[dpdk-dev] [PATCH v2 1/3] build: remove special versioning for non stable libraries

[David Marchand <david.marchand@redhat.com>]

Having a special versioning for experimental/internal libraries put a
additional maintenance cost while this status is already announced in
MAINTAINERS and the library headers/documentation.
Following discussions and vote at 05/20 TB meeting [1], use a single
versioning for all libraries in DPDK.

Note: for the ABI check, an exception [2] had been added when tweaking
this special versioning [3].
Prefer explicit libabigail rules (which will be dropped in 20.11).

1: https://mails.dpdk.org/archives/dev/2020-May/168450.html
2: https://git.dpdk.org/dpdk/commit/?id=23d7ad5db41c
3: https://git.dpdk.org/dpdk/commit/?id=ec2b8cd7ed69

Signed-off-by: David Marchand <david.marchand@redhat.com>
---
Changes since v1:
- removed mention of special handling in ABI docs,

---
 buildtools/meson.build                     |  3 ---
 config/meson.build                         | 16 ++++++--------
 devtools/check-abi.sh                      |  5 -----
 devtools/libabigail.abignore               | 25 ++++++++++++++++++++--
 doc/guides/contributing/abi_policy.rst     |  6 +-----
 doc/guides/contributing/abi_versioning.rst |  3 +--
 drivers/meson.build                        | 17 +--------------
 lib/meson.build                            | 16 +-------------
 mk/rte.lib.mk                              |  5 -----
 9 files changed, 33 insertions(+), 63 deletions(-)

diff --git a/buildtools/meson.build b/buildtools/meson.build
index d5f8291beb..79703b6f93 100644
--- a/buildtools/meson.build
+++ b/buildtools/meson.build
@@ -18,6 +18,3 @@ else
 endif
 map_to_def_cmd = py3 + files('map_to_def.py')
 sphinx_wrapper = py3 + files('call-sphinx-build.py')
-
-# stable ABI always starts with "DPDK_"
-is_stable_cmd = [find_program('grep', 'findstr'), '^DPDK_']
diff --git a/config/meson.build b/config/meson.build
index 351e268c1f..d6d3f5271d 100644
--- a/config/meson.build
+++ b/config/meson.build
@@ -25,18 +25,14 @@ major_version = '@0@.@1@'.format(pver.get(0), pver.get(1))
 abi_version = run_command(find_program('cat', 'more'),
 	abi_version_file).stdout().strip()
 
-# Regular libraries have the abi_version as the filename extension
+# Libraries have the abi_version as the filename extension
 # and have the soname be all but the final part of the abi_version.
-# Experimental libraries have soname with '0.major'
-# and the filename suffix as 0.majorminor versions,
-# e.g. v20.1 => librte_stable.so.20.1, librte_experimental.so.0.201
-#    sonames => librte_stable.so.20, librte_experimental.so.0.20
-# e.g. v20.0.1 => librte_stable.so.20.0.1, librte_experimental.so.0.2001
-#      sonames => librte_stable.so.20.0, librte_experimental.so.0.200
+# e.g. v20.1 => librte_foo.so.20.1
+#    sonames => librte_foo.so.20
+# e.g. v20.0.1 => librte_foo.so.20.0.1
+#      sonames => librte_foo.so.20.0
 abi_va = abi_version.split('.')
-stable_so_version = abi_va.length() == 2 ? abi_va[0] : abi_va[0] + '.' + abi_va[1]
-experimental_abi_version = '0.' + abi_va[0] + abi_va[1] + '.' + abi_va[2]
-experimental_so_version = experimental_abi_version
+so_version = abi_va.length() == 2 ? abi_va[0] : abi_va[0] + '.' + abi_va[1]
 
 # extract all version information into the build configuration
 dpdk_conf.set('RTE_VER_YEAR', pver.get(0).to_int())
diff --git a/devtools/check-abi.sh b/devtools/check-abi.sh
index dd9120e69e..e17fedbd9f 100755
--- a/devtools/check-abi.sh
+++ b/devtools/check-abi.sh
@@ -44,11 +44,6 @@ for dump in $(find $refdir -name "*.dump"); do
 		echo "Skipped glue library $name."
 		continue
 	fi
-	# skip experimental libraries, with a sover starting with 0.
-	if grep -qE "\<soname='[^']*\.so\.0\.[^']*'" $dump; then
-		echo "Skipped experimental library $name."
-		continue
-	fi
 	dump2=$(find $newdir -name $name)
 	if [ -z "$dump2" ] || [ ! -e "$dump2" ]; then
 		echo "Error: can't find $name in $newdir"
diff --git a/devtools/libabigail.abignore b/devtools/libabigail.abignore
index becbf842a5..97899b926e 100644
--- a/devtools/libabigail.abignore
+++ b/devtools/libabigail.abignore
@@ -50,9 +50,9 @@
         name = rte_crypto_aead_algorithm_strings
 
 ;;;;;;;;;;;;;;;;;;;;;;
-; Temporary exceptions for new __rte_internal marking till DPDK 20.11
+; Temporary exceptions till DPDK 20.11
 ;;;;;;;;;;;;;;;;;;;;;;
-; Ignore moving OCTEONTX2 stable functions to INTERNAL tag
+; Ignore moving OCTEONTX2 stable functions to INTERNAL
 [suppress_file]
 	file_name_regexp = ^librte_common_octeontx2\.
 [suppress_file]
@@ -77,3 +77,24 @@
         name = rte_dpaa2_mbuf_alloc_bulk
 [suppress_function]
         name_regexp = ^dpaa2?_.*tach$
+; Ignore soname changes for experimental libraries
+[suppress_file]
+	file_name_regexp = ^librte_bbdev\.
+[suppress_file]
+	file_name_regexp = ^librte_bpf\.
+[suppress_file]
+	file_name_regexp = ^librte_compressdev\.
+[suppress_file]
+	file_name_regexp = ^librte_fib\.
+[suppress_file]
+	file_name_regexp = ^librte_flow_classify\.
+[suppress_file]
+	file_name_regexp = ^librte_ipsec\.
+[suppress_file]
+	file_name_regexp = ^librte_rcu\.
+[suppress_file]
+	file_name_regexp = ^librte_rib\.
+[suppress_file]
+	file_name_regexp = ^librte_telemetry\.
+[suppress_file]
+	file_name_regexp = ^librte_stack\.
diff --git a/doc/guides/contributing/abi_policy.rst b/doc/guides/contributing/abi_policy.rst
index ee17ccb200..1b2fa27865 100644
--- a/doc/guides/contributing/abi_policy.rst
+++ b/doc/guides/contributing/abi_policy.rst
@@ -28,7 +28,6 @@ General Guidelines
    once approved these will form part of the next ABI version.
 #. Libraries or APIs marked as :ref:`experimental <experimental_apis>` may
    change without constraint, as they are not considered part of an ABI version.
-   Experimental libraries have the major ABI version ``0``.
 #. Updates to the :ref:`minimum hardware requirements <hw_rqmts>`, which drop
    support for hardware which was previously supported, should be treated as an
    ABI change.
@@ -331,7 +330,4 @@ Libraries
 ~~~~~~~~~
 
 Libraries marked as ``experimental`` are entirely not considered part of an ABI
-version, and may change without warning at any time. Experimental libraries
-always have a major ABI version of ``0`` to indicate they exist outside of
-:ref:`abi_versioning` , with the minor version incremented with each ABI change
-to library.
+version, and may change without warning at any time.
diff --git a/doc/guides/contributing/abi_versioning.rst b/doc/guides/contributing/abi_versioning.rst
index e96fde340f..31a9205572 100644
--- a/doc/guides/contributing/abi_versioning.rst
+++ b/doc/guides/contributing/abi_versioning.rst
@@ -112,8 +112,7 @@ how this may be done.
 
 At the same time, the major ABI version is changed atomically across all
 libraries by incrementing the major version in the ABI_VERSION file. This is
-done globally for all libraries that declare a stable ABI. For libraries marked
-as EXPERIMENTAL, their major ABI version is always set to 0.
+done globally for all libraries.
 
 Minor ABI versions
 ~~~~~~~~~~~~~~~~~~
diff --git a/drivers/meson.build b/drivers/meson.build
index cfb6a833c9..d1b59a4bac 100644
--- a/drivers/meson.build
+++ b/drivers/meson.build
@@ -124,21 +124,6 @@ foreach class:dpdk_driver_classes
 					output: out_filename,
 					depends: [pmdinfogen, tmp_lib])
 
-			version_map = '@0@/@1@/@2@_version.map'.format(
-					meson.current_source_dir(),
-					drv_path, lib_name)
-
-			is_stable = run_command(is_stable_cmd,
-				files(version_map)).returncode() == 0
-
-			if is_stable
-				lib_version = abi_version
-				so_version = stable_so_version
-			else
-				lib_version = experimental_abi_version
-				so_version = experimental_so_version
-			endif
-
 			# now build the static driver
 			static_lib = static_library(lib_name,
 				sources,
@@ -183,7 +168,7 @@ foreach class:dpdk_driver_classes
 				c_args: cflags,
 				link_args: lk_args,
 				link_depends: lk_deps,
-				version: lib_version,
+				version: abi_version,
 				soversion: so_version,
 				install: true,
 				install_dir: driver_install_path)
diff --git a/lib/meson.build b/lib/meson.build
index d190d84eff..d646f33e07 100644
--- a/lib/meson.build
+++ b/lib/meson.build
@@ -107,20 +107,6 @@ foreach l:libraries
 				cflags += '-DRTE_USE_FUNCTION_VERSIONING'
 			endif
 
-			version_map = '@0@/@1@/rte_@2@_version.map'.format(
-					meson.current_source_dir(), dir_name, name)
-
-			is_stable = run_command(is_stable_cmd,
-					files(version_map)).returncode() == 0
-
-			if is_stable
-				lib_version = abi_version
-				so_version = stable_so_version
-			else
-				lib_version = experimental_abi_version
-				so_version = experimental_so_version
-			endif
-
 			# first build static lib
 			static_lib = static_library(libname,
 					sources,
@@ -179,7 +165,7 @@ foreach l:libraries
 					include_directories: includes,
 					link_args: lk_args,
 					link_depends: lk_deps,
-					version: lib_version,
+					version: abi_version,
 					soversion: so_version,
 					install: true)
 			shared_dep = declare_dependency(link_with: shared_lib,
diff --git a/mk/rte.lib.mk b/mk/rte.lib.mk
index 682b590dba..229ae16814 100644
--- a/mk/rte.lib.mk
+++ b/mk/rte.lib.mk
@@ -13,11 +13,6 @@ VPATH += $(SRCDIR)
 
 LIBABIVER ?= $(shell cat $(RTE_SRCDIR)/ABI_VERSION)
 SOVER := $(basename $(LIBABIVER))
-ifeq ($(shell grep -s "^DPDK_" $(SRCDIR)/$(EXPORT_MAP)),)
-# EXPERIMENTAL ABI is versioned as 0.major+minor, e.g. 0.201 for 20.1 ABI
-LIBABIVER := 0.$(shell echo $(LIBABIVER) | awk 'BEGIN { FS="." }; { print $$1$$2"."$$3 }')
-SOVER := $(LIBABIVER)
-endif
 
 ifeq ($(CONFIG_RTE_BUILD_SHARED_LIB),y)
 SONAME := $(patsubst %.a,%.so.$(SOVER),$(LIB))
-- 
2.23.0