I have an installation of DPDK and I'm trying to compile code with it. This worked on my WSL machine, however on the test server, with the same install of dpdk, I'm getting the error:
/usr/local/include/rte_mempool.h: error: unknown type name 'ssize_t'
I've noticed this header does not include /sys/types.h, but it also doesn't include that on the machine that this works on. I don't know where it's supposed to come from, but it's coming from somewhere.
How do I get these headers to be aware of ssize_t?
As noted in a comment:
The compiler options include -std=c99 -O3 -march=native -I/usr/local/include -include rte_config.h, and a whole bunch of -l options (dpdk's make structure adds these in). This prompted me to run gcc --version and the working one is Ubuntu gcc 9.3.0 and the broken one is gcc 5.4.0. Seems like it might be an incompatibility between dpdk and the gcc installed.
As mentioned in the comments by @JonathanLeffier, the root cause of the issue is including sys/types.h when gcc option --std=c99 is passed. The easiest fix without modifying the DPDK or sample code is to include the path to types.h as part of cflags.
If the native build is for x86_64 target, follow these steps:
find /usr/include/ -name types.h to identify the right file for local build (this is because the current cflags has -march=native)-std=c99 -O3 -march=native -I/usr/local/include -include rte_config.h to -std=c99 -O3 -march=native -I/usr/local/include -include rte_config.h --include=/usr/include/[target-machine]/sys/types.hNote: In my humble suggestion please use pkg-config for populating the right CFLAGS and LDFLAGS for both shared and static binary.