Install on Ubuntu 11.04

[GoogleCodeExporter]

I am familiar with GNU-Linux, but not familiar with compiling programs; so I 
tried simply downloading the tarball, tar -xjvf it open and then typing "make". 
I get the following:

>> sed -f states.sed detex.l > xxx.l
>> lex  xxx.l
>> make: lex: Command not found
>> make: *** [detex.c] Error 127

I read through the "make" file and there are instuction on how to add commands 
and decomment some things, but I unfortunately do not know what most of it is 
refering to. 

Version of opendetex: 2.8.1
System: Ubuntu 11.04, 64-bit

Any help and how to get this program running would be much appreciated. 

Original issue reported on code.google.com by heroux.martin on 4 Feb 2012 at 1:26

[GoogleCodeExporter]

You don't have the 'lex' program.

Please execute:
sudo apt-get install flex

I will explicitly explain you need 'flex' in the program documentation.

Original comment by piotr.ku...@gmail.com on 4 Feb 2012 at 4:50

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[GoogleCodeExporter]

Installed 'flex' as recommended and then simply ran 'make' at the command line 
and everything seems to be be working. 

Thank you for the quick and useful reply, as well as a good program!

Original comment by heroux.martin on 4 Feb 2012 at 5:24

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