Re: [PATCH 06/13] perf tools: Add compression id into struct kmod_path

[Arnaldo Carvalho de Melo]

Em Fri, Aug 17, 2018 at 03:23:15PM -0300, Arnaldo Carvalho de Melo escreveu:
> Em Fri, Aug 17, 2018 at 11:48:06AM +0200, Jiri Olsa escreveu:
> >  static const struct {
> >  	const char *fmt;
> >  	int (*decompress)(const char *input, int output);
> >  } compressions[] = {
> > +	[COMP_ID__NONE] = { 0 },
> 
> 
> This broke the build in many places, problems of this kind:
> 
>   CC       /tmp/build/perf/util/dso.o
>   LD       /tmp/build/perf/scripts/python/Perf-Trace-Util/libperf-in.o
>   LD       /tmp/build/perf/scripts/libperf-in.o
>   CC       /tmp/build/perf/trace/beauty/clone.o
>   CC       /tmp/build/perf/util/symbol.o
> util/dso.c:201:24: error: missing field 'decompress' initializer [-Werror,-Wmissing-field-initializers]
>         [COMP_ID__NONE] = { 0 },
>                               ^
> 1 error generated.
>   CC       /tmp/build/perf/trace/beauty/fcntl.o
> mv: cannot stat '/tmp/build/perf/util/.dso.o.tmp': No such file or directory
> /git/linux/tools/build/Makefile.build:96: recipe for target '/tmp/build/perf/util/dso.o' failed
> 
> If we look just at those that failed, its several gcc versions:
> 
>   11     9.91 centos:5                      : FAIL gcc (GCC) 4.1.2 20080704 (Red Hat 4.1.2-55)
>   12    14.34 centos:6                      : FAIL gcc (GCC) 4.4.7 20120313 (Red Hat 4.4.7-23)
>   16    47.50 debian:9                      : FAIL gcc (Debian 6.3.0-18+deb9u1) 6.3.0 20170516
>   28    53.92 fedora:25                     : FAIL gcc (GCC) 6.4.1 20170727 (Red Hat 6.4.1-1)
>   29    60.75 fedora:26                     : FAIL gcc (GCC) 7.3.1 20180130 (Red Hat 7.3.1-2)
>   30    90.76 fedora:27                     : FAIL gcc (GCC) 7.3.1 20180712 (Red Hat 7.3.1-6)
>   41    12.78 oraclelinux:6                 : FAIL gcc (GCC) 4.4.7 20120313 (Red Hat 4.4.7-23.0.1)
>   43    12.85 ubuntu:12.04.5                : FAIL gcc (Ubuntu/Linaro 4.6.3-1ubuntu5) 4.6.3
>   46    45.56 ubuntu:16.04                  : FAIL gcc (Ubuntu 5.4.0-6ubuntu1~16.04.10) 5.4.0 20160609
>   54    49.60 ubuntu:17.10                  : FAIL gcc (Ubuntu 7.2.0-8ubuntu3.2) 7.2.0

Sorry, gcc eats this with gusto, its just clang that is not taking it,
for instance, this is the one in fedora:27:

clang version 5.0.2 (tags/RELEASE_502/final)

- Arnaldo