Please read the documentation in docs or at https://libreswan.org/

Specific vendors/distribution build instructions available in packaging/

Build requirements
------------------
bison flex pkgconfig gcc make xmlto gmp-devel nss-devel nspr-devel

for systemd: pkgconfig hostname systemd
for pam/xauth: pam-devel
for dnssec support: unbound-devel, ldns-devel
for FIPS support: fipscheck-devel
for libcap-ng support: libcap-ng-devel
for CRL fetching support: openldap-devel curl-devel

Building userland
-----------------

	make programs 
	sudo make install

You can enable/disable features in Makefile.inc

Optional building alternative KLIPS IPsec stack:

on Linux 2.6 or higher for the running kernel:

	make module
	sudo make module_install

Build for a kernel different from the running kernel:

	make KERNELSRC=//usr/src/kernel/linux-9.42 module

Building KLIPS kernel module for the old Linux 2.4 kernel

	make module24 
	sudo make minstall24