Target file expressions produce a full path, but _DIR and _NAME versions can produce the directory and file name components:
CMAKE LIBRARY PATH GENERATOR
Generator expressions are evaluted during build system generation to produce information specific to each build configuration. However this does NOT add a file-level dependency that would cause the custom command to re-run whenever the executable is recompiled.Īrguments to COMMAND may use "generator expressions" with the syntax "$". Additionally a target-level dependency will be added so that the executable target will be built before any target using this custom command. 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. Note that the IMPLICIT_DEPENDS option is currently supported only for Makefile generators and will be ignored by other generators. Dependencies discovered from the scanning are added to those of the custom command at build time. Currently only C and CXX language scanners are supported. The language given specifies the programming language whose corresponding dependency scanner should be used. The IMPLICIT_DEPENDS option requests scanning of implicit dependencies of an input file. 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. When VERBATIM is not given the behavior is platform specific because there is no protection of tool-specific special characters. Use of VERBATIM is recommended as it enables correct behavior. Note that one level of escapes is still used by the CMake language processor before add_custom_command even sees the arguments. 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. The COMMENT, WORKING_DIRECTORY, and MAIN_DEPENDENCY options are currently ignored when APPEND is given, but may be used in the future. There must have already been a previous call to this command with the same output. If APPEND is specified the COMMAND and DEPENDS option values are appended to the custom command for the first output specified. If COMMENT is set, the value will be displayed as a message before the commands are executed at build time. If WORKING_DIRECTORY is specified the command will be executed in the directory given. For all other generators PRE_BUILD will be treated as PRE_LINK. Note that the PRE_BUILD option is only supported on Visual Studio 7 or later. POST_BUILD - run after the target has been built
PRE_BUILD - run before all other dependencies When the command will happen is determined by which of the following is specified: This defines a new command that will be associated with building the specified target. If the target is already built, the command will not execute. The command becomes part of the target and will only execute when the target itself is built. This is useful for performing an operation before or after building the target. The second signature adds a custom command to a target such as a library or executable.
The optional ARGS argument is for backward compatibility and will be ignored. If more than one command is specified they will be executed in order. In makefile terms this creates a new target in the following form: Note that MAIN_DEPENDENCY is completely optional and is used as a suggestion to visual studio about where to hang the custom command. If an output name is a relative path it will be interpreted relative to the build tree directory corresponding to the current source directory. 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. This defines a command to generate specified OUTPUT file(s). There are two main signatures for add_custom_command The first signature is for adding a custom command to produce an output.Īdd_custom_command(OUTPUT output1 add_custom_command: Add a custom build rule to the generated build system.Cmake-commands - cmake Master Index CMake 2.8.4Ĭmake-commands - Reference of available CMake commands.
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