getline and _GNU_SORCE

[Jakson Aquino]

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Hi,

I'm trying to avoid the use of the option "rlen". The 
buffer size for reading lines will be dynamically 
determined by GNU extension to libc, the function 
getline. However, I have to add #define _GNU_SOURCE 
before #include <stdio.h>. Will this cause any 
problem?

Anyway, I will create a substitute getline() for MinGW, 
and CygWin which don't have GNU getline. Under 
Windows, statist will be able to read at most a fixed 
amount of bytes (50000) from a line. Under Linux, 
there will be no limit, and no need of the "rlen" 
option. The invocation of Statist becomes simpler, and 
the help on the usage of --xcols and --xsample becomes 
less verbose.

Best,

Jakson
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