[CMake] Xcode duplicate filename issue?

[Gregor Jasny]

Hello,

On 6/26/17 8:12 PM, Watson, Andre wrote:
> We're currently migrating a huge internal system over to CMake, and we're nearing completion, but have run into an issue with the generated Xcode projects.  We build this system on Windows, Linux, and Mac (both makefile and Xcode).  On all systems, we have a third party directory that has a couple of duplicate source names within a single CMakeLists.txt file.  On Windows, Linux, and makefile Mac, our projects all generate, build, and link successfully.  However, on Xcode Mac, our project builds, but fails to link.  On further inspection, the duplicate filenames are being generated into the intermediate build directories as filenames such as attributes-78663048C12E97C.o and attributes-FA2B54357D684A6E.o.  The linker, however, is looking for attributes.o.  It appears that the compiling process is recognizing the duplicate naming and adding on the hex string (the non duplicate .o's do not have these strings), but that these new filenames are not being passed to the linker.  Is this is an Xcode option that I am missing, or this something occurring within the CMake project generation that is causing is mismatch?

could you please try to create a minimal example and file a bug report?
I'll have a look then.

Thanks,
Gregor