Em Fri, Oct 09, 2020 at 02:41:11PM +0200, Jiri Olsa escreveu: > On Fri, Oct 09, 2020 at 02:25:23PM +0200, Vasily Gorbik wrote: > > Currently BUILD_BUG() macro is expanded to smth like the following: > > do { > > extern void __compiletime_assert_0(void) > > __attribute__((error("BUILD_BUG failed"))); > > if (!(!(1))) > > __compiletime_assert_0(); > > } while (0); > > > > If used in a function body this obviously would produce build errors > > with -Wnested-externs and -Werror. > > > > To enable BUILD_BUG() usage in tools/arch/x86/lib/insn.c which perf > > includes in intel-pt-decoder, build perf without -Wnested-externs. > > > > Reported-by: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> > > Signed-off-by: Vasily Gorbik <gor@xxxxxxxxxxxxx> > > that one applied nicely ;-) thanks > > Acked-by: Jiri Olsa <jolsa@xxxxxxxxxx> Thanks, applied. - Arnaldo