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linux-next/tools/testing/selftests/rseq/Makefile
Michael Ellerman ef89d05451 selftests/rseq: Fix out-of-tree compilation
Currently if you build with O=... the rseq tests don't build:

  $ make O=$PWD/output -C tools/testing/selftests/ TARGETS=rseq
  make: Entering directory '/linux/tools/testing/selftests'
  ...
  make[1]: Entering directory '/linux/tools/testing/selftests/rseq'
  gcc -O2 -Wall -g -I./ -I../../../../usr/include/ -L./ -Wl,-rpath=./  -shared -fPIC rseq.c -lpthread -o /linux/output/rseq/librseq.so
  gcc -O2 -Wall -g -I./ -I../../../../usr/include/ -L./ -Wl,-rpath=./  basic_test.c -lpthread -lrseq -o /linux/output/rseq/basic_test
  /usr/bin/ld: cannot find -lrseq
  collect2: error: ld returned 1 exit status

This is because the library search path points to the source
directory, not the output.

We can fix it by changing the library search path to $(OUTPUT).

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
2020-02-20 08:57:12 -07:00

39 lines
1.1 KiB
Makefile

# SPDX-License-Identifier: GPL-2.0+ OR MIT
ifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),)
CLANG_FLAGS += -no-integrated-as
endif
CFLAGS += -O2 -Wall -g -I./ -I../../../../usr/include/ -L$(OUTPUT) -Wl,-rpath=./ \
$(CLANG_FLAGS)
LDLIBS += -lpthread
# Own dependencies because we only want to build against 1st prerequisite, but
# still track changes to header files and depend on shared object.
OVERRIDE_TARGETS = 1
TEST_GEN_PROGS = basic_test basic_percpu_ops_test param_test \
param_test_benchmark param_test_compare_twice
TEST_GEN_PROGS_EXTENDED = librseq.so
TEST_PROGS = run_param_test.sh
TEST_FILES := settings
include ../lib.mk
$(OUTPUT)/librseq.so: rseq.c rseq.h rseq-*.h
$(CC) $(CFLAGS) -shared -fPIC $< $(LDLIBS) -o $@
$(OUTPUT)/%: %.c $(TEST_GEN_PROGS_EXTENDED) rseq.h rseq-*.h
$(CC) $(CFLAGS) $< $(LDLIBS) -lrseq -o $@
$(OUTPUT)/param_test_benchmark: param_test.c $(TEST_GEN_PROGS_EXTENDED) \
rseq.h rseq-*.h
$(CC) $(CFLAGS) -DBENCHMARK $< $(LDLIBS) -lrseq -o $@
$(OUTPUT)/param_test_compare_twice: param_test.c $(TEST_GEN_PROGS_EXTENDED) \
rseq.h rseq-*.h
$(CC) $(CFLAGS) -DRSEQ_COMPARE_TWICE $< $(LDLIBS) -lrseq -o $@