Build for RHEL 8

[manison]

On RHEL 8 there are OpenSSL packages present in 1.1 version by default, however OpenSSL 3 can be installed side-by-side. Those packages are however named libcrypto3 and libssl3 respectively and default meson build script cannot find them.

We modified the script to alternatively look for suffixed packages (see below). I don't know if this is the correct way to solve the problem since I'm not the meson expert. However is supporting RHEL 8 something the maintainers would be interested in? Does this have a chance to be merged?

-libcrypto = dependency('libcrypto', version: '>= 3.0.7')
+libcrypto = dependency('libcrypto', version: '>= 3.0.7', required: false)
+if not libcrypto.found()
+  libcrypto = dependency('libcrypto3', version: '>= 3.0.7', required: true)
+endif
+
 provider_path = libcrypto.get_variable(pkgconfig: 'modulesdir')
-libssl = dependency('libssl', version: '>= 3.0.7')
+libssl = dependency('libssl', version: '>= 3.0.7', required: false)
+if not libssl.found()
+  libssl = dependency('libssl3', version: '>= 3.0.7', required: true)
+endif

[simo5]

If this is all is needed to make it build there, I have no particular objection.

[manison]

OK, thanks. Do we have someone to review this, maybe @ueno please?

[simo5]

Sure propose a PR and tag him

[neverpanic]

I'm not aware that RHEL 8 provides OpenSSL 3 packages. Are those from a third party source?

[manison]

I found them in EPEL.

[manison]

Link to the PR: #572