[dpdk-dev] [PATCH v2 3/3] build: bump minimum Meson to 0.47.1 and use dependency() for libbsd

[Luca Boccassi]

Move libbsd inclusion to librte_eal, so that all other libraries and
PMDs will inherit it, and librte_cmdline which is built before
librte_eal.
Bump Meson dependency to 0.47.1, to avoid bug where the linker flag of
the dependency gets replicated again and again.

Signed-off-by: Luca Boccassi <bluca at debian.org>
---
v2: bump meson minimum version to 0.47.1 to avoid meson bug, and move
    libbsd dependency to eal and cmdline

 config/meson.build             | 10 +++++-----
 lib/librte_cmdline/meson.build |  4 ++++
 lib/librte_eal/meson.build     |  3 +++
 meson.build                    |  2 +-
 4 files changed, 13 insertions(+), 6 deletions(-)

diff --git a/config/meson.build b/config/meson.build
index db32499b3..e1af468ee 100644
--- a/config/meson.build
+++ b/config/meson.build
@@ -74,11 +74,11 @@ if numa_dep.found() and cc.has_header('numaif.h')
 endif
 
 # check for strlcpy
-if host_machine.system() == 'linux' and cc.find_library('bsd',
-		required: false).found() and cc.has_header('bsd/string.h')
-	dpdk_conf.set('RTE_USE_LIBBSD', 1)
-	add_project_link_arguments('-lbsd', language: 'c')
-	dpdk_extra_ldflags += '-lbsd'
+if host_machine.system() == 'linux'
+	libbsd = dependency('libbsd', required: false)
+	if libbsd.found()
+		dpdk_conf.set('RTE_USE_LIBBSD', 1)
+	endif
 endif
 
 # add -include rte_config to cflags
diff --git a/lib/librte_cmdline/meson.build b/lib/librte_cmdline/meson.build
index 30498906c..be286d4a2 100644
--- a/lib/librte_cmdline/meson.build
+++ b/lib/librte_cmdline/meson.build
@@ -5,6 +5,10 @@
 includes = [global_inc]
 includes += include_directories('../librte_eal/common/include')
 
+if dpdk_conf.has('RTE_USE_LIBBSD')
+	ext_deps += libbsd
+endif
+
 version = 2
 sources = files('cmdline.c',
 	'cmdline_cirbuf.c',
diff --git a/lib/librte_eal/meson.build b/lib/librte_eal/meson.build
index a18f3a826..fa60736c9 100644
--- a/lib/librte_eal/meson.build
+++ b/lib/librte_eal/meson.build
@@ -25,6 +25,9 @@ version = 9  # the version of the EAL API
 allow_experimental_apis = true
 deps += 'compat'
 deps += 'kvargs'
+if dpdk_conf.has('RTE_USE_LIBBSD')
+	ext_deps += libbsd
+endif
 sources = common_sources + env_sources
 objs = common_objs + env_objs
 headers = common_headers + env_headers
diff --git a/meson.build b/meson.build
index 35126106a..4041eccb6 100644
--- a/meson.build
+++ b/meson.build
@@ -5,7 +5,7 @@ project('DPDK', 'C',
 	version: '19.02.0-rc1',
 	license: 'BSD',
 	default_options: ['buildtype=release', 'default_library=static'],
-	meson_version: '>= 0.42'
+	meson_version: '>= 0.47.1'
 )
 
 # set up some global vars for compiler, platform, configuration, etc.
-- 
2.20.1