Cent OS 7 Compile and install libc++ and Libc++abi

This article describes how to build the C++11 build environment in CentOS 7

Clang's Custom C + + library is libc++ (LIBCXX). then, Libcxx also needs an ABI library, Libc++abi (Libcxxabi). Unfortunately, the two libraries have a circular dependency problem. to break the cycle dependency problem, you can build libc++ without connecting to the Libc++abi. then, using this libc++, we can build Libc++abi link to libc++. Finally, using Libc++abi, we can build a new libc++ link to Libc++abi.

CMake and CLANG/LLVM installation please see

Http://www.cnblogs.com/BinBinStory/p/7461345.html

Http://www.cnblogs.com/BinBinStory/p/7499527.html

The Libc++,libc++abi build steps are as follows:

1. Get Libc++,libc++abi

• Libc++ source code (. Sig)
  
• Libc++abi source code (. Sig)

2. After the download, two are extracted, get two directories:

Libcxx-4.0.1.src

Libcxxabi-4.0.1.src

3. The first round of building libcxx does not require libcxxabi participation.

CD libcxx# It is not recommended to build Libcxxinchthe source root directory.# so, we Makea tmp directory.mkdirtmpcd tmp# specifying cmake_build_type to Release shall generate performance optimized code.# the Cmake_install_prefi X Changes theInstallPath from the default/usr/local to/Usr.cmake-dcmake_build_type=release-dcmake_install_prefix=/usr-dcmake_c_compiler=clang-dcmake_cxx_compiler=clang++ ..sudo  Make InstallCD..RMTMP-RFCD .

4. Build Libcxxabi libc++.

CD Libcxxabi mkdir  -dcmake_build_type=release-dcmake_install_prefix=/usr-dcmake_c_compiler=clang-dcmake_cxx_compiler= clang++-dlibcxxabi_libcxx_includes=. /.. /libcxx/include: sudo  Make Install CD.. /..

5. The 2nd round uses Libcxxabi to build Libcxx.

CD Libcxx mkdir  time, we want to compile libcxx with Libcxxabi, so we had to specifylibcxx_cxx_abi=-dcmake_bu ild_type=release-dcmake_install_prefix=/usr-dcmake_c_compiler=clang-dcmake_cxx_compiler=clang++-DLIBCXX_CXX_ Abi=libcxxabi-dlibcxx_cxx_abi_include_paths=. /.. /libcxxabi/include: sudo  Make Install

6. Write a C + + test program.

// t.cpp#include <iostream>usingnamespace  std; int Main () {  "Hello world! " << Endl;}

7. Test C + + compilation with clang++.

7 doesn't allow indirect library linking. clang++-std=c++ -stdlib=libc++-lc++abi T.cpp. /a.out

References:
[1] http://libcxx.llvm.org/
[2] http://libcxxabi.llvm.org/

Translated from: https://stackoverflow.com/questions/25840088/how-to-build-libcxx-and-libcxxabi-by-clang-on-centos-7

Cent OS 7 Compile and install libc++ and Libc++abi