> -----Original Message----- > From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Thomas Monjalon > Sent: Tuesday, February 16, 2016 6:46 AM > To: dev at dpdk.org > Subject: [dpdk-dev] [PATCH v2 2/4] examples/ip_pipeline: fix build for > x86_64 without SSE4.2 > > The compiler cannot use _mm_crc32_u64: > > examples/ip_pipeline/pipeline/hash_func.h:165:9: > error: implicit declaration of function '_mm_crc32_u64' is invalid in C99 > > Fixes: 947024a26df7 ("examples/ip_pipeline: rework passthrough pipeline") > > Signed-off-by: Thomas Monjalon <thomas.monjalon at 6wind.com> > --- > examples/ip_pipeline/pipeline/hash_func.h | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/examples/ip_pipeline/pipeline/hash_func.h > b/examples/ip_pipeline/pipeline/hash_func.h > index 7846300..1953ad4 100644 > --- a/examples/ip_pipeline/pipeline/hash_func.h > +++ b/examples/ip_pipeline/pipeline/hash_func.h > @@ -152,7 +152,7 @@ hash_xor_key64(void *key, __rte_unused uint32_t > key_size, uint64_t seed) > return (xor0 >> 32) ^ xor0; > } > > -#if defined(__x86_64__) > +#if defined(__x86_64__) && defined(RTE_CPUFLAG_SSE4_2) > > #include <x86intrin.h> > > -- > 2.7.0
Hi Thomas, This is not the correct fix, as RTE_CPUFLAG_SSE4_2 is a flag that can only be tested at run-time (as result of calling function rte_cpu_get_flag_enabled()), not at build-time. The reason it appears to fix the build issue you are mentioning is the fact that this change results in disabling the __x86_64__ code branch. We need to revert this patch and look for a better option. What is the compiler that generates the build issue you are mentioning? We could not reproduce it with gcc 5 (gcc 5.3.1). Thanks, Cristian
