Enabling xtensor-blas with xeus-cpp-lite

Author: anutosh491

CMakeLists.txt

@@ -21,6 +21,10 @@ set(XTENSOR_BLAS_INCLUDE_DIR ${INCLUDE_DIR})
 set(XTENSOR_BLAS_CLING_LIBRARY_DIR_64 "\"${CMAKE_INSTALL_PREFIX}/lib64\"")
 set(XTENSOR_BLAS_CLING_LIBRARY_DIR_32 "\"${CMAKE_INSTALL_PREFIX}/lib32\"")
 set(XTENSOR_BLAS_CLING_LIBRARY_DIR "\"${CMAKE_INSTALL_PREFIX}/lib\"")
+if(EMSCRIPTEN)
+    set(OPENBLAS_CPPINTEROP_LIBRARY_PATH "\"/lib/${CMAKE_SHARED_LIBRARY_PREFIX}openblas${CMAKE_SHARED_LIBRARY_SUFFIX}\"")
+    message(STATUS "OPENBLAS_CPPINTEROP_LIBRARY_PATH = ${OPENBLAS_CPPINTEROP_LIBRARY_PATH}")
+endif()
 
 configure_file (
     "${INCLUDE_DIR}/xtensor-blas/xblas_config_cling.hpp.in"
@@ -86,7 +90,7 @@ OPTION(XTENSOR_USE_FLENS_BLAS "use FLENS generic implementation instead of cblas
 # If that is not the case, one can pass OpenBLAS_DIR without the boolean
 # toggle.
 OPTION(USE_OPENBLAS "use OpenBLAS (requires suitable OpenBLASConfig.cmake)" OFF)
-if(OpenBLAS_DIR)
+if(OpenBLAS_DIR OR EMSCRIPTEN)
   set(USE_OPENBLAS ON)
 endif()
 

include/xtensor-blas/xblas_config.hpp

@@ -30,6 +30,10 @@
 #include "xtensor-blas/xblas_config_cling.hpp"
 #endif
 
+#if defined(__CLANG_REPL__) && defined(__EMSCRIPTEN__)
+#include "xtensor-blas/xblas_config_cling.hpp"
+#endif
+
 namespace xt
 {
     using blas_index_t = BLAS_IDX;

include/xtensor-blas/xblas_config_cling.hpp.in

@@ -10,17 +10,28 @@
 #ifndef XBLAS_CONFIG_CLING_HPP
 #define XBLAS_CONFIG_CLING_HPP
 
-#pragma cling add_library_path(@XTENSOR_BLAS_CLING_LIBRARY_DIR_64@)
-#pragma cling add_library_path(@XTENSOR_BLAS_CLING_LIBRARY_DIR_32@)
-#pragma cling add_library_path(@XTENSOR_BLAS_CLING_LIBRARY_DIR@)
-
 #ifndef XTENSOR_USE_FLENS_BLAS
 
 #define HAVE_CBLAS 1
 
+#if defined(__CLING__)
+
+#pragma cling add_library_path(@XTENSOR_BLAS_CLING_LIBRARY_DIR_64@)
+#pragma cling add_library_path(@XTENSOR_BLAS_CLING_LIBRARY_DIR_32@)
+#pragma cling add_library_path(@XTENSOR_BLAS_CLING_LIBRARY_DIR@)
 #pragma cling load("libblas")
 #pragma cling load("liblapack")
 
-#endif
+#elif defined(__EMSCRIPTEN__) && defined(__CLANG_REPL__)
+
+#include <clang/Interpreter/CppInterOp.h>
+static bool _openblas_loaded = []() {
+    Cpp::LoadLibrary(@OPENBLAS_CPPINTEROP_LIBRARY_PATH@, false);
+    return true;
+}();
 
 #endif
+
+#endif // XTENSOR_USE_FLENS_BLAS
+
+#endif // XBLAS_CONFIG_CLING_HPP