Noel, Ever since: https://cgit.freedesktop.org/libreoffice/core/commit/?id=9cceba9a make DBG_TESTSOLARMUTEX available in assert builds Windows builds with "--enable-debug" are failing with the following error: D:/core/vcl/source/app/svmain.cxx(371): error C3861: 'DbgGUIInitSolarMutexCheck': identifier not found make[1]: *** [D:/core/solenv/gbuild/LinkTarget.mk:293: D:/core/workdir/CxxObject/vcl/source/app/svmain.o] Error 2 make[1]: *** Waiting for unfinished jobs.... make: *** [Makefile:286: build] Error 2 Should your change be limited to Linux or something else going on here? -Luke