Find{BLAS,LAPACK}: Add support for FLAME blis and libflame

FLAME (github.com/flame) provides a variety of numerical libraries.
`blis` and `libflame` can be setup to expose BLAS/LAPACK interfaces.

Fixes: #17470

Help/release/dev/blas-lapack-flame.rst

@@ -0,0 +1,5 @@
+blas-lapack-flame
+-----------------
+
+* The :module:`FindBLAS` and :module:`FindLAPACK` modules learned to support
+  `FLAME <https://github.com/flame>`__ ``blis`` and ``libflame``.

Modules/FindBLAS.cmake

@@ -36,6 +36,7 @@
 #
 # * Goto
 # * OpenBLAS
+# * FLAME
 # * ATLAS PhiPACK
 # * CXML
 # * DXML
@@ -190,6 +191,20 @@ if (BLA_VENDOR STREQUAL "OpenBLAS" OR BLA_VENDOR STREQUAL "All")
  endif()
 endif ()
 
+if (BLA_VENDOR STREQUAL "FLAME" OR BLA_VENDOR STREQUAL "All")
+ if(NOT BLAS_LIBRARIES)
+  # FLAME's blis library (https://github.com/flame/blis)
+  check_fortran_libraries(
+  BLAS_LIBRARIES
+  BLAS
+  sgemm
+  ""
+  "blis"
+  ""
+  )
+ endif()
+endif ()
+
 if (BLA_VENDOR STREQUAL "ATLAS" OR BLA_VENDOR STREQUAL "All")
  if(NOT BLAS_LIBRARIES)
   # BLAS in ATLAS library? (http://math-atlas.sourceforge.net/)

Modules/FindLAPACK.cmake

@@ -37,6 +37,7 @@
 #
 # * Intel(mkl)
 # * OpenBLAS
+# * FLAME
 # * ACML
 # * Apple
 # * NAS
@@ -201,6 +202,20 @@ if (BLA_VENDOR STREQUAL "OpenBLAS" OR BLA_VENDOR STREQUAL "All")
  endif()
 endif ()
 
+if (BLA_VENDOR STREQUAL "FLAME" OR BLA_VENDOR STREQUAL "All")
+ if(NOT LAPACK_LIBRARIES)
+  check_lapack_libraries(
+  LAPACK_LIBRARIES
+  LAPACK
+  cheev
+  ""
+  "flame"
+  "${BLAS_LIBRARIES}"
+  ""
+  )
+ endif()
+endif ()
+
 #acml lapack
  if (BLA_VENDOR MATCHES "ACML" OR BLA_VENDOR STREQUAL "All")
    if (BLAS_LIBRARIES MATCHES ".+acml.+")