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* [dpdk-dev] [PATCH] doc: add known clang compilation issues
@ 2016-02-18 15:21 Pablo de Lara
  2016-02-18 15:23 ` Mcnamara, John
  0 siblings, 1 reply; 3+ messages in thread
From: Pablo de Lara @ 2016-02-18 15:21 UTC (permalink / raw)
  To: dev

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@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

^ permalink raw reply	[flat|nested] 3+ messages in thread
end of thread, other threads:[~2016-03-07 21:30 UTC | newest]

Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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2016-02-18 15:21 [dpdk-dev] [PATCH] doc: add known clang compilation issues Pablo de Lara
2016-02-18 15:23 ` Mcnamara, John
2016-03-07 21:28   ` Thomas Monjalon

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