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737c49a357
Use const_cast for the special case in cmFindBase where GetFullDocumentation calls GenerateDocumentation.
188 lines
8.7 KiB
C++
188 lines
8.7 KiB
C++
/*============================================================================
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CMake - Cross Platform Makefile Generator
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Copyright 2000-2009 Kitware, Inc., Insight Software Consortium
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Distributed under the OSI-approved BSD License (the "License");
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see accompanying file Copyright.txt for details.
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This software is distributed WITHOUT ANY WARRANTY; without even the
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implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the License for more information.
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============================================================================*/
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#ifndef cmAddCustomCommandCommand_h
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#define cmAddCustomCommandCommand_h
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#include "cmCommand.h"
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#include "cmDocumentGeneratorExpressions.h"
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/** \class cmAddCustomCommandCommand
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* \brief
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*
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* cmAddCustomCommandCommand defines a new command (rule) that can
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* be executed within the build process
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*
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*/
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class cmAddCustomCommandCommand : public cmCommand
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{
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public:
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/**
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* This is a virtual constructor for the command.
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*/
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virtual cmCommand* Clone()
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{
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return new cmAddCustomCommandCommand;
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}
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/**
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* This is called when the command is first encountered in
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* the CMakeLists.txt file.
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*/
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virtual bool InitialPass(std::vector<std::string> const& args,
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cmExecutionStatus &status);
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/**
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* The name of the command as specified in CMakeList.txt.
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*/
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virtual const char* GetName() const {return "add_custom_command";}
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/**
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* Succinct documentation.
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*/
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virtual const char* GetTerseDocumentation() const
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{
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return "Add a custom build rule to the generated build system.";
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}
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/**
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* More documentation.
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*/
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virtual const char* GetFullDocumentation() const
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{
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return
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"There are two main signatures for add_custom_command "
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"The first signature is for adding a custom command "
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"to produce an output.\n"
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" add_custom_command(OUTPUT output1 [output2 ...]\n"
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" COMMAND command1 [ARGS] [args1...]\n"
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" [COMMAND command2 [ARGS] [args2...] ...]\n"
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" [MAIN_DEPENDENCY depend]\n"
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" [DEPENDS [depends...]]\n"
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" [IMPLICIT_DEPENDS <lang1> depend1 ...]\n"
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" [WORKING_DIRECTORY dir]\n"
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" [COMMENT comment] [VERBATIM] [APPEND])\n"
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"This defines a command to generate specified OUTPUT file(s). "
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"A target created in the same directory (CMakeLists.txt file) that "
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"specifies any output of the custom command as a source file is given "
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"a rule to generate the file using the command at build time. "
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"Do not list the output in more than one independent target that may "
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"build in parallel or the two instances of the rule may conflict "
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"(instead use add_custom_target to drive the command and make the "
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"other targets depend on that one). "
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"If an output name is a relative path it will be interpreted "
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"relative to the build tree directory corresponding to the current "
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"source directory. "
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"Note that MAIN_DEPENDENCY is completely optional and is "
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"used as a suggestion to visual studio about where to hang the "
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"custom command. In makefile terms this creates a new target in the "
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"following form:\n"
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" OUTPUT: MAIN_DEPENDENCY DEPENDS\n"
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" COMMAND\n"
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"If more than one command is specified they will be executed in order. "
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"The optional ARGS argument is for backward compatibility and will be "
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"ignored.\n"
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"The second signature adds a custom command to a target "
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"such as a library or executable. This is useful for "
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"performing an operation before or after building the target. "
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"The command becomes part of the target and will only execute "
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"when the target itself is built. If the target is already built,"
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" the command will not execute.\n"
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" add_custom_command(TARGET target\n"
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" PRE_BUILD | PRE_LINK | POST_BUILD\n"
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" COMMAND command1 [ARGS] [args1...]\n"
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" [COMMAND command2 [ARGS] [args2...] ...]\n"
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" [WORKING_DIRECTORY dir]\n"
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" [COMMENT comment] [VERBATIM])\n"
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"This defines a new command that will be associated with "
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"building the specified target. When the command will "
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"happen is determined by which of the following is specified:\n"
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" PRE_BUILD - run before all other dependencies\n"
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" PRE_LINK - run after other dependencies\n"
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" POST_BUILD - run after the target has been built\n"
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"Note that the PRE_BUILD option is only supported on Visual "
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"Studio 7 or later. For all other generators PRE_BUILD "
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"will be treated as PRE_LINK.\n"
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"If WORKING_DIRECTORY is specified the command will be executed "
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"in the directory given. "
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"If it is a relative path it will be interpreted relative to the "
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"build tree directory corresponding to the current source directory. "
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"If COMMENT is set, the value will be displayed as a "
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"message before the commands are executed at build time. "
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"If APPEND is specified the COMMAND and DEPENDS option values "
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"are appended to the custom command for the first output specified. "
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"There must have already been a previous call to this command with "
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"the same output. The COMMENT, WORKING_DIRECTORY, and MAIN_DEPENDENCY "
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"options are currently ignored when APPEND is given, "
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"but may be used in the future."
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"\n"
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"If VERBATIM is given then all arguments to the commands will be "
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"escaped properly for the build tool so that the invoked command "
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"receives each argument unchanged. "
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"Note that one level of escapes is still used by the CMake language "
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"processor before add_custom_command even sees the arguments. "
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"Use of VERBATIM is recommended as it enables correct behavior. "
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"When VERBATIM is not given the behavior is platform specific because "
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"there is no protection of tool-specific special characters."
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"\n"
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"If the output of the custom command is not actually "
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"created as a file on disk it should be marked as SYMBOLIC with "
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"SET_SOURCE_FILES_PROPERTIES.\n"
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"The IMPLICIT_DEPENDS option requests scanning of implicit "
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"dependencies of an input file. The language given specifies the "
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"programming language whose corresponding dependency scanner should "
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"be used. Currently only C and CXX language scanners are supported. "
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"Dependencies discovered from the scanning are added to those of "
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"the custom command at build time. Note that the IMPLICIT_DEPENDS "
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"option is currently supported only for Makefile generators and "
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"will be ignored by other generators."
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"\n"
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"If COMMAND specifies an executable target (created by "
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"ADD_EXECUTABLE) it will automatically be replaced by the location "
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"of the executable created at build time. Additionally a "
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"target-level dependency will be added so that the executable target "
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"will be built before any target using this custom command. However "
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"this does NOT add a file-level dependency that would cause the "
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"custom command to re-run whenever the executable is recompiled."
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"\n"
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"Arguments to COMMAND may use \"generator expressions\" with the "
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"syntax \"$<...>\". "
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CM_DOCUMENT_COMMAND_GENERATOR_EXPRESSIONS
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"References to target names in generator expressions imply "
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"target-level dependencies, but NOT file-level dependencies. "
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"List target names with the DEPENDS option to add file dependencies."
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"\n"
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"The DEPENDS option specifies files on which the command depends. "
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"If any dependency is an OUTPUT of another custom command in the "
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"same directory (CMakeLists.txt file) CMake automatically brings the "
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"other custom command into the target in which this command is built. "
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"If DEPENDS is not specified the command will run whenever the OUTPUT "
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"is missing; if the command does not actually create the OUTPUT then "
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"the rule will always run. "
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"If DEPENDS specifies any target (created by an ADD_* command) "
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"a target-level dependency is created to make sure the target is "
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"built before any target using this custom command. Additionally, "
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"if the target is an executable or library a file-level dependency "
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"is created to cause the custom command to re-run whenever the target "
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"is recompiled.\n"
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;
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}
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cmTypeMacro(cmAddCustomCommandCommand, cmCommand);
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protected:
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bool CheckOutputs(const std::vector<std::string>& outputs);
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};
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#endif
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