linux-kernel - [PATCH] tools: perf: Fix test build error when bindir contains double slash

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Message-Id: <1438015593-27983-1-git-send-email-pawel.moll@arm.com>
Date:	Mon, 27 Jul 2015 17:46:33 +0100
From:	Pawel Moll <pawel.moll@....com>
To:	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Ingo Molnar <mingo@...hat.com>, Jiri Olsa <jolsa@...hat.com>,
	Namhyung Kim <namhyung@...nel.org>,
	Adrian Hunter <adrian.hunter@...el.com>
Cc:	linux-kernel@...r.kernel.org, Pawel Moll <pawel.moll@....com>
Subject: [PATCH] tools: perf: Fix test build error when bindir contains double slash

When building with a prefix ending with a slash, for example:

	$ make prefix=/usr/local/

one of the perf tests fail to compile due to BUILD_STR macro mishandling
bindir_SQ string containing with two slashes:

	-DBINDIR="BUILD_STR(/usr/local//bin)"

with the following error:

	  CC       tests/attr.o
	tests/attr.c: In function ‘test__attr’:
	tests/attr.c:168:50: error: expected ‘)’ before ‘;’ token
	  snprintf(path_perf, PATH_MAX, "%s/perf", BINDIR);
                                                  ^
	tests/attr.c:176:1: error: expected ‘;’ before ‘}’ token
	 }
	 ^
	tests/attr.c:176:1: error: control reaches end of non-void function [-Werror=return-type]
	 }
	 ^
	cc1: all warnings being treated as errors

This patch works around the problem by "cleaning" the bindir string
using make's realpath function.

Signed-off-by: Pawel Moll <pawel.moll@....com>
---
 tools/perf/config/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/config/Makefile b/tools/perf/config/Makefile
index b4a9c29..59e8376 100644
--- a/tools/perf/config/Makefile
+++ b/tools/perf/config/Makefile
@@ -638,7 +638,7 @@ ifndef DESTDIR
 prefix ?= $(HOME)
 endif
 bindir_relative = bin
-bindir = $(prefix)/$(bindir_relative)
+bindir = $(realpath $(prefix)/$(bindir_relative))
 mandir = share/man
 infodir = share/info
 perfexecdir = libexec/perf-core
-- 
2.1.4

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