[dpdk-dev] [PATCH v2 1/2] vfio: fix build if build envrionment is on old kernel

[Thomas Monjalon]

2015-07-09 16:26, Stephen Hemminger:
> From: Stephen Hemminger <shemming at brocade.com>
> 
> The build of DPDK may be done on a system where Linux headers
> in /usr/include (and therefore kernel version macro) are much
> older than the target runtime system.

It seems strange wanting to build a feature not present in the kernel
headers. Why not upgrading the build system kernel?

> In order to work around this, one solution is to put in simplified
> kernel header (this is what the compat stuff is already doing).

The other solution (as already suggested by Anatoly) is to have a configure
script (not an autotool one). It would make clear that VFIO support is not
built.
Ref: http://dpdk.org/ml/archives/dev/2015-April/016772.html