I added some my own cpps like in gmp/moz.build before GMPService.cpp like below UNIFIED_SOURCES += [ .... 'GMPMYOWN1.cpp' 'GMPMYOWN2.cpp' .... 'GMPService.cpp', 'GMPServiceChild.cpp', 'GMPServiceParent.cpp', I got lots of compile errors. The root cause is that, GMPService.cpp and GMPServiceParent/Child.cpp are separated into different unified build chunks. I found GMPServiceParent.cpp does not include GMPServiceParent.h Instead, dom/media/gmp/GMPService.cpp includes GMPServiceParent.h. Once GMPService.cpp and GMPServiceParent/Child.cpp are not in the same unified unit, compile error will occur since GMPServiceParent.h is included in GMPService.cpp not GMPService.h. Is this on purpose? If so, how can I solve the compile errors if I add some cpp before GMPService.cpp.

Hi Josh, Could you please give me some suggestions about how to prevent from those errors? Currently, I rename my cpp to GMPZxxx.cpp which is unified after GMPService.cpp to avoid the compile errors. Thanks.

I don't think there's anything intentional here. We should just fix the non-unified build.

I forcely cut all the included headers from GMPService.cpp and paste into GMPService.h. There are lots of compile errors. Currently, I have no idea how to solve the compile errors. So I just name my cpp with prefix "Z" to avoid those errors.

I don't really work on this any more, don't know what's going on here. Sorry. I think Chris has pretty much taken over.

Hi Chris, Do you have any idea about how to elegantly solve this problems? I have tried as comment3 mentioned and cannot solve those errors. Should anyone meet this problem before? Thanks.

This patch fixes the unified build in dom/media/gmp. James: The easiest way to fix unified build failures in a directory is to edit that directory's moz.build file and delete the "UNIFIED" in "UNIFIED_SOURCES", so that effectively you disable unified build. You then need to fix the compile errors one by one, by either adding #includes, or otherwise making sure things are declared/defined in the right translation units. This builds for me on Windows, I haven't tried elsewhere locally. https://treeherder.mozilla.org/#/jobs?repo=try&revision=194f16461c33

https://hg.mozilla.org/mozilla-central/file/ff2e07228041/python/mozbuild/mozbuild/test/frontend/data/unified-sources-non-unified/moz.build#l21 You can also try FILES_PER_UNIFIED_FILE=1 to disable unified build.

Comment on attachment 8611022 [details] [diff] [review] Patch: Fix unifed build in dom/media/gmp Review of attachment 8611022 [details] [diff] [review]: ----------------------------------------------------------------- seems there is a typo here. build fails on try server I will apply this patch later. Thanks for your feedback. ::: dom/media/gmp/GMPContentParent.cpp @@ +11,5 @@ > #include "GMPVideoDecoderParent.h" > #include "GMPVideoEncoderParent.h" > #include "mozIGeckoMediaPluginService.h" > #include "mozilla/Logging.h" > +#include "mozilla/Unused.h" unused.h typo

Hi Chris, The patch works fine on me. Thanks~