On Mon, Feb 10, 2020 at 12:03:26PM -0700, Simon Glass wrote: > 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.
Well, lets see what's going on here a bit more. We're at the point right now where it's painful that we're on gcc-7.3 for the most part and can't easily / universally move up to a 9.something. -- Tom
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