Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1532069

Re: [PATCH v2] Fix objtool with clang

From Jiri Olsa <jolsa@redhat.com>
Newsgroups linux.kernel
Subject Re: [PATCH v2] Fix objtool with clang
Date 2016-11-29 11:00 +0100
Message-ID <sINmF-6Mq-15@gated-at.bofh.it> (permalink)
References (3 earlier) <sIvJ7-3HN-5@gated-at.bofh.it> <sIw2t-3Ow-9@gated-at.bofh.it> <sIxrA-4y6-9@gated-at.bofh.it> <sIA66-6pe-23@gated-at.bofh.it> <sIN3j-6FC-15@gated-at.bofh.it>
Organization linux.* mail to news gateway

Show all headers | View raw

On Tue, Nov 29, 2016 at 10:32:24AM +0100, Jiri Olsa wrote:
> On Mon, Nov 28, 2016 at 05:40:46PM -0200, Arnaldo Carvalho de Melo wrote:
> 
> SNIP
> 
> >   LD       /tmp/build/perf/pmu-events/pmu-events-in.o
> >   CC       /tmp/build/perf/arch/x86/util/intel-bts.o
> >   CC       /tmp/build/perf/builtin-buildid-cache.o
> >   CC       /tmp/build/perf/builtin-list.o
> >   LD       /tmp/build/perf/arch/x86/util/libperf-in.o
> >   MKDIR    /tmp/build/perf/arch/x86/tests/
> >   CC       /tmp/build/perf/arch/x86/tests/regs_load.o
> > /tmp/build/perf/.plugin_jbd2.o.cmd:3: *** empty variable name.  Stop.
> > Makefile:192: recipe for target '/tmp/build/perf/plugin_jbd2-in.o' failed
> > make[2]: *** [/tmp/build/perf/plugin_jbd2-in.o] Error 2
> > Makefile.perf:591: recipe for target '/tmp/build/perf/libtraceevent-dynamic-list' failed
> > make[1]: *** [/tmp/build/perf/libtraceevent-dynamic-list] Error 2
> > make[1]: *** Waiting for unfinished jobs....
> 
> ok, reproduced..
> 
> the commit changes the output of the depfile for some reason,
> and our fixdep does not handle it correctly and produce wrong
> cmd file that failed to parse.. checking for fix
> 
> depfile changes ('+' is after the change):
> 
> -plugin_jbd2.o: plugin_jbd2.c /usr/include/stdc-predef.h \
> +plugin_jbd2.o plugin_jbd2.o: plugin_jbd2.c /usr/include/stdc-predef.h \
> 
> jirka

so Fedora 25 puts old target name in the generated dependencies
in case you split the -Wp options.. while Fedora 24 the old way

and both F24 and F25 shows me same gcc version 6.2.1
(note that just the first command output with 2 targets is wrong for us)

Fedora 25:
[root@intel-denlow-r-02 ~]# gcc -o ex.o -c -Wp,-MD,krava -Wp,-MT,krava -g ex.c
[root@intel-denlow-r-02 ~]# cat krava
ex.o krava: ex.c /usr/include/stdc-predef.h /usr/include/stdio.h \
 /usr/include/features.h /usr/include/sys/cdefs.h \
 /usr/include/bits/wordsize.h /usr/include/gnu/stubs.h \
 /usr/include/gnu/stubs-64.h \
 /usr/lib/gcc/x86_64-redhat-linux/6.2.1/include/stddef.h \
 /usr/include/bits/types.h /usr/include/bits/typesizes.h \
 /usr/include/libio.h /usr/include/_G_config.h /usr/include/wchar.h \
 /usr/lib/gcc/x86_64-redhat-linux/6.2.1/include/stdarg.h \
 /usr/include/bits/stdio_lim.h /usr/include/bits/sys_errlist.h

[root@intel-denlow-r-02 ~]# gcc -o ex.o -c -Wp,-MD,krava,-MT,krava -g ex.c
[root@intel-denlow-r-02 ~]# cat krava
krava: ex.c /usr/include/stdc-predef.h /usr/include/stdio.h \
 /usr/include/features.h /usr/include/sys/cdefs.h \
 /usr/include/bits/wordsize.h /usr/include/gnu/stubs.h \
 /usr/include/gnu/stubs-64.h \
 /usr/lib/gcc/x86_64-redhat-linux/6.2.1/include/stddef.h \
 /usr/include/bits/types.h /usr/include/bits/typesizes.h \
 /usr/include/libio.h /usr/include/_G_config.h /usr/include/wchar.h \
 /usr/lib/gcc/x86_64-redhat-linux/6.2.1/include/stdarg.h \
 /usr/include/bits/stdio_lim.h /usr/include/bits/sys_errlist.h


Fedora 24:
[jolsa@krava trash]$ gcc -o ex.o -c -Wp,-MD,krava -Wp,-MT,krava -g ex.c
[jolsa@krava trash]$ cat krava
krava: ex.c /usr/include/stdc-predef.h /usr/include/stdio.h \
 /usr/include/features.h /usr/include/sys/cdefs.h \
 /usr/include/bits/wordsize.h /usr/include/gnu/stubs.h \
 /usr/include/gnu/stubs-64.h \
 /usr/lib/gcc/x86_64-redhat-linux/6.2.1/include/stddef.h \
 /usr/include/bits/types.h /usr/include/bits/typesizes.h \
 /usr/include/libio.h /usr/include/_G_config.h /usr/include/wchar.h \
 /usr/lib/gcc/x86_64-redhat-linux/6.2.1/include/stdarg.h \
 /usr/include/bits/stdio_lim.h /usr/include/bits/sys_errlist.h

[jolsa@krava trash]$ gcc -o ex.o -c -Wp,-MD,krava-Wp,-MT,krava -g ex.c
[jolsa@krava trash]$ cat krava
krava: ex.c /usr/include/stdc-predef.h /usr/include/stdio.h \
 /usr/include/features.h /usr/include/sys/cdefs.h \
 /usr/include/bits/wordsize.h /usr/include/gnu/stubs.h \
 /usr/include/gnu/stubs-64.h \
 /usr/lib/gcc/x86_64-redhat-linux/6.2.1/include/stddef.h \
 /usr/include/bits/types.h /usr/include/bits/typesizes.h \
 /usr/include/libio.h /usr/include/_G_config.h /usr/include/wchar.h \
 /usr/lib/gcc/x86_64-redhat-linux/6.2.1/include/stdarg.h \
 /usr/include/bits/stdio_lim.h /usr/include/bits/sys_errlist.h


I'll make fixdep to deal with that and try to have someone from gcc to clarify on this

jirka

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

[PATCH] Fix objtool with clang Peter Foley <pefoley2@pefoley.com> - 2016-11-26 23:30 +0100
  Re: [PATCH] Fix objtool with clang Jiri Olsa <jolsa@redhat.com> - 2016-11-27 17:20 +0100
    [PATCH v2] Fix objtool with clang Peter Foley <pefoley2@pefoley.com> - 2016-11-28 03:50 +0100
      Re: [PATCH v2] Fix objtool with clang Jiri Olsa <jolsa@redhat.com> - 2016-11-28 12:40 +0100
        Re: [PATCH v2] Fix objtool with clang Arnaldo Carvalho de Melo <acme@redhat.com> - 2016-11-28 16:10 +0100
          Re: [PATCH v2] Fix objtool with clang Peter Foley <pefoley2@pefoley.com> - 2016-11-28 16:30 +0100
            Re: [PATCH v2] Fix objtool with clang Jiri Olsa <jolsa@redhat.com> - 2016-11-28 18:00 +0100
              Re: [PATCH v2] Fix objtool with clang Arnaldo Carvalho de Melo <acme@redhat.com> - 2016-11-28 20:50 +0100
                Re: [PATCH v2] Fix objtool with clang Jiri Olsa <jolsa@redhat.com> - 2016-11-28 21:10 +0100
                Re: [PATCH v2] Fix objtool with clang Jiri Olsa <jolsa@redhat.com> - 2016-11-29 10:40 +0100
                Re: [PATCH v2] Fix objtool with clang Jiri Olsa <jolsa@redhat.com> - 2016-11-29 11:00 +0100
                Re: [PATCH v2] Fix objtool with clang Jiri Olsa <jolsa@redhat.com> - 2016-11-29 15:30 +0100
                Re: [PATCH v2] Fix objtool with clang Jiri Olsa <jolsa@redhat.com> - 2016-11-29 15:40 +0100
                Re: [PATCH v2] Fix objtool with clang Arnaldo Carvalho de Melo <acme@redhat.com> - 2016-11-29 15:50 +0100
                Re: [PATCH v2] Fix objtool with clang Jiri Olsa <jolsa@redhat.com> - 2016-11-29 16:30 +0100
                [PATCHv3] tools build: Make fixdep parsing wait for last target Jiri Olsa <jolsa@redhat.com> - 2016-12-01 14:10 +0100
                Re: [PATCHv3] tools build: Make fixdep parsing wait for last target Peter Foley <pefoley2@pefoley.com> - 2016-12-01 18:50 +0100
                Re: [PATCHv3] tools build: Make fixdep parsing wait for last target Arnaldo Carvalho de Melo <acme@redhat.com> - 2016-12-01 20:00 +0100
                Re: [PATCHv3] tools build: Make fixdep parsing wait for last target Jiri Olsa <jolsa@redhat.com> - 2016-12-02 09:50 +0100
                Re: [PATCHv3] tools build: Make fixdep parsing wait for last target Jiri Olsa <jolsa@redhat.com> - 2016-12-02 10:20 +0100
                Re: [PATCHv3] tools build: Make fixdep parsing wait for last target Arnaldo Carvalho de Melo <acme@redhat.com> - 2016-12-02 16:20 +0100
                [tip:perf/core] tools build: Make fixdep parsing wait for last  target tip-bot for Jiri Olsa <tipbot@zytor.com> - 2016-12-06 09:30 +0100
                Re: [PATCH v2] Fix objtool with clang Arnaldo Carvalho de Melo <acme@redhat.com> - 2016-11-29 15:40 +0100
            Re: [PATCH v2] Fix objtool with clang Arnaldo Carvalho de Melo <acme@redhat.com> - 2016-11-28 20:40 +0100
      [tip:perf/core] tools build: Fix objtool build with clang tip-bot for Peter Foley <tipbot@zytor.com> - 2016-12-06 09:30 +0100

csiph-web