[CMake] Visual Studio Warning Level

[Bill Hoffman]

Michael Jackson wrote:
> 
> On Nov 22, 2008, at 1:13 PM, Robert Dailey wrote:
> 
>> So it seems that this issue has come up before and it is an obvious 
>> feature to implement. In the meantime, can someone offer me the code 
>> for a macro I can use to easily and portably set warning levels?
>>
>> Thanks
> 
> 
> pseudo code
> 
> macro(set_warning_level level)
> 
> if (MSVC)
> # Set msvc type warnings
> SET (CXX_FLAGS ${CXX_FLAGS} [your warnings here])
> 
> elseif(GCC)
> # set gcc type warnings
> SET (CXX_FLAGS ${CXX_FLAGS} [your warnings here])
> 
> else()
> # we don't know this compiler
> message(STATUS "Warning levels have not been defined for this compiler")
> 
> endif()
> 
> endmacro(set_warning_level level)
> 

When this is done in CMake, that information will go into the 
Modules/Platform files.   So, it might be best to come up with something 
that uses the same idea as that.

   INCLUDE(MyPlatform/${CMAKE_SYSTEM_NAME}-${CMAKE_CXX_COMPILER_ID}-CXX 
OPTIONAL )

Put MyPlatform into the CMAKE_MODULE_PATH, then create platform files in 
MyPlatform/Linux-Intel-C.cmake

set(${CMAKE_CXX_COMPILER_ID}-CXX-WARNING1 -W1)

Then have the macro just add the specified warning variable.  If someone 
works out all the names, we can then move this stuff into CMake CVS.

-Bill