doc: announce deprecation of CPU build flags

The RTE_MACHINE_CPUFLAGS_* macros in DPDK build just duplicate info from
the compiler macros, so we can remove them and just use the compiler
versions directly.

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
Acked-by: Jerin Jacob <jerinj@marvell.com>
Acked-by: Thomas Monjalon <thomas@monjalon.net>
Acked-by: Ferruh Yigit <ferruh.yigit@intel.com>

diff --git a/doc/guides/rel_notes/deprecation.rst b/doc/guides/rel_notes/deprecation.rst
index fb3547a..52489b5 100644 (file)
--- a/doc/guides/rel_notes/deprecation.rst
+++ b/doc/guides/rel_notes/deprecation.rst
@@ -24,6 +24,11 @@ Deprecation Notices
   can be got using the ``pip``, or ``pip3``, tool for downloading python
   packages.
 
+* build macros: The macros defining RTE_MACHINE_CPUFLAG_* will be removed
+  from the build. The information provided by these macros is available
+  through standard compiler macros. For example, RTE_MACHINE_CPUFLAG_SSE3
+  duplicates the compiler-provided macro __SSE3__.
+
 * kvargs: The function ``rte_kvargs_process`` will get a new parameter
   for returning key match count. It will ease handling of no-match case.