linux-kernel - Re: [RFC PATCH] perf: add SLANG

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Message-ID: <20120905205439.GD8203@ghostprotocols.net>
Date:	Wed, 5 Sep 2012 13:54:39 -0700
From:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
To:	Liang Li <liang.li@...driver.com>
Cc:	a.p.zijlstra@...llo.nl, paulus@...ba.org, mingo@...hat.com,
	linux-kernel@...r.kernel.org, richard.purdie@...uxfoundation.org
Subject: Re: [RFC PATCH] perf: add SLANG_INC for slang.h

Em Fri, Aug 24, 2012 at 11:10:39AM +0800, Liang Li escreveu:
> CFLAGS was previously hard coded to contain "-I/usr/include/slang" to
> work with hosts that have "/usr/include/slang/slang.h" as well as hosts
> that have "/usr/include/slang.h". This path can cause compile warnings
> like:
> 
> cc1: warning: '/usr/include/slang' doesn't exists.
> 
> or
> 
> cc1: warning: include location "/usr/include/slang" is unsafe for
> cross-compilation [-Wpoison-system-directories]
> 
> Then in some cases warnings become errors if WERROR is enabled hence
> build errors.
> 
> To fix this issue, we can use -idirafter to downgrade the priority of the
> default hard coded path. We can also make the slang include directory
> a variable, to allow the user to specify SLANG_INC and set their own
> include location. And add a '=' prefix to indicate better
> compatibility with sysroot/cross compile cases.

    CC /home/acme/git/build/perf/builtin-diff.o
In file included from util/../ui/keysyms.h:4,
                 from util/hist.h:142,
                 from builtin-diff.c:11:
util/../ui/libslang.h:12:19: error: slang.h: No such file or directory
util/../ui/libslang.h:14:5: error: "SLANG_VERSION" is not defined
In file included from util/../ui/keysyms.h:4,
                 from util/hist.h:142,
                 from util/evsel.h:10,
                 from util/evlist.h:8,
                 from builtin-annotate.c:20:
util/../ui/libslang.h:12:19: error: slang.h: No such file or directory
util/../ui/libslang.h:14:5: error: "SLANG_VERSION" is not defined
builtin-annotate.c: In function ‘hists__find_annotations’:
builtin-annotate.c:122: error: ‘SL_KEY_RIGHT’ undeclared (first use in
this function)
builtin-annotate.c:122: error: (Each undeclared identifier is reported
only once
builtin-annotate.c:122: error: for each function it appears in.)
builtin-annotate.c:134: error: ‘SL_KEY_LEFT’ undeclared (first use in
this function)
make: *** [/home/acme/git/build/perf/builtin-annotate.o] Error 1
make: *** Waiting for unfinished jobs....
make: *** [/home/acme/git/build/perf/builtin-diff.o] Error 1
make: Leaving directory `/home/git/linux/tools/perf'
[acme@...dy linux]$ cat /etc/redhat-release 
Red Hat Enterprise Linux Server release 6.3 (Santiago)
[acme@...dy linux]$
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