Require C++14 and GCC 6.3+

[Al2Klimov]

Because we can.

[Al2Klimov]

Blocked by

• https://git.icinga.com/packaging/rpm-icinga2/-/merge_requests/39
• https://git.icinga.com/packaging/subscription-rpm-icinga2/-/merge_requests/1
• GHA: build RHEL and Amazon Linux #9266
• rebase

[julianbrost]

I just stumbled upon that line, should be taken into account here as well when touching C++ versions:

icinga2/CMakeLists.txt

Line 398 in a51c004

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++0x")

[Al2Klimov]

Because we can.

One more reason for this:

The smaller the range of compiler versions we have to support, the easier that balancing act.

[Al2Klimov]

Not rebasing to trigger GHA for SLES+openSUSE 15.4 as both have GCC 7+.

[Al2Klimov]

According to @julianbrost some Boost things are going to require C++14 in v1.X. Depending on this and which distros we'll build the next minor for we'll consider backporting this.

[julianbrost]

You see this warning when compiling with a recent enough Boost version: https://github.com/boostorg/math/blob/boost-1.81.0/include/boost/math/tools/config.hpp#L16-L25

[Al2Klimov]

Correction: the overnext minor. Built Fedora 38 and Ubuntu 23.04 packages w/o any problems.

[Al2Klimov]

Wait. We don't use Boost.Math.

[julianbrost]

We don't but something we use does. IIRC it was lexical_cast.

[Al2Klimov]

Fedora 39 and Ubuntu 23.10 have Boost v1.81. Windows only matters once we prepare a release and discover compile failures anyway by ourselves. 3rd parties have patch mechanisms or are so bleeding edge that the obvious question will come up: why they're packaging Icinga < v2.14?

Nothing to do here, yet.