Annotation of xenocara/README, Revision 1.30
1.1 matthieu 1:
2: Notes on building Xenocara for OpenBSD X hackers
3:
4: This document presents some techniques that can be useful for people
5: wanting to hack the xenocara tree. It assumes some basic knowledge of
6: the OpenBSD build system, as described in the release(8) manual page.
7:
8: o About Xenocara
9: --------------
1.11 david 10: Xenocara is the name chosen for OpenBSD's version of X. It's
1.29 matthieu 11: currently based on X.Org 7.7 and its dependencies. The goal of
1.1 matthieu 12: Xenocara is to provide a framework to host local modifications and to
13: automate the build of the modular X.Org components, including 3rd
1.11 david 14: party packages and some software maintained by OpenBSD developers.
1.1 matthieu 15:
16: o Source tree
17: -----------
18:
19: The organisation of the xenocara directory follows the general
20: organisation used in X.Org:
21:
22: - app: X applications and utilities
23: - data: various data files (keyboard mappings and bitmaps)
24: - doc: documentation
25: - driver: input and video drivers
26: - font: fonts
27: - lib: libraries
28: - proto: X protocol headers
29: - util: utilities that don't fit anywhere else
1.24 matthieu 30: - xserver: the source for the X servers
1.1 matthieu 31:
32: In addition Xenocara uses the following directories:
33:
1.28 matthieu 34: - dist: contains some of the 3rd party sources, when keeping them
35: separate helps the build system (Mesa and xkeyboard-config)
1.1 matthieu 36: - distrib: all binary distribution related tools and data
37: - etc: mtree(8) data files
1.3 matthieu 38: - share: make(1) configuration for Xenocara
1.1 matthieu 39:
1.2 matthieu 40: At the top-level directory two files describe the individual
1.3 matthieu 41: components of Xenocara:
1.1 matthieu 42:
1.2 matthieu 43: - MODULES lists all X.Org components (imported from the X.Org
44: distribution at http://xorg.freedesktop.org/archive/)
1.3 matthieu 45: - 3RDPARTY lists all 3rd party software components provided in Xenocara,
1.2 matthieu 46: either as dependencies of the X.Org software, or as
47: complements to it to provide a more useable default
48: environment.
49:
50: o Compiling and installing
51: ------------------------
52:
1.25 matthieu 53: Xenocara is made up of almost three hundred different independent
54: packages that need to be built and installed in the right order,
55: especially while bootstrapping (while /usr/X11R6 is still empty). The
56: Xenocara Makefiles take care of that using the 'build' target.
1.2 matthieu 57:
1.5 matthieu 58: Quick startup guide
59:
60: The following steps will build and install everything for the first time.
61:
1.7 matthieu 62: cd xenocara
1.5 matthieu 63: make bootstrap
64: make obj
65: make build
66:
67: If you want to use another obj directory see below.
68:
1.2 matthieu 69: Requirements
70:
71: A freshly checked out xenocara tree is buildable without any external
1.23 matthieu 72: tool. Only the xenocara and the src (currently only the
1.24 matthieu 73: src/sys/dev/pci/pcidevs file) trees are needed.
1.23 matthieu 74:
75: However if you start modifying things in the automake build
1.2 matthieu 76: system used by many packages, you will need to have the following
1.3 matthieu 77: GNU autotools packages installed:
1.2 matthieu 78:
1.30 ! matthieu 79: - automake 1.12 (devel/automake/1.11)
! 80: - autoconf 2.68 (devel/autoconf/2.68)
! 81: - metaauto 0.9 (or later) (devel/metaauto)
1.28 matthieu 82: - libtool 2.4.2 (or later) (devel/libtool)
1.2 matthieu 83:
1.17 matthieu 84: If you have your source tree on an NFS partition, make sure the clock
1.23 matthieu 85: of your server and client are properly synchronised. Any significant
86: drift will cause various problems during builds.
1.17 matthieu 87:
1.8 matthieu 88: Path
89:
1.24 matthieu 90: To build Xenocara, you need to have /usr/X11R6/bin in your PATH.
1.8 matthieu 91:
1.2 matthieu 92: Sudo
93:
94: If the SUDO variable points to your sudo(8) binary in /etc/mk.conf,
95: 'make build' can be run as a normal user. It will raise its privileges
96: whenever needed with sudo. Otherwise, you need to run make build as
97: root.
98:
1.3 matthieu 99: If you have installed the full Xenocara X sets on your system, you
100: don't need to build all of Xenocara to patch one element. You can go
1.24 matthieu 101: to any module sub-directory and run 'make build' from there.
1.2 matthieu 102:
1.8 matthieu 103: Source directory
104:
105: The variable XSRCDIR can be set either in the environment or in
1.9 matthieu 106: /etc/mk.conf to point to the xenocara source tree, in case you keep it
1.21 matthieu 107: in a non-standard directory (the default is /usr/xenocara).
1.8 matthieu 108:
1.2 matthieu 109: Objdirs
110:
111: Xenocara supports objdirs (and it's even the recommended way to build
112: things). Just run 'make obj' at any level before 'make build' to make
1.24 matthieu 113: sure that the object directories are created.
114: XOBJDIR defines the obj directory that is used (defaults to /usr/xobj).
1.13 matthieu 115: It should be created before running 'make obj'.
1.2 matthieu 116:
117: o Regenerating configure scripts
118: ------------------------------
119:
120: Whenever you touched an import file for GNU autotools (Makefile.am,
121: configure.ac mostly), you need to rebuild the configure script and
1.24 matthieu 122: makefiles skeletons. For that use the following command in the
1.14 matthieu 123: directory where you edited the autotools source files:
1.2 matthieu 124:
125: env XENOCARA_RERUN_AUTOCONF=Yes make -f Makefile.bsd-wrapper build
126:
1.24 matthieu 127: You can also set XENOCARA_RERUN_AUTOCONF in /etc/mk.conf or in the
128: environment to force the regeneration of configure scripts
1.14 matthieu 129: in every component during a make build.
1.2 matthieu 130:
1.15 matthieu 131: o Cleaning in packages managed by autotools
132: -----------------------------------------
133:
134: One common problem when building xenocara is the case where the obj
135: directory didn't exist (or the symbolic link pointed to a non-existent
1.24 matthieu 136: directory) when the source was first built. After fixing this problem,
137: 'configure' will refuse to work in the obj dir, because the source
138: is already configured.
1.15 matthieu 139:
140: To recover from this in one package:
141:
142: rm -f obj
143: make -f Makefile.bsd-wrapper cleandir
144: mkdir XOBJDIR
145: make -f Makefile.bsd-wrapper obj
146: make -f Makefile.bsd-wrapper build
147:
148: or from the root of the xenocara tree:
149:
1.24 matthieu 150: find . -type l -name obj | xargs rm -f
1.15 matthieu 151: make cleandir
152: mkdir XOBJDIR
153: make obj
154: make build
155:
1.16 matthieu 156: for more desperate cases, remove all files from XSRCDIR not in CVS:
1.15 matthieu 157:
158: cd XSRCDIR
159: cvs -q update -PAd -I - | awk '$1=="?" {print $2}' | xargs rm -f
160:
1.19 matthieu 161: o How to build something with debug information?
162: ----------------------------------------------
163:
164: You can use "env CFLAGS=-g make -f Makefile.bsd-wrapper build" to
165: build any module with debugging information, but you'll need to remove
166: XOBJDIR/xorg-config.cache.${MACHINE} before doing that because
167: autoconf caches the value of CFLAGS in its cache.
168:
169: o How to get a core file out of the X server?
170: -------------------------------------------
171:
172: Several things are needed:
173:
174: 1) set kern.nosuidcoredump=2 in /etc/sysctl.conf
1.24 matthieu 175: 2) put
1.19 matthieu 176:
177: Option "NoTrapSignals" "true"
178:
1.24 matthieu 179: in the "ServerFlags" section of /etc/X11/xorg.conf. If such a section
1.19 matthieu 180: doesn't exist, it can be added as follow:
181:
182: Section "ServerFlags"
183: Option "NoTrapSignals" "true"
184: EndSection
185:
1.24 matthieu 186: anywhere in the configuration file.
1.19 matthieu 187:
188: 3) start the X server as root, with the -keepPriv option. A regular
189: user is not allowed to use this option. If you use xdm, you can add
190: the option in /etc/X11/xdm/Xservers. If you want to use startx, you
191: need to run it as root, like this:
192:
193: startx -- /usr/X11R6/bin/X -keepPriv
194:
195: Now the X server will dump core when catching a fatal signal. But it
196: will also not be able to restore the text mode on exit. So be prepared
197: to log in remotely (serial terminal or ssh) to reboot your machine or
198: to restart X.
199:
200: The core dump will be in /var/crash.
201:
202: See also <http://xorg.freedesktop.org/wiki/Development/Documentation/ServerDebugging>
203:
1.15 matthieu 204: --
1.30 ! matthieu 205: $OpenBSD: README,v 1.29 2012/07/23 05:50:37 matthieu Exp $
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