Multiple Autotools improvements

- Defines some dependencies between shared libraries
- updates version.h only when version changes

Updating version.h on each "make" and "make install" was causing issues with
parallel builds. "make install" was re-linking vpp binary due to "updated"
version.h and in parallel it was re-linking shared libraries as part of
installation process. That was resulting on sporadic build failures.

Change-Id: I2a27ae1aea6a7a4100822018e095a60dd48d39ca
Signed-off-by: Damjan Marion <damarion@cisco.com>

5 files changed, 41 insertions, 16 deletions

diff --git a/src/svm.am b/src/svm.am
index d91eaa272a2..2cd385bd037 100644
--- a/src/svm.am
+++ b/src/svm.am
@@ -15,14 +15,17 @@ bin_PROGRAMS += svmtool svmdbtool
 
 nobase_include_HEADERS += svm/svm.h svm/ssvm.h svm/svmdb.h
 
-libsvmdir = ${libdir}
-libsvm_LTLIBRARIES = libsvm.la libsvmdb.la
+lib_LTLIBRARIES += libsvm.la libsvmdb.la
 
+libsvm_la_LIBADD = libvppinfra.la -lrt -lpthread
+libsvm_la_DEPENDENCIES = libvppinfra.la
 libsvm_la_SOURCES = svm/svm.c svm/ssvm.c
 
 svmtool_SOURCES = svm/svmtool.c
 svmtool_LDADD = libsvm.la libvppinfra.la -lpthread -lrt
 
+libsvmdb_la_LIBADD = libvppinfra.la libsvm.la
+libsvmdb_la_DEPENDENCIES = libvppinfra.la libsvm.la
 libsvmdb_la_SOURCES = svm/svmdb.c
 
 svmdbtool_SOURCES = svm/svmdbtool.c
diff --git a/src/vlib-api.am b/src/vlib-api.am
index 80eb760d108..128cc07a1d5 100644
--- a/src/vlib-api.am
+++ b/src/vlib-api.am
@@ -14,6 +14,8 @@
 lib_LTLIBRARIES += libvlibapi.la libvlibmemory.la libvlibmemoryclient.la \
 	           libvlibsocket.la
 
+libvlibapi_la_LIBADD = libvppinfra.la
+libvlibapi_la_DEPENDENCIES = libvppinfra.la libvlib.la
 libvlibapi_la_SOURCES = 			\
 	vlibapi/api.h				\
         vlibapi/api_helper_macros.h		\
@@ -22,6 +24,8 @@ libvlibapi_la_SOURCES = 			\
 
 nobase_include_HEADERS += vlibapi/api.h vlibapi/api_helper_macros.h
 
+libvlibmemory_la_LIBADD = libvppinfra.la libsvm.la -lpthread
+libvlibmemory_la_DEPENDENCIES = libvppinfra.la libsvm.la libvlib.la
 libvlibmemory_la_SOURCES =			\
 	vlibmemory/api.h			\
 	vlibmemory/memclnt.api			\
@@ -32,6 +36,8 @@ libvlibmemory_la_SOURCES =			\
 	vlibmemory/unix_shared_memory_queue.c	\
 	vlibmemory/unix_shared_memory_queue.h
 
+libvlibmemoryclient_la_LIBADD = libvppinfra.la libsvm.la -lpthread
+libvlibmemoryclient_la_DEPENDENCIES = libvppinfra.la libsvm.la libvlib.la
 libvlibmemoryclient_la_SOURCES = 		\
 	vlibmemory/api.h			\
 	vlibmemory/memclnt.api			\
@@ -49,6 +55,8 @@ nobase_include_HEADERS +=			\
 	vlibmemory/unix_shared_memory_queue.h 	\
 	vlibmemory/memclnt.api.h
 
+libvlibsocket_la_LIBADD = libvppinfra.la
+libvlibsocket_la_DEPENDENCIES = libvppinfra.la
 libvlibsocket_la_SOURCES =			\
 	vlibsocket/api.h			\
 	vlibsocket/sockclnt.api			\
diff --git a/src/vnet.am b/src/vnet.am
index 1baa1d25afb..16ade4d1228 100644
--- a/src/vnet.am
+++ b/src/vnet.am
@@ -14,7 +14,12 @@
 libvnet_la_SOURCES =
 libvnetplugin_la_SOURCES =
 
-libvnet_la_LIBAD = libvppinfra.la libvlib.la libsvm.la
+libvnet_la_LIBADD = libvppinfra.la libsvm.la
+libvnet_la_DEPENDENCIES = libvppinfra.la libvlib.la libsvmdb.la libsvm.la libvlibapi.la libvlibmemory.la libvlibmemoryclient.la
+
+if WITH_IPV6SR
+libvnet_la_LIBADD += -lcrypto
+endif
 
 ########################################
 # Generic stuff
diff --git a/src/vpp-api-test.am b/src/vpp-api-test.am
index 66d223c0a05..c788666eae7 100644
--- a/src/vpp-api-test.am
+++ b/src/vpp-api-test.am
@@ -11,6 +11,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+libvatplugin_la_LIBADD = libvppinfra.la
+libvatplugin_la_DEPENDENCIES = libvppinfra.la
 libvatplugin_la_SOURCES = \
   vat/plugin_api.c
 
diff --git a/src/vpp.am b/src/vpp.am
index 77010e1f36a..3bb2c1beaae 100644
--- a/src/vpp.am
+++ b/src/vpp.am
@@ -44,19 +44,30 @@ nobase_include_HEADERS +=			\
 
 API_FILES += vpp/api/vpe.api
 
-BUILT_SOURCES += vpp/app/version.h
+BUILT_SOURCES += .version
 
 vpp/app/version.o:	vpp/app/version.h
 
-.PHONY:	vpp/app/version.h
+.PHONY:	.version
+
+VPP_VERSION = $(shell $(srcdir)/scripts/version)
+
+# update version.h only when version changes, to avoid
+# unnecessary re-linking of vpp binary
+
+.version:
+	@if [ "$$(cat .version 2> /dev/null)" != "$(VPP_VERSION)" ] ; then		\
+	  f="vpp/app/version.h" 							;\
+	  echo "  VERSION  $$f ($(VPP_VERSION))"					;\
+	  echo $(VPP_VERSION) > .version						;\
+	  echo "#define VPP_BUILD_DATE \"$$(date)\"" > $$f 				;\
+	  echo "#define VPP_BUILD_USER \"$$(whoami)\"" >> $$f 				;\
+	  echo "#define VPP_BUILD_HOST \"$$(hostname)\"" >> $$f				;\
+	  echo -n "#define VPP_BUILD_TOPDIR " >> $$f					;\
+	  echo "\"$$(cd $(srcdir) && git rev-parse --show-toplevel)\"" >> $$f 		;\
+	  echo "#define VPP_BUILD_VER \"$(VPP_VERSION)\"" >> $$f			;\
+	fi
 
-vpp/app/version.h:
-	@echo "  VERSION " $@
-	@echo "#define VPP_BUILD_DATE \"$$(date)\"" > $@
-	@echo "#define VPP_BUILD_USER \"$$(whoami)\"" >> $@
-	@echo "#define VPP_BUILD_HOST \"$$(hostname)\"" >> $@
-	@echo "#define VPP_BUILD_TOPDIR \"$$(cd $(srcdir) && git rev-parse --show-toplevel)\"" 	>> $@
-	@echo "#define VPP_BUILD_VER \"$$($(srcdir)/scripts/version)\"" >> $@
 
 # Generate a plugin configuration script. Misconfiguring a
 # plugin can cause very subtle problems.
@@ -103,10 +114,6 @@ bin_vpp_LDADD = \
 bin_vpp_LDFLAGS = $(DPDK_LD_FLAGS)
 bin_vpp_LDADD += libvppinfra.la -lm -lpthread -ldl $(DPDK_LD_ADD)
 
-if WITH_IPV6SR
-  bin_vpp_LDADD += -lcrypto
-endif
-
 noinst_PROGRAMS += bin/test_client
 
 bin_test_client_SOURCES = \