[dpdk-dev] [PATCH] mk: --no-as-needed by default for linux exec-env

[Gonzalez Monroy, Sergio]

Some info about the issue for this patch:
https://wiki.ubuntu.com/ToolChain/CompilerFlags#Flags_passed_to_the_linker
https://wiki.debian.org/ToolChain/DSOLinking#Only_link_with_needed_libraries

Basically, Ubuntu GCC is always passing --as-needed to the linker which causes some
Linking issues for us.
I'm not entirely sure that we should patch this issue or just add to the release notes.
Currently we can work around this by setting EXTRA_LDFLAGS='--no-as-needed' 

Thoughts?

Thanks,
Sergio

> -----Original Message-----
> From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Sergio Gonzalez
> Monroy
> Sent: Thursday, October 30, 2014 10:58 AM
> To: dev at dpdk.org
> Subject: [dpdk-dev] [PATCH] mk: --no-as-needed by default for linux exec-
> env
> 
> Ubuntu/Debian toolchain passes --as-needed flag to the linker by default.
> Add --no-as-needed flag by default in linuxapp exec-env to ensure correct
> linking.
> 
> Signed-off-by: Sergio Gonzalez Monroy
> <sergio.gonzalez.monroy at intel.com>
> ---
>  mk/exec-env/linuxapp/rte.vars.mk | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/mk/exec-env/linuxapp/rte.vars.mk b/mk/exec-
> env/linuxapp/rte.vars.mk
> index d4808c2..79ddd5f 100644
> --- a/mk/exec-env/linuxapp/rte.vars.mk
> +++ b/mk/exec-env/linuxapp/rte.vars.mk
> @@ -45,7 +45,7 @@ else
>  EXECENV_CFLAGS  = -pthread
>  endif
> 
> -EXECENV_LDFLAGS =
> +EXECENV_LDFLAGS = --no-as-needed
>  EXECENV_LDLIBS  = -lrt -lm
>  EXECENV_ASFLAGS =
> 
> --
> 1.9.3