rdma-core: add new recipe

[valgur]

Adds https://github.com/linux-rdma/rdma-core

Required by openmpi (which uses libibverbs), libfabric (uses libefa and librdmacm) and possibly libpcap packages.

[conan-center-bot]

Conan v1 pipeline ✔️

All green in build 18 (e088f8b18d91c61c58dcbb5373359b9dee076abb):

• rdma-core/49.0:
  All packages built successfully! (All logs)

---

Conan v2 pipeline ✔️

Note: Conan v2 builds are now mandatory. Please read our discussion about it.

All green in build 18 (e088f8b18d91c61c58dcbb5373359b9dee076abb):

• rdma-core/49.0:
  All packages built successfully! (All logs)

[wadimklincov]

Building with build_librdmacm enabled fails, at least on my system (Debian 12, gcc 11):

build_assert.h:23:33: error: size of unnamed array is negative
23 | do { (void) sizeof(char [1 - 2*!(cond)]); } while(0)
| ^
src/librdmacm/acm.c:105:17: note: in expansion of macro ‘BUILD_ASSERT’
105 | BUILD_ASSERT(sizeof(IBACM_SERVER_PATH) <=
| ^~~~~~~~~~~~
[90/138] Building C object libibverbs/CMakeFiles/ibverbs.dir/marshall.c.o

Looks like the generated string for IBACM_SERVER_PATH exceeds the (108 byte?) limit of addr.unx.sun_path: /home/developer/.conan/data/rdma-core/49.0/_/_/package/c965b2ab63caf8e11f0c51cc66e6a9f195743f00/var/run/ibacm.port. Patching config.h.in seems to help.

Since this doesn't depend on systemd, perhaps could be patched by default?

[franramirez688]

LGTM 😁 Only a minor suggestion

[franramirez688]

The validation is already in the validate() function.

Suggested change

	if self.settings.os in ["Linux", "FreeBSD"]:
	self.requires("libudev/system")
	self.requires("libudev/system")

[franramirez688]

Looks like the generated string for IBACM_SERVER_PATH exceeds the (108 byte?) limit of addr.unx.sun_path: /home/developer/.conan/data/rdma-core/49.0/_/_/package/c965b2ab63caf8e11f0c51cc66e6a9f195743f00/var/run/ibacm.port. Patching config.h.in seems to help.

Since this doesn't depend on systemd, perhaps could be patched by default?

Oops, I did not see that. @valgur do you have any idea on how to solve this?

[jwillikers]

I think this is GPL-2.0-only.

Suggested change

	license = ("GPL-2.0", "Linux-OpenIB", "BSD-2-Clause")
	license = ("GPL-2.0-only", "Linux-OpenIB", "BSD-2-Clause")