Merge pull request #122 from jlblancoc/openblas_generic_linkage

cmake: allow more generic OpenBLAS linkage

CHANGELOG.md

@@ -1,5 +1,8 @@
 # Unreleased
 
+# unreleased
+- More generic `OpenBLAS` linkage [#122](https://github.com/jlblancoc/suitesparse-metis-for-windows/pull/122)
+
 # Release 1.8.0: October 25th, 2023
 - Increase minimum required CMake version to v3.5 to prevent deprecation warnings [#117](https://github.com/jlblancoc/suitesparse-metis-for-windows/issues/117).
 - Add option `METIS_IDXTYPEWIDTH` with default `64` to override the index type used for `metis.h` [#116](https://github.com/jlblancoc/suitesparse-metis-for-windows/issues/116).

CMakeLists.txt

@@ -267,10 +267,22 @@ if (WITH_OPENBLAS)
   # mabye with 'NOFORTAN=1' to get a pure C++ OpenBLAS library (with the
   # benefits described above)
   hunter_add_package(OpenBLAS)
-  find_package(OpenBLAS CONFIG REQUIRED)
-  message(STATUS "found OpenBLAS config file. Linking target OpenBLAS::OpenBLAS")
-  set(SuiteSparse_LINKER_LAPACK_BLAS_LIBS OpenBLAS::OpenBLAS)
   set(BLA_VENDOR OpenBLAS)
+  find_package(OpenBLAS CONFIG)
+  if (OpenBLAS_FOUND)
+    message(STATUS "Found OpenBLAS ${OpenBLAS_VERSION}")
+  else()
+    message(STATUS "Looking for OpenBLAS")
+    find_package(BLAS REQUIRED)
+    message(STATUS "Found OpenBLAS in ${BLAS_LIBRARIES}")
+  endif()
+  if (TARGET OpenBLAS::OpenBLAS)
+    message(STATUS "found OpenBLAS config file, linking target OpenBLAS::OpenBLAS")
+    set(SuiteSparse_LINKER_LAPACK_BLAS_LIBS OpenBLAS::OpenBLAS)
+  else()
+    message(STATUS "found OpenBLAS, linking target BLAS::BLAS")
+    set(SuiteSparse_LINKER_LAPACK_BLAS_LIBS BLAS::BLAS)
+  endif()
 elseif (WITH_MKL)
   hunter_add_package(mkl)
   set(BLA_VENDOR "Intel10_64lp")