#                                               -*- Autoconf -*-
# Process this file with autoconf to produce a configure script.

AC_INIT([lxc], [0.9.0.alpha2])

AC_CONFIG_SRCDIR([configure.ac])
AC_CONFIG_AUX_DIR([config])
AM_CONFIG_HEADER([src/config.h])
AM_INIT_AUTOMAKE([-Wall -Werror -Wno-portability])
AC_CANONICAL_HOST
AM_PROG_CC_C_O
AC_GNU_SOURCE

# Detect the distribution. This is used for the default configuration and
# for some distro-specific build options.
AC_MSG_CHECKING([host distribution])
AC_ARG_WITH(distro, AS_HELP_STRING([--with-distro=DISTRO], [Specify the Linux distribution to target: One of redhat, oracle, fedora, suse, gentoo, debian, arch, slackware, paldo, mandriva or pardus.]))
if test "z$with_distro" = "z"; then
	with_distro=`lsb_release -is`
fi
if test "z$with_distro" = "z"; then
	AC_CHECK_FILE(/etc/redhat-release,with_distro="redhat")
	AC_CHECK_FILE(/etc/oracle-release,with_distro="oracle")
	AC_CHECK_FILE(/etc/fedora-release,with_distro="fedora")
	AC_CHECK_FILE(/etc/SuSE-release,with_distro="suse")
	AC_CHECK_FILE(/etc/gentoo-release,with_distro="gentoo")
	AC_CHECK_FILE(/etc/debian_version,with_distro="debian")
	AC_CHECK_FILE(/etc/arch-release,with_distro="arch")
	AC_CHECK_FILE(/etc/slackware-version,with_distro="slackware")
	AC_CHECK_FILE(/etc/frugalware-release,with_distro="frugalware")
	AC_CHECK_FILE(/etc/mandrakelinux-release, with_distro="mandriva")
	AC_CHECK_FILE(/etc/mandriva-release,with_distro="mandriva")
	AC_CHECK_FILE(/etc/pardus-release,with_distro="pardus")
fi
with_distro=`echo ${with_distro} | tr '[[:upper:]]' '[[:lower:]]'`

if test "z$with_distro" = "z"; then
	with_distro="unknown"
fi
case $with_distro in
	ubuntu)
		conffile=lxc.conf.ubuntu
		;;
	redhat|fedora|oracle|oracleserver)
		conffile=lxc.conf.libvirt
		;;
	*)
		echo -n "Linux distribution network config unknown, defaulting to lxc.network.type = empty"
		conffile=lxc.conf.unknown
		;;
esac
AC_MSG_RESULT([$with_distro])
AM_CONDITIONAL([HAVE_DEBIAN], [test x"$with_distro" = "xdebian" -o x"$with_distro" = "xubuntu"])

# Allow disabling rpath
AC_ARG_ENABLE([rpath],
	[AC_HELP_STRING([--disable-rpath], [do not set rpath in executables])],
	[], [enable_rpath=yes])
AM_CONDITIONAL([ENABLE_RPATH], [test "x$enable_rpath" = "xyes"])

# Documentation (manpages)
AC_ARG_ENABLE([doc],
	[AC_HELP_STRING([--enable-doc], [make mans (require docbook2x-man installed) [default=auto]])],
	[], [enable_doc=auto])

if test "x$enable_doc" = "xyes" -o "x$enable_doc" = "xauto"; then
	db2xman=""

	AC_MSG_CHECKING(for docbook2x-man)
	for name in docbook2x-man db2x_docbook2man; do
		if "$name" --help >/dev/null 2>&1; then
			db2xman="$name"
			break;
		fi
	done

	if test -n "${db2xman}"; then
		AC_MSG_RESULT([${db2xman}])
	else
		AC_MSG_RESULT([no])
		if test "x$enable_doc" = "xyes"; then
			AC_MSG_ERROR([docbook2x-man required by man request, but not found])
		fi
	fi

	AC_SUBST(db2xman)
fi
AM_CONDITIONAL([ENABLE_DOCBOOK], [test "x$db2xman" != "x"])

# Apparmor
AC_ARG_ENABLE([apparmor],
	[AC_HELP_STRING([--enable-apparmor], [enable apparmor])],
	[], [enable_apparmor=check])

if test "$enable_apparmor" = "check" ; then
	AC_CHECK_LIB([apparmor],[aa_change_profile],[enable_apparmor=yes], [enable_apparmor=no])
fi
AM_CONDITIONAL([ENABLE_APPARMOR], [test "x$enable_apparmor" = "xyes"])

AM_COND_IF([ENABLE_APPARMOR],
	[AC_CHECK_HEADER([sys/apparmor.h],[],[AC_MSG_ERROR([You must install the AppArmor development package in order to compile lxc])])
	AC_CHECK_LIB([apparmor], [aa_change_profile],[],[AC_MSG_ERROR([You must install the AppArmor development package in order to compile lxc])])
	AC_SUBST([APPARMOR_LIBS], [-lapparmor])])

# Seccomp syscall filter
AC_ARG_ENABLE([seccomp],
	[AC_HELP_STRING([--enable-seccomp], [enable seccomp])],
	[], [enable_seccomp=check])

if test "$enable_seccomp" = "check" ; then
	AC_CHECK_LIB([seccomp],[seccomp_init],[enable_seccomp=yes],[enable_seccomp=no])
fi
AM_CONDITIONAL([ENABLE_SECCOMP], [test "x$enable_seccomp" = "xyes"])

AM_COND_IF([ENABLE_SECCOMP],
	[AC_CHECK_HEADER([seccomp.h],[],[AC_MSG_ERROR([You must install the seccomp development package in order to compile lxc])])
	AC_CHECK_LIB([seccomp], [seccomp_init],[],[AC_MSG_ERROR([You must install the seccomp development package in order to compile lxc])])
	AC_SUBST([SECCOMP_LIBS], [-lseccomp])])

# HAVE_SCMP_FILTER_CTX=1 will tell us we have libseccomp api >= 1.0.0
AC_CHECK_TYPES([scmp_filter_ctx], [], [], [#include <seccomp.h>])

# Configuration examples
AC_ARG_ENABLE([examples],
	[AC_HELP_STRING([--disable-examples], [do not install configuration examples])],
	[], [enable_examples=yes])
AM_CONDITIONAL([ENABLE_EXAMPLES], [test "x$enable_examples" = "xyes"])

# Python3 module and scripts
AC_ARG_ENABLE([python],
	[AC_HELP_STRING([--enable-python], [enable python binding])],
	[enable_python=yes], [enable_python=no])
AM_CONDITIONAL([ENABLE_PYTHON], [test "x$enable_python" = "xyes"])

AM_COND_IF([ENABLE_PYTHON],
	[AM_PATH_PYTHON([3.2], [], [AC_MSG_ERROR([You must install python3])])
	PKG_CHECK_MODULES([PYTHONDEV], [python3 >= 3.2],[],[AC_MSG_ERROR([You must install python3-dev])])
	AC_DEFINE_UNQUOTED([ENABLE_PYTHON], 1, [Python3 is available])])

# Optional test binaries
AC_ARG_ENABLE([tests],
	[AC_HELP_STRING([--enable-tests], [build test/example binaries])],
	[enable_tests=yes], [enable_tests=no])
AM_CONDITIONAL([ENABLE_TESTS], [test "x$enable_tests" = "xyes"])

# LXC container path, where the containers are actually stored
AC_ARG_WITH([config-path],
	[AC_HELP_STRING(
		[--with-config-path=dir],
		[lxc configuration repository path]
	)], [], [with_config_path=['${localstatedir}/lib/lxc']])

# Rootfs path, where the container mount structure is assembled
AC_ARG_WITH([rootfs-path],
	[AC_HELP_STRING(
		[--with-rootfs-path=dir],
		[lxc rootfs mount point]
	)], [], [with_rootfs_path=['${libdir}/lxc/rootfs']])

# Expand some useful variables
AS_AC_EXPAND(PREFIX, "$prefix")
AS_AC_EXPAND(LIBDIR, "$libdir")
AS_AC_EXPAND(BINDIR, "$bindir")
AS_AC_EXPAND(LIBEXECDIR, "$libexecdir")
AS_AC_EXPAND(INCLUDEDIR, "$includedir")
AS_AC_EXPAND(SYSCONFDIR, "$sysconfdir")
AS_AC_EXPAND(DATADIR, "$datadir")
AS_AC_EXPAND(LOCALSTATEDIR, "$localstatedir")
AS_AC_EXPAND(DOCDIR, "$docdir")
AS_AC_EXPAND(LXC_CONFFILE, "$conffile")
AS_AC_EXPAND(LXC_GENERATE_DATE, "$(date)")
AS_AC_EXPAND(LXCPATH, "$with_config_path")
AS_AC_EXPAND(LXCROOTFSMOUNT, "$with_rootfs_path")
AS_AC_EXPAND(LXCTEMPLATEDIR, "$datadir/lxc/templates")
AS_AC_EXPAND(LXCINITDIR, "$libexecdir")

# Check for some standard kernel headers
AC_CHECK_HEADERS([linux/unistd.h linux/netlink.h linux/genetlink.h],
				[],
				AC_MSG_ERROR([Please install the Linux kernel headers.]),
				[#include <sys/socket.h>])

# Allow disabling libcap support
AC_ARG_ENABLE([capabilities],
	[AC_HELP_STRING([--disable-capabilities], [disable kernel capabilities])],
	[], [enable_capabilities=yes])

# Check for libcap support
if test "x$enable_capabilities" = "xyes"; then
	AC_CHECK_LIB(cap,cap_set_proc,caplib=yes,caplib=no)
	AC_MSG_CHECKING([linux capabilities])
	if test "x$caplib" = "xyes" ; then
		CAP_LIBS="-lcap"
		AC_MSG_RESULT([$CAP_LIBS])
	else
		AC_MSG_RESULT([no])
		AC_MSG_ERROR([You are missing libcap support. If you really want to build without kernel capabilities, use --disable-capabilities])
	fi
else
	CAP_LIBS=""
fi
AC_SUBST([CAP_LIBS])

# Check for alternate C libraries
AC_MSG_CHECKING(for bionic libc)
AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
	[[#ifndef __ANDROID__
error: Not bionic!
#endif]])],
	[is_bionic=yes],
	[is_bionic=no])
if test "x$is_bionic" = "xyes"; then
	AC_DEFINE([IS_BIONIC], 1, [bionic libc])
	AC_MSG_RESULT([yes])
else
	AC_MSG_RESULT([no])
fi
AM_CONDITIONAL([IS_BIONIC], [test "x$is_bionic" = "xyes"])

# Some systems lack PR_CAPBSET_DROP definition => HAVE_DECL_PR_CAPBSET_DROP
AC_CHECK_DECLS([PR_CAPBSET_DROP], [], [], [#include <sys/prctl.h>])

# Check for some headers
AC_CHECK_HEADERS([sys/signalfd.h pty.h sys/capability.h sys/personality.h utmpx.h sys/timerfd.h])

# Check for some syscalls functions
AC_CHECK_FUNCS([setns pivot_root sethostname unshare])

# Check for some functions
AC_CHECK_LIB(util, openpty)
AC_CHECK_FUNCS([openpty hasmntopt setmntent endmntent])
AC_CHECK_FUNCS([getline],
	AM_CONDITIONAL(HAVE_GETLINE, true)
	AC_DEFINE(HAVE_GETLINE,1,[Have getline]),
	AM_CONDITIONAL(HAVE_GETLINE, false))
AC_CHECK_FUNCS([fgetln],
	AM_CONDITIONAL(HAVE_FGETLN, true)
	AC_DEFINE(HAVE_FGETLN,1,[Have fgetln]),
	AM_CONDITIONAL(HAVE_FGETLN, false))

# Check for some standard binaries
AC_PROG_GCC_TRADITIONAL
AC_PROG_SED

if test "x$GCC" = "xyes"; then
	CFLAGS="$CFLAGS -Wall -Werror"
fi

# Files requiring some variable expansion
AC_CONFIG_FILES([
	Makefile
	lxc.pc
	lxc.spec
	config/Makefile

	doc/Makefile
	doc/lxc-create.sgml
	doc/lxc-destroy.sgml
	doc/lxc-execute.sgml
	doc/lxc-start.sgml
	doc/lxc-checkpoint.sgml
	doc/lxc-restart.sgml
	doc/lxc-stop.sgml
	doc/lxc-console.sgml
	doc/lxc-freeze.sgml
	doc/lxc-unfreeze.sgml
	doc/lxc-monitor.sgml
	doc/lxc-wait.sgml
	doc/lxc-ls.sgml
	doc/lxc-ps.sgml
	doc/lxc-cgroup.sgml
	doc/lxc-kill.sgml
	doc/lxc-attach.sgml
	doc/lxc.conf.sgml
	doc/lxc.sgml
	doc/common_options.sgml
	doc/see_also.sgml
	doc/legacy/lxc-ls.sgml

	doc/rootfs/Makefile

	doc/examples/Makefile
	doc/examples/lxc-macvlan.conf
	doc/examples/lxc-vlan.conf
	doc/examples/lxc-no-netns.conf
	doc/examples/lxc-empty-netns.conf
	doc/examples/lxc-phys.conf
	doc/examples/lxc-veth.conf
	doc/examples/lxc-complex.conf

	templates/Makefile
	templates/lxc-lenny
	templates/lxc-debian
	templates/lxc-ubuntu
	templates/lxc-ubuntu-cloud
	templates/lxc-opensuse
	templates/lxc-busybox
	templates/lxc-fedora
	templates/lxc-oracle
	templates/lxc-altlinux
	templates/lxc-sshd
	templates/lxc-archlinux
	templates/lxc-alpine

	src/Makefile
	src/lxc/Makefile
	src/lxc/lxc-ps
	src/lxc/lxc-netstat
	src/lxc/lxc-checkconfig
	src/lxc/lxc-setcap
	src/lxc/lxc-setuid
	src/lxc/lxc-version
	src/lxc/lxc-create
	src/lxc/lxc-clone
	src/lxc/lxc-shutdown
	src/lxc/lxc-start-ephemeral
	src/lxc/lxc-destroy
	src/lxc/legacy/lxc-ls

	src/python-lxc/Makefile
	src/python-lxc/lxc/__init__.py
	src/python-lxc/examples/api_test.py

	src/tests/Makefile
])
AC_CONFIG_COMMANDS([default],[[]],[[]])
AC_OUTPUT


# Detect missing setcap binary
AC_CHECK_PROG(SETCAP, setcap, yes, no, $PATH$PATH_SEPARATOR/sbin)
if test "x$SETCAP" = "xno"; then
	AC_MSG_NOTICE([

Warning:
--------

The setcap binary was not found. This means the tools to set the
privilege for the lxc commands are not available, that's ok, but you
will need to run these commands as root or install libcap-2.

])

else

   AC_MSG_NOTICE([

Advice:
-------

If you wish to have a non root user to use the lxc tools,
you can add the needed capabilities to the tools by invoking
the 'lxc-setcap' script. To remove the capabilities, use
'lxc-setcap -d'.
])
fi