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