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When running [gcc(1)], [-Wall] is the [CommandLine] option that enables all warnings. Generally the first thing people will look for when debugging or helping others with [C]/[C++] code is that it compiles with [-Wall].

[-Wall] warns about a great many things which are normally harmless in normal circumstances but can be dangerous at others. __-pedantic__ warns against things that are technically wrong but cannot lead to problems for [gcc(1)]  and __-pedantic-errors__ issues errors for such quibbles. __-pedantic__ and __-pedantic-errors__ are not usually used unless the code is being written with the intention of porting it to exotic hardware.

It is often a good idea to add [-Wall] to your __CFLAGS__ environment variable. The second thing to do after adding [-Wall] is to add __-g__ so you can get debugging symbols when your program crashes.

Many programmers have a line similar to
 export CFLAGS="-Wall -g"
in their __.profile__.

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Version 6, saved on Sunday, August 24, 2003 8:23:19 am by AristotlePagaltzis

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