leezu commented on code in PR #21093:
URL: https://github.com/apache/incubator-mxnet/pull/21093#discussion_r930531912


##########
cmake/ChooseBlas.cmake:
##########
@@ -33,7 +34,14 @@ if(USE_BLAS MATCHES "MKL" OR USE_BLAS MATCHES "mkl" OR NOT 
DEFINED USE_BLAS)
   endif()
 endif()
 
-if(BLAS STREQUAL "Atlas" OR BLAS STREQUAL "atlas")
+if(BLAS STREQUAL "FlexiBLAS" OR BLAS STREQUAL "flexiblas")
+  find_package(BLAS REQUIRED)

Review Comment:
   For the other BLAS besides MKL this ChooseBlas.cmake does not rely on the 
[upstream 
find_package(BLAS)](https://cmake.org/cmake/help/latest/module/FindBLAS.html). 
My only concern is that with your PR, users can specify BLAS=FlexiBLAS, but 
your find_package(BLAS) will find any BLAS that may or may not be FlexiBLAS. 
That's why it will be helpful for you to force BLA_VENDOR=FlexiBLAS inside this 
if clause.
   
   So, specifically I'm suggesting adding a `set(BLA_VENDOR FlexiBLAS)` before 
the current line but still inside the if clause.



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