X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=doc%2Fguides%2Frel_notes%2Fknown_issues.rst;fp=doc%2Fguides%2Frel_notes%2Fknown_issues.rst;h=923a202df52c6d7d453f1bbcd65231754400ddc7;hb=6e5794d008278ad8e0bcb4b24a523aee8eedb434;hp=b782091516b27a44ed34e3d80d4d3505d4c87b8b;hpb=db39dd265a1d7be6b66beb16a2ba659e4d05fa6f;p=dpdk.git

diff --git a/doc/guides/rel_notes/known_issues.rst b/doc/guides/rel_notes/known_issues.rst
index b782091516..923a202df5 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).