[PATCH v3 1/5] eal: add rte pure attribute macro

[Tyler Retzlaff <roretzla@linux.microsoft.com>]

Add __rte_pure for __attribute__((pure)) to permit elimination of
direct use of __attribute__((pure)) in other libs.

Signed-off-by: Tyler Retzlaff <roretzla@linux.microsoft.com>
Reviewed-by: Morten Brørup <mb@smartsharesystems.com>
---
 lib/eal/include/rte_common.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/lib/eal/include/rte_common.h b/lib/eal/include/rte_common.h
index 298a5c6..b15a5b2 100644
--- a/lib/eal/include/rte_common.h
+++ b/lib/eal/include/rte_common.h
@@ -137,6 +137,15 @@
 #define __rte_weak __attribute__((__weak__))
 
 /**
+ * Mark a function to be pure.
+ */
+#ifdef RTE_TOOLCHAIN_MSVC
+#define __rte_pure
+#else
+#define __rte_pure __attribute__((pure))
+#endif
+
+/**
  * Force symbol to be generated even if it appears to be unused.
  */
 #ifdef RTE_TOOLCHAIN_MSVC
-- 
1.8.3.1