Pyfst install error

Question

I'm having trouble installing Pyfst, which is a Python wrapper for OpenFst. I've tried using

pip install pyfst

but always end up with an error about some "unordered_map" which can't be found. Here's part of the stack trace:

In file included from fst/_fst.cpp:321:

/usr/local/include/fst/symbol-table.h:26:10: fatal error: 'unordered_map' file not found

#include <unordered_map>

I have had the same error. There's an open issue here: github.com/vchahun/pyfst/issues/24 — Delip
– Delip, Commented Sep 15, 2015 at 16:19

Lee Morris · Accepted Answer · 2015-12-29 18:45:19Z

4

Figured out a solution...

Environment: Ubuntu Server 14.04

Build and install OpenFST:

mkdir openfst
cd openfst
wget http://www.openfst.org/twiki/pub/FST/FstDownload/openfst-1.5.0.tar.gz
tar zxf openfst-1.5.0.tar.gz
cd openfst-1.5.0
./configure
make
sudo make install

The Magic:

sudo CFLAGS="-std=c++0x" pip install pyfst

Hope this helps.

answered Dec 29, 2015 at 18:45

Lee Morris

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3 Comments

istewart Over a year ago

Thanks for the suggestion! I'm running Mac OSX, and I got as far as ./configure before I hit the following error:

checking whether we are cross compiling... configure: error: in '/Downloads/openfst/openfst-1.5.0': configure: error: cannot run C compiled programs.

istewart Over a year ago

Edit: fixed the above error by installing the latest Xcode tools and now running ./configure without any errors so far.

istewart Over a year ago

Last update: I was able to run the ./configure and make install commands as directed. However when I tried running pip install as directed I got a similar unordered map error:

/usr/local/include/fst/symbol-table.h:26:10: fatal error: 'unordered_map' file not found     #include <unordered_map>              ^     1 error generated.     error: command '/usr/bin/clang' failed with exit status 1

Leaf · Accepted Answer · 2017-03-08 02:44:30Z

1

i also came across the problem，but i solved it easily!

https://github.com/UFAL-DSG/pyfst

You should install OpenFst first,then to install fst!For more details,look at the link above.

answered Mar 8, 2017 at 2:44

Leaf

111 bronze badge

2 Comments

Arafangion Over a year ago

@leaf: Consider describing the answer here, in case that github page goes down.

istewart Over a year ago

Still doesn't work for me and I get a c++ error => c++: error: unrecognized command line option '-stdlib=libstdc++' command 'c++' failed with exit status 1 error: command 'c++' failed with exit status 1

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