Cmake check empty string
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 … 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
Cmake check empty string
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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). WebThe 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 …
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. WebSep 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 …
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 … WebNov 30, 2024 · I would like to be able to just define a cmake variable without giving it a value, similar to how the C preprocessor can define variables and check if the variable is defined. It seems that I have to use -D variable_name= instead of just -D variable_name ? It also seems that If I only check if the variable is defined, cmake-3.17.2 posts a warning …
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 …
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。 hirely malaysiaWebMay 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 … homes for sale on blairs ct st marys gaWebApr 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., … homes for sale on booth lake wiWebMay 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 … homes for sale on black river scWebThe 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_ hirely gmbhWebDec 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 … hire luxury sport carhire luxury yacht greek islands