app/test-pmd/csumonly.c: In function ?get_psd_sum?:
build/include/rte_ip.h:161: error: dereferencing pointer ?u16?
does break strict-aliasing rules
build/include/rte_ip.h:157: note: initialized from here
...
The root cause is that, compile enable strict aliasing by default,
while in function rte_raw_cksum() try to convert 'const char *'
to 'const uint16_t *'.
This patch is one workaround fix.
Signed-off-by: Michael Qiu <michael.qiu at intel.com>
---
v3 --> v2:
use uintptr_t instead of unsigned long to
save pointer.
v2 --> v1:
Workaround solution instead of shut off the
gcc params.
lib/librte_net/rte_ip.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/lib/librte_net/rte_ip.h b/lib/librte_net/rte_ip.h
index 61e4457..cda3436 100644
--- a/lib/librte_net/rte_ip.h
+++ b/lib/librte_net/rte_ip.h
@@ -154,7 +154,8 @@ struct ipv4_hdr {
static inline uint16_t
rte_raw_cksum(const char *buf, size_t len)
{
- const uint16_t *u16 = (const uint16_t *)buf;
+ uintptr_t ptr = (uintptr_t)buf;
+ const uint16_t *u16 = (const uint16_t *)ptr;
uint32_t sum = 0;
while (len >= (sizeof(*u16) * 4)) {
--
1.9.3
