I cannot compile r33482 because it complains that GuiFloat.cpp and GuiFloat.h are missing. Removing these entries from the relevant Makefile.am seems to allow LyX to compile.
-- John C. McCabe-Dansted
Index: src/frontends/qt4/Makefile.am =================================================================== --- src/frontends/qt4/Makefile.am (revision 33482) +++ src/frontends/qt4/Makefile.am (working copy) @@ -81,7 +81,6 @@ GuiErrorList.cpp \ GuiERT.cpp \ GuiExternal.cpp \ - GuiFloat.cpp \ GuiFontExample.cpp \ GuiFontLoader.cpp \ GuiFontMetrics.cpp \ @@ -192,7 +191,6 @@ GuiErrorList.h \ GuiERT.h \ GuiExternal.h \ - GuiFloat.h \ GuiGraphics.h \ GuiHSpace.h \ GuiHyperlink.h \