Hi Stephen. On Mon, 10 Feb 2020 at 11:28, Stephen Warren <[email protected]> wrote: > > On 2/8/20 8:21 AM, Bin Meng wrote: > > On Sat, Feb 8, 2020 at 10:53 PM Simon Glass <[email protected]> wrote: > >> > >> Some compilers produce a warning about 'child' being used before init. > >> Silence this by setting to NULL at the start. > > > > Should be a compiler bug I think. Which compiler has such issue? > > gcc 7.2.1 (Linaro build x86 -> ARM cross-compiler) > > I don't believe this is a compiler bug.
Well it is 'fixed' in 7.3. > > For the compiler *not* to emit this warning, it would have to apply > cross-function data flow analysis, which isn't something guaranteed by > the C standard IIRC, since it's a very hard problem in general. So, not > a compiler *bug* even if we'd like to see the compiler be smart about > these things. Yes it is hard. I do think it is worth avoiding these problems where we can. But in general I build with the latest kernel toolchain. I think, sadly, if we really want to solve this problem we may need a way to make buildman automatically build with multiple toolchains. Regards, Simon
