![]() ![]() It might also work in Qt5, but again I haven't tested it. This is determined by the locations of all the SHARED and MODULE targets in the targets transitive dependencies. Quoting the documentation: List of DLLs that the target depends on at runtime. ![]() These are common when using the built-in Find modules, rather than using a library's first-party CMake config-mode package. Note also that UNKNOWN libraries will be ignored by this generator expression. COMMAND_EXPAND_LISTS makes sure that the semicolon-delimited list returned by $ will be split into multiple arguments, rather than passed as a single argument with (escaped) semicolons in it. The if (WIN32) check ensures that $ won't be empty, which would cause the command to fail (rather than do nothing). Target_link_libraries(main PRIVATE foo::foo)ĬOMMAND $ -E copy_if_different This generator expression can be used to copy all of the DLLs that a target depends on into its output directory in a POST_BUILD custom command.Īn example of how to use this (adapted from the docs) follows: find_package(foo REQUIRED) On non-DLL platforms, it evaluates to an empty string. Using this generator expression on targets other than executables, SHARED libraries, and MODULE libraries is an error. ![]() This is determined by the locations of all the SHARED and MODULE targets in the target's transitive dependencies. List of DLLs that the target depends on at runtime. But this is not recommended, because a file from one build type will be overwritten by the file from another build type.Īs of CMake 3.21+, the $ generator expression can help copy dependent DLLs to the build tree. Technically, it is possible to set the same output directory for any build type. But for extracting this subdirectory, you should again resort to generator expressions: $. ![]() The target is the name of a CMake target (executable, library, or custom) to which you want to add the custom command. addcustomcommand has two main signatures: one for adding a custom command to a target and one for adding a custom command to build a file. E.g., they cannot be used in message() command.Īlternatively, you may explicitely set variable CMAKE_RUNTIME_OUTPUT_DIRECTORY, so for every build type will just append appropriate subdirectory to it. For those more familiar with Visual Studio, it adds a custom build step to a file. Note, that generator expressions can be used only when their usage is explicitly allowed in documentation. It will return full directory, with "Release/" or "Debug/" already appended. Instead, generator-expressions should be used.Į.g., output directory for executable or library target can be extracted with $ generator expression. General advice: manually copying files from the build tree to either elsewhere in the build tree or especially to the source tree is practically never needed and a bad idea.In Visual Studio, during configuration step (when CMakeLists.txt files are processed) build type is not set, so no build-type-dependent variable or property is usable directly. Target_link_libraries(target5 PRIVATE target4objs) Target_link_libraries(target4 PRIVATE target4objs)Īnd in subdir5/6 you would write: add_executable(target5 src1.cpp. )Īdd_executable(target4 extra_src_not_shared.cpp. Then in subdir4's CMakeLists.txt you would write: add_library(target4objs OBJECT src1.cpp src2.cpp. Suppose you have a higher-level CMakeLists.txt file with. See below for a sketch and the documentation here: You can achieve this with object libraries in CMake. I have multiple sub directories the 4th one has add_executable which generates object files and exe file the fifth and sixth sub directories need some object files. ![]()
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