在ubuntu14.04环境下编译gcc

chinaab

• 　　到GNU开源网址下载gcc源码,并查看编译教程
  
  　　GNU/GCC网址:http://www.gnu.org/software/gcc/
  

　　2.根据官网教程,编译gcc的所需环境依赖m4,gmp,mfpr,mpc

• 　　GNU Multiple Precision Library (GMP) version 4.3.2 (or later)
  
• 　　Necessary to build GCC.  If a GMP source distribution is found in asubdirectory of your GCC sources named gmp, it will be builttogether with GCC.  Alternatively, if GMP is already installed but itis not in your library search path, you will have to configure with the--with-gmp configure option.  See also --with-gmp-liband --with-gmp-include.     
  
  
• 　　MPFR Library version 2.4.2 (or later)
  
• 　　Necessary to build GCC.  It can be downloaded fromhttp://www.mpfr.org/.  If an MPFR source distribution is foundin a subdirectory of your GCC sources named mpfr, it will bebuilt together with GCC.  Alternatively, if MPFR is already installedbut it is not in your default library search path, the--with-mpfr configure option should be used.  See also--with-mpfr-lib and --with-mpfr-include.     
  
  
• 　　MPC Library version 0.8.1 (or later)
  
• 　　Necessary to build GCC.  It can be downloaded fromhttp://www.multiprecision.org/.  If an MPC source distributionis found in a subdirectory of your GCC sources named mpc, itwill be built together with GCC.  Alternatively, if MPC is alreadyinstalled but it is not in your default library search path, the--with-mpc configure option should be used.  See also--with-mpc-lib and --with-mpc-include.
  

　　--------来自https://gcc.gnu.org/install/prerequisites.html

　　3.以上一个依赖包,也是GNU项目,可从GNU网站找到
　　http://www.gnu.org/software/m4/
　　http://www.gnu.org/software/gmp/
　　http://www.gnu.org/software/mpfr/
　　http://www.gnu.org/software/mpc/
　　4.按顺序依次
　　解压
　　tar xjf XXX.tar.bz2
　　./configure
　　make
　　sudo make install
　　5.编译gcc
　　解压gcc源码
　　创建gcc-build
　　../gcc-5.3.0/configure
　　设置环境变量     export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/lib
　　make
　　sudo make install
　　6.成功
　　/usr/local/bin/gcc -v

　　7.遇到问题:
　　问题1:  cannot compute suffix of object files: cannot compile
　　配置环境变量,或者路径不对
　　解决: export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/lib