[sr-dev] [kamailio/kamailio] pkg/kamailio/obs: used more recent gcc for RHEL and CentOS dists (#2711)

[Daniel-Constantin Mierla]

In Kamailio we do not have constraints on compiler versions, but try to follow a C standard, for many years we tried to stick to C89/C90/C95, to work on Unix-variants and old compilers. Now could be a lot of C99/C11, which fine.

But trying to tailor for a specific compiler version is really out of scope. It works with stock gcc and clang on major linux distros. Not sure if still works on icc (intel c compiler) and suncc, as we (or at least I) do not have access to systems providing them.

Again, if one wants to work on some CI/testing with different compilers and suggest eventual improvements, it could be an appreciated effort. But providing packages compiled with a different compiler than the distro's default one is not the norm out there, from my point of view feels like building a distro variant.

I do not see benefits in wasting time to review changes between gcc (or other compilers) versions. It sounds like let's see what changes are in newer libmysqlclient, libssl, libcurl, libev, libevent, ... and the other libs various modules use and then eventually package with their newer version. There is also the variant to build with clang instead of gcc, that opens another door of plenty of options to choose from.

My view is: if we provide Kamailio packages for distro X, we use the stock packages and apps in that distro to build them. There is no significant reason to do otherwise.

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