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It's important to know how CMake distinguishes between lists and plain strings. When you write: set (VAR "a b c") you create a string with the value "a b c". But when you write this line without quotes: set (VAR a b c) You create a list of three items instead: "a", "b" and "c". Non-list variables are actually lists too (of a single element).

if(<variable|string> IN_LIST <variable>). New in version 3.3: True if the given element is contained in the named list variable.

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 …

Always use if(DEFINED varname) to check if a variable is set: if (DEFINED myvar) # ... endif(). Do not quote variables that CMake expects to be a list:.

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.

New in version 3.3: True if the given element is contained in the named list variable. ... The if command was written very early in CMake's history, predating the ${} variable evaluation syntax, and for convenience evaluates variables named by …

I can use LIST(LENGTH MYLIST LISTCOUNT) with an extra variable LISTCOUNT. but. Post by Daniel Dekkers isn't there a single command? if (MYLIST)

Mar 15, 2021 · A recent addition to the foreach family is the IN ZIP_LISTS form: set(foo 1 2 3) set(bar a b c) foreach(al num IN ZIP_LISTS foo bar) message("$ {al}: $ {num}") endforeach() $ cmake -S . -B build 1: a 2: b 3: c. This may further reduce the number of use cases for index-based iteration in your CMake code.

As CMake processes the listfiles in your project this variable will always be set to the directory where the listfile which is currently being processed ( CMAKE_CURRENT_LIST_FILE) is located. The value has dynamic scope. When CMake starts processing commands in a source file it sets this variable to the directory where this file is located. When CMake finishes processing commands from the file it restores the previous value.

With CMake 3.3 or later, the if command supports an IN_LIST operator, e.g.: if ("bar" IN_LIST _list) ... endif().

If you are not familiar with CMake, please read the previous article ... which means that if you pass the variable to a list aware command, ...

Lists can be operated on with the list() command, which allows concatenating lists, searching them, accessing arbitrary elements and so on (documentation of ...

Lists are an important component of most CMakeLists.txt files. Lists are built automatically from arguments to commands and macros. Thus, we ...

15.03.2021 · A CMake list is a semicolon-separated sequence of elements. And since everything in CMake is a string, this means that a list is a semicolon-separated sequence of strings, making itself a string. Because who needs a type system, right? This may also be true the other way around – a string may be a list, but isn’t necessarily one.

Introduction ¶. The list subcommands APPEND, INSERT, FILTER, PREPEND , POP_BACK, POP_FRONT, REMOVE_AT, REMOVE_ITEM , REMOVE_DUPLICATES, REVERSE and SORT may create new values for the list within the current CMake variable scope. Similar to the set () command, the LIST command creates new variable values in the current scope, even if the list ...

26.04.2014 · In CMake's wiki I found a LIST_CONTAINS macro, but the wiki page is outdated. Is this still the best way to go or has CMake gained new capabilities? cmake. Share. Follow asked Apr 27, 2014 at 12:02. usr1234567 usr1234567. 18.9k 14 14 gold badges 104 104 silver badges 119 119 bronze badges.

tweak]]] ). if(<variable|string> IN_LIST <variable>): True if the given element is contained in ...

A list in cmake is a ; separated group of strings. To create a list the set command can be used. For example, set (var a b c d e) creates a list with a;b;c;d;e, and set (var "a b c d e") creates a string or a list with one item in it. (Note macro arguments are not variables, and therefore cannot be used in LIST commands.)

Apr 27, 2014 · With CMake 3.3 or later, the if command supports an IN_LIST operator, e.g.: if ("bar" IN_LIST _list) ... endif() For older versions of CMake, you can use the built-in list(FIND) function: list (FIND _list "bar" _index) if (${_index} GREATER -1) ... endif()