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.
Paolo
