[dpdk-dev] [PATCH 1/1] net/mlx4: fix build on PPC64

[Christian Ehrhardt <christian.ehrhardt@canonical.com>]

The AltiVec header file breaks boolean type:

error: incompatible types when initializing type
'__vector _bool int' {aka '_vector(4) __bool int'} using type 'int'

If __APPLE_ALTIVEC__ is defined, then bool type is redefined
and conflicts with stdbool.h.

There is no good solution to fix it for the whole project without
breaking something else, so a workaround is inserted in mlx5 PMD.
This workaround is not compatible with C++ but there is no C++ in DPDK.

Related to:
https://git.dpdk.org/dpdk/commit/?id=725f5dd0bfb50192a2d2341d4cc69084c2c4e03d

Change-Id: Iceb058c07086def4176c5ab199ca4dd5018d0340
Signed-off-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
---
 drivers/net/mlx4/mlx4_utils.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/net/mlx4/mlx4_utils.h b/drivers/net/mlx4/mlx4_utils.h
index a49190252..74b9d2ecd 100644
--- a/drivers/net/mlx4/mlx4_utils.h
+++ b/drivers/net/mlx4/mlx4_utils.h
@@ -15,6 +15,16 @@
 
 #include "mlx4.h"
 
+/*
+ * Compilation workaround for PPC64 when AltiVec is fully enabled, e.g. std=c11.
+ * Otherwise there would be a type conflict between stdbool and altivec.
+ */
+#if defined(__PPC64__) && !defined(__APPLE_ALTIVEC__)
+#undef bool
+/* redefine as in stdbool.h */
+#define bool _Bool
+#endif
+
 extern int mlx4_logtype;
 
 #ifndef NDEBUG
-- 
2.22.0