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Turn off C compiler warnings in automake

From: Alex Vong
Subject: Turn off C compiler warnings in automake
Date: Mon, 22 Jun 2015 21:44:23 +0800

Hi everyone,

Is there a portable way to silent C compiler warnings in automake? I
think of 2 ways of doing it but both ways have serious limitations.

1. hand-craft automake rules with `2>/dev/null' appended on the command
limitation: tedious, defeat the purpose of using automake (not _auto_ enough)

2. add `-w' to myprog_CFLAGS
limitation: it is GCC-specific and not portable (c99 does not specify
this switch)

Currently, I am using method 1 (hand-crafting) to achieve per-object
flags. However, I learnt that I can use convience library to simulate
per-object flags so I rewrite my to use convience library,
It looks much cleaner!

Is there any easy way to turn off c compiler warnings (those printed
to stderr) portably?

Thanks all!

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