[dpdk-dev] [PATCH] librte_vhost: Fix compilation issue

[Thomas Monjalon]

Please check with Yong Liu for the template of test report.
We discussed it together.
Thanks

2014-10-29 08:48, Fu, JingguoX:
> Sorry, not excepted, those are expected!
> 
> Patch name: 		librte_vhost: Fix compilation issue
> Brief description: 	to fix compilation error on ubuntu14.04 for vhost lib and example
> Test Flag: 			Tested-by
> Tester name: 		jingguox.fu at intel.com
> Commit ID:			1ab07743b21b785a71fa334641ab58e779532600
> Result summary:		total 3 cases, 3 passed, 0 failed
> 
> Test Case 1:		
> Name:				compile vhost on fc20 with gcc 4.8.3 x86_64 	
> Environment:		OS: Fedora20 3.11.10-301.fc20.x86_64
> 				GCC: gcc 4.8.3
> 				CPU: Intel(R) Xeon(R) CPU E5-2680 v2 @ 2.80GHz
> 				NIC: Intel Corporation 82599ES 10-Gigabit SFI/SFP+ Network Connection [8086:10fb]
> expected:			compilation success
> Test result:		PASSED
> 
> Test Case 2:		
> Name:				compile vhost on fc20 with icc 14.0.2 x86_64 	
> Environment:		OS: Fedora20 3.11.10-301.fc20.x86_64
> 				ICC: icc 14.0.2
> 				CPU: Intel(R) Xeon(R) CPU E5-2680 v2 @ 2.80GHz
> 				NIC: Intel Corporation 82599ES 10-Gigabit SFI/SFP+ Network Connection [8086:10fb]
> expected:			compilation success
> Test result:		PASSED
> 
> Test Case 3:		
> Name:				compile vhost on UB14.04 with gcc 4.8.2 x86_64 	
> Environment:		OS: Ubuntu14.04 3.13.0-24-generic x86_64
> 				GCC: gcc 4.8.2
> 				CPU: Intel(R) Xeon(R) CPU E5-2680 v2 @ 2.80GHz
> 				NIC: Intel Corporation 82599ES 10-Gigabit SFI/SFP+ Network Connection [8086:10fb]
> expected:			compilation success
> Test result:		PASSED
> 
> -----Original Message-----
> From: Fu, JingguoX 
> Sent: Wednesday, October 29, 2014 16:17
> To: Ouyang, Changchun; dev at dpdk.org
> Cc: Cao, Waterman
> Subject: RE: [dpdk-dev] [PATCH] librte_vhost: Fix compilation issue
> 
> Patch name: 		librte_vhost: Fix compilation issue
> Brief description: 	to fix compilation error on ubuntu14.04 for vhost lib and example
> Test Flag: 			Tested-by
> Tester name: 		jingguox.fu at intel.com
> Commit ID:			1ab07743b21b785a71fa334641ab58e779532600
> Result summary:		total 3 cases, 3 passed, 0 failed
> 
> Test Case 1:		
> Name:				compile vhost on fc20 with gcc 4.8.3 x86_64 	
> Environment:		OS: Fedora20 3.11.10-301.fc20.x86_64
> 				GCC: gcc 4.8.3
> 				CPU: Intel(R) Xeon(R) CPU E5-2680 v2 @ 2.80GHz
> 				NIC: Intel Corporation 82599ES 10-Gigabit SFI/SFP+ Network Connection [8086:10fb]
> Excepted:			compilation success
> Test result:		PASSED
> 
> Test Case 2:		
> Name:				compile vhost on fc20 with icc 14.0.2 x86_64 	
> Environment:		OS: Fedora20 3.11.10-301.fc20.x86_64
> 				ICC: icc 14.0.2
> 				CPU: Intel(R) Xeon(R) CPU E5-2680 v2 @ 2.80GHz
> 				NIC: Intel Corporation 82599ES 10-Gigabit SFI/SFP+ Network Connection [8086:10fb]
> Excepted:			compilation success
> Test result:		PASSED
> 
> Test Case 3:		
> Name:				compile vhost on UB14.04 with gcc 4.8.2 x86_64 	
> Environment:		OS: Ubuntu14.04 3.13.0-24-generic x86_64
> 				GCC: gcc 4.8.2
> 				CPU: Intel(R) Xeon(R) CPU E5-2680 v2 @ 2.80GHz
> 				NIC: Intel Corporation 82599ES 10-Gigabit SFI/SFP+ Network Connection [8086:10fb]
> Excepted:			compilation success
> Test result:		PASSED
> 
> 
> 
> 
> -----Original Message-----
> From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Ouyang Changchun
> Sent: Wednesday, October 29, 2014 14:40
> To: dev at dpdk.org
> Subject: [dpdk-dev] [PATCH] librte_vhost: Fix compilation issue
> 
> It fixes this compilation complain: "error: ignoring return value of 'realpath', 
> declared with attribute warn_unused_result [-Werror=unused-result]"
> 
> Signed-off-by: Changchun Ouyang <changchun.ouyang at intel.com>
> ---
>  lib/librte_vhost/virtio-net.c | 9 ++++++---
>  1 file changed, 6 insertions(+), 3 deletions(-)
> 
> diff --git a/lib/librte_vhost/virtio-net.c b/lib/librte_vhost/virtio-net.c
> index 27ba175..8015dd8 100644
> --- a/lib/librte_vhost/virtio-net.c
> +++ b/lib/librte_vhost/virtio-net.c
> @@ -133,6 +133,7 @@ host_memory_map(struct virtio_net *dev, struct virtio_memory *mem,
>  	char mapfile[PATH_MAX];
>  	char procdir[PATH_MAX];
>  	char resolved_path[PATH_MAX];
> +	char *path = NULL;
>  	FILE		*fmap;
>  	void		*map;
>  	uint8_t		found = 0;
> @@ -235,9 +236,11 @@ host_memory_map(struct virtio_net *dev, struct virtio_memory *mem,
>  	while (NULL != (dptr = readdir(dp))) {
>  		snprintf(memfile, PATH_MAX, "/proc/%u/fd/%s",
>  				pid, dptr->d_name);
> -	    realpath(memfile, resolved_path);
> -		if (resolved_path == NULL) {
> -			RTE_LOG(ERR, VHOST_CONFIG, "(%"PRIu64") Failed to resolve fd directory\n", dev->device_fh);
> +		path = realpath(memfile, resolved_path);
> +		if (path == NULL) {
> +			RTE_LOG(ERR, VHOST_CONFIG,
> +				"(%"PRIu64") Failed to resolve fd directory\n",
> +				dev->device_fh);
>  			closedir(dp);
>  			return -1;
>  		}
>