wrong flags for Linux Clang

[e-kwsm]

amd-fftw/CMakeLists.txt

Lines 75 to 80 in 6e7ca38

	if (CMAKE_C_COMPILER_ID MATCHES MSVC OR CMAKE_C_COMPILER_ID MATCHES Clang)
	if(CMAKE_BUILD_TYPE STREQUAL "Release")
	set(CMAKE_CXX_FLAGS_RELEASE "/O2 /DNDEBUG" CACHE STRING "" FORCE)
	set(CMAKE_C_FLAGS_RELEASE "/O2 /DNDEBUG" CACHE STRING "" FORCE)
	endif()
	endif()

amd-fftw/CMakeLists.txt

Lines 136 to 139 in 6e7ca38

	if (CMAKE_C_COMPILER_ID MATCHES MSVC OR CMAKE_C_COMPILER_ID MATCHES Clang)
	set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /MP")
	set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /W0 ")
	endif ()

[BiplabRaut]

Hi,
Can you share details on the issue?
Is it about the compiler optimization flag that you are suggesting to be O3?

[e-kwsm]

Hello, MSVC uses slash / for options, which is incompatible with compilers other than windows, where dash - starts an option.
Clang on Linux uses -O2 but not /O2.