Cmake library path variable

Cmake library path variable. Jan 10, 2024 · In classic mode, vcpkg sets CMake search paths appropriately to make installed packages available via the find_package(), find_library(), and find_path() functions. txt file in the top directory of the build tree. By default this variable is not set, which is equivalent to it having a value of TRUE. 4: Essentially I am cross-compiling C and C++ applications on Windows 10 64-bit. In all cases, settings are stored in CMakeCache. cmake. txt using. If using such an environment variable, keep its value consistent when operating in a given build tree because CMake saves the value detected when first creating a build tree. The buildsystem will have a dependency to re-link <target> if the library file changes. Both of the following conditions must be met for this variable to have any effect: The associated CMAKE_LINK_LIBRARY_USING_<FEATURE>_SUPPORTED variable must be set to true. This can be skipped if NO_CMAKE_SYSTEM_PATH is passed. CMAKE_SYSTEM_LIBRARY_PATH. Cache variables are stored in the CMake cache file, and are persisted across CMake runs. Some of the projects don't need specific variables. Path used for searching by FIND_LIBRARY(). If you use this command on linux machine. Jan 24, 2017 · 3. The entries will not be used for binaries in the install tree. The following command tells CMake to build android_native_app_glue. txt and remain there until forced out. . Moreover, to be complete, file(TO_NATIVE_PATH) is now superseded by cmake_path command. By default it is empty, it is intended to be set by the project. But that probably doesn't do what you want it to do; see below. The Bitbucket link you supplied is dead, but here are a few suggestions that might help. begin with _ followed by the name of any CMake Command. List of root paths to search on the filesystem. Jan 3, 2024 · To provide a path to your local NDK library, you can use the ANDROID_NDK path variable, which Android Studio automatically defines for you. See also CMAKE_SYSTEM_PREFIX_PATH. The find_library() command provides the full path, which can generally be used directly in calls to target_link_libraries(). Its initial value is taken from the calling process environment. If set, it results in a line like this being added to the custom build step script: set PATH=<CMAKE_MSVCIDE_RUN_PATH>;%PATH% So all that's needed then is something like this at a good place: Aug 6, 2014 · As you have noticed, the first version sets the variable as a shell environment variable, while the second sets a CMake variable. The directories in LIB and PATH. If set to NEVER, then the roots in CMAKE_FIND_ROOT_PATH will be ignored and only the host system root will be used. DIRECTORY ${CMAKE_SOURCE_DIR}/abc. The target properties ARCHIVE_OUTPUT_DIRECTORY , LIBRARY_OUTPUT_DIRECTORY, and RUNTIME_OUTPUT_DIRECTORY supercede this variable for a target if they are set. >> Now it is up to the linker to choose the right library, which is really bad! >> In our case (gcc 4. How can I export automatically this environment variable within CMake? cmake Qt build variables. Oct 23, 2016 · What is the preferred way to just touch the variable, inside the CMakeLists. 5. 0 on Ubuntu 12. See also CMAKE_SYSTEM_LIBRARY_PATH, CMAKE_PREFIX_PATH. There is also an environment variable CMAKE_LIBRARY_PATH, which is used as an additional list of search directories. txt a request to link this library. Apr 21, 2017 · set(CMAKE_BUILD_RPATH "/my/libs/location") specifying runtime path (RPATH) entries to add to binaries linked in the build tree (for platforms that support it). CMAKE_PREFIX_PATH. If set to BOTH, then the host system paths and the CMake does not automagically links libcurl (or any other library) to your program. Set IDF_PATH from environment variable or inferred from path to project. Jan 29, 2015 · As of CMake 3. Only syntactic aspects of paths are handled, there is no interaction of any kind with any underlying file system. 16. In manifest mode , in addition to the above, the toolchain detects manifest files ( vcpkg. Consider the following example of a FindXXX. Run CMake with one of the following command signatures to specify the source and build trees and generate a buildsystem: cmake [<options>] -B <path-to-build> [-S <path-to-source>] New in version 3. Note that we are talking about two different variables here, which are both named CMAKE_PREFIX_PATH. 24. If policy CMP0060 is not set to NEW, then when a library in one of these directories is given by full path to target_link_libraries() CMake will generate the -l<name> form Mar 4, 2023 · Kind of solved it with another hack. It is intended CMAKE_MSVCIDE_RUN_PATH ¶. Specifies a path which will be used by FIND_LIBRARY(). You have (or had) somewhere in your CMakeLists. Jan 10, 2024 · Here’s the relevant part of the docs which explain why you’re seeing PATH being used: Search the standard system environment variables. This is a CMake Environment Variable. TODO 3: Click to show/hide answer. If I understand the documentation correctly, you could use different / others build system as subproject, and it doesn't seem basing on cmake. exe) gives me the little "" button to get the Popup dialog? Right now, I'm using syntax like: SET(LIBRARY_INCLUDE_DIR "something" CACHE PATH "Location of libraries") But it seems to treat it as a String. CMAKE_INCLUDE_PATH. Next, the new library target is linked to the executable target using target_link_libraries(). CMake is a powerful cross-platform build system generator used to manage building, testing, and packaging software. The CMake cache may be thought of as a configuration file. When looking for a library, CMake looks first in the following variables: CMAKE_LIBRARY_PATH and LD_LIBRARY_PATH for libraries; CMAKE_INCLUDE_PATH and INCLUDE_PATH for includes; If you declare your Boost files in one of the environment variables, CMake will find it. you'd have to ensure add_subdirectory(abc) was called before the add_subdirectory for the one where this will be used. There is also an environment variable CMAKE_INCLUDE_PATH, which is used as an additional list of search directories. If set to ONLY, then only the roots in CMAKE_FIND_ROOT_PATH will be searched. – Aug 13, 2015 · Yeah, to invoke a macro you'd need to add it to a standalone CMake script file and invoke CMake itself from the command using the -P arg. Using global variable CMAKE_MSVCIDE_RUN_PATH. This variable may hold a single directory or a list of directories separated by : on UNIX or ; on Windows (the same May 20, 2016 · This question is a duplicate of How to force c++ compiler use one of different installed package's versions, using CMake? but it is found by search engines so I add the answer from texasflood that I found to be working with CMake 2. c , which manages NativeActivity lifecycle events and touch input, into a static library and links it to native-lib : Don't ask me why, but this did not work, until I made this small change: mv ~/. bash_profile with otherwise the same code and same file privileges. LIBRARY_OUTPUT_PATH ¶. target_include_directories(a PRIVATE ${XXX_INCLUDE_DIRS}) it is invoked by the compiler as. Cache variables (unless set with INTERNAL) are mostly intended for configuration settings where the first CMake run determines a suitable default value, which the user can then override, by editing the cache with tools such as ccmake or cmake-gui. Recent versions of cmake support the –prefix option to the –install mode: $ cmake --install . If set to BOTH, then the host system paths and the 1. . Search paths specified in cmake-specific environment variables. ;-list of directories specifying a search path for the find_library() command. Controls the default behavior of the following commands for whether or not to search paths provided by cmake-specific environment variables: find_program() find_library() find_file() find_path() find_package() This is useful in cross-compiling environments. See also the CMAKE_INSTALL_RPATH variable. CMake build files that use pkgconfig to find libs will then use the pkgconfig installed by MacPorts, and it will of course have correct search paths for libraries installed by MacPorts. Install cmake and pkgconfig with MacPorts. In this case, cmake removes the path from the library name, >> but does not append it as -L to the linker search paths. 1. If it is, CMake has some support for reading the registry, but I don’t think writing is exposed. This page documents variables that are provided by CMake or have meaning to CMake when set by project code. This variable is most useful when cross-compiling. FIND_LIBRARY() will check each of the contained directories for the existence of the library which is currently searched. The path may represent a non-existing path or even one that is not allowed to exist on the current file system or platform. The allowed values are: MultiThreaded. txt file. The scopes of variable visibility form a tree. /usr/lib/libfoo. , when issuing a find_library() command in a CMakeLists. Semicolon-separated list of directories specifying a search path for the find_library() command. DEFINITION ${LIBNAME}_publicheaders) However, there are a couple of provisos: This has to be called after setting the variable in the subdir. I presume it has to do something with the registry, but I don’t know. Using the –prefix Option of cmake. g. 10. This can be skipped if NO_CMAKE_PATH is passed or by setting the CMAKE_FIND_USE_CMAKE_PATH to FALSE. Semicolon-separated list of root paths to search on the filesystem. This allows for running commands and using dll's that the IDE environment is not aware of. LIBRARY_OUTPUT_PATH. CMAKE_FRAMEWORK_PATH. Setting environment variable inside CMake via set() doesn't affect build step. Nov 27, 2021 · Definitively, to avoid any trouble about escaping, especially when you pass variable contents to commands, it is strongly recommended to use exclusively the slash as path separator. 2 on Suse) it selects the wrong Mar 2, 2019 · CMake cannot affect on environment settings when executable is run. By default this contains the standard directories for the current system. - If linker call is not controlled by CMake, then the only way to get proper library search path is to set corresponded environment variable. For general information on variables, see the Variables section in the cmake-language manual. Semicolon-separated list of directories specifying installation prefixes to be searched by the find_package() , find_program(), find_library(), find_file(), and find_path() commands. Controls the default behavior of the following commands for whether or not to search paths provided by cmake-specific cache variables: This is useful in cross-compiling environments. 2 and OpenCV 3. This variable controls whether the CMAKE_FIND_ROOT_PATH and CMAKE_SYSROOT are used by find_library(). CMAKE_FRAMEWORK_PATH CMAKE_PREFIX_PATH. The flag to be used to add a library search path to a compiler. By default this variable is not set, which is equivalent to it LIBRARY_OUTPUT_PATH¶ Old library location variable. See also CMAKE_SYSTEM_LIBRARY_PATH and CMAKE_PREFIX_PATH. It is not intended to be modified by the project; use CMAKE_LIBRARY_PATH for this. Library targets are otherwise placed in this directory. ¶. 3. To make use of the new library we will add an add_subdirectory() call in the top-level CMakeLists. txt. These are intended to be used on the command line with a -DVAR=value. Old library location variable. The first time CMake is run on a project, it produces a CMakeCache. Normally, these environment variables are basically set to the few system paths in which such packages (headers and libraries) would normally CMAKE_LIBRARY_PATH. Idea is to move set(ENV{LD_LIBRARY_PATH} ) to generated CTestTestfile. 12. CMAKE_LIBRARY_PATH ¶. Situations where a library search path may be needed include: A full path to a library file: The generated link line will normally preserve the full path to the file. The target properties ARCHIVE_OUTPUT_DIRECTORY, LIBRARY_OUTPUT_DIRECTORY, and RUNTIME_OUTPUT_DIRECTORY supercede this variable for a target if they are set. Compile with -MT or equivalent flag (s) to use a multi-threaded statically-linked runtime library. Update: Here's an explicit example: IF(EIGEN_DIR) CMAKE_LIBRARY_PATH. 8. Prefer to pass full absolute paths to libraries where possible, since this ensures the correct library will always be linked. CMAKE_LIBRARY_PATH_FLAG ¶. In this mode, CMake searches for a file called Find<PackageName>. CMAKE_FIND_ROOT_PATH¶. 20, you can use the new cmake_path command for path manipulation in order to grab the FILENAME component of each path: cmake_path(GET <path-var> FILENAME <out-var>) For your example, you could do: cmake_path(GET RUNTIME_DEPENDENCY FILENAME MY_FILE_NAME) This command supersedes the get_filename_component command. 2. ;-list of directories specifying installation prefixes to be searched by the find_package() , find_program(), find_library(), find_file(), and find_path() commands. If not set explicitly May 12, 2017 · 5. CMake unset() 函数示例代码（中文） unset() 函数用于删除 CMake 变量。它可以删除普通变量、缓存变量或环境变量。用法unset() 函数的语法如下：<variable_name>：要删除的变量名称。CACHE：可选参数，用于指定要删除的变量是普通变量还是缓存变量。 TODO 1: Click to show/hide answer. TODO 2: Click to show/hide answer. CMAKE_LIBRARY_PATH. <prefix>/lib/<arch> if CMAKE_LIBRARY_ARCHITECTURE is set, and <prefix>/lib for each <prefix> in CMAKE_PREFIX_PATH. That assumes CMake build files use the FindPkgConfig module. Uses <path-to-build> as the build tree and <path-to-source> as the source tree. This variable is used to initialize the MSVC_RUNTIME_LIBRARY property on all targets as they are created. <prefix>/include/<arch> if CMAKE_LIBRARY_ARCHITECTURE is set, and <prefix>/include for each <prefix> in CMAKE_PREFIX_PATH. The CMakeFiles. Each command will add appropriate subdirectories (like bin, lib, or include) as specified in its own documentation. Example: This variable controls whether the CMAKE_FIND_ROOT_PATH and CMAKE_SYSROOT are used by find_library(). Location of the host Qt installation from which host tools may be used during another Qt build, either a regular one or a cross-compiling one. You should be able to define CMAKE_PREFIX_PATH in a CMakeList. Forces building tools even if host tools have already been found. Extra PATH locations that should be used when executing add_custom_command() or add_custom_target() when using the Visual Studio 9 2008 (or above) generator. The target properties ARCHIVE_OUTPUT_DIRECTORY, LIBRARY_OUTPUT_DIRECTORY, and RUNTIME_OUTPUT_DIRECTORY supersede this variable for a target if they are set. Semicolon-separated list of directories specifying a search path for the find_file() and find_path() commands. txt of a cmake project, and access the generated library within meson context: in your cmake subproject: CMAKE_LIBRARY_PATH¶;-list of directories specifying a search path for the find_library() command. CMAKE_LIBRARY_PATH_FLAG. The downside (apart from being overly complex) is that the macro in the script file doesn't have access to any of the current variables in the main CMake process - you need to pass them too when invoking CMake. Add /tools/cmake to CMAKE_MODULE_PATH and include core modules plus the various helper/third-party scripts. find_path () is a built-in CMake function that searches for a specific file or directory CMAKE_LIBRARY_PATH. These are intended to This can be skipped if NO_CMAKE_PATH is passed or by setting the CMAKE_FIND_USE_CMAKE_PATH to FALSE. e. 13. Either you show your full cmake scripts or you find it on your own. There are some cases where CMake may ask the linker to search for the library (e. When building Qt you can use CMake variables to control the build result. Search paths specified in cmake-specific cache variables. 20. --prefix /path/to/subdir. Set build tools/executables such as default Python interpreter. <prefix>/lib/<arch> if CMAKE_LIBRARY_ARCHITECTURE is set, and <prefix>/lib for each <prefix> in CMAKE_SYSTEM_PREFIX_PATH. With some hacks it almost works. CMake uses the paths in this list as alternative roots to find filesystem items with find_package(), find_library() etc. There are a few purposes of this cache. txt? I've got a bunch of similar ExternalProjects that are called in a loop with the same variables. i. The command has a few modes by which it searches for packages: Module mode. CMAKE_LIBRARY_PATH¶;-list of directories specifying a search path for the find_library() command. Sep 3, 2018 · properties archive_output_directory "${cmake_binary_dir}/lib" library_output_directory "${cmake_binary_dir}/lib" runtime_output_directory "${cmake_binary_dir}/bin" ) In both cases you can append _[CONFIG] to the variable/property name to make the output directory apply to a specific configuration (the standard values for configuration are DEBUG Mar 9, 2023 · In this case, is there a way, within, CMAKE, to (permanently) this this path into the environment path user variable? You could write a script that does the necessary. Feb 16, 2015 · 1. Quoting the manual for find_file: Search paths specified in cmake-specific cache variables. This can be skipped if NO_CMAKE_PATH is passed. May 22, 2015 · A possible fix for this is to export a new LD_LIBRARY_PATH containing the local library folder. txt file so that the library will get built. txt files added with add_subdirectory have access to the variables defined in themselves, and in the parent scope (the toplevel global scope in your example). In order to accomplish that I am specifying paths to: C and C++ compilers (using CMAKE_<LANG>_COMPILER variables), CMAKE_LIBRARY_PATH¶;-list of directories specifying a search path for the find_library() command. CMAKE_SYSTEM_PREFIX_PATH. This command is for the manipulation of paths. cmake-variables (7) ¶. cmake included in the top-level CMakeLists. txt files to specify dependencies, build configurations, and compilation commands. json files) and runs vcpkg install to automatically acquire the project's dependencies. CMAKE_LIBRARY_PATH¶ Semicolon-separated list of directories specifying a search path for the find_library() command. Aug 6, 2011 · > > >> At the same time, the environment variable LIBRARY_PATH is set to >> somewhere/lib. It then worked CMAKE_FIND_ROOT_PATH¶. Useful when cross-compiling Qt to ensure Path used for searching by FIND_LIBRARY(). cmake_path. On most compilers this is “-L”. Search cmake variables defined in the Platform files for the current system. As a direct answer to your question, yes, you can set CMAKE_MODULE_PATH at the command line by running cmake -DCMAKE_MODULE_PATH=/some/path -S /path/to/src -B /path/to/build. CMake uses this file to store a set of global cache variables, whose values persist across multiple runs within a project build tree. The CMAKE_LIBRARY_PATH environment variable may be set to a list of directories to be searched by the find_library() command. Similarly, the CMAKE_LIBRARY_PATH defines where to look for when CMake tries to find an installation of a required external library, i. Instead, you need to set RPATH for the executable - list of directories, "built-in" into the executable itself, where the loader will search for libraries. May 11, 2013 · In CMake, how do I define a PATH-type cache variable that (in Windows, cmake-gui. bashrc ~/. The flag will be used to specify a library directory to the compiler. The target properties ARCHIVE_OUTPUT_DIRECTORY , LIBRARY_OUTPUT_DIRECTORY, and RUNTIME_OUTPUT_DIRECTORY supersede this variable for a target if they are set. I’m porting a plugin for llvm compiler to cmake. On most compilers this is -L. It is also propagated by calls to the try_compile() command into the test project. May 8, 2013 · get_directory_property(MyVar. There is a special variable dedicated to solving this exact problem – CMAKE_MSVCIDE_RUN_PATH. CMAKE_MSVCIDE_RUN_PATH. Talking about distribution the executable or shared library with dynamically linked libraries and CMake build system: SET(CMAKE_BUILD_RPATH_USE_ORIGIN TRUE) This var forces linking with relative path within the build tree, so in result the build directory can be movable. <prefix>/lib/<arch> if CMAKE_LIBRARY_ARCHITECTURE is set, and <prefix>/lib for each <prefix> in CMAKE_PREFIX_PATH; CMAKE_LIBRARY_PATH; CMAKE_FRAMEWORK_PATH; Search paths specified in cmake-specific environment variables. Feb 16, 2024 · I could at best submit an imperfect patch; I don’t know what the values should be for Cygwin and MSYS, and for cross-builds I imagine we need a second variable for the target system. If provided, the –prefix switch of cmake overrides CMAKE_INSTALL_PREFIX. It provides a declarative approach using CMakeLists. Get ESP-IDF git revision and store as IDF_VER. This can be skipped if NO_SYSTEM_ENVIRONMENT_PATH is passed or by setting the CMAKE_FIND_USE_SYSTEM_ENVIRONMENT_PATH to FALSE. port install cmake pkgconfig. This command offers wide possibilities to deal with paths. CMAKE_SYSTEM_FRAMEWORK_PATH Mar 18, 2024 · 5. You can export a variable one level up using: set(Var1 "This is variable 1" PARENT_SCOPE) Generate a Project Buildsystem ¶. so becomes -lfoo ), such as when a shared library is This can be skipped if NO_CMAKE_PATH is passed or by setting the CMAKE_FIND_USE_CMAKE_PATH to FALSE. See also CMAKE_SYSTEM_INCLUDE LIBRARY_OUTPUT_PATH. In short: @squareskittles is right. cmake: XXX_INCLUDE_DIR XXXYYY_INCLUDE_DIR) As it is in this example, XXX_INCLUDE_DIRS is a string with a space in the middle, and, thus, when added in CMakeLists. Functional tests obviously require different toolchain, so I extracted tests into a separate project. By default this is empty. This variable defines how to link a library or framework for the specified <FEATURE> when a LINK_LIBRARY generator expression is used. cmake , looking first in the locations listed in the CMAKE_MODULE_PATH , then among the Find Modules provided by the CMake installation. CMAKE_FIND_USE_CMAKE_PATH. New in version 3. rp un ct ol tr qj nx gm rc ee