check_symbol_exists / check_cxx_symbol_exists 尝试编译一段 C / C++ 代码来确认库中的符号是否存在。此函数一般用于检测系统默认库。其原型为: check_symbol_exists(<symbol> <files> <variable>) # needs "include(CheckSymbolExists)" check_cxx_symbol_exists(<symbol> <files> <variable>) # needs "...
collect2: error: ld returned 1 exit status 问题参考:https://stackoverflow.com/questions/55445914/cmake-check-symbol-exists-doesnt-work-because-of-missing-pthread 解决:https://cmake.org/cmake/help/latest/module/CheckSymbolExists.html 在CMakeLists文件里加一行 include(CheckSymbolExists) --- 解决!!
我们首先通过在顶级CMakeLists.txt中使用CheckSymbolExists.cmake宏检测这些函数的可用性,如下: # does this system provide the log and exp functions? include(CheckSymbolExists) set(CMAKE_REQUIRED_LIBRARIES "m") check_symbol_exists(log "math.h" HAVE_LOG) check_symbol_exists(exp "math.h" HAVE_EXP...
https://cmake.org/cmake/help/latest/guide/tutorial/Adding%20a%20Custom%20Command%20and%20Generated%20File.html 本文主要演示使用CMake CheckSymbolExists函数探查系统是否存在相应的函数,如果不存在,就使用CMake自带的数学库。并定义编译选项,让程序根据编译选项,执行对应分支。 程序结构如下, image.png tutori...
CheckOBJCSourceRuns.cmake CheckOBJCXXCompilerFlag.cmake CheckOBJCXXSourceCompiles.cmake CheckOBJCXXSourceRuns.cmake CheckPIESupported.cmake CheckPrototypeDefinition.c.in CheckPrototypeDefinition.cmake CheckSizeOf.cmake CheckStructHasMember.cmake CheckSymbolExists.cmake CheckTypeSize.c.in C...
check_symbol_exists(exp "math.h" HAVE_EXP) if(HAVE_LOG AND HAVE_EXP) target_link_libraries(Child PRIVATE m) endif() endif() 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 如果可用,则使用下面的命令指定HAVE_LOG和HAVE_EXP作为PRIVATE编译定义。
Unknown CMake command "check_symbol_exists". -- Configuring incomplete, errors occurred! See also "/Depot/jjjj/libconfig/CMakeFiles/CMakeOutput.log". My host system is linux; g++ version and gcc version is 8.2.0; my cmake version is cmake version 3.13.3. No clue where the error is ...
Unknown CMake command "CHECK_CXX_SYMBOL_EXISTS". -- Configuring incomplete, errors occurred! 报错原因: cmake的版本太低 --查看cmake的版本 [root@localhost mariadb-10.1.14]# cmake --version cmake version 2.8.2 解决方法: 安装新版本的cmake工具——cmake-3.5.2 ...
我们首先使用顶级CMakeLists.txt中的CheckSymbolExists模块测试这些函数的可用性。我们将在TutorialConfig.h.in中使用新定义,因此请确保在配置该文件之前进行设置。 include(CheckSymbolExists) set(CMAKE_REQUIRED_LIBRARIES "m") check_symbol_exists(log "math.h" HAVE_LOG) check_symbol_exists(exp "math.h" ...
check_symbol_exists(exp"math.h"HAVE_EXP)if(HAVE_LOGANDHAVE_EXP)target_compile_definitions(MathFunctions PRIVATE"HAVE_LOG""HAVE_EXP")endif() 完成这些更新之后,重新构建项目。运行构建的Tutorial可执行文件,并验证结果是否与本步骤前面的结果相同。