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Refer to the command documentation to know if it is the case. The syntax for generator expressions is the following: $<condition:true_string>.

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

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

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.

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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 ...

Example of using an if command with NO / YES constants and variables with NO ... [control-structures]> cmake -Hif-simple -B_builds Condition 1 Condition 3 ...

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 ...

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

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 ...

14.02.2022 · CMake non-regular variables like cache and environment variables need $ prefix to be evaluated.

Never use old CMake syntax code for loop constructs: # NO if(foo) # ... else(foo) # ... endif(foo) # YES if(foo) # ... else() # ... endif().

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 ...

How can we achieve more control over the build system generated by CMake? ... Learn the syntax for conditionals in CMake: if - elseif - else - endif.