linux-kernel - [PATCH v1] selftests/landlock: Build without static libraries

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Message-Id: <20221019200536.2771316-1-mic@digikod.net>
Date:   Wed, 19 Oct 2022 22:05:36 +0200
From:   Mickaël Salaün <mic@...ikod.net>
To:     Shuah Khan <skhan@...uxfoundation.org>
Cc:     Mickaël Salaün <mic@...ikod.net>,
        Anders Roxell <anders.roxell@...aro.org>,
        Guillaume Tucker <guillaume.tucker@...labora.com>,
        Mark Brown <broonie@...nel.org>, linux-kernel@...r.kernel.org,
        linux-kselftest@...r.kernel.org,
        linux-security-module@...r.kernel.org, stable@...r.kernel.org
Subject: [PATCH v1] selftests/landlock: Build without static libraries

The only (forced) static test binary doesn't depend on libcap.  Because
using -lcap on systems that don't have such static library would fail
(e.g. on Arch Linux), let's be more specific and require only dynamic
libcap linking.

Fixes: a52540522c95 ("selftests/landlock: Fix out-of-tree builds")
Cc: Anders Roxell <anders.roxell@...aro.org>
Cc: Guillaume Tucker <guillaume.tucker@...labora.com>
Cc: Mark Brown <broonie@...nel.org>
Cc: Shuah Khan <skhan@...uxfoundation.org>
Cc: stable@...r.kernel.org
Signed-off-by: Mickaël Salaün <mic@...ikod.net>
Link: https://lore.kernel.org/r/20221019200536.2771316-1-mic@digikod.net
---
 tools/testing/selftests/landlock/Makefile | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/tools/testing/selftests/landlock/Makefile b/tools/testing/selftests/landlock/Makefile
index 6632bfff486b..348e2dbdb4e0 100644
--- a/tools/testing/selftests/landlock/Makefile
+++ b/tools/testing/selftests/landlock/Makefile
@@ -3,7 +3,6 @@
 # First run: make -C ../../../.. headers_install
 
 CFLAGS += -Wall -O2 $(KHDR_INCLUDES)
-LDLIBS += -lcap
 
 LOCAL_HDRS += common.h
 
@@ -13,10 +12,12 @@ TEST_GEN_PROGS := $(src_test:.c=)
 
 TEST_GEN_PROGS_EXTENDED := true
 
-# Static linking for short targets:
+# Short targets:
+$(TEST_GEN_PROGS): LDLIBS += -lcap
 $(TEST_GEN_PROGS_EXTENDED): LDFLAGS += -static
 
 include ../lib.mk
 
-# Static linking for targets with $(OUTPUT)/ prefix:
+# Targets with $(OUTPUT)/ prefix:
+$(TEST_GEN_PROGS): LDLIBS += -lcap
 $(TEST_GEN_PROGS_EXTENDED): LDFLAGS += -static

base-commit: 9abf2313adc1ca1b6180c508c25f22f9395cc780
-- 
2.37.2