When building dasher from outside source tree, this error was found:

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g++ -DHAVE_CONFIG_H -I. -I/home/thep/vcs/gnome_svn/dasher/Src/DasherCore/LanguageModelling -I../../..     -g -O2 -MT CTWLanguageModel.o -MD -MP -MF .deps/CTWLanguageModel.Tpo -c -o CTWLanguageModel.o /home/thep/vcs/gnome_svn/dasher/Src/DasherCore/LanguageModelling/CTWLanguageModel.cpp
In file included from /home/thep/vcs/gnome_svn/dasher/Src/DasherCore/LanguageModelling/../SettingsStore.h:14,
                 from /home/thep/vcs/gnome_svn/dasher/Src/DasherCore/LanguageModelling/../DasherComponent.h:4,
                 from /home/thep/vcs/gnome_svn/dasher/Src/DasherCore/LanguageModelling/LanguageModel.h:15,
                 from /home/thep/vcs/gnome_svn/dasher/Src/DasherCore/LanguageModelling/CTWLanguageModel.h:30,
                 from /home/thep/vcs/gnome_svn/dasher/Src/DasherCore/LanguageModelling/CTWLanguageModel.cpp:26:
/home/thep/vcs/gnome_svn/dasher/Src/DasherCore/LanguageModelling/../Parameters.h:27:26: error: ../../config.h: No such file or directory
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The '#include "../../config.h"' preprocessor in Src/DasherCore/Parameters.h relies on the fact that config.h is located under the same subtree as the other source. Unfortunately, this is not true for non-source-dir builds, where the config.h generated from config.h.in is located outside the source tree.

In fact, GNU autotools already supply "-I$(top_builddir)" to CFLAGS ("-I../../.." in above example) for this purpose, so that the generated config.h can be included with just '#include "config.h"' in every source file. So, I think all instances of such #include statement should be replaced, to allow non-source-dir builds.