linux-kernel - [PATCH 1/1] selftests: timers: use LDLIBS instead of LDFLAGS to link against libpthread

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Message-Id: <20170628091810.30484-1-fathi.boudra@linaro.org>
Date:   Wed, 28 Jun 2017 12:18:10 +0300
From:   Fathi Boudra <fathi.boudra@...aro.org>
To:     linux-kselftest@...r.kernel.org, Shuah Khan <shuah@...nel.org>
Cc:     linux-kernel@...r.kernel.org, John Stultz <john.stultz@...aro.org>,
        Denys Dmytriyenko <denys@...com>,
        Fathi Boudra <fathi.boudra@...aro.org>
Subject: [PATCH 1/1] selftests: timers: use LDLIBS instead of LDFLAGS to link against libpthread

timers test fails to build due to undefined reference:

 aarch64-linaro-linux-gcc --sysroot=/build/tmp-rpb-glibc/sysroots/hikey
 -O2 -pipe -g -feliminate-unused-debug-types -O3 -Wl,-no-as-needed -Wall
 -DKTEST  -Wl,-O1 -Wl,--hash-style=gnu -Wl,--as-needed -lrt -lpthread
 posix_timers.c
 -o /build/tmp-rpb-glibc/work/hikey-linaro-linux/kselftests/4.12-r0/linux-4.12-rc7/tools/testing/selftests/timers/posix_timers
 /tmp/cc1FTZzT.o: In function `check_timer_create':
 /usr/src/debug/kselftests/4.12-r0/linux-4.12-rc7/tools/testing/selftests/timers/posix_timers.c:157:
 undefined reference to `timer_create'
 /usr/src/debug/kselftests/4.12-r0/linux-4.12-rc7/tools/testing/selftests/timers/posix_timers.c:170:
 undefined reference to `timer_settime'
 collect2: error: ld returned 1 exit status

Use LDLIBS instead of LDFLAGS to properly link against libpthread and fix
this build issue.

Signed-off-by: Denys Dmytriyenko <denys@...com>
Signed-off-by: Fathi Boudra <fathi.boudra@...aro.org>
---
 tools/testing/selftests/timers/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/timers/Makefile b/tools/testing/selftests/timers/Makefile
index 5fa1d7e9a915..f48d7ca9d9b1 100644
--- a/tools/testing/selftests/timers/Makefile
+++ b/tools/testing/selftests/timers/Makefile
@@ -1,6 +1,6 @@
 BUILD_FLAGS = -DKTEST
 CFLAGS += -O3 -Wl,-no-as-needed -Wall $(BUILD_FLAGS)
-LDFLAGS += -lrt -lpthread
+LDLIBS += -lrt -lpthread
 
 # these are all "safe" tests that don't modify
 # system time or require escalated privileges
-- 
2.13.0