linux-kernel - Re: tools/build: fixdep versus tools/lib/bpf

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Message-ID: <20151028201352.GA14076@krava.brq.redhat.com>
Date:	Wed, 28 Oct 2015 21:13:52 +0100
From:	Jiri Olsa <jolsa@...hat.com>
To:	Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:	Jiri Olsa <jolsa@...nel.org>, Wang Nan <wangnan0@...wei.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: tools/build: fixdep versus tools/lib/bpf

On Wed, Oct 28, 2015 at 01:30:40PM -0300, Arnaldo Carvalho de Melo wrote:
> Hi Jiri, Wang,
> 
> 	I'm getting these while doing 'make -C tools/perf build-test':
> 
>   LD       fixdep-in.o
>   LINK     fixdep
> /bin/sh: /home/acme/git/linux/tools/build/fixdep: Permission denied
> make[6]: *** [bpf.o] Error 1
> make[5]: *** [libbpf-in.o] Error 2
> make[4]: *** [/home/acme/git/linux/tools/lib/bpf/libbpf.a] Error 2
> make[4]: *** Waiting for unfinished jobs....
> 
> 
> It happens at different tests, i.e. seems like a race somewhere in the
> build system, can you take a look? It happens with my perf/ebpf branch.

could not reproduce, but looks like attached patch should help

jirka


---
diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
index 1e2e2d1d26b7..0d19d5447d6c 100644
--- a/tools/perf/Makefile.perf
+++ b/tools/perf/Makefile.perf
@@ -430,7 +430,7 @@ $(LIBAPI)-clean:
 	$(call QUIET_CLEAN, libapi)
 	$(Q)$(MAKE) -C $(LIB_DIR) O=$(OUTPUT) clean >/dev/null
 
-$(LIBBPF): FORCE
+$(LIBBPF): fixdep FORCE
 	$(Q)$(MAKE) -C $(BPF_DIR) O=$(OUTPUT) $(OUTPUT)libbpf.a
 
 $(LIBBPF)-clean:
--
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