Assume no underline suffixes on symbols when compiling with ifx on Windows

Author: martin-frbg

cmake/system.cmake

@@ -672,6 +672,9 @@ endif ()
 if (${CMAKE_C_COMPILER} STREQUAL "LSB" OR ${CMAKE_SYSTEM_NAME} STREQUAL "Windows")
   set(LAPACK_CFLAGS "${LAPACK_CFLAGS} -DLAPACK_COMPLEX_STRUCTURE")
 endif ()
+if (${CMAKE_C_COMPILER_ID} MATCHES "IntelLLVM" AND ${CMAKE_SYSTEM_NAME} STREQUAL "Windows")
+	set(LAPACK_CFLAGS "${LAPACK_CFLAGS} -DNOCHANGE")
+endif ()
 
 if ("${CMAKE_BUILD_TYPE}" STREQUAL "Release")
 if ("${F_COMPILER}" STREQUAL "FLANG")