/*============================================================================ CMake - Cross Platform Makefile Generator Copyright 2000-2009 Kitware, Inc., Insight Software Consortium Distributed under the OSI-approved BSD License (the "License"); see accompanying file Copyright.txt for details. This software is distributed WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the License for more information. ============================================================================*/ #ifndef cmAddCustomCommandCommand_h #define cmAddCustomCommandCommand_h #include "cmCommand.h" #include "cmDocumentGeneratorExpressions.h" /** \class cmAddCustomCommandCommand * \brief * * cmAddCustomCommandCommand defines a new command (rule) that can * be executed within the build process * */ class cmAddCustomCommandCommand : public cmCommand { public: /** * This is a virtual constructor for the command. */ virtual cmCommand* Clone() { return new cmAddCustomCommandCommand; } /** * This is called when the command is first encountered in * the CMakeLists.txt file. */ virtual bool InitialPass(std::vector const& args, cmExecutionStatus &status); /** * The name of the command as specified in CMakeList.txt. */ virtual const char* GetName() const {return "add_custom_command";} /** * Succinct documentation. */ virtual const char* GetTerseDocumentation() const { return "Add a custom build rule to the generated build system."; } /** * More documentation. */ virtual const char* GetFullDocumentation() const { return "There are two main signatures for add_custom_command " "The first signature is for adding a custom command " "to produce an output.\n" " add_custom_command(OUTPUT output1 [output2 ...]\n" " COMMAND command1 [ARGS] [args1...]\n" " [COMMAND command2 [ARGS] [args2...] ...]\n" " [MAIN_DEPENDENCY depend]\n" " [DEPENDS [depends...]]\n" " [IMPLICIT_DEPENDS depend1\n" " [ depend2] ...]\n" " [WORKING_DIRECTORY dir]\n" " [COMMENT comment] [VERBATIM] [APPEND])\n" "This defines a command to generate specified OUTPUT file(s). " "A target created in the same directory (CMakeLists.txt file) that " "specifies any output of the custom command as a source file is given " "a rule to generate the file using the command at build time. " "Do not list the output in more than one independent target that may " "build in parallel or the two instances of the rule may conflict " "(instead use add_custom_target to drive the command and make the " "other targets depend on that one). " "If an output name is a relative path it will be interpreted " "relative to the build tree directory corresponding to the current " "source directory. " "Note that MAIN_DEPENDENCY is completely optional and is " "used as a suggestion to visual studio about where to hang the " "custom command. In makefile terms this creates a new target in the " "following form:\n" " OUTPUT: MAIN_DEPENDENCY DEPENDS\n" " COMMAND\n" "If more than one command is specified they will be executed in order. " "The optional ARGS argument is for backward compatibility and will be " "ignored.\n" "The second signature adds a custom command to a target " "such as a library or executable. This is useful for " "performing an operation before or after building the target. " "The command becomes part of the target and will only execute " "when the target itself is built. If the target is already built," " the command will not execute.\n" " add_custom_command(TARGET target\n" " PRE_BUILD | PRE_LINK | POST_BUILD\n" " COMMAND command1 [ARGS] [args1...]\n" " [COMMAND command2 [ARGS] [args2...] ...]\n" " [WORKING_DIRECTORY dir]\n" " [COMMENT comment] [VERBATIM])\n" "This defines a new command that will be associated with " "building the specified target. When the command will " "happen is determined by which of the following is specified:\n" " PRE_BUILD - run before all other dependencies\n" " PRE_LINK - run after other dependencies\n" " POST_BUILD - run after the target has been built\n" "Note that the PRE_BUILD option is only supported on Visual " "Studio 7 or later. For all other generators PRE_BUILD " "will be treated as PRE_LINK.\n" "If WORKING_DIRECTORY is specified the command will be executed " "in the directory given. " "If it is a relative path it will be interpreted relative to the " "build tree directory corresponding to the current source directory. " "If COMMENT is set, the value will be displayed as a " "message before the commands are executed at build time. " "If APPEND is specified the COMMAND and DEPENDS option values " "are appended to the custom command for the first output specified. " "There must have already been a previous call to this command with " "the same output. The COMMENT, WORKING_DIRECTORY, and MAIN_DEPENDENCY " "options are currently ignored when APPEND is given, " "but may be used in the future." "\n" "If VERBATIM is given then all arguments to the commands will be " "escaped properly for the build tool so that the invoked command " "receives each argument unchanged. " "Note that one level of escapes is still used by the CMake language " "processor before add_custom_command even sees the arguments. " "Use of VERBATIM is recommended as it enables correct behavior. " "When VERBATIM is not given the behavior is platform specific because " "there is no protection of tool-specific special characters." "\n" "If the output of the custom command is not actually " "created as a file on disk it should be marked as SYMBOLIC with " "SET_SOURCE_FILES_PROPERTIES.\n" "The IMPLICIT_DEPENDS option requests scanning of implicit " "dependencies of an input file. The language given specifies the " "programming language whose corresponding dependency scanner should " "be used. Currently only C and CXX language scanners are supported. " "The language has to be specified for every file in the " "IMPLICIT_DEPENDS list. " "Dependencies discovered from the scanning are added to those of " "the custom command at build time. Note that the IMPLICIT_DEPENDS " "option is currently supported only for Makefile generators and " "will be ignored by other generators." "\n" "If COMMAND specifies an executable target (created by " "ADD_EXECUTABLE) it will automatically be replaced by the location " "of the executable created at build time. Additionally a " "target-level dependency will be added so that the executable target " "will be built before any target using this custom command. However " "this does NOT add a file-level dependency that would cause the " "custom command to re-run whenever the executable is recompiled." "\n" "Arguments to COMMAND may use \"generator expressions\" with the " "syntax \"$<...>\". " CM_DOCUMENT_COMMAND_GENERATOR_EXPRESSIONS "References to target names in generator expressions imply " "target-level dependencies, but NOT file-level dependencies. " "List target names with the DEPENDS option to add file dependencies." "\n" "The DEPENDS option specifies files on which the command depends. " "If any dependency is an OUTPUT of another custom command in the " "same directory (CMakeLists.txt file) CMake automatically brings the " "other custom command into the target in which this command is built. " "If DEPENDS is not specified the command will run whenever the OUTPUT " "is missing; if the command does not actually create the OUTPUT then " "the rule will always run. " "If DEPENDS specifies any target (created by an ADD_* command) " "a target-level dependency is created to make sure the target is " "built before any target using this custom command. Additionally, " "if the target is an executable or library a file-level dependency " "is created to cause the custom command to re-run whenever the target " "is recompiled.\n" ; } cmTypeMacro(cmAddCustomCommandCommand, cmCommand); protected: bool CheckOutputs(const std::vector& outputs); }; #endif