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From: Juraj Linkeš <juraj.linkes@pantheon.tech>
To: thomas@monjalon.net, bruce.richardson@intel.com,
	Honnappa.Nagarahalli@arm.com
Cc: dev@dpdk.org, Juraj Linkeš <juraj.linkes@pantheon.tech>
Subject: [dpdk-dev] [PATCH v2] build: alias default build as generic
Date: Tue, 24 Nov 2020 08:52:56 +0100
Message-ID: <1606204376-8236-1-git-send-email-juraj.linkes@pantheon.tech> (raw)
In-Reply-To: <1605875226-31161-1-git-send-email-juraj.linkes@pantheon.tech>

The current machine='default' build name is not descriptive. The actual
default build is machine='native'. Add an alternative string which does
the same build and better describes what we're building:
machine='generic'. Leave machine='default' for backwards compatibility.

Signed-off-by: Juraj Linkeš <juraj.linkes@pantheon.tech>
Reviewed-by: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>
---
 config/arm/meson.build                    |  5 +++--
 config/meson.build                        | 13 +++++++------
 devtools/test-meson-builds.sh             | 12 ++++++------
 doc/guides/prog_guide/build-sdk-meson.rst |  4 ++--
 meson_options.txt                         |  2 +-
 5 files changed, 19 insertions(+), 17 deletions(-)

diff --git a/config/arm/meson.build b/config/arm/meson.build
index 42b4e43c7..d4066ade8 100644
--- a/config/arm/meson.build
+++ b/config/arm/meson.build
@@ -1,12 +1,13 @@
 # SPDX-License-Identifier: BSD-3-Clause
 # Copyright(c) 2017 Intel Corporation.
 # Copyright(c) 2017 Cavium, Inc
+# Copyright(c) 2020 PANTHEON.tech s.r.o.
 
 # for checking defines we need to use the correct compiler flags
 march_opt = '-march=@0@'.format(machine)
 
 arm_force_native_march = false
-arm_force_default_march = (machine == 'default')
+arm_force_generic_march = (machine == 'generic')
 
 flags_common_default = [
 	# Accelarate rte_memcpy. Be sure to run unit test (memcpy_perf_autotest)
@@ -148,7 +149,7 @@ else
 	cmd_generic = ['generic', '', '', 'default', '']
 	cmd_output = cmd_generic # Set generic by default
 	machine_args = [] # Clear previous machine args
-	if arm_force_default_march and not meson.is_cross_build()
+	if arm_force_generic_march and not meson.is_cross_build()
 		machine = impl_generic
 		impl_pn = 'default'
 	elif not meson.is_cross_build()
diff --git a/config/meson.build b/config/meson.build
index a29693b88..3db2f55e0 100644
--- a/config/meson.build
+++ b/config/meson.build
@@ -70,21 +70,22 @@ else
 	machine = get_option('machine')
 endif
 
-# machine type 'default' is special, it defaults to the per arch agreed common
-# minimal baseline needed for DPDK.
+# machine type 'generic' is special, it selects the per arch agreed common
+# minimal baseline needed for DPDK. Machine type 'default' is also supported
+# with the same meaning for backwards compatibility.
 # That might not be the most optimized, but the most portable version while
 # still being able to support the CPU features required for DPDK.
 # This can be bumped up by the DPDK project, but it can never be an
 # invariant like 'native'
-if machine == 'default'
+if machine == 'default' or machine == 'generic'
 	if host_machine.cpu_family().startswith('x86')
-		# matches the old pre-meson build systems default
+		# matches the old pre-meson build systems generic machine
 		machine = 'corei7'
 	elif host_machine.cpu_family().startswith('arm')
 		machine = 'armv7-a'
 	elif host_machine.cpu_family().startswith('aarch')
-		# arm64 manages defaults in config/arm/meson.build
-		machine = 'default'
+		# arm64 manages generic config in config/arm/meson.build
+		machine = 'generic'
 	elif host_machine.cpu_family().startswith('ppc')
 		machine = 'power8'
 	endif
diff --git a/devtools/test-meson-builds.sh b/devtools/test-meson-builds.sh
index 3ce49368c..11aa9bf11 100755
--- a/devtools/test-meson-builds.sh
+++ b/devtools/test-meson-builds.sh
@@ -209,11 +209,11 @@ done
 # test compilation with minimal x86 instruction set
 # Set the install path for libraries to "lib" explicitly to prevent problems
 # with pkg-config prefixes if installed in "lib/x86_64-linux-gnu" later.
-default_machine='nehalem'
-if ! check_cc_flags "-march=$default_machine" ; then
-	default_machine='corei7'
+generic_machine='nehalem'
+if ! check_cc_flags "-march=$generic_machine" ; then
+	generic_machine='corei7'
 fi
-build build-x86-default cc -Dlibdir=lib -Dmachine=$default_machine $use_shared
+build build-x86-generic cc -Dlibdir=lib -Dmachine=$generic_machine $use_shared
 
 # 32-bit with default compiler
 if check_cc_flags '-m32' ; then
@@ -253,10 +253,10 @@ for f in $srcdir/config/ppc/ppc* ; do
 	build build-$(basename $f | cut -d'-' -f-2) $f $use_shared
 done
 
-# Test installation of the x86-default target, to be used for checking
+# Test installation of the x86-generic target, to be used for checking
 # the sample apps build using the pkg-config file for cflags and libs
 load_env cc
-build_path=$(readlink -f $builds_dir/build-x86-default)
+build_path=$(readlink -f $builds_dir/build-x86-generic)
 export DESTDIR=$build_path/install
 # No need to reinstall if ABI checks are enabled
 if [ -z "$DPDK_ABI_REF_VERSION" ]; then
diff --git a/doc/guides/prog_guide/build-sdk-meson.rst b/doc/guides/prog_guide/build-sdk-meson.rst
index 3429e2647..c7e12eedf 100644
--- a/doc/guides/prog_guide/build-sdk-meson.rst
+++ b/doc/guides/prog_guide/build-sdk-meson.rst
@@ -85,7 +85,7 @@ Project-specific options are passed used -Doption=value::
 
 	meson -Denable_docs=true fullbuild  # build and install docs
 
-	meson -Dmachine=default  # use builder-independent baseline -march
+	meson -Dmachine=generic  # use builder-independent baseline -march
 
 	meson -Ddisable_drivers=event/*,net/tap  # disable tap driver and all
 					# eventdev PMDs for a smaller build
@@ -114,7 +114,7 @@ Examples of setting some of the same options using meson configure::
         re-scan from meson.
 
 .. note::
-        machine=default uses a config that works on all supported architectures
+        machine=generic uses a config that works on all supported architectures
         regardless of the capabilities of the machine where the build is happening.
 
 As well as those settings taken from ``meson configure``, other options
diff --git a/meson_options.txt b/meson_options.txt
index e384e6dbb..ebd28d8b8 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -21,7 +21,7 @@ option('kernel_dir', type: 'string', value: '',
 option('lib_musdk_dir', type: 'string', value: '',
 	description: 'path to the MUSDK library installation directory')
 option('machine', type: 'string', value: 'native',
-	description: 'set the target machine type')
+	description: 'set the target machine type. Special values: "generic" is a build usable on all machines of the build machine architecture, "native" lets the compiler pick the architecture of the build machine.')
 option('max_ethports', type: 'integer', value: 32,
 	description: 'maximum number of Ethernet devices')
 option('max_lcores', type: 'integer', value: 128,
-- 
2.20.1


  reply	other threads:[~2020-11-24  7:53 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-20 12:27 [dpdk-dev] [PATCH v1 1/1] " Juraj Linkeš
2020-11-24  7:52 ` Juraj Linkeš [this message]
2020-11-24  9:30   ` [dpdk-dev] [PATCH v2] " Bruce Richardson
2020-12-23 10:18     ` Juraj Linkeš
2021-02-18 14:12   ` [dpdk-dev] [PATCH v3] " Juraj Linkeš
2021-03-09  8:43     ` Juraj Linkeš
2021-03-29 10:49     ` [dpdk-dev] [PATCH v4] " Juraj Linkeš
2021-03-30  6:40       ` [dpdk-dev] [PATCH v5] " Juraj Linkeš
2021-04-10  7:58         ` Thomas Monjalon

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