On Fri, Sep 01, 2017 at 03:30:21PM -0500, Chien Tin Tung wrote: > On Thu, Aug 24, 2017 at 04:56:01PM -0500, Jason Gunthorpe wrote: > > This causes the symbol table to look like: > > > > 208: 000000000000c000 142 FUNC GLOBAL DEFAULT 13 verbs_register_driver_15@@IBVERBS_PRIVATE_15 > > > > Which encodes the expected private ABI version inside the symbol name > > as well as with the symbol version. > > > > This ensures that the ABI version is checked even if the linking > > environment does not include symbol versions, for instance if an > > end user is linking a provider static library to the system dynamic > > libibverbs. > > > > Signed-off-by: Jason Gunthorpe <jgunthorpe@xxxxxxxxxxxxxxxxxxxx> > > buildlib/config.h.in | 1 + > > libibverbs/driver.h | 11 +++++++++++ > > libibverbs/libibverbs.map.in | 2 +- > > 3 files changed, 13 insertions(+), 1 deletion(-) > > > > Since Leon says people are using static provider libraries we should > > do more to make sure they work right. > > Jason, > > Can you dumb this down for me? I don't understand the provider static library part. > Do you mean an application statically linking in a provider library and dynamically > to libibverbs? Yes. > Why would someone do this? Not sure. Leon said there was interest and the patch is simple. Perhaps it makes sense when combined with libmlx5dv. Eg you could build a middleware library that embeds the 'dv' library. Maybe turn on LTO to gain some speed. > Are there examples of this? Compile rdma-core with -DENABLE_STATIC >From memory, untested: $ gcc -o foo foo.o -Wl,--whole-archive -lmlx5dv Jason -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
