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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.)

Hi cmakers, can I create an empty list which evaluates to true? The way I tried they evaluate to false: set(BLAS_LIBRARIES "") # trying to create an empty ...

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).

25.10.2020 · set (mylist "") craig.scott (Craig Scott) October 25, 2020, 9:38pm #3. If you want to be absolutely sure that the variable will evaluate to an empty list (or empty string), use set (mylist ""). The reason is that unsetting a regular variable can unmask a cache variable of the same name. The following shows how this can happen:

An empty path evaluates to false. On Windows hosts, any path that begins with a drive letter and colon (e.g. C: ), a forward slash or a backslash will evaluate to true. This means a path like C:no\base\dir will evaluate to true, even though the non-drive part of the path is relative.

25.11.2011 · [CMake] Checking for empty list Michael Wild themiwi at gmail.com Fri Nov 25 09:32:29 EST 2011. Previous message: [CMake] Checking for empty list Next message: [CMake] steps to add support for new (D) language into CMake? Messages sorted by:

CMake lists can be used to build up configuration fragment files in a modular way ... This cache file is created when CMake is run in an empty build folder.

Oct 25, 2020 · Since a list is represented as a string, an empty list is an empty string: set (mylist "") craig.scott (Craig Scott) October 25, 2020, 9:38pm #3. If you want to be absolutely sure that the variable will evaluate to an empty list (or empty string), use set (mylist ""). The reason is that unsetting a regular variable can unmask a cache variable of the same name.

22.11.2019 · BTW I'd like to run pl-slam and the guide said that: If working with the most recent versions of the MRPT library you might find some issues due to hard refactoring, for which we recommend to use this version instead (the last one we tested):

29.07.2016 · CMake is an excellent cross-platform build tool for automatically generating Unix Makefiles, Windows NMake Makefiles, Microsoft Visual Studio® Solution projects or Apple Xcode® projects for MacOS.It has its own domain specific language and various modules for most commonly used libraries and software frameworks. The most common use of CMake is …

Jun 18, 2020 · You can create an empty list using an empty pair of square brackets [] or the type constructor list(), a built-in function that creates an empty list when no arguments are passed. Square brackets [] are commonly used in Python to create empty lists because it is faster and more concise. I really hope that you liked my article and found it helpful.

Nov 25, 2011 · [CMake] Checking for empty list Michael Wild themiwi at gmail.com Fri Nov 25 09:32:29 EST 2011. Previous message: [CMake] Checking for empty list Next message: [CMake] steps to add support for new (D) language into CMake? Messages sorted by:

Cmake命令之list介绍. 命令格式. list (subcommand <list> [args...]) subcommand为具体的列表操作子命令，例如读取、查找、修改、排序等。<list>为待操作的列表变量，[args...]为对列表变量操作需要使用的参数表，不同的子命令对应的参数也不一致。. list命令即对列表的一系列操作，cmake中的列表变量是用分号 ...

06.02.2019 · 1 Answer1. Show activity on this post. It doesn't seem to work with empty lists, but if you initialize the list with some dummy value, as you did in your second example set (FOO "dummy"), you can continue to use FOO as a list and also append empty elements to it. It's basically your desired approach and workaround combined:

15.03.2021 · But let’s move on before we get too philosophical. CMake takes a different approach. A concrete definition could be formulated as follows: 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.

You create a list of three items instead: "a" , "b" and "c" . Non-list variables are actually lists too (of a single element). Lists can be operated on with the ...

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).

[x265] Issue #545: cmake error: list GET given empty list ... 64-bit, build 1909 CMAKE: 3.17.2 NASM: 2.14.02 Target: MinGW 64-bit \(MSYS2, ...

Otherwise, the list is empty which evaluates to false internally and the last line gives an error. Ideally, there would be a way to create a ...

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 ...

Feb 07, 2019 · 1 Answer1. Show activity on this post. It doesn't seem to work with empty lists, but if you initialize the list with some dummy value, as you did in your second example set (FOO "dummy"), you can continue to use FOO as a list and also append empty elements to it. It's basically your desired approach and workaround combined:

What is the most idiomatic way to initialize an empty list? I have earlier used set(mylist) This works, when I later starts to append items ...

Never use old CMake syntax code for loop constructs: ... declare an empty list: set(mylist) ... Do not quote variables that CMake expects to be a list:.

Basic CMake project. CMake is a meta build system that uses scripts called CMakeLists to generate build files for a ...