Cmake check if variable is set

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August undefined, 2024

WebVariables in CMake are directory, function, and block scoped.add_subdirectory creates a new directory "child scope". You can set a variable in the parent scope of a given scope by using the PARENT_SCOPE argument of the set command.. In your specific use-case with trying to set source files for a target, if your cmake_minimum_version is greater than or … WebAug 1, 2024 · How do I check if an environment variable is set in cmake bash cmake environment-variables 39,623 Solution 1 You CMake code is correct. The problem is most likely that you only set the environment variable in your shell but did not export it. Run the following before invoking cmake: export THING Solution 2

cmake command line -D and using DEFINED

WebWe will cover variables first. A local variable is set like this: set (MY_VARIABLE "value") The names of variables are usually all caps, and the value follows. You access a variable by using ${}, such as ${MY_VARIABLE}. 1 CMake has the concept of scope; you can access the value of the variable after you set it as long as you are in the same ... WebIf CMAKE_TOOLCHAIN_FILE is set, read it at least once. It may be read multiple times and it may also be read again when enabling languages later (see below). Set the variables describing the host and target platforms. Language-specific variables might or might not be set at this point. msu food science degree

If value not equal in cmake 2.8 - Stack Overflow

WebThe normal set command only sets the cached variable if it is not already set - this allows you to override cached variables with -D. Try: cmake -DMY_CACHE_VAR="command line" -P cache.cmake You can use FORCE to set a cached variable even if it already set; this should not be very common. http://doc.aldebaran.com/1-14/qibuild/contrib/cmake/coding_guide.html WebOct 25, 2011 · If there is a variable named test, then we do variable-value comparison: if (test STREQUAL "") is equivalent to: if ("$ {test}" STREQUAL "") (It is this way for backwards compatibility with IF commands that were written before we even had $ {test} variable expansion in the CMake language. Years ago at this point...) msu food stores log in

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WebA tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. WebAug 3, 2015 · Question: Why does the second check for variable definition report the variable is not defined even though it is defined? Surprisingly, the value of the variable is also printed correctly! Surprisingly, the value of the variable is also printed correctly! how to make mods for pc gamesWebNote the bang in the first line of the documentation of the function. The rest is straightforward \arg: this represent a function parameter, the name is the name of the parameter you are documenting. msu food service

"WebSee also the CMAKE_SYSTEM_NAME variable. $ 1 if CMake's platform id matches any one of the entries in comma-separated list platform_ids, otherwise 0. See also the CMAKE_SYSTEM_NAME variable. Compiler Version ¶ See also the CMAKE__COMPILER_VERSION variable, which is closely related to the … " - Cmake check if variable is set

Cmake check if variable is set

Variables and the Cache · Modern CMake - GitLab

WebDec 24, 2024 · As you may have discovered, CMake stores the path of the selected compiler inside a variable called CMAKE_CXX_COMPILER. This variable can be set in two ways: Using a switch on the command...

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WebSep 8, 2024 · According to CMake Variable documentation you have Directory, Function, and cache scope. Using include () doesn’t create a new scope it is supposed to keep the current directory scope. add_subdirectory () is supposed to add an new Directory level. So in a function PARENT_SCOPE should always work. WebCHECK_VARIABLE_EXISTS (VAR VARIABLE) VAR - the name of the variable VARIABLE - variable to store the result Will be created as an internal cache variable. This macro is only for C variables. The following variables may be set before calling this macro to modify the way the check is run: CMAKE_REQUIRED_FLAGS string of compile …

WebThe if command was written very early in CMake's history, predating the ${} variable evaluation syntax, and for convenience evaluates variables named by its arguments as … WebJul 31, 2012 · 1 Answer Sorted by: 96 You're close! The correct syntax for IF is IF (NOT ) So in your specific case, you want IF (NOT $ {CMAKE_SYSTEM_NAME} MATCHES "Linux") Share Improve this answer Follow edited Sep 30, 2024 at 4:52 user 10.8k 6 23 81 answered Jul 31, 2012 at 19:36 Fraser 73.3k 19 235 214 Add a comment …

WebSep 21, 2016 · Cmake will silently continue. What I would like to do is the telling cmake that when reading the value of a variable it should always check if the variable is defined and fail if it isn't. For compatibility there must be away to enable this option only for the current cmake-file, otherwise it won't be possible to include existing cmake-file ... WebAug 1, 2024 · How do I check if an environment variable is set in cmake; How do I check if an environment variable is set in cmake. bash cmake environment-variables. 39,623 …

WebIf we set the actual value of an option while calling CMake that will be overwritten. There is no need to remove CMakeCache.txt. We need to remove CMakeCache.txt only if we decide not to specify the actual value and we want to use the default, while in a previous run of cmake we did specify a value different than the default one. – Perennialista

WebUse the syntax $ENV {VAR} to read environment variable VAR. To test whether an environment variable is defined, use the signature if (DEFINED ENV {}) of the if () command. For general information on environment variables, see the Environment Variables section in the cmake-language (7) manual. Previous topic CACHE Next topic msu food scienceWeb1> [CMake] No CMAKE_COMPILER could be located. 1> [CMake] 1> [CMake] Tell CMake where to find the compiler by setting either the environment. 1> [CMake] variable “CXX” or the CMake file entry CMAKE_CXX_COMPILER to the complete path. 1> [CMake] to the compiler, or to the name if it is in the PATH. msu football 2017 resultsWebNov 27, 2024 · CMP0077 is relevant here, if that policy is turned on (it was added in 3.13) then setting variables before calling FetchContent_MakeAvailable will cause calls to option in the subproject to basically do nothing. This is nice as it means users of your project don’t even get cache entries for the subproject options you’re forcing. how to make mods for snowrunnerWebNov 30, 2024 · CMake variables do not have such a state. They either have a value or are undefined. The value can be empty (which might be what you’re looking for). -Dvariable_name= will set it to the empty string. CMake differences 3.18 might consider the variable “used” in an if (DEFINED) check. I’m not sure what would have changed that. how to make mods for sfs 💻WebSep 8, 2024 · According to CMake Variable documentation you have Directory, Function, and cache scope. Using include () doesn’t create a new scope it is supposed to keep the … how to make mods for rain worldWebDec 24, 2024 · Build type variables and their corresponding compiler flags can be accessed from within the cache. Toggle advanced mode after launching either ccmake or cmake-gui to check them out. Selecting a … how to make mods for planet zooWebMay 23, 2024 · So, CMake provides the keyword PARENT_SCOPE to set a variable in the parent scope. You can send variable name as a function parameter. The function will set the variable in the parent... msu food waste