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The 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 shown in the above signatures.

See the if() command, especially for the syntax and logic of the <condition>.

CMake is a tool for defining and managing code builds, primarily for C++. CMake is a cross-platform tool; the idea is to have a single definition of how the project is built - which translates into specific build definitions for any supported platform.

28.01.2020 · CMake简介 CMake 是做什么的？CMake是一套类似于automake的跨平台辅助项目编译的工具。我觉得语法更加简单易用。 CMake的工作流程 CMake处理顶级目录的CMakeLists.txt（CMake的配置文件，配置了子目录，编译目标，编译依赖等等），最后根据配置生成相应的MakeFile。。 使用make命令既可以进行编

If the result is true, then the commands in the if block are executed. ... The following syntax applies to the condition argument of the if , elseif and ...

Control Flow

Feb 14, 2022 · CMake non-regular variables like cache and environment variables need $ prefix to be evaluated.

Conditional Statement (if) ... There are two allowable syntaxes: if(something) do something else(something) # the argument must match the if(...) ...

The 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 shown in the above signatures. Note that normal variable evaluation with $ {} applies before the if command even receives the arguments. Therefore code like

If KEYWORD is a generator expression or variable that evaluates to 0 or 1, value is substituted if 1 and not if 0. You can nest generator expressions, and you ...

28.07.2014 · CMake----if与option使用小记. 在CMake中if语法比较简单，if后面括号中的参数随着CMake版本的推进，在else和endif中也可以不用写了。. 对于if语法，比较常用的就是字符串比较了，这里个人简单用到过两种，一种是这个变量有没有定义过。. 有两种写法可以验证. 两种都 ...

set(A "") set(B "A") # save name of the variable if(${B} STREQUAL "") message("Value of ${B} is an empty string") endif(). If a CMake policy CMP0054 is set ...

That's because the value of the option is stored in the cache ( CMakeCache.txt ). If you change the default value in the CMakeLists but the ...

CMake is an open-source, cross-platform family of tools designed to build, test and package software. CMake is used to control the software compilation process using simple platform and compiler independent configuration files, and generate native makefiles and workspaces that can be used in the compiler environment of your choice.

Dec 15, 2021 · In Visual Studio 2022 and Visual Studio 2019 version 16.10 and later, Tools > Options > CMake > General has a single option to enable CMakePresets.json integration. The following table indicates when CMakePresets.json is used instead of CMakeSettings.json to drive CMake configuration and build in Visual Studio 2022 and Visual Studio 2019 version 16.10 and later.

Learn how to define variables with set and use them with the ${} operator for variable references. Learn the syntax for conditionals in CMake: if - elseif - ...

Hi, I've just had a CMakeLists.txt fail to work as expected because somebody was testing to see whether an environment variable was set with the syntax: if

CMake normal variables can be used without ${} evaluation in several contexts including if() statements. Cache and Environment variables do need ...

Sep 25, 2018 · The text was updated successfully, but these errors were encountered:

22.10.2015 · The cmake online documentation is great, make liberal use of it. cmake:if command breaks down the whole thing. – grim. Oct 15, 2013 at 1:20. 2. You can answer your own question and mark it as "solved" =). – JonasVautherin. Sep 30, 2014 at 13:16. Add a comment |

Conditionally execute a group of commands. ... Evaluates the given expression. If the result is true, the commands in the THEN section are invoked. Otherwise, the ...

26.08.2020 · CMake supports the usual AND, OR and NOT logical operators, as well as parentheses to control order of precedence. # Logical operators if (NOT expression) if (expression1 AND expression2) if (expression1 OR expression2) # Example with parentheses if (NOT (expression1 AND (expression2 OR expression3))) 1 2 3 4 5 6 按照通常的约定，首先计算 …

Oct 23, 2015 · The cmake online documentation is great, make liberal use of it. cmake:if command breaks down the whole thing. – grim. Oct 15, 2013 at 1:20. 2.