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$符号;但if...
3.7 if 语句块 代码语言:javascript 代码运行次数:0 运行 AI代码解释 ## 第一种格式 if(variable) # If variable is `ON`, `YES`, `TRUE`, `Y`, or non zero number else() # If variable is `0`, `OFF`, `NO`, `FALSE`, `N`, `IGNORE`, `NOTFOUND`, `""`, or ends in `-NOTFOUND...
if(variable) # If variable is `ON`, `YES`, `TRUE`, `Y`, or non zero number else() # If variable is `0`, `OFF`, `NO`, `FALSE`, `N`, `IGNORE`, `NOTFOUND`, `""`, or ends in `-NOTFOUND` endif() # If variable does not expand to one of the above, CMake will expa...
首先说明如何修改或创建一个环境变量,使用set(ENV{<variable>} <value>) 指令用以声明,使用unset(ENV{<variable>})来清除某一个环境变量,其中ENV表示环境变量标志性前缀,variable指变量名称,value则为变量值,需要注意的是设定或读取环境变量时,都通过ENV前缀来访问环境变量,读取环境变量值时,要在ENV前加$符号;但...
set(MY_BOOL_VAR ON) # 定义一个布尔变量 if(MY_BOOL_VAR) message(STATUS "The variable is true") else() message(STATUS "The variable is false") endif() 在这个例子中,我们定义了一个布尔变量 MY_BOOL_VAR 并将其设置为真。然后,我们使用 if 语句检查变量的状态并输出相应的消息。这种对真实和虚...
16execute_process(17COMMAND18${PYTHON_EXECUTABLE}"-c""import re, numpy; print(re.compile('/__init__.py.*').sub('',numpy.__file__))"19RESULT_VARIABLE _numpy_status20OUTPUT_VARIABLE _numpy_location21ERROR_QUIET22OUTPUT_STRIP_TRAILING_WHITESPACE23)2425if(NOT _numpy_status)26set(NumPy ${...
thestring(CONCAT VELOX_PROTOBUF_SOURCE_URL "xx" "xx")in theprotobuf.cmakefile will causeif(DEFINED ${var_name})to return true, so the URL set by the env variable will never take effect. Could you please let me know which method you are trying to adapt the call toset_with_default?
#set environment variable SET(TEST_MATH ${DIR_SRCS} ) #set extern libraries SET(LIBRARIES libm.so ) # set output binary path SET(EXECUTABLE_OUTPUT_PATH ${PROJECT_BINARY_DIR}/bin) SET(FS_BUILD_BINARY_PREFIX "Yfs") #add executable file ADD_EXECUTABLE(${FS_BUILD_BINARY_...
字母表顺序比较：if (variable STRLESS string)if (string STRLESS string)if (variable STRGREATER string)if (string STRGREATER string)if (variable STREQUAL string)if (string STREQUAL string)示例：if(MSVC)set(LINK_LIBS common)else()set(boost_thread boost_log.a boost_system.a)end iftarget_link_...
set(CMAKE_CXX_STANDARD_REQUIRED TRUE) # Define project name project(facedetect_project) # Find OpenCV, you may need to set OpenCV_DIR variable # to the absolute path to the directory containing OpenCVConfig.cmake file # via the command line or GUI ...