Add Windows Openblas+lapack (#875)

* Use openblas+lapack in win
* Use openblas shared lib

CMakeLists.txt

@@ -181,6 +181,11 @@ else()
 	if(WIN32)
 		message(STATUS "Uncompressing OpenBLAS static library...")
 		execute_process(COMMAND ${CMAKE_COMMAND} -E tar "xvfj" "${AER_SIMULATOR_CPP_SRC_DIR}/third-party/win64/lib/openblas.7z" WORKING_DIRECTORY  "${AER_SIMULATOR_CPP_SRC_DIR}/third-party/win64/lib/")
+		set(OPENBLAS_DLLs
+			"${AER_SIMULATOR_CPP_SRC_DIR}/third-party/win64/lib/openblas.dll"
+			"${AER_SIMULATOR_CPP_SRC_DIR}/third-party/win64/lib/flang.dll"
+			"${AER_SIMULATOR_CPP_SRC_DIR}/third-party/win64/lib/flangrti.dll"
+			"${AER_SIMULATOR_CPP_SRC_DIR}/third-party/win64/lib/libomp.dll")
 	endif()
 	find_package(BLAS QUIET)
 	if(NOT BLAS_FOUND)
@@ -319,6 +324,13 @@ else() # Standalone build
 		PRIVATE ${AER_SIMULATOR_CPP_EXTERNAL_LIBS})
 	target_compile_definitions(qasm_simulator
 		PRIVATE ${AER_COMPILER_DEFINITIONS})
+	if(WIN32 AND NOT BLAS_LIB_PATH)
+		add_custom_command(TARGET qasm_simulator POST_BUILD COMMAND ${CMAKE_COMMAND} -E copy_if_different
+				${OPENBLAS_DLLs}
+				$<TARGET_FILE_DIR:qasm_simulator>)
+		install(FILES ${OPENBLAS_DLLs} DESTINATION bin)
+	endif()
+
 	install(TARGETS qasm_simulator DESTINATION bin)
 
 	# Linter

qiskit/providers/aer/backends/wrappers/CMakeLists.txt

@@ -35,4 +35,6 @@ install(TARGETS controller_wrappers LIBRARY DESTINATION qiskit/providers/aer/bac
 # Install redistributable dependencies
 if(APPLE)
     install(FILES "${CONAN_LIB_DIRS_LLVM-OPENMP}/libomp.dylib" DESTINATION qiskit/providers/aer/backends)
+elseif(WIN32 AND NOT BLAS_LIB_PATH)
+    install(FILES ${OPENBLAS_DLLs} DESTINATION qiskit/providers/aer/backends)
 endif()