#if not defined(BUG_HERE) #define BUG_HERE “bug” #endif #if !defined(COMPARE1) #define COMPARE1 “Compare1” #endif #ifndef COMPARE2 #define COMPARE2 “Compare2” #endif int main(int argc, const char** argv) { printf(COMPARE1); printf(COMPARE2); printf(BUG_HERE...
cmake -B build -DBUILD_SHARED_LIBS:BOOL=ON if (NOT DEFINED BUILD_SHARED_LIBS) set(BUILD_SHARED_LIBS OFF) endif() 动态库无法链接静态库 当我们要编译一个 so 提供给外部使用,这个 so 本身依赖一些第三方库。但是我们却希望 so 的使用者不用关心该 so 对其他库的依赖。很自然的是会想到在编译 so...
if(DEFINEDMY_VARIABLE)message("MY_VARIABLE is defined.")else()message("MY_VARIABLE is not defined.")endif() 以上的代码会检查MY_VARIABLE是否被定义。如果MY_VARIABLE被定义了,就会打印出"MY_VARIABLE is defined.";如果MY_VARIABLE没有被定义,就会打印出"MY_VARIABLE is not defined."。 变量的值可以通...
if(NOT DEFINED CMAKE_INSTALL_SYSTEM_RUNTIME_LIBS_NO_WARNINGS) set(CMAKE_INSTALL_SYSTEM_RUNTIME_LIBS_NO_WARNINGS ON) endif() if(CMake_INSTALL_DEPENDENCIES) include(${CMake_SOURCE_DIR}/Modules/InstallRequiredSystemLibraries.cmake) endif() set(CPACK_PACKAGE_DESCRIPTION_SUMMARY "CMake ...
(1)一元操作符,例如:EXISTS、COMMAND、DEFINED等 (2)二元操作符,例如:EQUAL、LESS、GREATER、STRLESS、STRGREATER等 (3)NOT(非操作符)、AND(与操作符)、OR(或操作符) 操作符优先级:一元操作符 >二元操作符 > NOT > AND、OR 常用操作符介绍: if(NOT expression) 为真的前提是 expression为假 ...
# CMakeLists.txtif(YES)message("YES")endif()if(NOTFOUND)else()message("Not found")endif() # 命令行中执行cmake.后的输出 YES Not found if(<variable>) 如果给定的变量有定义,且值不是0,OFF,NO,FALSE,N,IGNORE,NOTFOUND,空字符串,以NOTFOUND为后缀时为真; ...
if(NOT DEFINED ENV{VAR})message("NOT DEFINED")endif() This code prints nothing even if VAR is not defined. But this one works fine. if(DEFINED ENV{VAR})message("DEFINED")else()message("NOT DEFINED")endif() Windows, cmake version 3.21.1...
if(DEFINED CMAKE_MATCH_1) string(STRIP "${CMAKE_MATCH_1}" _CONAN_INFO_COMPILER_VERSION) set(${CONAN_INFO_COMPILER_VERSION} ${_CONAN_INFO_COMPILER_VERSION} PARENT_SCOPE) endif() endfunction() function(check_compiler_version) conan_split_version(${CMAKE_CXX_COMPILER_VERSION} VERSI...
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}") ...
::基于 Windows Visual Studio2015的 cpp_redis 编译脚本::可选参数:::/T-编译单元测试::/E-编译例子程序::/S-编译动态库,默认编译静态库::/MD-指定/MD编译选项,默认使用/MT@ECHOOFFSETLOCALECHOmake paho mqttVS2015projectIFNOTDEFINEDVS140COMNTOOLS(ECHOvs2015NOTFOUND.EXIT/B-1)ECHOvs2015 found.WHEREc...