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comparison configure.in @ 283:f58bc1b2c2bc

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Reorganization of the host-side autoconfiscation support, and a couple of minor bug fixes. The main goal is to support per-package host-side software in addition to the generic host-side tools. For example, the synthetic target HAL and device driver packages can now have host subdirectories with support code.
author bartv
date Sun, 11 Aug 2002 21:40:50 +0000
parents e0c0827131d1
children d6a1854fdc1b
comparison
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282:a29ee6c2dd3c 283:f58bc1b2c2bc
1 dnl Process this file with autoconf to produce a configure script. 1 dnl Process this file with autoconf to produce a configure script.
2 dnl ==================================================================== 2 dnl ====================================================================
3 dnl 3 dnl
4 dnl configure.in 4 dnl configure.in
5 dnl 5 dnl
6 dnl Top-level configure script for eCos host-side software. 6 dnl Top-level configure script for eCos software.
7 dnl 7 dnl
8 dnl ==================================================================== 8 dnl ====================================================================
9 dnl ####ECOSGPLCOPYRIGHTBEGIN#### 9 dnl ####ECOSHOSTGPLCOPYRIGHTBEGIN####
10 dnl ------------------------------------------- 10 dnl ----------------------------------------------------------------------------
11 dnl This file is part of eCos, the Embedded Configurable Operating System. 11 dnl Copyright (C) 2002 Bart Veer
12 dnl Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc. 12 dnl Copyright (C) 1998, 1999, 2000, 2001 Red Hat, Inc.
13 dnl 13 dnl
14 dnl eCos is free software; you can redistribute it and/or modify it under 14 dnl This file is part of the eCos host tools.
15 dnl the terms of the GNU General Public License as published by the Free
16 dnl Software Foundation; either version 2 or (at your option) any later version.
17 dnl 15 dnl
18 dnl eCos is distributed in the hope that it will be useful, but WITHOUT ANY 16 dnl This program is free software; you can redistribute it and/or modify it
19 dnl WARRANTY; without even the implied warranty of MERCHANTABILITY or 17 dnl under the terms of the GNU General Public License as published by the Free
20 dnl FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 18 dnl Software Foundation; either version 2 of the License, or (at your option)
21 dnl for more details. 19 dnl any later version.
22 dnl 20 dnl
23 dnl You should have received a copy of the GNU General Public License along 21 dnl This program is distributed in the hope that it will be useful, but WITHOUT
24 dnl with eCos; if not, write to the Free Software Foundation, Inc., 22 dnl ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
25 dnl 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. 23 dnl FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
26 dnl 24 dnl more details.
27 dnl As a special exception, if other files instantiate templates or use macros 25 dnl
28 dnl or inline functions from this file, or you compile this file and link it 26 dnl You should have received a copy of the GNU General Public License along with
29 dnl with other works to produce a work based on this file, this file does not 27 dnl this program; if not, write to the Free Software Foundation, Inc.,
30 dnl by itself cause the resulting work to be covered by the GNU General Public 28 dnl 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
31 dnl License. However the source code for this file must still be made available 29 dnl ----------------------------------------------------------------------------
32 dnl in accordance with section (3) of the GNU General Public License. 30 dnl ####ECOSHOSTGPLCOPYRIGHTEND####
33 dnl
34 dnl This exception does not invalidate any other reasons why a work based on
35 dnl this file might be covered by the GNU General Public License.
36 dnl
37 dnl Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
38 dnl at http://sources.redhat.com/ecos/ecos-license
39 dnl -------------------------------------------
40 dnl ####ECOSGPLCOPYRIGHTEND####
41 dnl ==================================================================== 31 dnl ====================================================================
42 dnl#####DESCRIPTIONBEGIN#### 32 dnl#####DESCRIPTIONBEGIN####
43 dnl 33 dnl
44 dnl Author(s): bartv 34 dnl Author(s): bartv
45 dnl Contact(s): bartv 35 dnl Contact(s): bartv
47 dnl Version: 0.01 37 dnl Version: 0.01
48 dnl 38 dnl
49 dnl####DESCRIPTIONEND#### 39 dnl####DESCRIPTIONEND####
50 dnl ==================================================================== 40 dnl ====================================================================
51 41
52 dnl For now the only work done via configure/make/make install is the 42 dnl eCos is a componentized architecture for deeply embedded systems.
53 dnl host-side libs and tools. At some point this work may be extended 43 dnl It requires a very different configuration system from typical
54 dnl to process the generic (non-package) documentation, and possibly 44 dnl autoconfiscated software such as the various GNU packages.
55 dnl to make releases of the target-side.
56 dnl 45 dnl
57 dnl The support files are all kept in the host sub-directory, allowing 46 dnl The main eCos host-side software is autoconfiscated to some extent,
58 dnl that to be distributed as a coherent set of sources. 47 dnl in that the usual sequence of "configure;make;make install" will
48 dnl work under the right conditions. However it does not conform to
49 dnl the GNU coding standards in numerous ways, for example "make dist"
50 dnl will not work. The main eCos host-side software lives in the
51 dnl "host" subdirectory, and is built unconditionally.
52 dnl
53 dnl The eCos target-side software lives in the "packages" subdirectory,
54 dnl and is organized in numerous subdirectories corresponding to different
55 dnl packages and potentially different versions of each package. In the
56 dnl master repository managed by CVS there will only be one version of
57 dnl each package, "current", which simplifies things somewhat. Other
58 dnl repositories will not be quite so straightforward and require a
59 dnl suitable administration tool.
60 dnl
61 dnl The various eCos packages are not currently auto-confiscated.
62 dnl In particular building eCos requires the use of eCos configuration
63 dnl technology, not autoconf - there is simply no good way of handling
64 dnl a system as highly configurable as eCos using a few command-line
65 dnl options passed to "configure". There would also be serious confusion
66 dnl between host and target, especially when e.g. cross-compiling the
67 dnl host tools. However a possible future enhancement
68 dnl would involve making eCos releases via configure and make, thus
69 dnl allowing for a release process that combines building the various
70 dnl host-side tools such as gcc with creating eCos epk's for the various
71 dnl packages.
72 dnl
73 dnl A complication is that some of the eCos target-side packages also
74 dnl contain package-specific host-side support. For example the
75 dnl Linux synthetic target support uses special host-side software
76 dnl to provide I/O facilities: the architectural HAL package provdes
77 dnl generic support, the synthetic ethernet package extends this
78 dnl with ethernet support, and so on. Such package-specific host-side
79 dnl software does not belong in the main host subdirectory, that
80 dnl would make it very difficult to distribute new packages or
81 dnl new versions of a package. However keeping the code with the
82 dnl various packages makes building more complicated.
83 dnl
84 dnl 1) if the entire repository is managed by CVS or anoncvs, this
85 dnl configure script will search the packages tree for any packages
86 dnl that have host-side software that needs to be built -
87 dnl specifically, that have a file "configure" inside a "host"
88 dnl subdirectory in version "current" of a package.
89 dnl
90 dnl 2) if instead the repository contains additional packages
91 dnl installed as epk's and managed by an administration tool then
92 dnl it is the responsibility of that tool to let the users build
93 dnl and rebuild the host-side software as required, for whichever
94 dnl host platform or platforms are being used. In other words
95 dnl it is the responsibility of the admin tool to create a
96 dnl suitable build directory and run "configure; make; make install",
97 dnl usually as part of the installation process. Note that several
98 dnl versions of a package may be installed, and it is the
99 dnl responsibility of each package to take this into account
100 dnl (although the configure macros are aware of this to some extent,
101 dnl and will e.g. generate suitable install directory names).
102 dnl Also note that the top-level configure script will not pick
103 dnl up such packages because they will be versioned, i.e. the
104 dnl test for current/host/configure will fail because the
105 dnl version will not be "current".
106 dnl
107 dnl 3) as a special case it may be desirable to ship pre-built binaries
108 dnl of some of the package-specific software. It is not clear
109 dnl just what would be the best way of shipping these - putting
110 dnl them into the epk's would not be quite right because that would
111 dnl make the epk's host-specific rather than generic.
112 dnl
113 dnl There is an unresolved problem with possible dependencies between
114 dnl packages, if e.g. the host-side of the synthetic ethernet package could
115 dnl only be built after the architectural synthetic target package.
59 116
60 AC_INIT(host/COPYING) 117 dnl Some of the eCos documentation is generic and lives in the "doc"
61 AC_CONFIG_AUX_DIR(host) 118 dnl subdirectory. Other eCos documentation is package-specific and lives
119 dnl in the appropriate package directory. At present there is no support
120 dnl for building the documentation via configure and make, but such
121 dnl support may be added in future.
122 dnl
123 dnl There is a subdirectory acsupport containing various files such
124 dnl as config.guess and install.sh that are common. This also contains
125 dnl an acinclude.m4 file with various macros that are useful for
126 dnl eCos.
127
128 dnl Generic initialization.
129 AC_INIT(acsupport/config.guess)
130 AC_CONFIG_AUX_DIR(acsupport)
62 AC_CANONICAL_HOST 131 AC_CANONICAL_HOST
63 AM_INIT_AUTOMAKE(eCos,2.0,0) 132 AM_INIT_AUTOMAKE(eCos,2.0,0)
64 AM_MAINTAINER_MODE 133 AM_MAINTAINER_MODE
134 ECOS_CHECK_BUILD_ne_SRC
65 135
66 dnl The automake options include cygnus, so AC_EXEEXT is required and 136 dnl Nothing actually gets built in this directory, so there should be no
67 dnl hence it is a good idea to include all of the compiler-selection 137 dnl need to worry about compiler flags etc. Instead, the problem is
68 dnl tests. 138 dnl figuring out what should actually get built.
69 AC_PROG_MAKE_SET 139 dnl
70 AC_PROG_CC 140 dnl 1) the host subdirectory should always get built.
71 AC_PROG_CXX 141 SUBDIRS="host"
72 AC_OBJEXT
73 AC_EXEEXT
74 142
75 AC_CONFIG_SUBDIRS(host) 143 dnl 2) any package which has a configure script in a
144 dnl current/host subdirectory should also get built.
145 dnl
146 dnl Searching the directory tree is currently done by shell globbing.
147 dnl Invoking "find" with suitable arguments might be quicker, but
148 dnl less portable. On some hosts there may be problems with environmental
149 dnl limits if too many packages provide host-side software.
150 dnl
151 dnl Currently there is no ordering of packages, so e.g. a device
152 dnl driver's host-side support cannot depend on some HAL package
153 dnl because the latter may not have been built and installed yet.
154 dnl This is a good thing because packages are meant to be self-contained
155 dnl whenever possible. Interaction between packages is typically handled
156 dnl at the Tcl level at run-time, so there are no build-time complications.
157
158 PKGHOSTDIRS=""
159 FOUND_CONFIGURES=""
160 FOUND_CONFIGURES="${FOUND_CONFIGURES} ${srcdir}/packages/*/current/host/configure"
161 FOUND_CONFIGURES="${FOUND_CONFIGURES} ${srcdir}/packages/*/*/current/host/configure"
162 FOUND_CONFIGURES="${FOUND_CONFIGURES} ${srcdir}/packages/*/*/*/current/host/configure"
163 FOUND_CONFIGURES="${FOUND_CONFIGURES} ${srcdir}/packages/*/*/*/*/current/host/configure"
164 FOUND_CONFIGURES="${FOUND_CONFIGURES} ${srcdir}/packages/*/*/*/*/*/current/host/configure"
165 for configure in ${FOUND_CONFIGURES}; do
166 if test -f ${configure}; then
167 dnl A configure script has been found in the source tree.
168 dnl First turn it into a directory, then replace the absolute path
169 dnl with a relative one.
170 hostdir=`dirname ${configure}`
171 hostdir=`echo ${hostdir} | sed -e "s:^${srcdir}/::"`
172 PKGHOSTDIRS="${PKGHOSTDIRS} ${hostdir}"
173 fi
174 done
175
176 SUBDIRS="${SUBDIRS} ${PKGHOSTDIRS}"
177
178 dnl Because the eCos directory layout does not conform to GNU conventions
179 dnl it is necessary to create various levels of intermediate directories.
180 dnl This happens via config.status, prior to the recursion into the
181 dnl appropriate directories.
182 AC_OUTPUT_COMMANDS([${CONFIG_SHELL-/bin/sh} ${top_srcdir}/acsupport/mkinstalldirs ${REQUIRED_DIRS}],REQUIRED_DIRS="${SUBDIRS}")
183
184 AC_SUBST(SUBDIRS)
185 AC_CONFIG_SUBDIRS(${SUBDIRS})
76 AC_OUTPUT(Makefile) 186 AC_OUTPUT(Makefile)