sure why.

 I am using:

 {{{
 OpenBLAS @0.3.24 (math, science)
 cmake @3.24.4 (devel)
 }}}

 Fully updated ports tree, no local modifications.

 Test CMake project:

 ```
 cmake_minimum_required(VERSION 3.24)
 project(Foo)
 find_package(BLAS REQUIRED)
 message(STATUS BLAS found: ${BLAS_LIBRARIES})
 ```

 Configure it with `cmake -DBLA_VENDOR=OpenBLAS
 -DCMAKE_PREFIX_PATH=/opt/local`.  Then it shows the error `Could NOT find
 BLAS (missing: BLAS_LIBRARIES)`

 This used to work not so long ago. I am not sure when it broke. It also
 affects building ports that link to OpenBLAS.

 My system:

 macOS 13.6 22G120 arm64
 Xcode 15.0.1 15A507

-- 
Ticket URL: <https://trac.macports.org/ticket/68689>
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