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Document how to use configure and what to pass to make(1). Signed-off-by: Olaf Hering <[email protected]> Acked-by: Ian Campbell <[email protected]> [ ijc -- fix a few typos ]
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| Compiling Xen from source | ||
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| * Overview | ||
| * Options recognized by configure | ||
| * Variables recognized by make | ||
| * Systemd support | ||
| * History of options | ||
| * Examples | ||
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| Overview | ||
| ======== | ||
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| The xen source contains four subsystems: xen, tools, stubdom and docs. | ||
| All but xen have to be prepared for build with a configure script in the | ||
| toplevel directory. configure recognizes certain arguments and | ||
| environment variables which are used to adjust various aspects of the | ||
| following compile process. Once configure is done, make(1) has to be | ||
| called. Also make(1) recognizes certain arguments. The following sections | ||
| will give an overview. | ||
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| Options recognized by configure | ||
| =============================== | ||
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| The configure script in the toplevel directory will recognize these | ||
| options. It will pass them to the configure scripts in the tools, | ||
| stubdom, and docs directory. | ||
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| Individual subsystems can be selected by one of the following options. | ||
| Please note that stubdom requires tools. | ||
| --disable-xen | ||
| --disable-tools | ||
| --enable-stubdom | ||
| --disable-docs | ||
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| The well known GNU configure options to specify the target directories. | ||
| Some components of these paths will be compiled into the binaries. | ||
| Note: prefix defaults to /usr/local, sysconfdir defaults to /etc, | ||
| localstatedir defaults to /var. | ||
| --prefix=DIR | ||
| --libdir=DIR | ||
| --libexecdir=BASEDIR | ||
| --bindir=DIR | ||
| --sbindir=DIR | ||
| --sysconfdir=DIR | ||
| --sharedstatedir=DIR | ||
| --localstatedir=DIR | ||
| --includedir=DIR | ||
| --datarootdir=DIR | ||
| --datadir=DIR | ||
| --mandir=DIR | ||
| --docdir=DIR | ||
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| To automatically run the toolstack in dom0 during system startup some | ||
| sysv runlevel scripts are installed. This option allows to set the path | ||
| for a given system. Possible values are /etc/init.d, /etc/rc.d/init.d or | ||
| /etc/rc.d. If not specified configure tries to guess the path. | ||
| --with-initddir=DIR | ||
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| The runlevel scripts load certain configuration files. They are | ||
| typically located in a subdirectory of /etc. Possible values are this | ||
| subdirectory are "sysconfig" or "default". If not specified configure | ||
| tries to guess the subdir. | ||
| --with-sysconfig-leaf-dir=SUBDIR | ||
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| If the tools are configured with a non-standard --prefix the runtime | ||
| linker will either not find the required libraries or it will load them | ||
| from a wrong location. Compiling the tools with rpath will force the | ||
| linker to look in the correct location. | ||
| --enable-rpath | ||
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| During build in a git checkout the buildsystem needs to download | ||
| additional tools such as qemu. This is done with either the native git | ||
| protocol, or via http if this option is enabled. | ||
| --enable-githttp | ||
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| Disable xenstat and xentop monitoring tools. | ||
| --disable-monitors | ||
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| Disable build of certain ocaml libraries and tools. To actually build | ||
| them ocaml development packages must be installed. If they are missing | ||
| configure will automatically disable this option. | ||
| --disable-ocamltools | ||
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| Disable XSM policy compilation. | ||
| --disable-xsmpolicy | ||
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| Attempt to build of an OVMF firmware binary. This requires special | ||
| versions of development tools. Use at your own risk. | ||
| --enable-ovmf | ||
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| Use the given OVMF binary instead of compiling a private copy. | ||
| --with-system-ovmf=PATH | ||
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| Build a private copy of SeaBIOS. | ||
| --disable-seabios | ||
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| Use the given SeaBIOS binary instead of compiling a private copy. | ||
| --with-system-seabios=PATH | ||
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| Build the old qemu used by xm/xend. This is required if existing domUs | ||
| should be migrated to this host, or if existing domU snapshots should be | ||
| started with this version of the tools. Only if all domUs used the new | ||
| upstream qemu during initial start it is safe to disable this option. | ||
| The old qemu requires rombios, which can be disable along with | ||
| qemu-traditional. | ||
| --enable-qemu-traditional | ||
| --enable-rombios | ||
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| The libxl toolstack uses the upstream qemu per default. A private copy | ||
| will be built. If desired this private copy can be configured with | ||
| additional options passed to its configure script. | ||
| --with-extra-qemuu-configure-args="arg1 arg2" | ||
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| Use the given qemu binary instead of compiling a private copy. | ||
| --with-system-qemu=PATH | ||
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| A dom0 requires a set of backend drivers. The configure script already | ||
| supplies a list of known drivers which are automatically loaded in dom0. | ||
| This internal list can be changed with this option. | ||
| --with-linux-backend-modules="kmod1 kmod2" | ||
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| Two variants of a xenstored exist: the original xenstored written in C | ||
| (xenstored) or the newer and robust one written in Ocaml (oxenstored). | ||
| The oxenstored daemon is the default but can only be used if the | ||
| required ocaml packages are installed. In case they are missing the | ||
| original xenstored will be used. Valid names are xenstored and | ||
| oxenstored. | ||
| --with-xenstored=name | ||
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| Using additional CFLAGS to build tools running in dom0 is required when | ||
| building distro packages. This is the option to pass things like | ||
| RPM_OPT_FLAGS. | ||
| --with-extra-cflags-tools=EXTRA_CFLAGS | ||
| --with-extra-cflags-qemu-traditional=EXTRA_CFLAGS | ||
| --with-extra-cflags-qemu-upstream=EXTRA_CFLAGS | ||
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| Instead of starting the tools in dom0 with sysv runlevel scripts they | ||
| can also be started by systemd. If this option is enabled xenstored will | ||
| receive the communication socked directly from systemd. So starting it | ||
| manually will not work anymore. The paths to systemd internals can also | ||
| be changed in case the default paths do not fit anymore. | ||
| NOTE: if systemd development packages are installed the systemd support | ||
| will be the enabled per default. Using --disable-systemd will override | ||
| this detection and the sysv runlevel scripts have to be used. | ||
| --enable-systemd | ||
| --with-systemd=DIR | ||
| --with-systemd-modules-load=DIR | ||
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| The old backend drivers are disabled because qdisk is now the default. | ||
| This option can be used to build them anyway. | ||
| --enable-blktap1 | ||
| --enable-blktap2 | ||
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| Build various stubom components, some are only example code. Its usually | ||
| enough to specify just --enable-stubdom and leave these options alone. | ||
| --enable-ioemu-stubdom | ||
| --enable-c-stubdom | ||
| --enable-caml-stubdom | ||
| --disable-pv-grub | ||
| --disable-xenstore-stubdom | ||
| --enable-vtpm-stubdom | ||
| --enable-vtpmmgr-stubdom | ||
| --disable-extfiles | ||
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| Per default some parts of the tools code will print additional runtime | ||
| debug. This option can be used to disable such code paths. | ||
| --disable-debug | ||
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| The configure script recognizes also many environment variables. Calling | ||
| the individual configure scripts in the subdirectories with the "--help" | ||
| option will list these environment variables. | ||
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| Variables recognized by make | ||
| ========================== | ||
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| The following variables are recognized by the build system. They have to | ||
| be passed as make options, like 'make variable=value'. Having these | ||
| variables in the environment, like 'env variable=value make', will not | ||
| work for most of them. | ||
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| In addition to pass variables as make options it is also supported to | ||
| create a ".config" file in the toplevel directory. The file will be | ||
| sourced by make(1). | ||
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| The well known variable to specify an offset during make install, | ||
| useful for packaging. | ||
| DESTDIR= | ||
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| Per default some parts of the tools code will print additional runtime | ||
| debug. This option can be used to disable such code paths. | ||
| debug=y | ||
| debug_symbols=y | ||
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| If --prefix= was used during configure the and ocaml was enabled the | ||
| resulting libraries will not be installed in the specified path. Instead | ||
| the path provided by ocamlfind(1) will be used. This variable can be | ||
| used to override this path. Using the environment variable | ||
| OCAMLFIND_DESTDIR= and OCAMLFIND_METADIR= will have the same effect. | ||
| OCAMLDESTDIR= | ||
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| The xen subsystem will install the hypervisor into fixed locations. | ||
| BOOT_DIR defaults to /boot, EFI_DIR to /usr/lib64/efi. | ||
| BOOT_DIR= | ||
| EFI_DIR= | ||
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| The make target 'rpmball' will build a xen.rpm. This variable can be | ||
| used to append a custom string to the name. | ||
| PKG_SUFFIX= | ||
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| The hypervisor will report a certain version string. This variable can | ||
| be used to append a custom string to the version. | ||
| XEN_VENDORVERSION= | ||
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| During boot xen will report a certain user@host string, which can be | ||
| changed with these variables. | ||
| XEN_WHOAMI= | ||
| XEN_DOMAIN= | ||
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| The following variables can be used to tweak some aspects of the | ||
| hypervisor build. | ||
| verbose=y | ||
| perfc=y | ||
| perfc_arrays=y | ||
| lock_profile=y | ||
| crash_debug=y | ||
| frame_pointer=y | ||
| lto=y | ||
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| During tools build external repos will be cloned into the source tree. | ||
| This variable can be used to point to a different git binary to be used. | ||
| GIT= | ||
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| During tools build external repos will be cloned into the source tree. | ||
| During stubdom build external packages will be downloaded into the | ||
| source tree. These variables can be used to point to a different | ||
| locations. | ||
| XEN_EXTFILES_URL= | ||
| OVMF_UPSTREAM_URL= | ||
| QEMU_UPSTREAM_URL= | ||
| QEMU_TRADITIONAL_URL= | ||
| SEABIOS_UPSTREAM_URL= | ||
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| This variable can be used to use DIR/include and DIR/lib during build. | ||
| This is the same as PREPEND_LIB and PREPEND_INCLUDES. APPEND_LIB and | ||
| APPEND_INCLUDES= will be appended to the CFLAGS/LDFLAGS variable. | ||
| EXTRA_PREFIX=DIR | ||
| PREPEND_LIB=DIR | ||
| PREPEND_INCLUDES=DIR | ||
| APPEND_LIB=DIR | ||
| APPEND_INCLUDES=DIR | ||
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| While the tools build will set the path to the python binary with the | ||
| configure script, the hypervisor build has to use this variable to use a | ||
| different python binary. | ||
| PYTHON= | ||
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| Building the python tools may fail unless certain options are passed to | ||
| setup.py. Config.mk contains additional info how to use this variable. | ||
| PYTHON_PREFIX_ARG= | ||
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| The hypervisor may be build with XSM support, which can be changed with | ||
| the following variables. | ||
| XSM_ENABLE=y | ||
| FLASK_ENABLE=y | ||
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| Do a build for coverage. | ||
| coverage=y | ||
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| Use clang instead of GCC. | ||
| clang=y | ||
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| Systemd support | ||
| =============== | ||
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| If the systemd development packages are available then the support for | ||
| systemd will be enabled per default. It is required to manually enable | ||
| the installed systemd service files. Systemd has dependency tracking, | ||
| which means all dependencies will be started automatically: | ||
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| systemctl enable xen-qemu-dom0-disk-backend.service | ||
| systemctl enable xen-init-dom0.service | ||
| systemctl enable xenconsoled.service | ||
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| Other optional services are: | ||
| systemctl enable xen-domains.service | ||
| systemctl enable xen-watchdog.service | ||
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| History of options | ||
| ================== | ||
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| Prior to xen-4.5 configure recognized essentially only the --prefix= and | ||
| --libdir= option to specify target directories. Starting with xen-4.5 | ||
| all paths can be adjusted once with configure. | ||
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| Examples | ||
| ======== | ||
|
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| * To build a private copy of tools and xen: | ||
| configure --prefix=/odd/path --sysconfdir=/odd/path/etc --enable-rpath | ||
| make | ||
| sudo make install BOOT_DIR=/ood/path/boot EFI_DIR=/odd/path/efi | ||
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| * Use configure and make to build a distro rpm package (it is required | ||
| to unset variables set by the rpm configure macro): | ||
| %build | ||
| export WGET=$(type -P false) | ||
| export GIT=$(type -P false) | ||
| %configure \ | ||
| --with-extra-cflags-tools="$RPM_OPT_FLAGS" \ | ||
| --with-extra-cflags-qemu-traditional="$RPM_OPT_FLAGS" \ | ||
| --with-extra-cflags-qemu-upstream="$RPM_OPT_FLAGS" \ | ||
| --with-initddir=%{_initddir} | ||
| unset CFLAGS CXXFLAGS FFLAGS LDFLAGS | ||
| make | ||
| %install | ||
| make install \ | ||
| SYSCONFIG_DIR=/var/adm/fillup-templates \ | ||
| DESTDIR=$RPM_BUILD_ROOT | ||
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| * To build xen and tools using a cross compiler: | ||
| ./configure --build=x86_64-unknown-linux-gnu --host=aarch64-linux-gnu | ||
| make XEN_TARGET_ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- | ||
| make XEN_TARGET_ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- \ | ||
| DESTDIR=/some/path install | ||
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| TODO | ||
| ==== | ||
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| - DESTDIR should be empty, not "/" | ||
| - add make uninstall targets | ||
| - replace private path variables as needed (SBINDIR/sbindir) | ||
| - ... | ||
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| # vim: tw=72 et |
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