Re: [dpdk-dev] [PATCH 2/2] vhost: fix build error caused by 64bit print formatting

[David Christensen <drc@linux.vnet.ibm.com>]

>> Use of %llx print formatting causes meson build error on Power systems with
>> RHEL 7.6 and gcc 4.8.5.  Replace with PRIx64 macro.
>>
>> +                               (uint64_t)reg_struct.range.start,
>> +                               (uint64_t)reg_struct.range.start +
>> +                               (uint64_t)reg_struct.range.len - 1);

I didn't need them when compiling on Power but it's the only way I could 
get x86 to build without any warning:

cc -Ilib/lib@@rte_vhost@sta -Ilib -I../lib -Ilib/librte_vhost 
-I../lib/librte_vhost -I. -I../ -Iconfig -I../config 
-Ilib/librte_eal/common/include -I../lib/librte_eal/common/include 
-I../lib/librte_eal/linux/eal/include -Ilib/librte_eal/common 
-I../lib/librte_eal/common -Ilib/librte_eal/common/include/arch/x86 
-I../lib/librte_eal/common/include/arch/x86 -Ilib/librte_eal 
-I../lib/librte_eal -Ilib/librte_kvargs -I../lib/librte_kvargs 
-Ilib/librte_ethdev -I../lib/librte_ethdev -Ilib/librte_net 
-I../lib/librte_net -Ilib/librte_mbuf -I../lib/librte_mbuf 
-Ilib/librte_mempool -I../lib/librte_mempool -Ilib/librte_ring 
-I../lib/librte_ring -Ilib/librte_meter -I../lib/librte_meter 
-Ilib/librte_cryptodev -I../lib/librte_cryptodev -Ilib/librte_hash 
-I../lib/librte_hash -Ilib/librte_pci -I../lib/librte_pci -pipe 
-D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -O3 -include rte_config.h 
-Wunused-parameter -Wsign-compare -Wcast-qual -D_GNU_SOURCE -fPIC 
-march=native -fno-strict-aliasing -DALLOW_EXPERIMENTAL_API  -MD -MQ 
'lib/lib@@rte_vhost@sta/librte_vhost_vhost_user.c.o' -MF 
'lib/lib@@rte_vhost@sta/librte_vhost_vhost_user.c.o.d' -o 
'lib/lib@@rte_vhost@sta/librte_vhost_vhost_user.c.o' -c 
../lib/librte_vhost/vhost_user.c
../lib/librte_vhost/vhost_user.c: In function ‘vhost_user_set_mem_table’:
../lib/librte_vhost/vhost_user.c:1088:4: warning: format ‘%lx’ expects 
argument of type ‘long unsigned int’, but argument 4 has type ‘__u64’ 
[-Wformat=]
     RTE_LOG(INFO, VHOST_CONFIG,
     ^
../lib/librte_vhost/vhost_user.c:1088:4: warning: format ‘%lx’ expects 
argument of type ‘long unsigned int’, but argument 5 has type ‘__u64’ 
[-Wformat=]

This system was also RHEL 7.6 with gcc 4.8.5-36
Dave