build: introduce deprecated libraries

Add support for a list of deprecated libs to the lib/meson.build file.
This will be used to mark libraries that are planned to be removed from
DPDK. The first user of this will be KNI in a next patch.

Deprecated libraries should still be tested in the CI, so update our
build testing and CI scripts.

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
Signed-off-by: David Marchand <david.marchand@redhat.com>

.ci/linux-build.sh

@@ -107,6 +107,8 @@ OPTS="$OPTS -Dcheck_includes=true"
 if [ "$MINI" = "true" ]; then
     OPTS="$OPTS -Denable_drivers=net/null"
     OPTS="$OPTS -Ddisable_libs=*"
+else
+    OPTS="$OPTS -Ddisable_libs="
 fi
 
 if [ "$ASAN" = "true" ]; then

devtools/test-meson-builds.sh

@@ -109,6 +109,11 @@ config () # <dir> <builddir> <meson options>
 		return
 	fi
 	options=
+	# deprecated libs may be disabled by default, so for complete builds ensure
+	# no libs are disabled
+	if ! echo $* | grep -q -- 'disable_libs' ; then
+		options="$options -Ddisable_libs="
+	fi
 	if echo $* | grep -qw -- '--default-library=shared' ; then
 		options="$options -Dexamples=all"
 	else

drivers/meson.build

@@ -139,6 +139,9 @@ foreach subpath:subdirs
                 if not is_variable('shared_rte_' + d)
                     build = false
                     reason = 'missing internal dependency, "@0@"'.format(d)
+                    if dpdk_libs_deprecated.contains(d)
+                        reason += ' (deprecated lib)'
+                    endif
                     message('Disabling @1@ [@2@]: missing internal dependency "@0@"'
                             .format(d, name, 'drivers/' + drv_path))
                 else

lib/meson.build

@@ -136,7 +136,13 @@ foreach l:libraries
     if disabled_libs.contains(l)
         build = false
         reason = 'explicitly disabled via build config'
+        if dpdk_libs_deprecated.contains(l)
+            reason += ' (deprecated lib)'
+        endif
     else
+        if dpdk_libs_deprecated.contains(l)
+            warning('Enabling deprecated library, "@0@"'.format(l))
+        endif
         subdir(l)
     endif
     if name != l
@@ -152,6 +158,9 @@ foreach l:libraries
         if not is_variable('shared_rte_' + d)
             build = false
             reason = 'missing internal dependency, "@0@"'.format(d)
+            if dpdk_libs_deprecated.contains(d)
+                reason += ' (deprecated lib)'
+            endif
             message('Disabling @1@ [@2@]: missing internal dependency "@0@"'
                     .format(d, name, 'lib/' + l))
         else

meson.build

@@ -40,6 +40,7 @@ dpdk_chkinc_headers = []
 dpdk_driver_classes = []
 dpdk_drivers = []
 dpdk_extra_ldflags = []
+dpdk_libs_deprecated = []
 dpdk_libs_disabled = []
 dpdk_drvs_disabled = []
 testpmd_drivers_sources = []