[CMake] Marking libraries (yes: maRking)

[Brad King]

Brandon J. Van Every wrote:
> Rodrigo Madera wrote:
> 
>> I have a project that build a lot of different libraries (like Boost
>> does, but it's not Boost) with configuration markings and build
>> options.
>>
>> I want to build:
>>
>> MyLib.lib:   the release library
>> MyLib-D.lib    debug library
>> MyLib-A.lib     non unicode version
>> MyLib-AD.lib   nin unicode debug library.
>>
>> How can I do this _efficiently_?
>>   
> 
> The CVS version of CMake lets you do things like building SHARED vs. 
> STATIC libraries and also provide target-specific flags.  You're still 
> going to have to create entries for each and every library you want to 
> build though.  There's no "take care of all of my minor variation 
> decisions" for me.  You have to make those decisions yourself.

The CMake development version from CVS has several features that make 
this easier.  Using it you should be able to do:

--------------------------------------------------------------------
# Macro to create both an ASCII and UNICODE version of a library.
MACRO(MY_ADD_LIBRARY name)
   # Build UNICODE version.
   ADD_LIBRARY(${name} ${ARGN})
   SET_TARGET_PROPERTIES(${name} PROPERTIES DEBUG_POSTFIX -D)
   SET_TARGET_PROPERTIES(${name} PROPERTIES COMPILE_FLAGS "-D_UNICODE")

   # Build ASCII version.
   ADD_LIBRARY(${name}-A ${ARGN})
   SET_TARGET_PROPERTIES(${name}-A PROPERTIES DEBUG_POSTFIX D)
ENDMACRO(MY_ADD_LIBRARY)

# Add library MyLib.
MY_ADD_LIBRARY(MyLib src1.c src2.c)
--------------------------------------------------------------------

When the user selects the "Debug" configuration this will build 
"MyLib-D" and "MyLib-AD".  When the user selects the "Release" 
configuration this will build "MyLib" and "MyLib-A".

See the documentation of the SET_TARGET_PROPERTY command for details.

-Brad