Re: [sigc] How to test for libsigc++ with CMake?

[Rui Maciel <rui maciel gmail com>]

On 02/09/2012 02:52 PM, Jens Bäckman wrote:
>  It's actually very simple, if you use pkg-config.
>
>  find_package(PkgConfig REQUIRED) pkg_check_modules(SIGC2 REQUIRED
>  sigc++-2.0) include_directories(${SIGC2_INCLUDE_DIRS}) # Define how
>  to build yourapp here target_link_libraries(yourapp
>  ${SIGC2_LIBRARIES})

Thanks, Jens.  Your suggestion appears to work.  The only issue I've 
noticed is that it appears checking for a module's version doesn't work 
as expected.  In cmake's documentation[1] it is said that the <MODULE> 
parameter is tested through the following formats:

   {MODNAME}            ... matches any version
   {MODNAME}>={VERSION} ... at least version <VERSION> is required
   {MODNAME}={VERSION}  ... exactly version <VERSION> is required
   {MODNAME}<={VERSION} ... modules must not be newer than <VERSION>

Yet, it appears that cmake doesn't throw a warning or error message if I 
set {VERSION} with any silly value. It would be nice if it was possible 
to throw an error based on that information.


Thanks for the help,
Rui Maciel


[1] http://cmake.org/cmake/help/cmake-2-8-docs.html#module:FindPkgConfig