[Minor] Sigh, another workaround for broken blas

1 files changed, 33 insertions, 0 deletions

diff --git a/cmake/Openblas.cmake b/cmake/Openblas.cmake
index 69f065d8f..2155b2955 100644
--- a/cmake/Openblas.cmake
+++ b/cmake/Openblas.cmake
@@ -27,5 +27,38 @@ IF(WITH_BLAS)
     ELSE()
         ADD_COMPILE_OPTIONS(-DHAVE_CBLAS_H)
     ENDIF()
+    file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/sgemm.c" "
+#include <stddef.h>
+enum CBLAS_ORDER {CblasRowMajor=101, CblasColMajor=102 };
+enum CBLAS_TRANSPOSE {CblasNoTrans=111, CblasTrans=112 };
+extern void cblas_sgemm(const enum CBLAS_ORDER Order,
+                const enum CBLAS_TRANSPOSE TA,
+                const enum CBLAS_TRANSPOSE TB,
+                const int M, const int N, const int K,
+                const float  alpha, const float *A, const int lda,
+                const float *B, const int ldb, const float  beta,
+                float *C, const int ldc);
+int main(int argc, char **argv)
+{
+    cblas_sgemm(CblasRowMajor, CblasNoTrans, CblasNoTrans, 0, 0, 0, 0, NULL, 0,
+        NULL, 0, 0, NULL, 0);
+    return 0;
+}
+")
+    try_compile(HAVE_CBLAS_SGEMM
+            ${CMAKE_CURRENT_BINARY_DIR}
+            "${CMAKE_CURRENT_BINARY_DIR}/sgemm.c"
+            COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS}
+            LINK_LIBRARIES ${BLAS_REQUIRED_LIBRARIES}
+            OUTPUT_VARIABLE SGEMM_ERR)
+
+    # Cmake is just brain damaged
+    #CHECK_LIBRARY_EXISTS(${BLAS_REQUIRED_LIBRARIES} cblas_sgemm "" HAVE_CBLAS_SGEMM)
+    if(HAVE_CBLAS_SGEMM)
+        MESSAGE(STATUS "Blas has CBLAS sgemm")
+        ADD_COMPILE_OPTIONS(-DHAVE_CBLAS_SGEMM)
+    else()
+        MESSAGE(STATUS "Blas has -NOT- CBLAS sgemm, use internal workaround: ${SGEMM_ERR}")
+    endif()
     ADD_COMPILE_OPTIONS(-DHAVE_CBLAS)
 ENDIF(WITH_BLAS)
\ No newline at end of file