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Re: Bug #593838: AX_CFLAGS_GCC_OPTION misuses AS_VAR_PUSHDEF variable

From: Ben Pfaff
Subject: Re: Bug #593838: AX_CFLAGS_GCC_OPTION misuses AS_VAR_PUSHDEF variable
Date: Fri, 01 Oct 2010 09:26:16 -0700
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.2 (gnu/linux)

Paolo Bonzini <address@hidden> writes:

> On 10/01/2010 03:57 PM, Eric Blake wrote:
>> Either way, the name of the indirect variable being assigned is
>> $prefix_a_b, whether you use pre- or post-2.67.  Why is 'a=b' being
>> passed instead of 'a_b' in the first place?  I'd need to see more
>> context of the real macro usage (rather than this trivial test case) to
>> see whether the efficiency hit is a corner case of a=b is likely in real
>> life and thus a performance regression, or just an extreme that is not
>> worth worrying about.
> Given it's about GCC options, I'd guess the real parameter was akin to
> -Wformat=2 and it's building something like
> ax_cv_gcc_option__Wformat_2.

Yes, the original bug report was for the behavior of:

See http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=593838
Ben Pfaff 

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