[dm-devel] [PATCH v2 08/12] libmultipath: create separate .so for unit tests

From: mwilck@suse.com
To: Christophe Varoqui <christophe.varoqui@opensvc.com>,
	Benjamin Marzinski <bmarzins@redhat.com>
Cc: dm-devel@redhat.com, Martin Wilck <mwilck@suse.com>
Subject: [dm-devel] [PATCH v2 08/12] libmultipath: create separate .so for unit tests
Date: Fri, 16 Oct 2020 12:42:35 +0200	[thread overview]
Message-ID: <20201016104239.8217-9-mwilck@suse.com> (raw)
In-Reply-To: <20201016104239.8217-1-mwilck@suse.com>

From: Martin Wilck <mwilck@suse.com>

The unit tests use a lot of internal symbols that we don't want
to add to the ABI if we don't have to. As long as we don't
have to make incompatible changes to functions, we can work around
that by simply using a non-versioned library for the unit tests.
Therefore we add a seperate rule here. Do this before actually
adding a version script, to avoid breakage during bisection.

Signed-off-by: Martin Wilck <mwilck@suse.com>
---
 libmultipath/Makefile |  7 +++++++
 tests/Makefile        | 10 ++++++----
 2 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/libmultipath/Makefile b/libmultipath/Makefile
index af5bb77..cf13561 100644
--- a/libmultipath/Makefile
+++ b/libmultipath/Makefile
@@ -74,6 +74,13 @@ $(LIBS): $(OBJS)
 $(DEVLIB): $(LIBS)
 	$(LN) $(LIBS) $@
 
+../tests/$(LIBS): $(OBJS) $(VERSION_SCRIPT)
+	$(CC) $(LDFLAGS) $(SHARED_FLAGS) -Wl,-soname=`basename $@` \
+		-o $@ $(OBJS) $(LIBDEPS)
+	$(LN) $@ ${@:.so.0=.so}
+
+test-lib:	../tests/$(LIBS)
+
 install: all
 	$(INSTALL_PROGRAM) -d $(DESTDIR)$(syslibdir)
 	$(INSTALL_PROGRAM) -m 755 $(LIBS) $(DESTDIR)$(syslibdir)/$(LIBS)
diff --git a/tests/Makefile b/tests/Makefile
index 502377f..f6ef16a 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -10,7 +10,7 @@ W_MISSING_INITIALIZERS := $(call TEST_MISSING_INITIALIZERS)
 
 CFLAGS += $(BIN_CFLAGS) -I$(multipathdir) -I$(mpathcmddir) \
 	-Wno-unused-parameter $(W_MISSING_INITIALIZERS)
-LIBDEPS += -L$(multipathdir) -L$(mpathcmddir) -lmultipath -lmpathcmd -lcmocka
+LIBDEPS += -L. -L$(mpathcmddir) -lmultipath -lmpathcmd -lcmocka
 
 TESTS := uevent parser util dmevents hwtable blacklist unaligned vpd pgpolicy \
 	 alias directio valid devt
@@ -67,7 +67,7 @@ lib/libchecktur.so:
 
 %.out:	%-test lib/libchecktur.so
 	@echo == running $< ==
-	@LD_LIBRARY_PATH=$(multipathdir):$(mpathcmddir) ./$< >$@
+	@LD_LIBRARY_PATH=.:$(mpathcmddir) ./$< >$@
 
 %.vgr:  %-test lib/libchecktur.so
 	@echo == running valgrind for $< ==
@@ -77,7 +77,7 @@ lib/libchecktur.so:
 OBJS = $(TESTS:%=%.o) test-lib.o
 
 test_clean:
-	$(RM) $(TESTS:%=%.out) $(TESTS:%=%.vgr)
+	$(RM) $(TESTS:%=%.out) $(TESTS:%=%.vgr) *.so*
 
 valgrind_clean:
 	$(RM) $(TESTS:%=%.vgr)
@@ -97,12 +97,14 @@ dep_clean:
 	@sed -n 's/^.*__wrap_\([a-zA-Z0-9_]*\).*$$/-Wl,--wrap=\1/p' $< | \
 		sort -u | tr '\n' ' ' >$@
 
+libmultipath.so.0:
+	$(MAKE) -C $(multipathdir) test-lib
 
 # COLON will get expanded during second expansion below
 COLON:=:
 .SECONDEXPANSION:
 %-test:	%.o %.o.wrap $$($$@_OBJDEPS) $$($$@_TESTDEPS) $$($$@_TESTDEPS$$(COLON).o=.o.wrap) \
-		$(multipathdir)/libmultipath.so Makefile
+		libmultipath.so.0 Makefile
 	$(CC) $(CFLAGS) -o $@ $(LDFLAGS) $< $($@_TESTDEPS) $($@_OBJDEPS) \
 		$(LIBDEPS) $($@_LIBDEPS) \
 		$(shell cat $<.wrap) $(foreach dep,$($@_TESTDEPS),$(shell cat $(dep).wrap))
-- 
2.28.0


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