1 | .. comment SPDX-License-Identifier: CC-BY-SA-4.0 |
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2 | |
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3 | .. comment: Copyright (c) 2016 Chris Johns <chrisj@rtems.org> |
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4 | .. comment: All rights reserved. |
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5 | |
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6 | .. _rtems-kernel: |
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7 | |
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8 | RTEMS Kernel |
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9 | ------------ |
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10 | |
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11 | RTEMS is an open source real-time operating system. As a user you have access |
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12 | to all the source code. The ``RTEMS Kernel`` section will show you how you |
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13 | build the RTEMS kernel on your host. |
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14 | |
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15 | Development Sources |
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16 | ~~~~~~~~~~~~~~~~~~~ |
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17 | |
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18 | Create a new location to build the RTEMS kernel: |
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19 | |
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20 | .. code-block:: shell |
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21 | |
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22 | $ cd |
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23 | $ cd development/rtems |
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24 | $ mkdir kernel |
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25 | $ cd kernel |
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26 | |
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27 | Clone the RTEMS respository: |
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28 | |
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29 | .. code-block:: shell |
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30 | |
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31 | $ git clone git://git.rtems.org/rtems.git rtems |
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32 | Cloning into 'rtems'... |
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33 | remote: Counting objects: 483342, done. |
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34 | remote: Compressing objects: 100% (88974/88974), done. |
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35 | remote: Total 483342 (delta 390053), reused 475669 (delta 383809) |
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36 | Receiving objects: 100% (483342/483342), 69.88 MiB | 1.37 MiB/s, done. |
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37 | Resolving deltas: 100% (390053/390053), done. |
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38 | Checking connectivity... done. |
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39 | |
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40 | Tools Path Set Up |
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41 | ~~~~~~~~~~~~~~~~~ |
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42 | |
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43 | We need to set our path to include the RTEMS tools we built in the previous |
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44 | section. The RTEMS tools needs to be first in your path because RTEMS provides |
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45 | specific versions of the ``autoconf`` and ``automake`` tools. We want to use |
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46 | the RTEMS version and not your host's versions: |
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47 | |
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48 | .. code-block:: shell |
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49 | |
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50 | $ export PATH=$HOME/development/rtems/4.12/bin:$PATH |
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51 | |
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52 | .. _bootstrapping: |
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53 | |
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54 | Bootstrapping |
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55 | ~~~~~~~~~~~~~ |
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56 | |
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57 | The developers version of the code from git requires we ``bootstrap`` the |
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58 | source code. This is an ``autoconf`` and ``automake`` bootstrap to create the |
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59 | various files generated by ``autoconf`` and ``automake``. RTEMS does not keep |
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60 | these generated files under version control. The bootstrap process is slow so |
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61 | to speed it up the RSB provides a command that can perform the bootstrap in |
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62 | parallel using your available cores. We need to enter the cloned source |
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63 | directory then run the bootsrap commands: |
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64 | |
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65 | .. code-block:: shell |
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66 | |
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67 | $ cd rtems |
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68 | $ ./bootstrap -c && ./bootstrap -p && \ |
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69 | $HOME/development/rtems/rsb/source-builder/sb-bootstrap |
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70 | removing automake generated Makefile.in files |
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71 | removing configure files |
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72 | removing aclocal.m4 files |
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73 | Generating ./cpukit/dtc/libfdt/preinstall.am |
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74 | Generating ./cpukit/zlib/preinstall.am |
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75 | Generating ./cpukit/libdl/preinstall.am |
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76 | Generating ./cpukit/posix/preinstall.am |
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77 | Generating ./cpukit/pppd/preinstall.am |
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78 | Generating ./cpukit/librpc/preinstall.am |
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79 | Generating ./cpukit/preinstall.am |
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80 | Generating ./cpukit/sapi/preinstall.am |
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81 | Generating ./cpukit/score/preinstall.am |
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82 | Generating ./cpukit/score/cpu/mips/preinstall.am |
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83 | Generating ./cpukit/score/cpu/sh/preinstall.am |
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84 | Generating ./cpukit/score/cpu/sparc/preinstall.am |
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85 | Generating ./cpukit/score/cpu/no_cpu/preinstall.am |
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86 | Generating ./cpukit/score/cpu/arm/preinstall.am |
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87 | Generating ./cpukit/score/cpu/m32c/preinstall.am |
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88 | Generating ./cpukit/score/cpu/moxie/preinstall.am |
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89 | Generating ./cpukit/score/cpu/v850/preinstall.am |
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90 | Generating ./cpukit/score/cpu/sparc64/preinstall.am |
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91 | Generating ./cpukit/score/cpu/or1k/preinstall.am |
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92 | Generating ./cpukit/score/cpu/i386/preinstall.am |
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93 | Generating ./cpukit/score/cpu/nios2/preinstall.am |
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94 | Generating ./cpukit/score/cpu/epiphany/preinstall.am |
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95 | Generating ./cpukit/score/cpu/m68k/preinstall.am |
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96 | Generating ./cpukit/score/cpu/lm32/preinstall.am |
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97 | Generating ./cpukit/score/cpu/powerpc/preinstall.am |
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98 | Generating ./cpukit/score/cpu/bfin/preinstall.am |
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99 | Generating ./cpukit/libpci/preinstall.am |
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100 | Generating ./cpukit/libcrypt/preinstall.am |
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101 | Generating ./cpukit/rtems/preinstall.am |
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102 | Generating ./cpukit/telnetd/preinstall.am |
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103 | Generating ./cpukit/libnetworking/preinstall.a |
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104 | ...... |
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105 | Generating ./c/src/lib/libbsp/powerpc/gen5200/preinstall.am |
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106 | Generating ./c/src/lib/libbsp/powerpc/mpc55xxevb/preinstall.am |
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107 | Generating ./c/src/lib/libbsp/bfin/TLL6527M/preinstall.am |
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108 | Generating ./c/src/lib/libbsp/bfin/bf537Stamp/preinstall.am |
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109 | Generating ./c/src/lib/libbsp/bfin/eZKit533/preinstall.am |
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110 | Generating ./c/src/librtems++/preinstall.am |
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111 | Generating ./c/src/libchip/preinstall.am |
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112 | Generating ./c/src/wrapup/preinstall.am |
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113 | Generating ./c/src/ada/preinstall.am |
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114 | RTEMS Source Builder - RTEMS Bootstrap, 4.12 (e645642255cc modified) |
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115 | 1/139: autoreconf: configure.ac |
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116 | 2/139: autoreconf: cpukit/configure.ac |
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117 | 3/139: autoreconf: tools/cpu/configure.ac |
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118 | 4/139: autoreconf: tools/cpu/generic/configure.ac |
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119 | 5/139: autoreconf: tools/cpu/sh/configure.ac |
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120 | 6/139: autoreconf: tools/cpu/nios2/configure.ac |
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121 | 7/139: autoreconf: tools/build/configure.ac |
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122 | 8/139: autoreconf: doc/configure.ac |
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123 | ...... |
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124 | 124/139: autoreconf: c/src/make/configure.ac |
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125 | 125/139: autoreconf: c/src/librtems++/configure.ac |
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126 | 126/139: autoreconf: c/src/ada-tests/configure.ac |
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127 | 127/139: autoreconf: testsuites/configure.ac |
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128 | 128/139: autoreconf: testsuites/libtests/configure.ac |
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129 | 129/139: autoreconf: testsuites/mptests/configure.ac |
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130 | 130/139: autoreconf: testsuites/fstests/configure.ac |
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131 | 131/139: autoreconf: testsuites/sptests/configure.ac |
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132 | 132/139: autoreconf: testsuites/tmtests/configure.ac |
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133 | 133/139: autoreconf: testsuites/smptests/configure.ac |
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134 | 134/139: autoreconf: testsuites/tools/configure.ac |
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135 | 135/139: autoreconf: testsuites/tools/generic/configure.ac |
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136 | 136/139: autoreconf: testsuites/psxtests/configure.ac |
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137 | 137/139: autoreconf: testsuites/psxtmtests/configure.ac |
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138 | 138/139: autoreconf: testsuites/rhealstone/configure.ac |
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139 | 139/139: autoreconf: testsuites/samples/configure.ac |
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140 | Bootstrap time: 0:02:47.398824 |
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141 | |
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142 | Building a BSP |
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143 | ~~~~~~~~~~~~~~ |
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144 | |
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145 | We build RTEMS in a directory outside of the source tree we have just cloned |
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146 | and ``bootstrapped``. You cannot build RTEMS while in the source tree. Lets |
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147 | create a suitable directory using the name of the BSP we are going to build: |
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148 | |
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149 | .. code-block:: shell |
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150 | |
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151 | $ cd .. |
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152 | $ mkdir erc32 |
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153 | $ cd erc32 |
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154 | |
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155 | Configure RTEMS using the ``configure`` command. We use a full path to |
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156 | ``configure`` so the object files built contain the absolute path of the source |
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157 | files. If you are source level debugging you will be able to access the source |
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158 | code to RTEMS from the debugger. We will build for the ``erc32`` BSP with POSIX |
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159 | enabled and the networking stack disabled: |
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160 | |
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161 | .. code-block:: shell |
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162 | |
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163 | $ $HOME/development/rtems/kernel/rtems/configure --prefix=$HOME/development/rtems/4.12 \ |
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164 | --target=sparc-rtems4.12 --enable-rtemsbsp=erc32 --enable-posix \ |
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165 | --disable-networking |
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166 | checking for gmake... no |
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167 | checking for make... make |
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168 | checking for RTEMS Version... 4.11.99.0 |
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169 | checking build system type... x86_64-pc-linux-gnu |
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170 | checking host system type... x86_64-pc-linux-gnu |
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171 | checking target system type... sparc-unknown-rtems4.12 |
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172 | checking for a BSD-compatible install... /usr/bin/install -c |
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173 | checking whether build environment is sane... yes |
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174 | checking for a thread-safe mkdir -p... /bin/mkdir -p |
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175 | checking for gawk... no |
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176 | checking for mawk... mawk |
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177 | checking whether make sets $(MAKE)... yes |
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178 | checking whether to enable maintainer-specific portions of Makefiles... no |
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179 | checking that generated files are newer than configure... done |
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180 | ...... |
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181 | checking target system type... sparc-unknown-rtems4.12 |
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182 | checking rtems target cpu... sparc |
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183 | checking for a BSD-compatible install... /usr/bin/install -c |
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184 | checking whether build environment is sane... yes |
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185 | checking for sparc-rtems4.12-strip... sparc-rtems4.12-strip |
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186 | checking for a thread-safe mkdir -p... /bin/mkdir -p |
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187 | checking for gawk... no |
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188 | checking for mawk... mawk |
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189 | checking whether make sets $(MAKE)... yes |
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190 | checking whether to enable maintainer-specific portions of Makefiles... no |
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191 | checking that generated files are newer than configure... done |
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192 | configure: creating ./config.status |
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193 | config.status: creating Makefile |
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194 | |
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195 | target architecture: sparc. |
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196 | available BSPs: erc32. |
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197 | 'make all' will build the following BSPs: erc32. |
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198 | other BSPs can be built with 'make RTEMS_BSP="bsp1 bsp2 ..."' |
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199 | |
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200 | config.status: creating Makefile |
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201 | |
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202 | Build RTEMS using two cores: |
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203 | |
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204 | .. code-block:: shell |
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205 | |
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206 | $ make -j 2 |
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207 | Making all in tools/build |
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208 | make[1]: Entering directory '/home/chris/development/rtems/kernel/erc32/tools/build' |
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209 | make all-am |
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210 | make[2]: Entering directory '/home/chris/development/rtems/kernel/erc32/tools/build' |
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211 | gcc -DHAVE_CONFIG_H -I. -I/home/chris/development/rtems/kernel/rtems/tools/build -g -O2 -MT cklength.o -MD -MP -MF .deps/cklength.Tpo -c -o cklength.o /home/chris/development/rtems/kernel/rtems/tools/build/cklength.c |
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212 | gcc -DHAVE_CONFIG_H -I. -I/home/chris/development/rtems/kernel/rtems/tools/build -g -O2 -MT eolstrip.o -MD -MP -MF .deps/eolstrip.Tpo -c -o eolstrip.o /home/chris/development/rtems/kernel/rtems/tools/build/eolstrip.c |
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213 | mv -f .deps/cklength.Tpo .deps/cklength.Po |
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214 | mv -f .deps/eolstrip.Tpo .deps/eolstrip.Po |
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215 | gcc -DHAVE_CONFIG_H -I. -I/home/chris/development/rtems/kernel/rtems/tools/build -g -O2 -MT compat.o -MD -MP -MF .deps/compat.Tpo -c -o compat.o /home/chris/development/rtems/kernel/rtems/tools/build/compat.c |
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216 | gcc -DHAVE_CONFIG_H -I. -I/home/chris/development/rtems/kernel/rtems/tools/build -g -O2 -MT packhex.o -MD -MP -MF .deps/packhex.Tpo -c -o packhex.o /home/chris/development/rtems/kernel/rtems/tools/build/packhex.c |
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217 | mv -f .deps/compat.Tpo .deps/compat.Po |
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218 | gcc -DHAVE_CONFIG_H -I. -I/home/chris/development/rtems/kernel/rtems/tools/build -g -O2 -MT unhex.o -MD -MP -MF .deps/unhex.Tpo -c -o unhex.o /home/chris/development/rtems/kernel/rtems/tools/build/unhex.c |
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219 | mv -f .deps/packhex.Tpo .deps/packhex.Po |
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220 | gcc -DHAVE_CONFIG_H -I. -I/home/chris/development/rtems/kernel/rtems/tools/build -g -O2 -MT rtems-bin2c.o -MD -MP -MF .deps/rtems-bin2c.Tpo -c -o rtems-bin2c.o /home/chris/development/rtems/kernel/rtems/tools/build/rtems-bin2c.c |
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221 | mv -f .deps/unhex.Tpo .deps/unhex.Po |
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222 | gcc -DHAVE_CONFIG_H -I. -I/home/chris/development/rtems/kernel/rtems/tools/build -g -O2 -MT binpatch.o -MD -MP -MF .deps/binpatch.Tpo -c -o binpatch.o /home/chris/development/rtems/kernel/rtems/tools/build/binpatch.c |
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223 | mv -f .deps/rtems-bin2c.Tpo .deps/rtems-bin2c.Po |
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224 | gcc -g -O2 -o cklength cklength.o |
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225 | mv -f .deps/binpatch.Tpo .deps/binpatch.Po |
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226 | gcc -g -O2 -o eolstrip eolstrip.o compat.o |
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227 | gcc -g -O2 -o packhex packhex.o |
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228 | gcc -g -O2 -o rtems-bin2c rtems-bin2c.o compat.o |
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229 | gcc -g -O2 -o unhex unhex.o compat.o |
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230 | gcc -g -O2 -o binpatch binpatch.o |
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231 | make[2]: Leaving directory '/home/chris/development/rtems/kernel/erc32/tools/build' |
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232 | make[1]: Leaving directory '/home/chris/development/rtems/kernel/erc32/tools/build' |
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233 | Making all in tools/cpu |
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234 | make[1]: Entering directory '/home/chris/development/rtems/kernel/erc32/tools/cpu' |
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235 | Making all in generic |
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236 | make[2]: Entering directory '/home/chris/development/rtems/kernel/erc32/tools/cpu/generic' |
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237 | make[2]: Nothing to be done for 'all'. |
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238 | make[2]: Leaving directory '/home/chris/development/rtems/kernel/erc32/tools/cpu/generic' |
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239 | make[2]: Entering directory '/home/chris/development/rtems/kernel/erc32/tools/cpu' |
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240 | make[2]: Nothing to be done for 'all-am'. |
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241 | make[2]: Leaving directory '/home/chris/development/rtems/kernel/erc32/tools/cpu' |
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242 | make[1]: Leaving directory '/home/chris/development/rtems/kernel/erc32/tools/cpu' |
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243 | Making all in testsuites/tools |
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244 | make[1]: Entering directory '/home/chris/development/rtems/kernel/erc32/testsuites/tools' |
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245 | Making all in generic |
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246 | make[2]: Entering directory '/home/chris/development/rtems/kernel/erc32/testsuites/tools/generic' |
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247 | make[2]: Nothing to be done for 'all'. |
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248 | make[2]: Leaving directory '/home/chris/development/rtems/kernel/erc32/testsuites/tools/generic' |
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249 | make[2]: Entering directory '/home/chris/development/rtems/kernel/erc32/testsuites/tools' |
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250 | make[2]: Nothing to be done for 'all-am'. |
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251 | make[2]: Leaving directory '/home/chris/development/rtems/kernel/erc32/testsuites/tools' |
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252 | make[1]: Leaving directory '/home/chris/development/rtems/kernel/erc32/testsuites/tools' |
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253 | Making all in sparc-rtems4.12/c |
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254 | make[1]: Entering directory '/home/chris/development/rtems/kernel/erc32/sparc-rtems4.12/c' |
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255 | Making all in . |
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256 | make[2]: Entering directory '/home/chris/development/rtems/kernel/erc32/sparc-rtems4.12/c' |
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257 | Configuring RTEMS_BSP=erc32 |
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258 | checking for gmake... no |
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259 | checking for make... make |
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260 | checking build system type... x86_64-pc-linux-gnu |
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261 | checking host system type... sparc-unknown-rtems4.12 |
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262 | ...... |
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263 | sparc-rtems4.12-gcc -B../../../../../erc32/lib/ -specs bsp_specs -qrtems -DHAVE_CONFIG_H -I. -I/home/chris/development/rtems/kernel/rtems/c/src/../../testsuites/samples/nsecs -I.. -I/home/chris/development/rtems/kernel/rtems/c/src/../../testsuites/samples/../support/include -mcpu=cypress -O2 -g -ffunction-sections -fdata-sections -Wall -Wmissing-prototypes -Wimplicit-function-declaration -Wstrict-prototypes -Wnested-externs -MT init.o -MD -MP -MF .deps/init.Tpo -c -o init.o /home/chris/development/rtems/kernel/rtems/c/src/../../testsuites/samples/nsecs/init.c |
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264 | sparc-rtems4.12-gcc -B../../../../../erc32/lib/ -specs bsp_specs -qrtems -DHAVE_CONFIG_H -I. -I/home/chris/development/rtems/kernel/rtems/c/src/../../testsuites/samples/nsecs -I.. -I/home/chris/development/rtems/kernel/rtems/c/src/../../testsuites/samples/../support/include -mcpu=cypress -O2 -g -ffunction-sections -fdata-sections -Wall -Wmissing-prototypes -Wimplicit-function-declaration -Wstrict-prototypes -Wnested-externs -MT empty.o -MD -MP -MF .deps/empty.Tpo -c -o empty.o /home/chris/development/rtems/kernel/rtems/c/src/../../testsuites/samples/nsecs/empty.c |
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265 | mv -f .deps/empty.Tpo .deps/empty.Po |
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266 | mv -f .deps/init.Tpo .deps/init.Po |
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267 | sparc-rtems4.12-gcc -B../../../../../erc32/lib/ -specs bsp_specs -qrtems -mcpu=cypress -O2 -g -ffunction-sections -fdata-sections -Wall -Wmissing-prototypes -Wimplicit-function-declaration -Wstrict-prototypes -Wnested-externs -Wl,--gc-sections -mcpu=cypress -o nsecs.exe init.o empty.o |
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268 | sparc-rtems4.12-nm -g -n nsecs.exe > nsecs.num |
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269 | sparc-rtems4.12-size nsecs.exe |
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270 | text data bss dec hex filename |
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271 | 121392 1888 6624 129904 1fb70 nsecs.exe |
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272 | cp nsecs.exe nsecs.ralf |
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273 | make[6]: Leaving directory '/home/chris/development/rtems/kernel/erc32/sparc-rtems4.12/ c/erc32/testsuites/samples/nsecs' |
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274 | make[5]: Leaving directory '/home/chris/development/rtems/kernel/erc32/sparc-rtems4.12/ c/erc32/testsuites/samples' |
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275 | make[4]: Leaving directory '/home/chris/development/rtems/kernel/erc32/sparc-rtems4.12/ c/erc32/testsuites/samples' |
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276 | make[4]: Entering directory '/home/chris/development/rtems/kernel/erc32/sparc-rtems4.12/ c/erc32/testsuites' |
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277 | make[4]: Nothing to be done for 'all-am'. |
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278 | make[4]: Leaving directory '/home/chris/development/rtems/kernel/erc32/sparc-rtems4.12/ c/erc32/testsuites' |
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279 | make[3]: Leaving directory '/home/chris/development/rtems/kernel/erc32/sparc-rtems4.12/ c/erc32/testsuites' |
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280 | make[2]: Leaving directory '/home/chris/development/rtems/kernel/erc32/sparc-rtems4.12/ c/erc32' |
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281 | make[1]: Leaving directory '/home/chris/development/rtems/kernel/erc32/sparc-rtems4.12/c' |
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282 | make[1]: Entering directory '/home/chris/development/rtems/kernel/erc32' |
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283 | make[1]: Nothing to be done for 'all-am'. |
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284 | make[1]: Leaving directory '/home/chris/development/rtems/kernel/erc32' |
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285 | |
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286 | Installing A BSP |
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287 | ~~~~~~~~~~~~~~~~ |
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288 | |
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289 | All that remains to be done is to install the kernel. Installing RTEMS copies |
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290 | the API headers and architecture specific libraries to a locaiton under the |
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291 | `prefix` you provide. You can install any number of BSPs under the same |
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292 | `prefix`. We recommend you have a separate `prefix` for different versions of |
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293 | RTEMS. Do not mix versions of RTEMS under the same `prefix`. Make installs |
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294 | RTEMS with the following command: |
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295 | |
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296 | .. code-block:: shell |
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297 | |
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298 | $ make install |
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299 | Making install in tools/build |
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300 | make[1]: Entering directory '/home/chris/development/rtems/kernel/erc32/tools/build' |
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301 | make[2]: Entering directory '/home/chris/development/rtems/kernel/erc32/tools/build' |
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302 | /bin/mkdir -p '/home/chris/development/rtems/4.12/bin' |
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303 | /usr/bin/install -c cklength eolstrip packhex unhex rtems-bin2c '/home/chris/development/rtems/4.12/bin' |
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304 | /bin/mkdir -p '/home/chris/development/rtems/4.12/bin' |
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305 | /usr/bin/install -c install-if-change '/home/chris/development/rtems/4.12/bin' |
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306 | make[2]: Nothing to be done for 'install-data-am'. |
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307 | make[2]: Leaving directory '/home/chris/development/rtems/kernel/erc32/tools/build' |
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308 | make[1]: Leaving directory '/home/chris/development/rtems/kernel/erc32/tools/build' |
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309 | Making install in tools/cpu |
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310 | make[1]: Entering directory '/home/chris/development/rtems/kernel/erc32/tools/cpu' |
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311 | Making install in generic |
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312 | make[2]: Entering directory '/home/chris/development/rtems/kernel/erc32/tools/cpu/generic' |
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313 | make[3]: Entering directory '/home/chris/development/rtems/kernel/erc32/tools/cpu/generic' |
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314 | make[3]: Nothing to be done for 'install-exec-am'. |
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315 | make[3]: Nothing to be done for 'install-data-am'. |
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316 | make[3]: Leaving directory '/home/chris/development/rtems/kernel/erc32/tools/cpu/generic' |
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317 | make[2]: Leaving directory '/home/chris/development/rtems/kernel/erc32/tools/cpu/generic' |
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318 | make[2]: Entering directory '/home/chris/development/rtems/kernel/erc32/tools/cpu' |
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319 | make[3]: Entering directory '/home/chris/development/rtems/kernel/erc32/tools/cpu' |
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320 | make[3]: Nothing to be done for 'install-exec-am'. |
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321 | make[3]: Nothing to be done for 'install-data-am'. |
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322 | make[3]: Leaving directory '/home/chris/development/rtems/kernel/erc32/tools/cpu' |
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323 | make[2]: Leaving directory '/home/chris/development/rtems/kernel/erc32/tools/cpu' |
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324 | make[1]: Leaving directory '/home/chris/development/rtems/kernel/erc32/tools/cpu |
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325 | ...... |
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326 | make[1]: Leaving directory '/home/chris/development/rtems/kernel/erc32/sparc-rtems4.12/c' |
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327 | make[1]: Entering directory '/home/chris/development/rtems/kernel/erc32' |
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328 | make[2]: Entering directory '/home/chris/development/rtems/kernel/erc32' |
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329 | make[2]: Nothing to be done for 'install-exec-am'. |
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330 | /bin/mkdir -p '/home/chris/development/rtems/4.12/make' |
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331 | /usr/bin/install -c -m 644 /home/chris/development/rtems/kernel/rtems/make/main.cfg /home/chris/development/rtems/kernel/rtems/make/leaf.cfg '/home/chris/development/rtems/4.12/make' |
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332 | /bin/mkdir -p '/home/chris/development/rtems/4.12/share/rtems4.12/make/Templates' |
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333 | /usr/bin/install -c -m 644 /home/chris/development/rtems/kernel/rtems/make/Templates/Makefile.dir /home/chris/development/rtems/kernel/rtems/make/Templates/Makefile.leaf /home/chris/development/rtems/kernel/rtems/make/Templates/Makefile.lib '/home/chris/development/rtems/4.12/share/rtems4.12/make/Templates' |
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334 | /bin/mkdir -p '/home/chris/development/rtems/4.12/make/custom' |
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335 | /usr/bin/install -c -m 644 /home/chris/development/rtems/kernel/rtems/make/custom/default.cfg '/home/chris/development/rtems/4.12/make/custom' |
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336 | make[2]: Leaving directory '/home/chris/development/rtems/kernel/erc32' |
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337 | make[1]: Leaving directory '/home/chris/development/rtems/kernel/erc32' |
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338 | |
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339 | Contributing Patches |
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340 | ~~~~~~~~~~~~~~~~~~~~ |
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341 | |
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342 | RTEMS welcomes fixes to bugs and new features. The RTEMS Project likes to have |
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343 | bugs fixed against a ticket created on our :r:url:`devel`. Please raise a |
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344 | ticket if you have a bug. Any changes that are made can be tracked against the |
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345 | ticket. If you want to add a new a feature please post a message to |
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346 | :r:list:`devel` describing what you would like to implement. The RTEMS |
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347 | maintainer will help decide if the feature is in the best interest of the |
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348 | project. Not everything is and the maintainers need to evalulate how much |
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349 | effort it is to maintain the feature. Once accepted into the source tree it |
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350 | becomes the responsibility of the maintainers to keep the feature updated and |
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351 | working. |
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352 | |
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353 | Changes to the source tree are tracked using git. If you have not made changes |
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354 | and enter the source tree and enter a git status command you will see nothing |
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355 | has changed: |
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356 | |
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357 | .. code-block:: shell |
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358 | |
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359 | $ cd ../rtems |
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360 | $ git status |
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361 | On branch master |
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362 | Your branch is up-to-date with 'origin/master'. |
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363 | nothing to commit, working directory clean |
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364 | |
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365 | We will make a change to the source code. In this example I change the help |
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366 | message to the RTEMS shell's ``halt`` command. Running the same git status |
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367 | command reports: |
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368 | |
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369 | .. code-block:: shell |
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370 | |
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371 | $ git status |
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372 | On branch master |
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373 | Your branch is up-to-date with 'origin/master'. |
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374 | Changes not staged for commit: |
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375 | (use "git add <file>..." to update what will be committed) |
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376 | (use "git checkout -- <file>..." to discard changes in working directory) |
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377 | |
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378 | modified: cpukit/libmisc/shell/main_halt.c |
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379 | |
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380 | no changes added to commit (use "git add" and/or "git commit -a") |
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381 | |
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382 | As an example I have a ticket open and the ticket number is 9876. I commit the |
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383 | change with the follow git command: |
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384 | |
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385 | .. code-block:: shell |
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386 | |
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387 | $ git commit cpukit/libmisc/shell/main_halt.c |
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388 | |
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389 | An editor is opened and I enter my commit message. The first line is a title |
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390 | and the following lines form a body. My message is: |
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391 | |
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392 | .. code-block:: shell |
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393 | |
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394 | shell: Add more help detail to the halt command. |
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395 | |
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396 | Closes #9876. |
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397 | |
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398 | # Please enter the commit message for your changes. Lines starting |
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399 | # with '#' will be ignored, and an empty message aborts the commit. |
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400 | # Explicit paths specified without -i or -o; assuming --only paths... |
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401 | # |
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402 | # Committer: Chris Johns <chrisj@rtems.org> |
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403 | # |
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404 | # On branch master |
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405 | # Your branch is up-to-date with 'origin/master'. |
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406 | # |
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407 | # Changes to be committed: |
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408 | # modified: cpukit/libmisc/shell/main_halt.c |
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409 | |
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410 | When you save and exit the editor git will report the commit's status: |
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411 | |
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412 | .. code-block:: shell |
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413 | |
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414 | $ git commit cpukit/libmisc/shell/main_halt.c |
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415 | [master 9f44dc9] shell: Add more help detail to the halt command. |
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416 | 1 file changed, 1 insertion(+), 1 deletion(-) |
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417 | |
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418 | You can either email the patch to :r:list:`devel` with the following git |
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419 | command, and it is `minus one` on the command line: |
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420 | |
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421 | .. code-block:: shell |
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422 | |
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423 | $ git send-email --to=devel@rtems.org -1 |
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424 | <add output here> |
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425 | |
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426 | Or you can ask git to create a patch file using: |
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427 | |
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428 | .. code-block:: shell |
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429 | |
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430 | $ git format-patch -1 |
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431 | 0001-shell-Add-more-help-detail-to-the-halt-command.patch |
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432 | |
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433 | This patch can be attached to a ticket. |
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