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Re: __builtin_expect used in regex

From: Bruno Haible
Subject: Re: __builtin_expect used in regex
Date: Sun, 30 Sep 2018 19:11:12 +0200
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Hi Arnold,

> Nelson, please chime in with a list of the system + compiler combinations
> where gawk needs this patch.

Basically, all platforms with a non-GCC compiler will need this patch.
Think of Solaris cc, HP-UX cc, native Windows with MSVC...

> As I mentioned, this is really a gnulib
> issue and thus I'm reporting it there.

No, it is not an issue in gnulib. In gnulib, the module 'regex' depends
on the module 'builtin-expect' (with the appropriate condition), and this
latter module guarantees that __builtin_expect is defined also on non-GCC

The issue is with gawk's use of gnulib: it does not use gnulib-tool and
instead relies on (error-prone) manual sync from source files from gnulib.


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