Thanks Dave!
From: Dave Barach (dbarach) [mailto:dbar...@cisco.com]
Sent: Tuesday, November 15, 2016 9:53 AM
To: Shravan Ambati <shravan.amb...@calix.com>
Cc: vpp-dev@lists.fd.io
Subject: RE: @DPDK@ in Makefile.am files
Dear Shravan,
You'll find something like this in the adjacent configure.ac:
AC_ARG_WITH(dpdk,
AC_HELP_STRING([--with-dpdk],[Use the Intel dpdk]),
[with_dpdk=1],
[with_dpdk=0])
AC_SUBST(DPDK,[-DDPDK=${with_dpdk}])
Autotools arranges for @DPDK@ in Makefile.am to turn into -DDPDK=[0|1]
depending on whether the build system passes "--with-dpdk" [or
"--without-dpdk"] when the generated configure script runs.
Here's how the build system decides:
.../build-data/platforms/vpp.mk has the following setting:
vnet_configure_args_vpp = --with-dpdk
while ../build-data/platforms/vpp_lite.mk has the following setting:
vnet_configure_args_vpp_lite = # no dpdk
HTH... Dave
From: Shravan Ambati [mailto:shravan.amb...@calix.com]
Sent: Tuesday, November 15, 2016 12:17 PM
To: Dave Barach (dbarach) <dbar...@cisco.com<mailto:dbar...@cisco.com>>
Subject: @DPDK@ in Makefile.am files
Hi Dave,
I had a quick question on the Makefiles in vpp project.
Several the Makefile.am files use AM_CFLAGS = -Wall @DPDK@ ...
What do these @DPDK@ mean and what does it do.
I tried to google this but didn't get an answer.
Thanks
Shravan
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