[v7,2/5] build: use dependency() instead of find_library()
diff mbox series

Message ID 20190213115452.2264-2-bluca@debian.org
State Superseded, archived
Delegated to: Thomas Monjalon
Headers show
Series
  • [v7,1/5] build: bump minimum Meson version to 0.47.1
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Checks

Context Check Description
ci/checkpatch success coding style OK
ci/Intel-compilation success Compilation OK

Commit Message

Luca Boccassi Feb. 13, 2019, 11:54 a.m. UTC
Whenever possible (if the library ships a pkg-config file) use meson's
dependency() function to look for it, as it will automatically add it
to the Requires.private list if needed, to allow for static builds to
succeed for reverse dependencies of DPDK. Otherwise the recursive
dependencies are not parsed, and users doing static builds have to
resolve them manually by themselves.
When using this API avoid additional checks that are superfluous and
take extra time, and avoid adding the linker flag manually which causes
it to be duplicated.

Signed-off-by: Luca Boccassi <bluca@debian.org>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>
---
v2: split libbsd change in a separate commit, remove CC to stable
    as a meson bump will be required
v4: update comment in drivers/meson.build to clarify role of
    pkgconfig_extra_libs
v5: remove -lz from drivers/compress/zlib
v7: remove change from pcap pmd, as it's causing issues with
    cross-compilation due to missing pkg-config file

 drivers/compress/zlib/meson.build  | 1 -
 drivers/crypto/ccp/meson.build     | 1 -
 drivers/crypto/openssl/meson.build | 1 -
 drivers/crypto/qat/meson.build     | 1 -
 drivers/meson.build                | 9 +++++----
 drivers/net/bnx2x/meson.build      | 2 +-
 drivers/net/mlx4/meson.build       | 6 +++---
 drivers/net/mlx5/meson.build       | 6 +++---
 lib/librte_bpf/meson.build         | 4 ++--
 lib/librte_telemetry/meson.build   | 2 +-
 10 files changed, 15 insertions(+), 18 deletions(-)

Comments

Bruce Richardson Feb. 13, 2019, 3:35 p.m. UTC | #1
On Wed, Feb 13, 2019 at 11:54:49AM +0000, Luca Boccassi wrote:
> Whenever possible (if the library ships a pkg-config file) use meson's
> dependency() function to look for it, as it will automatically add it
> to the Requires.private list if needed, to allow for static builds to
> succeed for reverse dependencies of DPDK. Otherwise the recursive
> dependencies are not parsed, and users doing static builds have to
> resolve them manually by themselves.
> When using this API avoid additional checks that are superfluous and
> take extra time, and avoid adding the linker flag manually which causes
> it to be duplicated.
> 
> Signed-off-by: Luca Boccassi <bluca@debian.org>
> Acked-by: Bruce Richardson <bruce.richardson@intel.com>
> ---
> v2: split libbsd change in a separate commit, remove CC to stable
>     as a meson bump will be required
> v4: update comment in drivers/meson.build to clarify role of
>     pkgconfig_extra_libs
> v5: remove -lz from drivers/compress/zlib
> v7: remove change from pcap pmd, as it's causing issues with
>     cross-compilation due to missing pkg-config file
> 
I reproduced the compilation errors on cross compile with the older version
of this patch. Using this latest version I don't see them any more.

Tested-by: Bruce Richardson <bruce.richardson@intel.com>

Patch
diff mbox series

diff --git a/drivers/compress/zlib/meson.build b/drivers/compress/zlib/meson.build
index 7748de2df..b036703c7 100644
--- a/drivers/compress/zlib/meson.build
+++ b/drivers/compress/zlib/meson.build
@@ -9,6 +9,5 @@  endif
 deps += 'bus_vdev'
 sources = files('zlib_pmd.c', 'zlib_pmd_ops.c')
 ext_deps += dep
-pkgconfig_extra_libs += '-lz'
 
 allow_experimental_apis = true
diff --git a/drivers/crypto/ccp/meson.build b/drivers/crypto/ccp/meson.build
index e43b00591..915c4c854 100644
--- a/drivers/crypto/ccp/meson.build
+++ b/drivers/crypto/ccp/meson.build
@@ -18,4 +18,3 @@  sources = files('rte_ccp_pmd.c',
 		'ccp_pmd_ops.c')
 
 ext_deps += dep
-pkgconfig_extra_libs += '-lcrypto'
diff --git a/drivers/crypto/openssl/meson.build b/drivers/crypto/openssl/meson.build
index 77a6596d7..d56a32366 100644
--- a/drivers/crypto/openssl/meson.build
+++ b/drivers/crypto/openssl/meson.build
@@ -9,4 +9,3 @@  allow_experimental_apis = true
 deps += 'bus_vdev'
 sources = files('rte_openssl_pmd.c', 'rte_openssl_pmd_ops.c')
 ext_deps += dep
-pkgconfig_extra_libs += '-lcrypto'
diff --git a/drivers/crypto/qat/meson.build b/drivers/crypto/qat/meson.build
index 9cc98d2c2..21f969735 100644
--- a/drivers/crypto/qat/meson.build
+++ b/drivers/crypto/qat/meson.build
@@ -13,6 +13,5 @@  if dep.found()
 			     'qat_sym.c',
 			     'qat_sym_session.c')
 	qat_ext_deps += dep
-	pkgconfig_extra_libs += '-lcrypto'
 	qat_cflags += '-DBUILD_QAT_SYM'
 endif
diff --git a/drivers/meson.build b/drivers/meson.build
index e37d4fe2b..69d0556d3 100644
--- a/drivers/meson.build
+++ b/drivers/meson.build
@@ -46,10 +46,11 @@  foreach class:driver_classes
 		# set up internal deps. Drivers can append/override as necessary
 		deps = std_deps
 		# ext_deps: Stores external library dependency got
-		# using dependency() or cc.find_library(). For most cases, we
-		# probably also need to specify the "-l" flags in
-		# pkgconfig_extra_libs variable too, so that it can be reflected
-		# in the pkgconfig output for static builds
+		# using dependency() (preferred) or find_library().
+		# For the find_library() case (but not with dependency()) we also
+		# need to specify the "-l" flags in pkgconfig_extra_libs variable
+		# too, so that it can be reflected in the pkgconfig output for
+		# static builds.
 		ext_deps = []
 		pkgconfig_extra_libs = []
 
diff --git a/drivers/net/bnx2x/meson.build b/drivers/net/bnx2x/meson.build
index e3c688869..dd189ffc4 100644
--- a/drivers/net/bnx2x/meson.build
+++ b/drivers/net/bnx2x/meson.build
@@ -1,7 +1,7 @@ 
 # SPDX-License-Identifier: BSD-3-Clause
 # Copyright(c) 2018 Intel Corporation
 
-dep = cc.find_library('z', required: false)
+dep = dependency('zlib', required: false)
 build = dep.found()
 ext_deps += dep
 cflags += '-DZLIB_CONST'
diff --git a/drivers/net/mlx4/meson.build b/drivers/net/mlx4/meson.build
index 4bccd68e0..b4f9672e7 100644
--- a/drivers/net/mlx4/meson.build
+++ b/drivers/net/mlx4/meson.build
@@ -14,9 +14,9 @@  if pmd_dlopen
 	]
 endif
 libs = [
-	cc.find_library('mnl', required:false),
-	cc.find_library('mlx4', required:false),
-	cc.find_library('ibverbs', required:false),
+	dependency('libmnl', required:false),
+	dependency('libmlx4', required:false),
+	dependency('libibverbs', required:false),
 ]
 build = true
 foreach lib:libs
diff --git a/drivers/net/mlx5/meson.build b/drivers/net/mlx5/meson.build
index 4540c455b..0cf2f0873 100644
--- a/drivers/net/mlx5/meson.build
+++ b/drivers/net/mlx5/meson.build
@@ -14,9 +14,9 @@  if pmd_dlopen
 	]
 endif
 libs = [
-	cc.find_library('mnl', required:false),
-	cc.find_library('mlx5', required:false),
-	cc.find_library('ibverbs', required:false),
+	dependency('libmnl', required:false),
+	dependency('libmlx5', required:false),
+	dependency('libibverbs', required:false),
 ]
 build = true
 foreach lib:libs
diff --git a/lib/librte_bpf/meson.build b/lib/librte_bpf/meson.build
index bc0cd78f9..c3b1f698e 100644
--- a/lib/librte_bpf/meson.build
+++ b/lib/librte_bpf/meson.build
@@ -18,8 +18,8 @@  install_headers = files('bpf_def.h',
 
 deps += ['mbuf', 'net', 'ethdev']
 
-dep = cc.find_library('elf', required: false)
-if dep.found() == true and cc.has_header('libelf.h', dependencies: dep)
+dep = dependency('libelf', required: false)
+if dep.found()
 	sources += files('bpf_load_elf.c')
 	ext_deps += dep
 endif
diff --git a/lib/librte_telemetry/meson.build b/lib/librte_telemetry/meson.build
index 9492f544e..cafb26f08 100644
--- a/lib/librte_telemetry/meson.build
+++ b/lib/librte_telemetry/meson.build
@@ -6,7 +6,7 @@  headers = files('rte_telemetry.h', 'rte_telemetry_internal.h', 'rte_telemetry_pa
 deps += ['metrics', 'ethdev']
 cflags += '-DALLOW_EXPERIMENTAL_API'
 
-jansson = cc.find_library('jansson', required: false)
+jansson = dependency('jansson', required: false)
 if jansson.found()
 	ext_deps += jansson
 	dpdk_app_link_libraries += ['telemetry']