Re: arm/arm64 perf build issue with mainline

[Arnaldo Carvalho de Melo]

Em Thu, Apr 23, 2015 at 08:16:15AM -0600, David Ahern escreveu:
> On 4/23/15 8:04 AM, Will Deacon wrote:
> >+++ b/tools/perf/Makefile
> >@@ -24,7 +24,7 @@ unexport MAKEFLAGS
> >  # (To override it, run 'make JOBS=1' and similar.)
> >  #
> >  ifeq ($(JOBS),)
> >-  JOBS := $(shell egrep -c '^processor|^CPU' /proc/cpuinfo 2>/dev/null)
> >+  JOBS := $(shell getconf _NPROCESSORS_ONLN 2>/dev/null)
> >    ifeq ($(JOBS),0)
> >      JOBS := 1
> >    endif
 
> Certainly a more robust way of doing it but I am concerned this
> might end up breaking others. For Fedora at least getconf is in the
> glibc-common package and there are users that do not build with
> glibc. It is not clear if the build system for those environments
> will have getconf.

Hum, perhaps check if getconf is present, if not fallback to the egrep
-c? I'll try.

- Arnaldo
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