How to compile HTK

[Simon]

Use this topic to get help compiling HTK on Linux.

[Eric D]

Instructions for stable release 3.4.1, Ubuntu 18.04 (September 2020)

1. Register with HTK and accept the license agreement.

http://htk.eng.cam.ac.uk/register.shtml

2. Once you’ve received the email with your password (should be instant), download the stable release source code

http://htk.eng.cam.ac.uk/download.shtml

3. Extract contents and navigate into the decompressed directory. The README contains specific installation instructions for Linux/OS X/Cygwin and Windows.

$ tar -xvf <FILENAME.tar.gz>
$ cd htk

4. Install the “new” way (default)

$ ./configure
$ make all

The following are obstacles I faced at this step when installing version 3.4.1 on Ubuntu 18.04 in September 2020. You may have other dependency issues/missing header files that I did not experience. Googling the relevant error (ex. “Makefile:96: recipe for target ‘HTKLib/HTKLib.a’ failed”) was usually enough to find a top result that solved my problem.

Error #1: missing header file.

(cd HTKLib && make HTKLib.a) \
|| case “” in *k*) fail=yes;; *) exit 1;; esac;
make[1]: Entering directory ‘/home/eric/Downloads/htk/HTKLib’
gcc -m32 -ansi -D_SVID_SOURCE -DOSS_AUDIO -D’ARCH=”x86_64″‘ -Wall -Wno-switch -g -O2 -I. -DPHNALG -c -o HGraf.o HGraf.c
In file included from HShell.h:40:0,
from HGraf.c:54:
/usr/include/stdio.h:27:10: fatal error: bits/libc-header-start.h: No such file or directory
#include <bits/libc-header-start.h>
^~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
<builtin>: recipe for target ‘HGraf.o’ failed
make[1]: *** [HGraf.o] Error 1
make[1]: Leaving directory ‘/home/eric/Downloads/htk/HTKLib’
Makefile:96: recipe for target ‘HTKLib/HTKLib.a’ failed
make: *** [HTKLib/HTKLib.a] Error 1

Solution:

$ sudo apt-get install gcc-multilib

Add the following line to /etc/apt/sources.list (requires sudo)
deb http://ftp.de.debian.org/debian sid main

$ sudo apt install gcc-multilib
Source: https://stackoverflow.com/questions/59942715/htk-32bit-issue-apt-get-install-gcc-multilib-package-gcc-multilib-has-n

Error #2: missing dependency.

/usr/bin/ld: skipping incompatible //usr/lib/x86_64-linux-gnu/libX11.so when searching for -lX11
/usr/bin/ld: skipping incompatible //usr/lib/x86_64-linux-gnu/libX11.a when searching for -lX11
/usr/bin/ld: cannot find -lX11
collect2: error: ld returned 1 exit status
Makefile:56: recipe for target ‘HSLab’ failed
make[1]: *** [HSLab] Error 1
make[1]: Leaving directory ‘/home/eric/Downloads/htk/HTKTools’
Makefile:108: recipe for target ‘htktools’ failed
make: *** [htktools] Error 1

Solution: I already had this library installed, but needed to install it specifically for 32-bit systems.

$ sudo apt-get install libx11-dev:i386

Source: https://stackoverflow.com/questions/40451054/cant-install-htk-on-linux

Error #3: missing tab character.

(cd HLMTools && make all) \
|| case “” in *k*) fail=yes;; *) exit 1;; esac;
make[1]: Entering directory ‘/home/eric/Downloads/htk/HLMTools’
Makefile:77: *** missing separator. Stop.
make[1]: Leaving directory ‘/home/eric/Downloads/htk/HLMTools’
Makefile:111: recipe for target ‘hlmtools’ failed
make: *** [hlmtools] Error 1

Solution: Just replace the 8-space indent on line 77 of HLMTools/Makefile with a TAB character.
Source: https://github.com/SouthAfricaDigitalScience/htk-deploy/issues/52

5. Install

$ sudo make install

6. Remove the .tar file and htk directory. The program has been installed in /usr/local/bin/ unless specified otherwise in the ./configure step.

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