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1 ===============
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2 LLVMBuild Guide
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3 ===============
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4
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5 .. contents::
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6 :local:
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7
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8 Introduction
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9 ============
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11 This document describes the ``LLVMBuild`` organization and files which
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12 we use to describe parts of the LLVM ecosystem. For description of
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13 specific LLVMBuild related tools, please see the command guide.
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14
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15 LLVM is designed to be a modular set of libraries which can be flexibly
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16 mixed together in order to build a variety of tools, like compilers,
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17 JITs, custom code generators, optimization passes, interpreters, and so
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18 on. Related projects in the LLVM system like Clang and LLDB also tend to
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19 follow this philosophy.
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20
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21 In order to support this usage style, LLVM has a fairly strict structure
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22 as to how the source code and various components are organized. The
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23 ``LLVMBuild.txt`` files are the explicit specification of that
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24 structure, and are used by the build systems and other tools in order to
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25 develop the LLVM project.
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26
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27 Project Organization
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28 ====================
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29
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30 The source code for LLVM projects using the LLVMBuild system (LLVM,
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31 Clang, and LLDB) is organized into *components*, which define the
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32 separate pieces of functionality that make up the project. These
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33 projects may consist of many libraries, associated tools, build tools,
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34 or other utility tools (for example, testing tools).
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35
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36 For the most part, the project contents are organized around defining
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37 one main component per each subdirectory. Each such directory contains
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38 an ``LLVMBuild.txt`` which contains the component definitions.
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39
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40 The component descriptions for the project as a whole are automatically
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41 gathered by the LLVMBuild tools. The tools automatically traverse the
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42 source directory structure to find all of the component description
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43 files. NOTE: For performance/sanity reasons, we only traverse into
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44 subdirectories when the parent itself contains an ``LLVMBuild.txt``
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45 description file.
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46
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47 Build Integration
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48 =================
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49
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50 The LLVMBuild files themselves are just a declarative way to describe
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51 the project structure. The actual building of the LLVM project is
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52 handled by another build system (See: :doc:`CMake <CMake>`).
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53
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54 The build system implementation will load the relevant contents of the
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55 LLVMBuild files and use that to drive the actual project build.
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56 Typically, the build system will only need to load this information at
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57 "configure" time, and use it to generate native information. Build
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58 systems will also handle automatically reconfiguring their information
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59 when the contents of the ``LLVMBuild.txt`` files change.
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60
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61 Developers generally are not expected to need to be aware of the details
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62 of how the LLVMBuild system is integrated into their build. Ideally,
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63 LLVM developers who are not working on the build system would only ever
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64 need to modify the contents of the ``LLVMBuild.txt`` description files
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65 (although we have not reached this goal yet).
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66
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67 For more information on the utility tool we provide to help interfacing
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68 with the build system, please see the :doc:`llvm-build
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69 <CommandGuide/llvm-build>` documentation.
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70
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71 Component Overview
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72 ==================
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73
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74 As mentioned earlier, LLVM projects are organized into logical
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75 *components*. Every component is typically grouped into its own
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76 subdirectory. Generally, a component is organized around a coherent
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77 group of sources which have some kind of clear API separation from other
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78 parts of the code.
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79
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80 LLVM primarily uses the following types of components:
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81
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82 - *Libraries* - Library components define a distinct API which can be
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83 independently linked into LLVM client applications. Libraries typically
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84 have private and public header files, and may specify a link of required
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85 libraries that they build on top of.
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86 - *Build Tools* - Build tools are applications which are designed to be run
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87 as part of the build process (typically to generate other source files).
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88 Currently, LLVM uses one main build tool called :doc:`TableGen/index`
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89 to generate a variety of source files.
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90 - *Tools* - Command line applications which are built using the LLVM
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91 component libraries. Most LLVM tools are small and are primarily
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92 frontends to the library interfaces.
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93
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94 Components are described using ``LLVMBuild.txt`` files in the directories
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95 that define the component. See the `LLVMBuild Format Reference`_ section
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96 for information on the exact format of these files.
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97
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98 LLVMBuild Format Reference
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99 ==========================
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100
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101 LLVMBuild files are written in a simple variant of the INI or configuration
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102 file format (`Wikipedia entry`_). The format defines a list of sections
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103 each of which may contain some number of properties. A simple example of
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104 the file format is below:
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105
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106 .. _Wikipedia entry: http://en.wikipedia.org/wiki/INI_file
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107
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108 .. code-block:: ini
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109
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110 ; Comments start with a semi-colon.
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111
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112 ; Sections are declared using square brackets.
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113 [component_0]
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114
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115 ; Properties are declared using '=' and are contained in the previous section.
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116 ;
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117 ; We support simple string and boolean scalar values and list values, where
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118 ; items are separated by spaces. There is no support for quoting, and so
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119 ; property values may not contain spaces.
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120 property_name = property_value
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121 list_property_name = value_1 value_2 ... value_n
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122 boolean_property_name = 1 (or 0)
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123
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124 LLVMBuild files are expected to define a strict set of sections and
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125 properties. A typical component description file for a library
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126 component would look like the following example:
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127
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128 .. code-block:: ini
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129
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130 [component_0]
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131 type = Library
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
132 name = Linker
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
133 parent = Libraries
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
134 required_libraries = Archive BitReader Core Support TransformUtils
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
135
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
136 A full description of the exact sections and properties which are
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
137 allowed follows.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
138
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
139 Each file may define exactly one common component, named ``common``. The
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
140 common component may define the following properties:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
141
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
142 - ``subdirectories`` **[optional]**
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
143
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
144 If given, a list of the names of the subdirectories from the current
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
145 subpath to search for additional LLVMBuild files.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
146
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
147 Each file may define multiple components. Each component is described by a
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
148 section who name starts with ``component``. The remainder of the section
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
149 name is ignored, but each section name must be unique. Typically components
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
150 are just number in order for files with multiple components
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
151 (``component_0``, ``component_1``, and so on).
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
152
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
153 .. warning::
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
154
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
155 Section names not matching this format (or the ``common`` section) are
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
156 currently unused and are disallowed.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
157
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
158 Every component is defined by the properties in the section. The exact
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
159 list of properties that are allowed depends on the component type.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
160 Components **may not** define any properties other than those expected
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
161 by the component type.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
162
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
163 Every component must define the following properties:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
164
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
165 - ``type`` **[required]**
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
166
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
167 The type of the component. Supported component types are detailed
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
168 below. Most components will define additional properties which may be
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
169 required or optional.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
170
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
171 - ``name`` **[required]**
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
172
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
173 The name of the component. Names are required to be unique across the
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
174 entire project.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
175
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
176 - ``parent`` **[required]**
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
177
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
178 The name of the logical parent of the component. Components are
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
179 organized into a logical tree to make it easier to navigate and
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
180 organize groups of components. The parents have no semantics as far
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
181 as the project build is concerned, however. Typically, the parent
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
182 will be the main component of the parent directory.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
183
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
184 Components may reference the root pseudo component using ``$ROOT`` to
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
185 indicate they should logically be grouped at the top-level.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
186
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
187 Components may define the following properties:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
188
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
189 - ``dependencies`` **[optional]**
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
190
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
191 If specified, a list of names of components which *must* be built
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
192 prior to this one. This should only be exactly those components which
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
193 produce some tool or source code required for building the component.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
194
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
195 .. note::
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
196
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
197 ``Group`` and ``LibraryGroup`` components have no semantics for the
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
198 actual build, and are not allowed to specify dependencies.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
199
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
200 The following section lists the available component types, as well as
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
201 the properties which are associated with that component.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
202
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
203 - ``type = Group``
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
204
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
205 Group components exist purely to allow additional arbitrary structuring
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
206 of the logical components tree. For example, one might define a
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
207 ``Libraries`` group to hold all of the root library components.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
208
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
209 ``Group`` components have no additionally properties.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
210
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
211 - ``type = Library``
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
212
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
213 Library components define an individual library which should be built
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
214 from the source code in the component directory.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
215
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
216 Components with this type use the following properties:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
217
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
218 - ``library_name`` **[optional]**
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
219
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
220 If given, the name to use for the actual library file on disk. If
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
221 not given, the name is derived from the component name itself.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
222
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
223 - ``required_libraries`` **[optional]**
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
224
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
225 If given, a list of the names of ``Library`` or ``LibraryGroup``
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
226 components which must also be linked in whenever this library is
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
227 used. That is, the link time dependencies for this component. When
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
228 tools are built, the build system will include the transitive closure
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
229 of all ``required_libraries`` for the components the tool needs.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
230
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
231 - ``add_to_library_groups`` **[optional]**
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
232
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
233 If given, a list of the names of ``LibraryGroup`` components which
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
234 this component is also part of. This allows nesting groups of
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
235 components. For example, the ``X86`` target might define a library
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
236 group for all of the ``X86`` components. That library group might
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
237 then be included in the ``all-targets`` library group.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
238
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
239 - ``installed`` **[optional]** **[boolean]**
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
240
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
241 Whether this library is installed. Libraries that are not installed
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
242 are only reported by ``llvm-config`` when it is run as part of a
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
243 development directory.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
244
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
245 - ``type = LibraryGroup``
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
246
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
247 ``LibraryGroup`` components are a mechanism to allow easy definition of
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
248 useful sets of related components. In particular, we use them to easily
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
249 specify things like "all targets", or "all assembly printers".
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
250
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
251 Components with this type use the following properties:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
252
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
253 - ``required_libraries`` **[optional]**
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
254
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
255 See the ``Library`` type for a description of this property.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
256
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
257 - ``add_to_library_groups`` **[optional]**
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
258
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
259 See the ``Library`` type for a description of this property.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
260
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
261 - ``type = TargetGroup``
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
262
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
263 ``TargetGroup`` components are an extension of ``LibraryGroup``\s,
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
264 specifically for defining LLVM targets (which are handled specially in a
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
265 few places).
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
266
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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267 The name of the component should always be the name of the target.
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268
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269 Components with this type use the ``LibraryGroup`` properties in
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270 addition to:
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271
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272 - ``has_asmparser`` **[optional]** **[boolean]**
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273
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274 Whether this target defines an assembly parser.
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275
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276 - ``has_asmprinter`` **[optional]** **[boolean]**
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277
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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278 Whether this target defines an assembly printer.
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279
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280 - ``has_disassembler`` **[optional]** **[boolean]**
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281
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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282 Whether this target defines a disassembler.
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283
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284 - ``has_jit`` **[optional]** **[boolean]**
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285
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286 Whether this target supports JIT compilation.
95c75e76d11b LLVM 3.4
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287
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288 - ``type = Tool``
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289
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290 ``Tool`` components define standalone command line tools which should be
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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291 built from the source code in the component directory and linked.
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diff changeset
292
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293 Components with this type use the following properties:
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294
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295 - ``required_libraries`` **[optional]**
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296
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297 If given, a list of the names of ``Library`` or ``LibraryGroup``
95c75e76d11b LLVM 3.4
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298 components which this tool is required to be linked with.
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diff changeset
299
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300 .. note::
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diff changeset
301
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302 The values should be the component names, which may not always
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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303 match up with the actual library names on disk.
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diff changeset
304
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diff changeset
305 Build systems are expected to properly include all of the libraries
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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diff changeset
306 required by the linked components (i.e., the transitive closure of
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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diff changeset
307 ``required_libraries``).
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diff changeset
308
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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diff changeset
309 Build systems are also expected to understand that those library
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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diff changeset
310 components must be built prior to linking -- they do not also need
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
311 to be listed under ``dependencies``.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
312
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
313 - ``type = BuildTool``
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
314
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
315 ``BuildTool`` components are like ``Tool`` components, except that the
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
316 tool is supposed to be built for the platform where the build is running
77
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents: 0
diff changeset
317 (instead of that platform being targeted). Build systems are expected
0
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
318 to handle the fact that required libraries may need to be built for
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
319 multiple platforms in order to be able to link this tool.
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
320
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
321 ``BuildTool`` components currently use the exact same properties as
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
322 ``Tool`` components, the type distinction is only used to differentiate
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
323 what the tool is built for.