Hi there,
when a project is saved on a non HFS partition on OSX Unreal Build Tool often fails to generate project files and/or build the project. This is due to the fact that OSX saves resource attributes on non HFS partitions in files on the disk instead of a section in the partition table. This makes the engine unable to compile code or generate project files, resulting in errors like the following:
ERROR: Source file "/Volumes/Development/Game Development/Unreal/MyProject/Plugins/MyPlugin/Source/MyPlugin/Public/._MyFile.cpp" is not including any headers.
We expect all modules to include a header file for precompiled header generation. Please add an #include statement.
A temporary solution for this is to run
dot_clean .
prior to generating project files and building with Xcode. This needs to be done everytime OSX touches the file and generates an attribute store on disk.
More information on this incredibly annoying OSX specific behavior can be found here: http://apple.stackexchange.com/questions/14980/why-are-dot-underscore-files-created-and-how-can-i-avoid-them
A simple solution would be to exclude files matching “._.” from the unreal build tool.