Our customer reported the below warning whe using Clang v16.0.4 and C++20,
on a code that includes the header "/usr/include/infiniband/verbs.h":
error: bitwise operation between different enumeration types ('ibv_access_flags' and
'ib_uverbs_access_flags') is deprecated [-Werror,-Wdeprecated-enum-enum-conversion]
mem->mr = ibv_reg_mr(dev->pd, (void*)start, len, IBV_ACCESS_LOCAL_WRITE);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/infiniband/verbs.h:2514:19: note: expanded from macro 'ibv_reg_mr'
((access) & IBV_ACCESS_OPTIONAL_RANGE) == 0))
~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~~~~~~~
1 error generated.
According to the article "Clang 11 warning: Bitwise operation between different
enumeration types is deprecated":
C++20's P1120R0 deprecated bitwise operations between different enums. Such code is
likely to become ill-formed in C++23. Clang 11 warns about such cases. It should be fixed.
Reported-by: Rogerio Moraes <rogerio@xxxxxxxxxxx>
Signed-off-by: Daniel Vacek <neelx@xxxxxxxxxx>
---
libibverbs/verbs.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libibverbs/verbs.h b/libibverbs/verbs.h
index 03a7a2a7..ed9aed21 100644
--- a/libibverbs/verbs.h
+++ b/libibverbs/verbs.h
@@ -2590,7 +2590,7 @@ __ibv_reg_mr(struct ibv_pd *pd, void *addr, size_t length, unsigned int access,
#define ibv_reg_mr(pd, addr, length, access) \
__ibv_reg_mr(pd, addr, length, access, \
__builtin_constant_p( \
- ((access) & IBV_ACCESS_OPTIONAL_RANGE) == 0))
+ ((int)(access) & IBV_ACCESS_OPTIONAL_RANGE) == 0))
/**
* ibv_reg_mr_iova - Register a memory region with a virtual offset
--
2.40.1
