Cmake check empty string

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August undefined, 2024

WebAn empty list is an empty variable, and evaluates to FALSE. So you can use. Yes. If you RTFM about the IF () command you see that you can either use. the variable name MYLIST or the variable value $ {MYLIST}. AFAIK for this. kind of test you would need to put the latter in quotes, however. ... WebJul 16, 2015 · In cmake, a list is represented by a string with the list elements separated by semicola. I can pass an empty list as "", a list of one element as "foo", and a list of multiple elements as, e.g., "foo1;foo2;foo3". Even passing a list of two empty elements as ";" works as expected. But how do I pass a list with one single empty element?

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WebFeb 8, 2011 · You ran into a rather annoying "it's not a bug, it's a feature" behavior of CMake. As explained in the documentation of the if command:. The if command was written very early in CMake's history, predating the ${} variable evaluation syntax, and for … WebGet an element from at the location given by the list of arguments. Array and object elements will be returned as a JSON string. Boolean … harvard glee club facebook

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WebA tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. WebAn empty list is an empty variable, and evaluates to FALSE. So you can use. Yes. If you RTFM about the IF () command you see that you can either use. the variable name … WebThe toolchain file may be re-read when enabling a language for the first time. New in version 3.15: For every project () call regardless of the project name, include the file named by CMAKE_PROJECT_INCLUDE , if set. If the project () command specifies as its project name, include the file named by CMAKE_PROJECT_ harvard glass flower museum

How to pass a list with one empty element in cmake?

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WebIf you were to run cmake -L or cmake -LH, you would see all the cached variables and descriptions. The normal set command only sets the cached variable if it is not already set - this allows you to override cached variables with -D. Try: cmake -DMY_CACHE_VAR="command line" -P cache.cmake. You can use FORCE to set a … WebJun 24, 2015 · Lists in CMake are just strings with semicolons delimiters and therefore the quotation-marks are important. set (MyVar a b c) is "a;b;c" and set (MyVar "a b c") is "a b c". The recommendation is that you always use quotation marks with the one exception when you want to give a list as list. Generally prefer the list () command for handling lists. harvard glee club ticketsWebJun 28, 2024 · Looks like ENABLE_LIBCXX interpreted as string, not as a variable name (even being unquoted)… ??? harvard glass flowers

"WebIt'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). " - Cmake check empty string

Cmake check empty string

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WebFalse if the constant is 0, OFF, NO, FALSE, N, IGNORE, NOTFOUND, the empty string, or ends in the suffix -NOTFOUND. Named boolean constants are case-insensitive. If the … WebOct 25, 2011 · [prev in list] [next in list] [prev in thread] [next in thread] List: cmake Subject: Re: [CMake] Checking for empty string From: David Cole

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WebOct 25, 2011 · Which can be considered expected behaviour if an empty variable is not the empty string, but both are "NOT test". Something like QString::null() vs. QString::empty(). You just have to know about it's suptle differences. Eike WebRe: [cmake-developers] C++11/C++14 doesn't work in check_cxx_source_compiles. Roman Wüger Thu, 24 Nov 2016 10:43:56 -0800

WebApr 12, 2024 · Basic CMake usage ¶. This section explains basic aspects of CMake which you may need in your day-to-day usage. CMake comes with extensive documentation, in the form of html files, and as online help accessible via the cmake executable itself. Execute cmake--help for further help options.. CMake allows you to specify a build tool (e.g., … WebOct 25, 2024 · When part of a project’s CMakeLists.txt file, the above would print the following: Note how using set (MyVar) unset the non-cache variable and re-exposed the …

WebApr 10, 2024 · CMAKE_BUILD_TYPE seems to evaluate to empty string even though I call init_all / init.cmd with the right params. Perhaps something is out of ... I actually wasn't able to get the repo building anymore using the instructions in the README... WebApr 11, 2024 · 如果这一步安装失败，显示The file has been downloaded incorrectly的话，我们就去下载离线版本。Threads： Windows 选择 win32 ， Linux、Unix、Mac OS 选 posix。architecture：电脑系统是 64位的，选 x86_64；回到我们要cmake的地方，把之前生成错误的build里的文件删掉。Exception：64位选seh，32位选sjlj。

WebMay 28, 2014 · Additionally I added variable_watch(CMAKE_BUILD_TYPE) to my main CMakeLists.txt to check whether the value get's overridden somewhere. But the first output is a READ_ACCESS in my main Additionally I added variable_watch(CMAKE_BUILD_TYPE) to my main CMakeLists.txt and the value there …

WebDec 24, 2024 · 3. Inspecting the Default Build Types. This section will focus on inspecting build types and their corresponding compiler flags. The CMake BUILD_TYPE variable specifies which build type configuration is … harvard glass flowers exhibitWebSep 24, 2024 · Hm, among CMake functions which I know, an empty string ( "") is accepted only as a positional parameter, so you may define the function as function (x … harvard global advisory councilWebAnd then this still tells me "test" is not the empty string. Which can be considered expected behaviour if an empty variable is not the empty string, but both are "NOT test". harvard global finance case competitionWebMay 22, 2024 · Now, if we define NAME on the cmake command line using the -D option, the script will use it: $ cmake -DNAME=Newman -P hello.txt Hello Newman! When a variable is undefined, it defaults to an empty string: $ cmake -P hello.txt Hello ! To define a variable inside a script, use the set command. The first argument is the name of the … harvard glass plantsWebOct 25, 2011 · Previous message: [CMake] Checking for empty string Next message: [CMake] Checking for empty string Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] harvard global health and population harvard glass flowers museum hoursWebThe above would expand to OLD_COMPILER if the CMAKE_CXX_COMPILER_VERSION is less than 4.2.0.. Whitespace And Quoting ¶. Generator expressions are typically parsed after command arguments. If a generator expression contains spaces, new lines, semicolons or other characters that may be interpreted as command argument … harvard glee club