I am under the impression that the piddir setting from any strongswan compilation will point to /var/run, while this folder seems to be explicitly removed by a recent installation of systemd. Which result to a suboptimal situation where strongswan fails.
I'm not sure the configure is enough. The source code references /var/run in lots of places.
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=ad14f55a7186180241f2ed1b89a117fceee04e05 commit ad14f55a7186180241f2ed1b89a117fceee04e05 Author: Thomas Deutschmann <whissi@gentoo.org> AuthorDate: 2019-01-06 21:09:00 +0000 Commit: Thomas Deutschmann <whissi@gentoo.org> CommitDate: 2019-01-06 21:57:00 +0000 net-vpn/strongswan: bump to v5.7.2 - Use /run instead of /var/run for PID dir Closes: https://bugs.gentoo.org/538102 Package-Manager: Portage-2.3.53, Repoman-2.3.12 Signed-off-by: Thomas Deutschmann <whissi@gentoo.org> net-vpn/strongswan/Manifest | 1 + net-vpn/strongswan/strongswan-5.7.2.ebuild | 304 +++++++++++++++++++++++++++++ 2 files changed, 305 insertions(+)