[dpdk-dev] [PATCH v2] build: avoid --as-needed as it causes overlinking
bruce.richardson at intel.com
Thu Aug 29 17:34:32 CEST 2019
On Thu, Aug 29, 2019 at 05:30:03PM +0200, Christian Ehrhardt wrote:
> A while ago telemetry was added in 57ae0ec6 and it also added as-needed
> to config/meson.build. This seems no more needed these days as due to other
> build changes the ordering in buildlogs is:
> [...] -lrte_telemetry [...] -Wl,--no-as-needed [...]
> Which means telemetry no more benefits from --no-as-needed anyway.
> Overlinking problems get triggered by the meson generated pkgconfig which
> will have:
> [...] -Wl,--no-as-needed <somelibsusedbydpdk>
> This will overlink <somelibs> and in addition anything that follows
> as it also doesn't wrap back to --as-needed. So if a projects includes
> dpdk libs + <other> it will also consider <other> with --no-as-needed.
> Fixes: https://bugs.launchpad.net/ubuntu/+source/dpdk/+bug/1841759
> Signed-off-by: Christian Ehrhardt <christian.ehrhardt at canonical.com>
> Acked-by: Luca Boccassi <bluca at debian.org>
> config/meson.build | 1 -
> 1 file changed, 1 deletion(-)
> diff --git a/config/meson.build b/config/meson.build
> index 2bafea530..a27f731f8 100644
> --- a/config/meson.build
> +++ b/config/meson.build
> @@ -94,7 +94,6 @@ dpdk_conf.set('RTE_TOOLCHAIN_' + toolchain.to_upper(), 1)
> dpdk_conf.set('RTE_ARCH_64', cc.sizeof('void *') == 8)
> add_project_link_arguments('-Wl,--no-as-needed', language: 'c')
> -dpdk_extra_ldflags += '-Wl,--no-as-needed'
This seems strange to me. What is it about linking the dpdk apps that
require the argument, but makes it safe for non-builtin apps to avoid
having the arg?
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