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I have a problem using option together with if-else statement in cmake. project ...

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

if — CMake 3.23.0-rc2 Documentation if ¶ Conditionally execute a group of commands. Synopsis ¶ if (<condition>) <commands> elseif (<condition>) # optional block, can be repeated <commands> else () # optional block <commands> endif () Evaluates the condition argument of the if clause according to the Condition syntax described below.

Aug 26, 2020 · 1 The ubiquitous if () command provides the expected if-then-else behavior and looping is provided through the foreach () and while () commands. The if () Command if (expression1) # commands ... elseif (expression2) # commands ... else () # commands ... endif () 1 2 3 4 5 6 7 Basic Expressions 最简单的 if 语句是如下： if (value) 1

elseif — CMake 3.23.0-rc4 Documentation elseif ¶ Starts an elseif portion of an if block. elseif (<condition>) See the if () command, especially for the syntax and logic of the <condition>.

I had a similar problem and was able to solve it using a slightly different approach. I needed some compilation flags to be added in case cmake was invoked with an option from the command line (i.e cmake -DUSE_MY_LIB=ON).If the option was missing in the cmake invocation I wanted to go back to default case which was turning the option off.. I ran into the same issues, where the …

Example of using an if command with NO / YES constants and variables with NO / YES ... If a CMake policy CMP0054 is set to OLD or not present at all (before ...

The elseif and else sections are optional. You may have multiple elseif clauses. Note that the expression in the else and endif clause is optional. Long ...

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

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 - ...

generator-expressions are really powerful, but a bit odd and specialized. Most CMake commands happen at configure time, include the if statements seen above.

I needed some compilation flags to be added in case cmake was invoked with an option from the command line (i.e cmake -DUSE_MY_LIB=ON ). If the option was ...

The if command was written very early in CMake's history, predating the ${} variable evaluation syntax, and for convenience evaluates variables named by …

Evaluates the condition argument of the if clause according to the Condition syntax described below. If the result is true, then the commands in the if ...

26.08.2020 · 转载makelists语法 一、常用命令 1.指定 cmake 的最小版本 cmake_minimum_required(VERSION 3.4.1) 这行命令是可选的，我们可以不写这句话，但在有些情况下，如果 CMakeLists.txt 文件中使用了一些高版本 cmake 特有的一些命令的时候，就需要加上这样一行，提醒用户升级到该版本之后再执行 cmake。

else ¶ Starts the else portion of an if block. else ([<condition>]) See the if () command.

else¶. Starts the else portion of an if block. else([<condition>])See the if() command.

Jan 28, 2020 · CMake 专栏收录该内容 7 篇文章 18 订阅 订阅专栏 一、基本语法 if(<condition>) <commands> elseif(<condition>) # optional block, can be repeated <commands> else() # optional block <commands> endif() 1 2 3 4 5 6 7 如果需要对项目进行有条件的编译，则需要用到if-else语句。 二、基本用法 比如需要根据操作系统执行不同的代码：

If the option was missing in the cmake invocation I wanted to go back to default case which was turning the option off. I ran into the same issues, where the value for this option was being cached between invocations: cmake -DUSE_MY_LIB=ON .. #invokes cmake and puts USE_MY_LIB=ON in CMake's cache. cmake ..