diff mbox series

[v3] build: fix plugin load on static builds

Message ID 20201218131422.15131-1-olivier.matz@6wind.com (mailing list archive)
State Accepted, archived
Delegated to: Thomas Monjalon
Headers show
Series [v3] build: fix plugin load on static builds | expand

Checks

Context Check Description
ci/Intel-compilation success Compilation OK
ci/iol-testing success Testing PASS
ci/iol-abi-testing success Testing PASS
ci/iol-intel-Performance success Performance Testing PASS
ci/iol-intel-Functional success Functional Testing PASS
ci/iol-broadcom-Functional success Functional Testing PASS
ci/iol-broadcom-Performance success Performance Testing PASS
ci/checkpatch success coding style OK

Commit Message

Olivier Matz Dec. 18, 2020, 1:14 p.m. UTC
When dpdk is compiled as static libraries, it is not possible
to load a plugin from an application. We get the following error:

  EAL: librte_pmd_xxxx.so: undefined symbol: per_lcore__rte_errno

This happens because the dpdk symbols are not exported. Add them to the
dynamic symbol table by using '-Wl,--export-dynamic'. This option was
previously present when compiled with Makefiles, it was introduced in
commit f9a08f650211 ("eal: add support for shared object drivers")

Also add it to the pkg-config file.

Fixes: 16ade738fd0d ("app/testpmd: build with meson")
Fixes: 89f0711f9ddf ("examples: build some samples with meson")
Cc: stable@dpdk.org

Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
---

v2
* only set examples/applications flags if build is static

v3
* add missing pkg-config part in previous version

 app/meson.build                   | 6 ++++++
 buildtools/pkg-config/meson.build | 2 +-
 examples/meson.build              | 7 ++++++-
 3 files changed, 13 insertions(+), 2 deletions(-)

Comments

Bruce Richardson Dec. 21, 2020, 11:04 a.m. UTC | #1
On Fri, Dec 18, 2020 at 02:14:22PM +0100, Olivier Matz wrote:
> When dpdk is compiled as static libraries, it is not possible
> to load a plugin from an application. We get the following error:
> 
>   EAL: librte_pmd_xxxx.so: undefined symbol: per_lcore__rte_errno
> 
> This happens because the dpdk symbols are not exported. Add them to the
> dynamic symbol table by using '-Wl,--export-dynamic'. This option was
> previously present when compiled with Makefiles, it was introduced in
> commit f9a08f650211 ("eal: add support for shared object drivers")
> 
> Also add it to the pkg-config file.
> 
> Fixes: 16ade738fd0d ("app/testpmd: build with meson")
> Fixes: 89f0711f9ddf ("examples: build some samples with meson")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
> ---
Reviewed-by: Bruce Richardson <bruce.richardson@intel.com>
Thomas Monjalon Jan. 5, 2021, 9:46 p.m. UTC | #2
21/12/2020 12:04, Bruce Richardson:
> On Fri, Dec 18, 2020 at 02:14:22PM +0100, Olivier Matz wrote:
> > When dpdk is compiled as static libraries, it is not possible
> > to load a plugin from an application. We get the following error:
> > 
> >   EAL: librte_pmd_xxxx.so: undefined symbol: per_lcore__rte_errno
> > 
> > This happens because the dpdk symbols are not exported. Add them to the
> > dynamic symbol table by using '-Wl,--export-dynamic'. This option was
> > previously present when compiled with Makefiles, it was introduced in
> > commit f9a08f650211 ("eal: add support for shared object drivers")
> > 
> > Also add it to the pkg-config file.
> > 
> > Fixes: 16ade738fd0d ("app/testpmd: build with meson")
> > Fixes: 89f0711f9ddf ("examples: build some samples with meson")
> > Cc: stable@dpdk.org
> > 
> > Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
> > ---
> Reviewed-by: Bruce Richardson <bruce.richardson@intel.com>

Applied, thanks
diff mbox series

Patch

diff --git a/app/meson.build b/app/meson.build
index eb74f215a3..fd72d7da68 100644
--- a/app/meson.build
+++ b/app/meson.build
@@ -25,6 +25,10 @@  apps = [
 lib_execinfo = cc.find_library('execinfo', required: false)
 
 default_cflags = machine_args + ['-DALLOW_EXPERIMENTAL_API']
+default_ldflags = []
+if get_option('default_library') == 'static'
+	default_ldflags += ['-Wl,--export-dynamic']
+endif
 
 foreach app:apps
 	build = true
@@ -32,6 +36,7 @@  foreach app:apps
 	sources = []
 	includes = []
 	cflags = default_cflags
+	ldflags = default_ldflags
 	objs = [] # other object files to link against, used e.g. for
 	          # instruction-set optimized versions of code
 
@@ -58,6 +63,7 @@  foreach app:apps
 		executable('dpdk-' + name,
 				sources,
 				c_args: cflags,
+				link_args: ldflags,
 				link_whole: link_libs,
 				dependencies: dep_objs,
 				install_rpath: join_paths(get_option('prefix'),
diff --git a/buildtools/pkg-config/meson.build b/buildtools/pkg-config/meson.build
index 5f19304289..168ee08e58 100644
--- a/buildtools/pkg-config/meson.build
+++ b/buildtools/pkg-config/meson.build
@@ -47,7 +47,7 @@  This is required for a number of static inline functions in the public headers.'
 	                  # if libbsd is not enabled, then this is blank
 	libraries_private: ['-Wl,--whole-archive'] +
 			dpdk_drivers + dpdk_static_libraries +
-			['-Wl,--no-whole-archive']
+			['-Wl,--no-whole-archive', '-Wl,--export-dynamic']
 )
 
 # For static linking with dependencies as shared libraries,
diff --git a/examples/meson.build b/examples/meson.build
index 46ec80919e..f643ec1bad 100644
--- a/examples/meson.build
+++ b/examples/meson.build
@@ -63,6 +63,10 @@  default_cflags = machine_args
 if cc.has_argument('-Wno-format-truncation')
 	default_cflags += '-Wno-format-truncation'
 endif
+default_ldflags = dpdk_extra_ldflags
+if get_option('default_library') == 'static'
+	default_ldflags += ['-Wl,--export-dynamic']
+endif
 
 foreach example: examples
 	name = example.split('/')[-1]
@@ -70,6 +74,7 @@  foreach example: examples
 	sources = []
 	allow_experimental_apis = false
 	cflags = default_cflags
+	ldflags = default_ldflags
 
 	ext_deps = [execinfo]
 	includes = [include_directories(example)]
@@ -91,7 +96,7 @@  foreach example: examples
 		executable('dpdk-' + name, sources,
 			include_directories: includes,
 			link_whole: link_whole_libs,
-			link_args: dpdk_extra_ldflags,
+			link_args: ldflags,
 			c_args: cflags,
 			dependencies: dep_objs)
 	elif not allow_skips