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Generator expressions, including configuration-specific expressions may be used as link libraries of targets. The old-style keywords of target_link_libraries are handled in terms of new generator expressions. However, the generator expressions expect target names to be valid against a regular expression, whereas target_link_libraries does not require validation. In generator expression constructed without any action from the user we need to ensure that only valid expressions are generated. Ensure that strings which are not valid target names are not used in generator expressions which validate the argument. Code like target_link_libraries(B debug A) generates usage requirement references such as "$<$<CONFIG:DEBUG>:A>". When cmTarget::GetIncludeDirectories uses such references it generates expressions like: $<TARGET_PROPERTY:$<$<CONFIG:DEBUG>:A>,INTERFACE_INCLUDE_DIRECTORIES> When the conditions are false such references evaluate as an empty string and the expression fails with an error such as: $<TARGET_PROPERTY:tgt,prop> expression requires a non-empty target name. Fix this by teaching cmTarget::GetIncludeDirectories to wrap the above expression inside a conditional: $<$<BOOL:$<$<CONFIG:DEBUG>:A>>:...> so that $<TARGET_PROPERTY:...> will not be evaluated with an empty target.
This is CMake, the cross-platform, open-source make system. CMake is distributed under the BSD License, see Copyright.txt. For documentation see the Docs/ directory once you have built CMake or visit http://www.cmake.org. Building CMake ============== Supported Platforms ------------------- MS Windows, Mac OS X, Linux, FreeBSD, Solaris, HP-UX, IRIX, BeOS, QNX Other UNIX-like operating systems may work too out of the box, if not it shouldn't be a major problem to port CMake to this platform. Contact the CMake mailing list in this case: http://www.cmake.org/mailman/listinfo/cmake If you don't have any previous version of CMake already installed -------------------------------------------------------------- * UNIX/Mac OSX/MinGW/MSYS/Cygwin: You need to have a compiler and a make installed. Run the bootstrap script you find the in the source directory of CMake. You can use the --help option to see the supported options. You may want to use the --prefix=<install_prefix> option to specify a custom installation directory for CMake. You can run the bootstrap script from within the CMake source directory or any other build directory of your choice. Once this has finished successfully, run make and make install. So basically it's the same as you may be used to from autotools-based projects: $ ./bootstrap; make; make install * Other Windows: You need to download and install a binary release of CMake in order to build CMake. You can get these releases from http://www.cmake.org/HTML/Download.html . Then proceed with the instructions below. You already have a version of CMake installed --------------------------------------------- You can build CMake as any other project with a CMake-based build system: run the installed CMake on the sources of this CMake with your preferred options and generators. Then build it and install it. For instructions how to do this, see http://www.cmake.org/HTML/RunningCMake.html