How to Concatenate String In Cmake?

To concatenate strings in CMake, you can use the set command with the ${} syntax to concatenate two or more strings together. For example, you can concatenate two strings and store the result in a new variable like this:

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set(STR1 "Hello")
set(STR2 "World")
set(CONCATENATED "${STR1} ${STR2}")

In this example, the CONCATENATED variable will contain the string "Hello World". You can then use the CONCATENATED variable in your CMake code or pass it to other CMake functions as needed.

How to concatenate strings in a cross-platform compatible way in CMake?

To concatenate strings in a cross-platform compatible way in CMake, you can use the string() command along with the CONCAT subcommand. Here's an example:

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set(firstString "Hello")
set(secondString "World")

string(CONCAT resultString "${firstString}" " " "${secondString}")

message(STATUS "Concatenated string: ${resultString}")

This code will concatenate the two strings "Hello" and "World" with a space in between, resulting in the output "Hello World". This method works on all platforms supported by CMake.

What is the impact of string concatenation on the overall build time in CMake?

String concatenation in CMake can have a small impact on build time, as it involves manipulating strings during the configuration stage of the build process. However, this impact is usually negligible unless a large amount of string concatenation is being performed. It is important to keep in mind that CMake is primarily used for configuring the build process and generating build files, rather than for executing the actual build process itself. In most cases, the time spent on string concatenation during the configuration stage is minimal compared to the overall build time.

How to concatenate multiple strings in CMake?

In CMake, you can concatenate multiple strings using the ${} syntax with the set() command. Here's an example:

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set(STRING1 "Hello")
set(STRING2 " World")
set(CONCATENATED_STRING "${STRING1}${STRING2}")
message("Concatenated string: ${CONCATENATED_STRING}")

This will output:

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Concatenated string: Hello World

You can also use the string() command with the CONCATENATE subcommand:

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set(STRING1 "Hello")
set(STRING2 " World")
string(CONCATENATED_STRING "${STRING1}" "${STRING2}")
message("Concatenated string: ${CONCATENATED_STRING}")

This will also output:

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Concatenated string: Hello World

These are two ways to concatenate multiple strings in CMake.

How to concatenate strings in a case-sensitive manner in CMake?

In CMake, you can concatenate strings in a case-sensitive manner using the ${<string_variable>} syntax. Here's an example:

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set(STRING1 "Hello")
set(STRING2 "World")

set(CONCATENATED_STRING "${STRING1}${STRING2}")

message(STATUS "Concatenated String: ${CONCATENATED_STRING}")

This will output "HelloWorld" in a case-sensitive manner.

What is the scope of variables involved in string concatenation in CMake?

In CMake, variables involved in string concatenation have global scope by default. This means that they can be accessed and modified from any part of the CMake script. However, CMake also allows for defining variables with different scopes, such as directory scope or function scope, using different CMake commands like set() or set_directory_properties().

When concatenating strings in CMake, it is important to consider the scope of the variables being concatenated to ensure that the desired behavior is achieved. It is also good practice to make use of scope modifiers, such as PARENT_SCOPE or CACHE, when setting variables to ensure proper scoping.

Overall, the scope of variables involved in string concatenation in CMake can vary depending on how the variables are defined and accessed within the CMake script.