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New package -- Smartfusion Cortex-M3 I2C driver package. [Bugzilla 1001291]
author vae
date Mon, 12 Mar 2012 20:52:32 +0000
parents 74dbf4c3f2e1
children
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1 dnl Process this file with autoconf to produce a configure script.
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2 dnl ====================================================================
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3 dnl
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4 dnl configure.in
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5 dnl
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6 dnl Top-level configure script for eCos software.
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7 dnl
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8 dnl ====================================================================
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9 dnl ####ECOSHOSTGPLCOPYRIGHTBEGIN####
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10 dnl -------------------------------------------
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11 dnl This file is part of the eCos host tools.
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12 dnl Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
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13 dnl
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14 dnl This program is free software; you can redistribute it and/or modify
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15 dnl it under the terms of the GNU General Public License as published by
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16 dnl the Free Software Foundation; either version 2 or (at your option) any
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17 dnl later version.
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18 dnl
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19 dnl This program is distributed in the hope that it will be useful, but
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20 dnl WITHOUT ANY WARRANTY; without even the implied warranty of
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21 dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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22 dnl General Public License for more details.
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23 dnl
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24 dnl You should have received a copy of the GNU General Public License
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25 dnl along with this program; if not, write to the
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26 dnl Free Software Foundation, Inc., 51 Franklin Street,
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27 dnl Fifth Floor, Boston, MA 02110-1301, USA.
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28 dnl -------------------------------------------
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29 dnl ####ECOSHOSTGPLCOPYRIGHTEND####
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30 dnl ====================================================================
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31 dnl#####DESCRIPTIONBEGIN####
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32 dnl
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33 dnl Author(s): bartv
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34 dnl Contact(s): bartv
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35 dnl Date: 1998/12/17
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36 dnl Version: 0.01
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37 dnl
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38 dnl####DESCRIPTIONEND####
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39 dnl ====================================================================
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40
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41 dnl eCos is a componentized architecture for deeply embedded systems.
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42 dnl It requires a very different configuration system from typical
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43 dnl autoconfiscated software such as the various GNU packages.
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44 dnl
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45 dnl The main eCos host-side software is autoconfiscated to some extent,
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46 dnl in that the usual sequence of "configure;make;make install" will
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47 dnl work under the right conditions. However it does not conform to
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48 dnl the GNU coding standards in numerous ways, for example "make dist"
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49 dnl will not work. The main eCos host-side software lives in the
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50 dnl "host" subdirectory, and is built unconditionally.
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51 dnl
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52 dnl The eCos target-side software lives in the "packages" subdirectory,
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53 dnl and is organized in numerous subdirectories corresponding to different
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54 dnl packages and potentially different versions of each package. In the
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55 dnl master repository managed by CVS there will only be one version of
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56 dnl each package, "current", which simplifies things somewhat. Other
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57 dnl repositories will not be quite so straightforward and require a
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58 dnl suitable administration tool.
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59 dnl
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60 dnl The various eCos packages are not currently auto-confiscated.
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61 dnl In particular building eCos requires the use of eCos configuration
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62 dnl technology, not autoconf - there is simply no good way of handling
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63 dnl a system as highly configurable as eCos using a few command-line
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64 dnl options passed to "configure". There would also be serious confusion
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65 dnl between host and target, especially when e.g. cross-compiling the
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66 dnl host tools. However a possible future enhancement
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67 dnl would involve making eCos releases via configure and make, thus
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68 dnl allowing for a release process that combines building the various
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69 dnl host-side tools such as gcc with creating eCos epk's for the various
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70 dnl packages.
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71 dnl
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72 dnl A complication is that some of the eCos target-side packages also
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73 dnl contain package-specific host-side support. For example the
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74 dnl Linux synthetic target support uses special host-side software
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75 dnl to provide I/O facilities: the architectural HAL package provdes
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76 dnl generic support, the synthetic ethernet package extends this
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77 dnl with ethernet support, and so on. Such package-specific host-side
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78 dnl software does not belong in the main host subdirectory, that
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79 dnl would make it very difficult to distribute new packages or
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80 dnl new versions of a package. However keeping the code with the
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81 dnl various packages makes building more complicated.
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82 dnl
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83 dnl 1) if the entire repository is managed by CVS or anoncvs, this
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84 dnl configure script will search the packages tree for any packages
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85 dnl that have host-side software that needs to be built -
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86 dnl specifically, that have a file "configure" inside a "host"
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87 dnl subdirectory in a version of a package.
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88 dnl
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89 dnl 2) if instead the repository contains additional packages
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90 dnl installed as epk's and managed by an administration tool then
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91 dnl it is the responsibility of that tool to let the users build
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92 dnl and rebuild the host-side software as required, for whichever
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93 dnl host platform or platforms are being used. In other words
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94 dnl it is the responsibility of the admin tool to create a
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95 dnl suitable build directory and run "configure; make; make install",
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96 dnl usually as part of the installation process. Note that several
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97 dnl versions of a package may be installed, and it is the
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98 dnl responsibility of each package to take this into account
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99 dnl (although the configure macros are aware of this to some extent,
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100 dnl and will e.g. generate suitable install directory names).
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101 dnl Also note that the top-level configure script will not pick
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102 dnl up such packages because they will be versioned, i.e. the
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103 dnl test for current/host/configure will fail because the
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104 dnl version will not be "current".
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105 dnl
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106 dnl 3) as a special case it may be desirable to ship pre-built binaries
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107 dnl of some of the package-specific software. It is not clear
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108 dnl just what would be the best way of shipping these - putting
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109 dnl them into the epk's would not be quite right because that would
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110 dnl make the epk's host-specific rather than generic.
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111 dnl
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112 dnl There is an unresolved problem with possible dependencies between
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113 dnl packages, if e.g. the host-side of the synthetic ethernet package could
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114 dnl only be built after the architectural synthetic target package.
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116 dnl Some of the eCos documentation is generic and lives in the "doc"
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117 dnl subdirectory. Other eCos documentation is package-specific and lives
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118 dnl in the appropriate package directory. At present there is no support
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119 dnl for building the documentation via configure and make, but such
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120 dnl support may be added in future.
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121 dnl
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122 dnl There is a subdirectory acsupport containing various files such
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123 dnl as config.guess and install.sh that are common. This also contains
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124 dnl an acinclude.m4 file with various macros that are useful for
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125 dnl eCos.
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126
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127 dnl Generic initialization.
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128 AC_INIT(acsupport/config.guess)
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129 AC_CONFIG_AUX_DIR(acsupport)
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130 AC_CANONICAL_HOST
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131 AM_INIT_AUTOMAKE(eCos,2.0,0)
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132 AM_MAINTAINER_MODE
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133
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134 dnl Detect attempts at cross-compilation. Usually this is the result
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135 dnl of somebody failing to read the documentation or the README.host
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136 dnl file.
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137 if test "${target_alias}x" != "x" ; then
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138 AC_MSG_ERROR("
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139 ================================================================
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140 You have specified a target ${target_alias}.
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141 This configure script is for building the eCos host-side support
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142 tools which are independent of the target architecture. It is not
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143 used for building eCos itself.
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144
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145 If your intention is to build eCos itself then you should first
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146 read the relevant documentation starting with the User's Guide.
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147
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148 If your intention is to rebuild the host-side support tools then
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149 there is no need to specify --target.
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150
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151 If your intention is to cross-compile the host-side support tools
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152 then you should be using --host instead of --target.
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153 ================================================================
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154 ")
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155 fi
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156
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157 dnl Make sure the source and build trees are kept separate.
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158 ECOS_CHECK_BUILD_ne_SRC
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159
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160 dnl Nothing actually gets built in this directory, so there should be no
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161 dnl need to worry about compiler flags etc. Instead, the problem is
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162 dnl figuring out what should actually get built.
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163 dnl
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164 dnl 1) the host subdirectory should always get built, if it exists.
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165 dnl With the 2.0 release system the directory gets moved to
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166 dnl tools/src
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167
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168 if test -f "${srcdir}/host/configure" ; then
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169 ecos_subdirs="host"
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170 elif test -f "${srcdir}/tools/src/configure" ; then
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171 ecos_subdirs="tools/src"
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172 else
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173 ecos_subdirs=""
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174 fi
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175
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176 dnl 2) any package which has a configure script in a
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177 dnl current/host subdirectory should also get built.
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178 dnl
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179 dnl Searching the directory tree is currently done by shell globbing.
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180 dnl Invoking "find" with suitable arguments might be quicker, but
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181 dnl less portable. On some hosts there may be problems with environmental
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182 dnl limits if too many packages provide host-side software.
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183 dnl
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184 dnl Currently there is no ordering of packages, so e.g. a device
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185 dnl driver's host-side support cannot depend on some HAL package
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186 dnl because the latter may not have been built and installed yet.
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187 dnl This is a good thing because packages are meant to be self-contained
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188 dnl whenever possible. Interaction between packages is typically handled
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189 dnl at the Tcl level at run-time, so there are no build-time complications.
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190
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191 AC_MSG_NOTICE([searching for configure scripts in eCos packages'
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192 host subdirectories. This operation can take a long time.
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193 If running on Windows and the eCos repository is accessed
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194 over a network then it may take some hours.])
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195 ecos_hostdirs=""
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196 ecos_configure_scripts="${srcdir}/packages/*/*/host/configure"
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197 ecos_configure_scripts="${ecos_configure_scripts} ${srcdir}/packages/*/*/*/host/configure"
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198 ecos_configure_scripts="${ecos_configure_scripts} ${srcdir}/packages/*/*/*/*/host/configure"
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199 ecos_configure_scripts="${ecos_configure_scripts} ${srcdir}/packages/*/*/*/*/*/host/configure"
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200 ecos_configure_scripts="${ecos_configure_scripts} ${srcdir}/packages/*/*/*/*/*/*/host/configure"
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201 for configure in ${ecos_configure_scripts}; do
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202 if test -f ${configure}; then
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203 dnl A configure script has been found in the source tree.
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204 dnl First turn it into a directory, then replace the absolute path
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205 dnl with a relative one.
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206 hostdir=`dirname ${configure}`
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207 hostdir=`echo ${hostdir} | sed -e "s:^${srcdir}/::"`
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208 ecos_hostdirs="${ecos_hostdirs} ${hostdir}"
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209 fi
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210 done
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211 AC_MSG_NOTICE([found configure scripts in
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212 ${ecos_hostdirs}])
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213 ecos_subdirs="${ecos_subdirs} ${ecos_hostdirs}"
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214
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215 dnl Because the eCos directory layout does not conform to GNU conventions
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216 dnl it is necessary to create various levels of intermediate directories.
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217 dnl This happens via config.status, prior to the recursion into the
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218 dnl appropriate directories.
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219 AC_OUTPUT_COMMANDS([${CONFIG_SHELL-/bin/sh} ${ac_top_srcdir}/acsupport/mkinstalldirs ${REQUIRED_DIRS}],REQUIRED_DIRS="${ecos_subdirs}")
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220
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221 dnl This causes warnings with current versions of configure which
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222 dnl want literal arguments. Since this script deliberately searches
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223 dnl for subdirectories there is no obvious way to eliminate those
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224 dnl warnings.
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225 AC_CONFIG_SUBDIRS(${ecos_subdirs})
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226 AC_OUTPUT(Makefile)