Add known issue about DPDK not compiling on some CPUs
with clang versions older than 3.7.0.
Signed-off-by: Pablo de Lara <pablo.de.lara.guarch at intel.com>
---
doc/guides/rel_notes/known_issues.rst | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/doc/guides/rel_notes/known_issues.rst
b/doc/guides/rel_notes/known_issues.rst
index b782091..923a202 100644
--- a/doc/guides/rel_notes/known_issues.rst
+++ b/doc/guides/rel_notes/known_issues.rst
@@ -598,3 +598,23 @@ VM power manager may not work on systems with more than 64
cores
**Driver/Module**:
VM power manager application.
+
+
+DPDK may not build on some Intel CPUs using clang < 3.7.0
+---------------------------------------------------------
+
+**Description**:
+ When compiling DPDK with an earlier version than 3.7.0 of clang, CPU flags
are not detected on some Intel platforms
+ such as Intel Broadwell/Skylake (and possibly future CPUs), and therefore
compilation fails due to missing intrinsics.
+
+**Implication**:
+ DPDK will not build when using a clang version < 3.7.0.
+
+**Resolution/Workaround**:
+ Use clang 3.7.0 or higher, or gcc.
+
+**Affected Environment/Platform**:
+ Platforms with Intel Broadwell/Skylake using an old clang version.
+
+**Driver/Module**:
+ Environment Abstraction Layer (EAL).
--
2.5.0
