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This means that the regular expression ^ab+d$ matches abbd but not ababd, and the regular expression ^(ab|cd)$ matches ab but not abd. CMake language Escape Sequences such as \t , \r , , and \\ may be used to construct literal tabs, carriage returns, newlines, and backslashes (respectively) to pass in a regex.

Then boolean NOT operators and finally boolean AND and then OR operators will be ... if the given string or variable's value is a valid number and equal to ...

COMPARE EQUAL/NOTEQUAL/LESS/GREATER will compare the strings and store true or false in the output variable. ASCII will convert all numbers into corresponding ...

Then boolean NOT operators and finally boolean AND and then OR operators ... True if the given string or variable's value is a valid number and equal to ...

matches - cmake string not equal. CMake compare to empty string with STREQUAL failed (1). You ...

Feb 16, 2015 · In cmake, how can I check if a string token is included in another string? In my case, I would like to know if the name of the compiler contains the string "Clang" (e.g. "clang", "AppleClang", .....

格式： 例子： strequal 是 cmake 的关键字，用于字符串比较，相同返回 true ${cmake_source_dir} 是 cmake 的自保留变量（拿来用就可以，含义已经确 02-cmake语法-if、条件表达 - 路边的十元钱 …

Get an element from <json-string> at the location given by the list of <member|index> arguments. Array and object elements will be returned as a JSON string. Boolean elements will be returned as ON or OFF. Null elements will be returned as an empty string. Number and string types will be returned as strings.

And 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". Something like QString::null() vs. QString::empty(). You just have to know about it's suptle differences. Eike

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 convenience evaluates variables named by its arguments as shown in the above signatures.

20.02.2020 · 可能是它的错误(因为它使用Xcode进行打印，而不是使用make进行打印)？ 还是有一些特殊的变量？ cmake：2.8.12、2.8.11.2

May 21, 2013 · CMake does not find Visual C++ compiler Hot Network Questions What is the name of the tool which involves a ball inside a sealed container that is shaken to grind up spices?

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 convenience evaluates variables named by its arguments as shown in the above signatures.

CMakeの値はすべて文字列型ですが、この条件式の文脈では以下の値がBoolean ... EQUAL・LESS・GREATERなど. NOT ... <string> MATCHES <regexp>

<value>) string(JSON <out-var> [ERROR_VARIABLE <error-var>] EQUAL <json-string1> ... If the <substring> is not found, a position of -1 is returned.

if(DEFINED <name>|CACHE{<name>}|ENV{<name>}). True if a variable, cache variable or environment variable with given <name> is defined. The value of the variable does ...

Binary tests such as EQUAL, LESS, LESS_EQUAL, GREATER, GREATER_EQUAL, STREQUAL, STRLESS, STRLESS_EQUAL, STRGREATER, STRGREATER_EQUAL, VERSION_EQUAL, VERSION_LESS, VERSION_LESS_EQUAL, VERSION_GREATER, VERSION_GREATER_EQUAL, and MATCHES. Unary logical operator NOT. Binary logical operators AND and OR, from left to right, without any short-circuit.

Policy CMP0054 is not set to NEW and the string's value happens to be a ... True if the given string or variable's value is a valid number and equal to that ...

parameters, for the sole purpose of string interpolation and preventing whitespace from splitting a parameter. Cmake commands do not see these quotes. Therefore, STREQUAL can never know the difference between "baz" and baz. So, STREQUAL treats a parameter as a variable name if it is defined, but as a string value if it is not.

FUBARTEST is >> actually a cache variable defined by the root CMakeLists.txt file. In my >> real test case, my STREQUAL statement is failing ...

Cmake commands do not see these >> quotes. Therefore, STREQUAL can never know the difference between "baz" >> and >> baz.

You're close! The correct syntax for IF is. IF(NOT <expression>). So in your specific case, you want. IF(NOT ${CMAKE_SYSTEM_NAME} MATCHES ...

+CMake" matchResultVar "People should use CMake") 105 if(NOT "${matchResultVar}" STREQUAL "People should use CMake") 106 message(SEND_ERROR "string(REGEX ...

Feb 15, 2018 · This answer is not useful. Show activity on this post. Usually, in regular expressions "*" means "repeat preceding zero or more times". CMake is not exception. For match at the end of string, use $: CMAKE_SOURCE_DIR MATCHES "MyFolderName$". CMake regular expressions are described here. Share. Follow this answer to receive notifications.