[Kea-users] Some Info to make it possible to install Kea 3.2.0 from source - on openSUSE 15.6

[Paul Markfort]

Hopefully, this helps someone get kea 3.2.0 installed on their machine.

First, make sure you have at least 8Gb of Memory (including swap - I have 4Gb with an 8Gb swap).
meson/cmake seems to use at least 6Gb during the compile (running what seems to be 6 threads).

It seems Kea does not compile with the default version of g++ (7.5.0) on openSUSE 15.6
(by default, cmake selects: CXX="c++" )

I get errors like this:

[220/687] Compiling C++ object src/lib/http/libkea-http.so.100.0.0.p/date_time.cc.o
../src/lib/http/date_time.cc:16:32: warning: unknown option after ‘#pragma GCC diagnostic’ kind [-Wpragmas]
  #pragma GCC diagnostic ignored "-Wdeprecated-copy"

AND:
../src/lib/config_backend/base_config_backend_pool.h:509:17: note:   template argument deduction/substitution failed:
../src/lib/dhcpsrv/config_backend_pool_dhcp6.cc:511:80: note:   could not resolve address from overloaded function ‘& isc::dhcp::ConfigBackendDHCPv6::deleteOption6’
               pd_pool_prefix, pd_pool_prefix_length, code, space, client_classes));

(note, if this is a bug, my suggested fix is to require a minimum version of g++).


THIS IS WHAT I SUGGEST YOU DO:

To get it to compile, set this BEFORE you run meson setup:
	export CXX="g++-13"

This will cause meson (which uses cmake) to use g++ version 13 (it should be available as a standard package from the standard repos, if you don't already have it installed.  NOTE; An older version might work).
You can find info on this here on an openSUSE machine: /usr/share/cmake/Help/envvar/CXX.rst
I suspect this may work on other OSes where the default g++ version is a bit old.


Note, I setup the build with commands like the below:

I set:
	_src=/scratch/paulfm/BUILD/byuname/Linux/openSUSE/15.6/x86_64/6.4.0-150600.23.103-default/kea-3.2.0
	_install_dst=/usr/added/kea-dhcp.ver/kea-3.2.0
	(you can use other directories, I am just including this for clarity).
	
	cd ${_src}
	${_src}/meson.sh setup --wipe --prefix ${_install_dst} ${_src}/my.build ${_src}
Note: The --wipe is only needed if you want to restart the setup from scratch (for instance, you ran setup before with CXX unset).

Then to compile:
	 ${_src}/meson.sh compile -C ${_src}/my.build

And install with:
	${_src}/meson.sh install -C ${_src}/my.build






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Paul FM         Info: http://paulfm.com/~paulfm/
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