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: sta...@dpdk.org
Signed-off-by: Olivier Matz <olivier.m...@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(-)
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
--
2.25.1
