将GCC安装在/usr/local/gcc-4.5.1目录下，支持C/C++和JAVA语言，其它选项参见GCC提供的帮助说明。 1）出现配置错误提示: checking build system type... x86_64-unknown-linux-gnu checking host system type... x86_64-unknown-linux-gnu checking target system type... x86_64-unknown-linux-gnu checking for a BSD-compatible install... /usr/bin/install -c checking whether ln works... yes checking whether ln -s works... yes checking for a sed that does not truncate output... /bin/sed checking for gawk... gawk checking for gcc... gcc checking for C compiler default output file name... a.out checking whether the C compiler works... yes checking whether we are cross compiling... no checking for suffix of executables... checking for suffix of object files... o checking whether we are using the GNU C compiler... yes checking whether gcc accepts -g... yes checking for gcc option to accept ISO C89... none needed checking for g++... g++ checking whether we are using the GNU C++ compiler... yes checking whether g++ accepts -g... yes checking for gnatbind... no checking for gnatmake... no checking whether compiler driver understands Ada... no checking how to compare bootstrapped objects... cmp --ignore-initial=16 $$f1 $$f2 checking for objdir... .libs checking for the correct version of gmp.h... no configure: error: Building GCC requires GMP 4.2+, MPFR 2.3.1+ and MPC 0.8.0+. Try the --with-gmp, --with-mpfr and/or --with-mpc options to specify their locations. Source code for these libraries can be found at their respective hosting sites as well as at ftp://gcc.gnu.org/pub/gcc/infrastructure/. See also http://gcc.gnu.org/install/prerequisites.html for additional info. If you obtained GMP, MPFR and/or MPC from a vendor distribution package, make sure that you have installed both the libraries and the header files. They may be located in separate packages.
2）解决办法： http://www.multiprecision.org/mpc 下载 $ wget ftp://ftp.gnu.org/gnu/mpc/mpc-1.0.2.tar.gz $ wget ftp://ftp.gnu.org/gnu/gmp/gmp-5.0.1.tar.bz2 下载gmp-5.0.1.tar.bz2 http://ftp.gnu.org/gnu/mpfr/ $wget http://ftp.gnu.org/gnu/mpfr/mpfr-3.1.2.tar.gz 下载mpfr-3.1.2.tar.gz。 先开始安装GMP。 解压GMP的压缩包后，得到源代码目录gmp-5.0.1。 在该目录的同级目录下建立一个临时的编译目录，这里命名为temp。 $ tar -jxvf gmp-5.0.1.tar.bz2 $ cd gmp-5.0.1 $ mkdir temp $ cd temp 然后开始配置安装选项，进入temp目录，输入以下命令进行配置： $ ../configure --prefix=/usr/local/gmp-5.0.1 $ make $ make install mpfr和mpc的安装方法与gmp类似。 不过要注意配置的时候要把gmp与mpfr的依赖关系选项加进去， 具体命令如下：
再安装mpfr $ tar -zxvf mpfr-3.1.2.tar.gz $ cd mpfr-3.1.2 $ mkdir temp $ cd temp $ ../configure --prefix=/usr/local/mpfr-3.1.0 --with-gmp=/usr/local/gmp-5.0.1 $ make $ make install
最后安装mpc $ tar -zxvf mpc-1.0.2.tar.gz $ cd mpc-1.0.2 $ mkdir temp $ cd temp $ ../configure --prefix=/usr/local/mpc-1.0.2 --with-gmp=/usr/local/gmp-5.0.1 --with-mpfr=/usr/local/mpfr-3.1.0 $ make $ make install 安装好这三个库之后，就可以正式开始安装gcc了。 当然了链接的时候，需要刚刚编译的3个lib。
$ vim /etc/profile 在最后一行加入: export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/mpc-1.0.2/lib:/usr/local/gmp-5.0.1/lib:/usr/local/mpfr-3.1.0/lib 保存并退出 $ source /etc/profile 然后是典型的configure，make，install三步曲。 $ ./configure --prefix=/usr/local/gcc-4.5.1 --enable-threads=posix --disable-checking --disable-multilib --enable-languages=c,c++ --with-gmp=/usr/local/gmp-5.0.1 --with-mpfr=/usr/local/mpfr-3.1.0 --with-mpc=/usr/local/mpc-1.0.2 $ make $ make check（可选） $ sudo make install
