1 /*============================================================================
2 CMake - Cross Platform Makefile Generator
3 Copyright 2000-2009 Kitware, Inc., Insight Software Consortium
5 Distributed under the OSI-approved BSD License (the "License");
6 see accompanying file Copyright.txt for details.
8 This software is distributed WITHOUT ANY WARRANTY; without even the
9 implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
10 See the License for more information.
11 ============================================================================*/
12 #ifndef cmAddCustomCommandCommand_h
13 #define cmAddCustomCommandCommand_h
15 #include "cmCommand.h"
16 #include "cmDocumentGeneratorExpressions.h"
18 /** \class cmAddCustomCommandCommand
21 * cmAddCustomCommandCommand defines a new command (rule) that can
22 * be executed within the build process
26 class cmAddCustomCommandCommand : public cmCommand
30 * This is a virtual constructor for the command.
32 virtual cmCommand* Clone()
34 return new cmAddCustomCommandCommand;
38 * This is called when the command is first encountered in
39 * the CMakeLists.txt file.
41 virtual bool InitialPass(std::vector<std::string> const& args,
42 cmExecutionStatus &status);
45 * The name of the command as specified in CMakeList.txt.
47 virtual const char* GetName() const {return "add_custom_command";}
50 * Succinct documentation.
52 virtual const char* GetTerseDocumentation() const
54 return "Add a custom build rule to the generated build system.";
60 virtual const char* GetFullDocumentation() const
63 "There are two main signatures for add_custom_command "
64 "The first signature is for adding a custom command "
65 "to produce an output.\n"
66 " add_custom_command(OUTPUT output1 [output2 ...]\n"
67 " COMMAND command1 [ARGS] [args1...]\n"
68 " [COMMAND command2 [ARGS] [args2...] ...]\n"
69 " [MAIN_DEPENDENCY depend]\n"
70 " [DEPENDS [depends...]]\n"
71 " [IMPLICIT_DEPENDS <lang1> depend1\n"
72 " [<lang2> depend2] ...]\n"
73 " [WORKING_DIRECTORY dir]\n"
74 " [COMMENT comment] [VERBATIM] [APPEND])\n"
75 "This defines a command to generate specified OUTPUT file(s). "
76 "A target created in the same directory (CMakeLists.txt file) that "
77 "specifies any output of the custom command as a source file is given "
78 "a rule to generate the file using the command at build time. "
79 "Do not list the output in more than one independent target that may "
80 "build in parallel or the two instances of the rule may conflict "
81 "(instead use add_custom_target to drive the command and make the "
82 "other targets depend on that one). "
83 "If an output name is a relative path it will be interpreted "
84 "relative to the build tree directory corresponding to the current "
86 "Note that MAIN_DEPENDENCY is completely optional and is "
87 "used as a suggestion to visual studio about where to hang the "
88 "custom command. In makefile terms this creates a new target in the "
90 " OUTPUT: MAIN_DEPENDENCY DEPENDS\n"
92 "If more than one command is specified they will be executed in order. "
93 "The optional ARGS argument is for backward compatibility and will be "
95 "The second signature adds a custom command to a target "
96 "such as a library or executable. This is useful for "
97 "performing an operation before or after building the target. "
98 "The command becomes part of the target and will only execute "
99 "when the target itself is built. If the target is already built,"
100 " the command will not execute.\n"
101 " add_custom_command(TARGET target\n"
102 " PRE_BUILD | PRE_LINK | POST_BUILD\n"
103 " COMMAND command1 [ARGS] [args1...]\n"
104 " [COMMAND command2 [ARGS] [args2...] ...]\n"
105 " [WORKING_DIRECTORY dir]\n"
106 " [COMMENT comment] [VERBATIM])\n"
107 "This defines a new command that will be associated with "
108 "building the specified target. When the command will "
109 "happen is determined by which of the following is specified:\n"
110 " PRE_BUILD - run before all other dependencies\n"
111 " PRE_LINK - run after other dependencies\n"
112 " POST_BUILD - run after the target has been built\n"
113 "Note that the PRE_BUILD option is only supported on Visual "
114 "Studio 7 or later. For all other generators PRE_BUILD "
115 "will be treated as PRE_LINK.\n"
116 "If WORKING_DIRECTORY is specified the command will be executed "
117 "in the directory given. "
118 "If it is a relative path it will be interpreted relative to the "
119 "build tree directory corresponding to the current source directory. "
120 "If COMMENT is set, the value will be displayed as a "
121 "message before the commands are executed at build time. "
122 "If APPEND is specified the COMMAND and DEPENDS option values "
123 "are appended to the custom command for the first output specified. "
124 "There must have already been a previous call to this command with "
125 "the same output. The COMMENT, WORKING_DIRECTORY, and MAIN_DEPENDENCY "
126 "options are currently ignored when APPEND is given, "
127 "but may be used in the future."
129 "If VERBATIM is given then all arguments to the commands will be "
130 "escaped properly for the build tool so that the invoked command "
131 "receives each argument unchanged. "
132 "Note that one level of escapes is still used by the CMake language "
133 "processor before add_custom_command even sees the arguments. "
134 "Use of VERBATIM is recommended as it enables correct behavior. "
135 "When VERBATIM is not given the behavior is platform specific because "
136 "there is no protection of tool-specific special characters."
138 "If the output of the custom command is not actually "
139 "created as a file on disk it should be marked as SYMBOLIC with "
140 "SET_SOURCE_FILES_PROPERTIES.\n"
142 "The IMPLICIT_DEPENDS option requests scanning of implicit "
143 "dependencies of an input file. The language given specifies the "
144 "programming language whose corresponding dependency scanner should "
145 "be used. Currently only C and CXX language scanners are supported. "
146 "The language has to be specified for every file in the "
147 "IMPLICIT_DEPENDS list. "
148 "Dependencies discovered from the scanning are added to those of "
149 "the custom command at build time. Note that the IMPLICIT_DEPENDS "
150 "option is currently supported only for Makefile generators and "
151 "will be ignored by other generators."
153 "If COMMAND specifies an executable target (created by "
154 "ADD_EXECUTABLE) it will automatically be replaced by the location "
155 "of the executable created at build time. Additionally a "
156 "target-level dependency will be added so that the executable target "
157 "will be built before any target using this custom command. However "
158 "this does NOT add a file-level dependency that would cause the "
159 "custom command to re-run whenever the executable is recompiled."
161 "Arguments to COMMAND may use \"generator expressions\" with the "
162 "syntax \"$<...>\". "
163 CM_DOCUMENT_COMMAND_GENERATOR_EXPRESSIONS
164 "References to target names in generator expressions imply "
165 "target-level dependencies, but NOT file-level dependencies. "
166 "List target names with the DEPENDS option to add file dependencies."
168 "The DEPENDS option specifies files on which the command depends. "
169 "If any dependency is an OUTPUT of another custom command in the "
170 "same directory (CMakeLists.txt file) CMake automatically brings the "
171 "other custom command into the target in which this command is built. "
172 "If DEPENDS is not specified the command will run whenever the OUTPUT "
173 "is missing; if the command does not actually create the OUTPUT then "
174 "the rule will always run. "
175 "If DEPENDS specifies any target (created by an ADD_* command) "
176 "a target-level dependency is created to make sure the target is "
177 "built before any target using this custom command. Additionally, "
178 "if the target is an executable or library a file-level dependency "
179 "is created to cause the custom command to re-run whenever the target "
184 cmTypeMacro(cmAddCustomCommandCommand, cmCommand);
186 bool CheckOutputs(const std::vector<std::string>& outputs);