Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
From:   Daniel Thompson <daniel.thompson@linaro.org>
To:     Peter Zijlstra <peterz@infradead.org>,
        Ingo Molnar <mingo@redhat.com>,
        Arnaldo Carvalho de Melo <acme@kernel.org>
Cc:     Daniel Thompson <daniel.thompson@linaro.org>,
        Alexander Shishkin <alexander.shishkin@linux.intel.com>,
        Jiri Olsa <jolsa@redhat.com>,
        Namhyung Kim <namhyung@kernel.org>,
        Kim Phillips <kim.phillips@arm.com>,
        linux-kernel@vger.kernel.org, patches@linaro.org
Subject: [PATCH] perf arm64: Use local headers for target compiler
Date:   Thu, 21 Mar 2019 16:13:53 +0000
Message-Id: <20190321161353.16198-1-daniel.thompson@linaro.org>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Currently the set of available syscalls is generated from the
target compilers default <asm-generic/unistd.h>
(i.e. /usr/include/asm-generic/unistd.h on a self-hosted system).
The numeric values are then generated by the host compiler using
tools/include/uapi/asm/unistd.h .

This leads to some nasty version skew problems (including failed perf
builds if you are running a bleeding edge distro and want to build an
older version of perf for testing).

Let's make the target compiler use the local headers too.

Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
---
 tools/perf/arch/arm64/entry/syscalls/mksyscalltbl | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/tools/perf/arch/arm64/entry/syscalls/mksyscalltbl b/tools/perf/arch/arm64/entry/syscalls/mksyscalltbl
index c88fd32563eb..1aca6a839e4f 100755
--- a/tools/perf/arch/arm64/entry/syscalls/mksyscalltbl
+++ b/tools/perf/arch/arm64/entry/syscalls/mksyscalltbl
@@ -56,7 +56,7 @@ create_table()
 	echo "};"
 }

-$gcc -E -dM -x c  $input	       \
-	|sed -ne 's/^#define __NR_//p' \
-	|sort -t' ' -k2 -nu	       \
+$gcc -I $incpath/include/uapi -E -dM -x c  $input \
+	|sed -ne 's/^#define __NR_//p'		  \
+	|sort -t' ' -k2 -nu			  \
 	|create_table
--
2.20.1