[cmake-developers] Weird dependency on object files generated elsewhere

[James Bigler]

This is also causing my CUDA separable compilation feature to break as well.

I'm adding object files to the source list of a target, and this works in certain situations, but not all.

James

From: "jamesbigler at gmail.com<mailto:jamesbigler at gmail.com>" <jamesbigler at gmail.com<mailto:jamesbigler at gmail.com>>
Date: Thursday, May 8, 2014 12:34 PM
To: "cmake-developers at cmake.org<mailto:cmake-developers at cmake.org>" <cmake-developers at cmake.org<mailto:cmake-developers at cmake.org>>
Subject: [cmake-developers] Weird dependency on object files generated elsewhere

I was planning on fixing a bug related to flags and separable compilation for FindCUDA when I discovered something peculiar.  I'm asking here in case I missed something with how source files are processed.

I branched off of origin/master this morning.

I have a macro that generates some custom commands for building object files for cuda (found in FindCUDA.cmake).

CUDA_COMPILE(CUDA_FILES test_bin.cu<http://test_bin.cu>)
message("CUDA_FILES = ${CUDA_FILES}")

ADD_EXECUTABLE(cuda_compile_example
  ${CUDA_FILES}
  ${source_files}
  main.cc
  external_dependency.h
  )

When print out CUDA_FILES I get a full path:

CUDA_FILES = /Users/jbigler/code/FindCUDA/build-cmake-git/src/CMakeFiles/cuda_compile.dir//./cuda_compile_generated_test_bin.cu.o

Great!

When I try to compile cuda_compile_example I get this, though:

make[2]: *** No rule to make target `src/CMakeFiles/cuda_compile.dir/cuda_compile_generated_test_bin.cu.o', needed by `src/cuda_compile_example'.  Stop.

What I don't see in my makefiles is the build rule for the object file.

I can provide a reproducer, but it would require having CUDA installed.

This is for OSX 10.8 with Xcode 5.1 (command line utils, so Makefile).

James

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