Re: [dpdk-dev] Issue with rte_compat versioning macros

["Gajdzica, MaciejX T" <maciejx.t.gajdzica@intel.com>]

> -----Original Message-----
> From: Thomas Monjalon [mailto:thomas.monjalon@6wind.com]
> Sent: Friday, June 19, 2015 4:48 PM
> To: Gajdzica, MaciejX T
> Cc: dev@dpdk.org; nhorman@tuxdriver.com
> Subject: Re: [dpdk-dev] Issue with rte_compat versioning macros
> 
> 2015-06-19 14:38, Gajdzica, MaciejX T:
> > There is an issue with macros in rte_compat.h. For shared library 
> > case, macro BIND_DEFAULT_SYMBOL takes three arguments and for other 
> > case it takes only two arguments. Also letters for macro variable 
> > names are
> not consistent in these two cases.
> 
> Yes, and your patch fix it:
> 	http://dpdk.org/dev/patchwork/patch/5475/
> But it is part of a series which is not accepted yet.
> 
> It would be faster merged if you send it as a standalone patch.
> Thanks

But simple solution with adding third argument to static library case doesn't work. Comment in rte_compat.h file describes steps needed to add new version of the function and it says:

* 2) rename the existing function int foo(char *string) to
* 	int __vsym foo_v20(char *string)
*
* 3) Add this macro immediately below the function
* 	VERSION_SYMBOL(foo, _v20, 2.0);
*
* 4) Implement a new version of foo.
* 	char foo(int value, int otherval) { ...}
*
* 5) Mark the newest version as the default version
* 	BIND_DEFAULT_SYMBOL(foo, 2.1);

So probably BIND_DEFAULT_SYMBOL macro for shared library case needs to be modified to have two arguments.
I'm not familiar with that symver syntax so I need some help. It would be better when original author say how it should look like.

Best Regards
Maciek