redhat6.2 clang编译环境搭建(采用源码包编译安装)
1. About clang++
office site：http://clang.llvm.org/
A major focus of our work on clang is to make it fast, light and scalable. The library-based architecture of clang makes it straight-forward to time and profile the cost of each layer of the stack, and the driver has a number of options for performance analysis. Many detailed benchmarks can be found online.
2. System environment configuration
Getting Introduction from the office website：
Compiling LLVM requires that you have several software packages installed. The table below lists those required packages. The Package column is the usual name for the software package that LLVM depends on. The Version column provides “known to work” versions of the package. The Notes column describes how LLVM uses the package and provides other details.
| Package | Version | Notes |
|---|---|---|
| GNU Make | 3.79, 3.79.1 | Makefile/build processor |
| GCC | >=4.7.0 | C/C++ compiler1 |
| python | >=2.5 | Automated test suite2 |
| GNU M4 | 1.4 | Macro processor for configuration3 |
| GNU Autoconf | 2.60 | Configuration script builder3 |
| GNU Automake | 1.9.6 | aclocal macro generator3 |
| libtool | 1.5.22 | Shared library manager3 |
| zlib | >=1.2.3.4 | Compression library4 |
local System configuration analysis ：
# /usr/bin/gcc4.4.5 --version gcc4.4.5 (GCC) 4.4.5 20110214 (Red Hat 4.4.5-6) # python -V Python 2.6.6 # make -v GNU Make 3.81 # automake --version automake (GNU automake) 1.11.1 # libtool --version ltmain.sh (GNU libtool) 2.2.6b Written by Gordon Matzigkeit <gord@gnu.ai.mit.edu>, 1996
3. gcc upgrade
3.1 gmp,mpfr,mpc installation
wget https://ftp.gnu.org/gnu/gmp/gmp-5.1.3.tar.bz2 wget http://www.mpfr.org/mpfr-current/mpfr-3.1.2.tar.gz wget ftp://ftp.gnu.org/gnu/mpc/mpc-1.0.2.tar.gz tar jxvf gmp-5.1.3.tar.bz2 tar zxvf mpfr-3.1.2.tar.gz tar zxvf mpc-1.0.2.tar.gz cd gmp-5.1.3 ./configure --enable-cxx CPPFLAGS=-fexceptions make; make install cd ../mpfr-3.1.2; ./configure make; make install cd ../mpc-1.0.2; ./configure make; make install
3.2 gcc upgrade
wget ftp://ftp.gnu.org/gnu/gcc/gcc-4.8.2/gcc-4.8.2.tar.bz2 tar -xvjf gcc-4.8.2.tar.bz2 cd gcc-4.8.2mkdir gcc-4.8.2-build cd gcc-4.8.2-build ../configure --prefix=/usr/local/gcc-4.8.2 --enable-languages=c,c++ make make install
notice：change the links in /usr/lib & /usr/bin [only need make some softlinks to the directory, incase of pollute the original files . You can remove the softlinks while necessary which is not commentary ]
cd /usr/bin/ # mv gcc gcc4.4.5 # mv g++ g++4.4.5 ln -sf /usr/local/gcc-4.8.2/bin/gcc gcc ln -sf /usr/local/gcc-4.8.2/bin/g++ g++ ln -sf /usr/local/gcc-4.8.2/lib64/libstdc++.so.6.0.18 /usr/lib64/libstdc++.so.6
4. make building files
Change directory to where you want the llvm directory placed. svn co http://llvm.org/svn/llvm-project/llvm/trunk llvm 4.2 Checkout Clang: cd llvm/tools svn co http://llvm.org/svn/llvm-project/cfe/trunk clang cd ../.. 4.3 Checkout extra Clang Tools: (optional) cd llvm/tools/clang/tools svn co http://llvm.org/svn/llvm-project/clang-tools-extra/trunk extra cd ../../../.. 4.4 Checkout Compiler-RT: cd llvm/projects svn co http://llvm.org/svn/llvm-project/compiler-rt/trunk compiler-rt cd ../.. 4.5 Build LLVM and Clang: mkdir build (for building without polluting the source dir) cd build ../configure --prefix=/usr/local/clang --enable-optimized make
4.6 error resolved
checking for x86_64-unknown-linux-gnu-gcc... /data/installs/gcc-4.7.4/host-x86_64-unknown-linux-gnu/gcc/xgcc -B/data/installs/gcc-4.7.4/host-x86_64-unknown-linux-gnu/gcc/ -B/usr/local/gcc-4.7.4/x86_64-unknown-linux-gnu/bin/ -B/usr/local/gcc-4.7.4/x86_64-unknown-linux-gnu/lib/ -isystem /usr/local/gcc-4.7.4/x86_64-unknown-linux-gnu/include -isystem /usr/local/gcc-4.7.4/x86_64-unknown-linux-gnu/sys-include checking for suffix of object files... configure: error: in `/data/installs/gcc-4.7.4/x86_64-unknown-linux-gnu/libgcc': configure: error: cannot compute suffix of object files: cannot compile See `config.log' for more details. make[2]: *** [configure-stage1-target-libgcc] Error 1 make[2]: Leaving directory `/data/installs/gcc-4.7.4' make[1]: *** [stage1-bubble] Error 2 make[1]: Leaving directory `/data/installs/gcc-4.7.4' make: *** [all] Error 2
resolution: due to the official document, the gcc-4.7.4 can not work normally with the clang++ , which been improved to be a bug
resolution:
5. clang environment test
root@192.168.100.252:/data/forilen# cat t.c #include <stdio.h> int main(int argc, char **argv) { printf("hello world\n"); } root@192.168.100.252:/data/forilen# clang t.c root@192.168.100.252:/data/forilen# ls a.out for.sh gerritDir git scripts t.c root@192.168.100.252:/data/forilen# ./a.out hello world
6. References
[1]. gcc upgrade: http://my.oschina.net/vaero/blog/210485
[2]. gcc download： http://gcc.parentingamerica.com/releases/ https://gcc.gnu.org/mirrors.html
[3]. clang installation: http://clang.llvm.org/get_started.html#build
[4]. python Introduction: http://blog.csdn.net/pan_tian/article/details/7684409
