首先说明如何修改或创建一个环境变量,使用set(ENV{<variable>} <value>)指令用以声明,使用unset(ENV{<variable>})来清除某一个环境变量,其中ENV表示环境变量标志性前缀,variable指变量名称,value则为变量值,需要注意的是设定或读取环境变量时,都通过ENV前缀来访问环境变量,读取环境变量值时,要在ENV前加$符号;但
-misc-non-private-member-variables-in-classes,-readability-identifier-naming'# Note that the readability-identifier-naming check is disabled, there are too# many violations in the codebase and they create too much noise in clang-tidy# results.# Naming settings are kept for documentation purposes ...
使用unset(ENV{<variable>})来清除某一个环境变量,其中ENV表示环境变量标志性前缀,variable指变量名称,value则为变量值,需要注意的是设定或读取环境变量时,都通过ENV前缀来访问环境变量,读取环境变量值时,要在ENV前加$符号;但if判断是否定义时,不用加$符号。
string(COMPARE LESS <string1> <string2> ) string(COMPARE GREATER <string1> <string2> ) string(COMPARE EQUAL <string1> <string2> ) string(COMPARE NOTEQUAL <string1> <string2> ) string(COMPARE LESS_EQUAL <string1> <string2> ) string(COMPARE GREATER_EQUAL <string1> <string2> ) 列表操...
IF(variable STREQUAL string) IF(string STREQUAL string) IF(DEFINED variable)#如果变量被定义,为真。 # 一个小例子,用来判断平台差异: IF(WIN32) MESSAGE(STATUS “This is windows.”) # 作一些 Windows 相关的操作 ELSE(WIN32) MESSAGE(STATUS “This is not windows”) ...
aux_source_directory( <variable>) 因此,可以修改 CMakeLists.txt 如下: 1# CMake 最低版本号要求23cmake_minimum_required (VERSION2.8)45# 项目信息67project (Demo2)89# 查找当前目录下的所有源文件1011# 并将名称保存到 DIR_SRCS 变量1213aux_source_directory(. DIR_SRCS)1415# 指定生成目标1617add_...
if(DEFINEDENV{CMAKE_PATH}) message("CMAKE_PATH_1: $ENV{CMAKE_PATH}") else() message("NOT DEFINED CMAKE_PATH VARIABLES") endif() # 定义测试函数,在函数中新定义环境变量 function(test_env_variable) # 访问环境变量CMAKE_PATH message("CMAKE_PATH_2: $ENV{CMAKE_PATH}") ...
if (string MATCHES regex):给定的字符串能够匹配正则表达式regex时为真。 1.21.2 数字比较 if (variable LESS number):如果variable小于number时为真; if (string LESS number):如果string小于number时为真; if (variable GREATER number):如果variable大于number时为真; ...
, YES, TRUE, Y, or a non-zero number. False 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 argument is not one of these constants, it is treated as a variable....
Checking if a variable is valid (defined and not empty) in CMake is annoying and error-prone. This function does it for you. Syntax is_valid(VARIABLE_TO_CHECK OUTPUT_BOOL) Arguments: VARIABLE_TO_CHECK : The variable which you would like checked OUTPUT_BOOL : A variable that after the ...