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Other than -Wall what other warnings have people found useful?
http://gcc.gnu.org/onlinedocs/gcc-4.3.2/gcc/Warning-Options.html
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If -Wfatal-errors is also specified, then -Wfatal-errors takes precedence over this option. Inhibit all warning messages. Make all warnings into errors.
GCC 4.3+ now has -Q --help=warnings , and you can even specify --help=warnings,C to just print out the C related warnings.
gcc -Wall enables all compiler's warning messages. This option should always be used, in order to generate better code.
You can use the -Werror compiler flag to turn all or some warnings into errors. Show activity on this post. You can use -fdiagnostics-show-option to see the -W option that applies to a particular warning. Unfortunately, in this case there isn't any specific option that covers that warning.
I routinely use:
gcc -m64 -std=c99 -pedantic -Wall -Wshadow -Wpointer-arith -Wcast-qual \ -Wstrict-prototypes -Wmissing-prototypes This set catches a lot for people unused to it (people whose code I get to compile with those flags for the first time); it seldom gives me a problem (though -Wcast-qual is occasionally a nuisance).
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