User Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:23.0) Gecko/20100101 Firefox/23.0 (Beta/Release) Build ID: 20130901174911 Steps to reproduce: win8.1 vs2013preview MozillaBuild1.8 building the trunk. tons of message like the ones below appear. It seems that it's every source file. Does anyone know what the reason is? Did I do something wrong. No rule to make target 'd:/develop/mozilla/central/obj-12/ipc/ipdl/PPluginBackgr oundDestroyer.cpp:' needed by ['<command-line>', 'd:/develop/mozilla/central/obj -12/ipc/ipdl/PPluginBackgroundDestroyer.cpp:'] No rule to make target 'd:/develop/mozilla/central/obj-12/ipc/ipdl/PPluginBackgr oundDestroyerChild.cpp:' needed by ['<command-line>', 'd:/develop/mozilla/centra l/obj-12/ipc/ipdl/PPluginBackgroundDestroyerChild.cpp:'] No rule to make target 'd:/develop/mozilla/central/obj-12/ipc/ipdl/PPluginBackgr oundDestroyerParent.cpp:' needed by ['<command-line>', 'd:/develop/mozilla/centr al/obj-12/ipc/ipdl/PPluginBackgroundDestroyerParent.cpp:'] No rule to make target 'd:/develop/mozilla/central/obj-12/ipc/ipdl/PPluginIdenti fier.cpp:' needed by ['<command-line>', 'd:/develop/mozilla/central/obj-12/ipc/i pdl/PPluginIdentifier.cpp:'] No rule to make target 'd:/develop/mozilla/central/obj-12/ipc/ipdl/PPluginIdenti fierChild.cpp:' needed by ['<command-line>', 'd:/develop/mozilla/central/obj-12/ ipc/ipdl/PPluginIdentifierChild.cpp:'] No rule to make target 'd:/develop/mozilla/central/obj-12/ipc/ipdl/PPluginIdenti fierParent.cpp:' needed by ['<command-line>', 'd:/develop/mozilla/central/obj-12 /ipc/ipdl/PPluginIdentifierParent.cpp:'] No rule to make target 'd:/develop/mozilla/central/obj-12/ipc/ipdl/PPluginInstan ce.cpp:' needed by ['<command-line>', 'd:/develop/mozilla/central/obj-12/ipc/ipd l/PPluginInstance.cpp:'] No rule to make target 'd:/develop/mozilla/central/obj-12/ipc/ipdl/PPluginInstan ceChild.cpp:' needed by ['<command-line>', 'd:/develop/mozilla/central/obj-12/ip c/ipdl/PPluginInstanceChild.cpp:'] No rule to make target 'd:/develop/mozilla/central/obj-12/ipc/ipdl/PPluginInstan ceParent.cpp:' needed by ['<command-line>', 'd:/develop/mozilla/central/obj-12/i pc/ipdl/PPluginInstanceParent.cpp:'] No rule to make target 'd:/develop/mozilla/central/obj-12/ipc/ipdl/PPluginModule .cpp:' needed by ['<command-line>', 'd:/develop/mozilla/central/obj-12/ipc/ipdl/ PPluginModule.cpp:'] No rule to make target 'd:/develop/mozilla/central/obj-12/ipc/ipdl/PPluginModule Child.cpp:' needed by ['<command-line>', 'd:/develop/mozilla/central/obj-12/ipc/ ipdl/PPluginModuleChild.cpp:'] No rule to make target 'd:/develop/mozilla/central/obj-12/ipc/ipdl/PPluginModule Parent.cpp:' needed by ['<command-line>', 'd:/develop/mozilla/central/obj-12/ipc /ipdl/PPluginModuleParent.cpp:'] No rule to make target 'd:/develop/mozilla/central/obj-12/ipc/ipdl/PPluginScript ableObject.cpp:' needed by ['<command-line>', 'd:/develop/mozilla/central/obj-12 /ipc/ipdl/PPluginScriptableObject.cpp:'] No rule to make target 'd:/develop/mozilla/central/obj-12/ipc/ipdl/PPluginScript ableObjectChild.cpp:' needed by ['<command-line>', 'd:/develop/mozilla/central/o bj-12/ipc/ipdl/PPluginScriptableObjectChild.cpp:'] No rule to make target 'd:/develop/mozilla/central/obj-12/ipc/ipdl/PPluginScript ableObjectParent.cpp:' needed by ['<command-line>', 'd:/develop/mozilla/central/ obj-12/ipc/ipdl/PPluginScriptableObjectParent.cpp:'] No rule to make target 'd:/develop/mozilla/central/obj-12/ipc/ipdl/PPluginStream .cpp:' needed by ['<command-line>', 'd:/develop/mozilla/central/obj-12/ipc/ipdl/ PPluginStream.cpp:']

the build can continue, though it is very slow and may run into memoryerror.

it only show up in rebuild. the files will be rebuilt though nothing change.

It's caused by --disable-debug-symbols(more accurate, the -Zi). But how is it related?

Is this fixed by the patch in bug 914935?

yes.