Monday, January 15, 2018

Build HTK on macOS with Minimum Effort

In the last post, I presented instructions to build HTK on Ubuntu. In this post, I will show you how to compile HTK on macOS.

As before, download HTK latest stable version source code, 3.4.1 at the time of writing, from here. Extract the files as usual.
$ tar xfz HTK-3.4.1.tar.gz
$ cd htk

Next, you need some required software tools from Apple.
$ xcode-select --install

Now, let's configure and make
$ ./configure --prefix=$(pwd)
$ make

You will probably encounter an error complaining
(cd HTKLib && /Applications/ HTKLib.a) \

 || case "" in *k*) fail=yes;; *) exit 1;; esac;

gcc  -ansi -g -O2 -DNO_AUDIO -D'ARCH="darwin"' -I/usr/include/malloc -Wall -Wno-switch -g -O2 -I. -DPHNALG   -c -o HGraf.o HGraf.c
HGraf.c:73:10: fatal error: 'X11/Xlib.h' file not found

There are two options here. The first is to simply skip HSLab package that requires X11, thereby building without X11.
$ ./configure --prefix=$(pwd) --disable-hslab
$ make
$ make install

You will see all binary files in the bin folder.

The other option is to install X11 library. Download XQuartz from here and install it. This will create /opt/X11/ folder with necessary library and header files. We can now manually compile HTKLib package by specifying the header files
$ cd HTKLib
$ gcc  -ansi -g -O2 -DNO_AUDIO -D'ARCH="darwin"' -I/usr/include/malloc -Wall -Wno-switch -g -O2 -I. -DPHNALG   -c -o HGraf.o HGraf.c -I /opt/X11/include
$ cd ..

We also need to set library path:
$ export LIBRARY_PATH=/opt/X11/lib

Now, we are ready to resume the make process
$ make
$ make install

Viola! You should see bin directory with all HTK binary files!

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