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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 …

Examples | CMake. The following example demonstrates some key ideas of CMake. Make sure that you have CMake installed prior to running this example (go here for instructions). There are three directories involved. The top level directory has two subdirectories called ./Demo and ./Hello. In the directory ./Hello, a library is built.

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 ...

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

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 …

Examples | CMake. The following example demonstrates some key ideas of CMake. Make sure that you have CMake installed prior to running this example (go here for instructions). There are three directories involved. The top level directory has two subdirectories called ./Demo and ./Hello. In the directory ./Hello, a library is built.

CMake » 3.23.0-rc3 ... The conditions inside the parenthesis are evaluated first and then the remaining condition is evaluated as in the other examples. Where there ...

CMake Examples Introduction. CMake is a cross-platform open-source meta-build system which can build, test and package software. It can be used to support multiple native build environments including make, Apple's xcode and Microsoft Visual Studio.

22.10.2015 · Browse other questions tagged cmake expression conditional or ask your own question. The Overflow Blog How sharding a database can make it faster

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

Since all variables in CMake are strings, the syntax for if and foreach appears in a few different variants. if. if(<condition>) ...

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 ...

if / else / endif looks like this in CMake: minimal-cmake-if-else-endif-example.txt Copy to clipboard⇓ Download. if(myvar).

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 ...

Feb 22, 2017 · CMake will make sure to first build test before linking it to myapp. Including external libraries using other build systems. While CMake enjoys increasing interest, there are still plenty of libraries using native build systems like Unix Makefiles. You can make use of them in your CMake project without having to re-write their build scripts.

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 ..

This can be surprising if you do not use the CACHE signature, as it will act as if the cache variable does not exist. For example set(MYVAR ...

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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 ...

Some expressions allow multiple values, separated by commas. If you want to put a compile flag only for the DEBUG configuration, for example, you could do: