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I have already installed Open Fst in Ubuntu and its working fine. Now i'm trying to install Open GRM thrax. I have tried installing with 2 different versions of thrax.

Thrax version 1.1.0:

thraxOpenGrm/thrax-1.1.0$ ./configure
below is the error that i get.
checking how to hardcode library paths into programs... immediate
checking for bison... no
checking for byacc... no
checking for std::tr1::hash<long long unsigned>... yes
checking for __gnu_cxx::slist<int>... yes
checking fst/fst.h usability... yes
checking fst/fst.h presence... no
configure: WARNING: fst/fst.h: accepted by the compiler, rejected by the preprocessor!
configure: WARNING: fst/fst.h: proceeding with the compiler's result
checking for fst/fst.h... yes
checking fst/extensions/far/far.h usability... yes
checking fst/extensions/far/far.h presence... no
configure: WARNING: fst/extensions/far/far.h: accepted by the compiler, rejected by the preprocessor!
configure: WARNING: fst/extensions/far/far.h: proceeding with the compiler's result
checking for fst/extensions/far/far.h... yes
checking fst/extensions/pdt/pdt.h usability... no
checking fst/extensions/pdt/pdt.h presence... no
checking for fst/extensions/pdt/pdt.h... no
configure: error: fst/extensions/pdt/pdt.h header not found
Thrax version 0.1.0:
thraxOpenGrm/thrax-0.1.0$ ./configure
below is the error that i get.
checking how to hardcode library paths into programs... immediate
checking for bison... no
checking for byacc... no
checking for std::tr1::hash<long long unsigned>... yes
checking for __gnu_cxx::slist<int>... yes
checking fst/fst.h usability... no
checking fst/fst.h presence... no
checking for fst/fst.h... no
configure: error: fst/fst.h header not found
It throws different errors with different thrax versions. I read a solution in this forum.
http://www.openfst.org/twiki/bin/view/Forum/GrmThraxForum
It says openfst must be 'built' with ./configure --enable-far=true . i uninstalled openfst and installed it using ./configure --enable-far=true and also with ./configure --enable-far. The error still persists. 
During installation of openfst you have to type:
./configure --enable-far=true --enable-pdt=true --enable-mpdt=true
Then you should install thrax and while on it, type in terminal:
export LD_LIBRARY_PATH=/usr/local/lib
Worked for me for openfst-1.5.4 and thrax-1.2.2.
When I got:
checking fst/extensions/pdt/pdt.h usability... no
I added: 
--enable-pdt=true
to ./configure for openfst and I did the same for mpdt error. If you get other errors, you can try doing the same.
I would try to remove openfst against and then do a find on the system to make sure all the fst/fst.h files are gone.  It might be missing something or some other package might have provided one.    
Also, the --enable-far should not have =true on the end.   So, maybe try it that way.
                I assume you don't just do a configure, but a 'make' and then 'make install' when installing openfst.
– LawfulEvil
                Mar 26, 2015 at 19:17
        
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