Re: [dpdk-dev] [PATCH 2/2] buildtools: fix build with coverage enabled

[Andrew Rybchenko <arybchenko@solarflare.com>]

On 11/25/19 11:10 AM, David Marchand wrote:
> A compiler can reuse a variable name and prefix it when instrumenting
> with coverage.
> 
> Example:
> $ make defconfig T=x86_64-native-linux-gcc O=master
> $ make EXTRA_CFLAGS='--coverage' O=master
> [...]
>     CC rte_flow.o
>  rte_flow_dynf_metadata_offs is not flagged as experimental but is listed
>  in version map
>  Please add __rte_experimental to the definition of
>  rte_flow_dynf_metadata_offs
> 
> $ objdump -t master/build/lib/librte_ethdev/rte_flow.o |grep _offs$
> 0000000000000000 l     F .text.startup	000000000000000a
>   _GLOBAL__sub_I_65535_0_rte_flow_dynf_metadata_offs
> 0000000000000620 g     O .data	0000000000000004
>   rte_flow_dynf_metadata_offs
> 
> Protect against this by adding a space character in the pattern.
> 
> Fixes: a4bcd61de82d ("buildtools: add script to check experimental API exports")
> Cc: stable@dpdk.org
> 
> Reported-by: Andrew Rybchenko <arybchenko@solarflare.com>
> Signed-off-by: David Marchand <david.marchand@redhat.com>

David,

thanks a lot, it solves build problem.

It does not solve experimental symbol inconsistency problem in
markup and map file, but it is a separate less critical
problem.

Tested-by: Andrew Rybchenko <arybchenko@solarflare.com>