Why is ARG_MAX not defined via limits.h?

Posted by Josh Matthews on Stack Overflow See other posts from Stack Overflow or by Josh Matthews
Published on 2008-09-05T19:39:37Z Indexed on 2010/04/23 11:13 UTC
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linux

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limits

On Fedora Core 7, I'm writing some code that relies on ARG_MAX. However, even if I #include <limits.h>, the constant is still not defined. My investigations show that it's present in <sys/linux/limits.h>, but this is supposed to be portable across Win32/Mac/Linux, so directly including it isn't an option. What's going on here?

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