CMake "clang++ is not able compile a simple test program" (Fedora 20)

CMake "clang++ is not able compile a simple test program" (Fedora 20)

本文关键字：program test simple Fedora is clang++ not able compile CMake      更新时间：2023-10-16

所以我尝试安装clang+cmake来编译一个简单的C++程序，但我得到了以下错误：

-- The C compiler identification is GNU 4.8.3
-- The CXX compiler identification is Clang 3.5.0
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working CXX compiler: /usr/local/bin/clang++
-- Check for working CXX compiler: /usr/local/bin/clang++ -- broken
CMake Error at /usr/share/cmake/Modules/CMakeTestCXXCompiler.cmake:54 (message):
  The C++ compiler "/usr/local/bin/clang++" is not able to compile a simple
  test program.
  It fails with the following output:
   Change Dir: /home/jtcwang/tmp/CMake/CMake/CMakeFiles/CMakeTmp

  Run Build Command:/usr/bin/gmake "cmTryCompileExec697180971/fast"
  /usr/bin/gmake -f CMakeFiles/cmTryCompileExec697180971.dir/build.make
  CMakeFiles/cmTryCompileExec697180971.dir/build
  gmake[1]: Entering directory
  `/home/jtcwang/tmp/CMake/CMake/CMakeFiles/CMakeTmp'
  /usr/bin/cmake -E cmake_progress_report
  /home/jtcwang/tmp/CMake/CMake/CMakeFiles/CMakeTmp/CMakeFiles 1
  Building CXX object
  CMakeFiles/cmTryCompileExec697180971.dir/testCXXCompiler.cxx.o
  /usr/local/bin/clang++ -o
  CMakeFiles/cmTryCompileExec697180971.dir/testCXXCompiler.cxx.o -c
  /home/jtcwang/tmp/CMake/CMake/CMakeFiles/CMakeTmp/testCXXCompiler.cxx
  Linking CXX executable cmTryCompileExec697180971
  /usr/bin/cmake -E cmake_link_script
  CMakeFiles/cmTryCompileExec697180971.dir/link.txt --verbose=1
  /usr/local/bin/clang++
  CMakeFiles/cmTryCompileExec697180971.dir/testCXXCompiler.cxx.o -o
  cmTryCompileExec697180971 -rdynamic
  /usr/bin/ld: cannot find -lstdc++
  clang: error: linker command failed with exit code 1 (use -v to see
  invocation)
  gmake[1]: Leaving directory
  `/home/jtcwang/tmp/CMake/CMake/CMakeFiles/CMakeTmp'
  gmake[1]: *** [cmTryCompileExec697180971] Error 1
  gmake: *** [cmTryCompileExec697180971/fast] Error 2

它甚至没有编译我的程序，因为它无法编译测试程序。

看起来重要的一行在这里：

 /usr/bin/ld: cannot find -lstdc++

然而，我已经检查了libstdc++是否已安装并且是最新的，所以在这一点上我很困惑。

我尝试过的其他东西：

  1. 使用预构建的二进制文件而不是sudo yum install clang
  2. 卸下并重新安装
  3. 尝试了clang++ hello.cpp（hello world程序）。它说没有找到<iostreams>。clang缺少标准库吗？编辑：更改为<iostream>会出现与上面相同的链接器错误

一般来说，我不熟悉clang、cmake和C++场景，所以如果有任何提示，我将不胜感激。谢谢

您需要C++库的开发库和头文件，请尝试

yum install libstdc++-devel

您的/home/gnu/bin/c++似乎需要额外的标志来正确链接，而CMake对此一无所知。

要使用/usr/bin/c++作为编译器，请使用-DCMAKE_CXX_compiler=/usr/bin/cC++运行cmake。

此外，CMAKE_PREFIX_PATH变量设置了应该安装项目文件的目标目录。它与CMake安装前缀无关，而且CMake本身已经知道这一点。

相关文章：