编译安装gcc

准备好源码这些就不说了

gcc-4.5.0.tar.gz

下面是一些会用到的

gmp-4.3.2.tar.bz2

mpfr-3.0.0.tar.gz

mpc-0.8.2.tar.gz

上面3个都采取默认方式安装 都装到下面了

lib=>/usr/local/lib

include=>/usr/local/include

gcc安装

建立一个编译用的目录我用的是

tt:~/src/gcc-4.5.0/build

下面是配置

../configure --prefix=/usr/local/gcc-4.5.0/ --enable-languages=c,c++,java --with-gmp-include=/usr/local/include --with-gmp-lib=/usr/local/lib --with-mpfr-include=/usr/local/include --with-mpfr-lib=/usr/local/lib --with-mpc-include=/usr/local/include --with-mpc-lib=/usr/local/lib --enable-threads=posix

make遇到下面错误让看config.log里面有详细内容 注意:config.log可能在build下其他目录，信息不一样，不明白就把所有的都看了 我看的是tt:~/src/gcc-4.5.0/build # vi i686-pc-linux-gnu/libgcc/config.log

error: cannot compute suffix of object files: cannot compile

看config.log后发现

error while loading shared libraries: libmpc.so.2: cannot open shared object file

这时候需要下面这样做

tt:~/src/gcc-4.5.0/build # cat ~/.profile 

export LD_LIBRARY_PATH=/usr/local/lib

目前还在漫长的make中 一会make install

因为我是两个版本并存 所以

需要做符号链接 大家懂的

下面是老版本，默认gcc安装好链接到4.5.0

tt:~/src/gcc-4.5.0/build # ll /usr/bin/gcc* /usr/bin/g++*

lrwxrwxrwx 1 root root      9 Sep  2 09:45 /usr/bin/g++ -> g++-4.1.2

-rwxr-xr-x 1 root root 123836 May  3  2007 /usr/bin/g++-4.1.2

lrwxrwxrwx 1 root root      9 Sep  2 09:45 /usr/bin/gcc -> gcc-4.1.2

-rwxr-xr-x 1 root root 123484 May  3  2007 /usr/bin/gcc-4.1.2

ok!

番外篇：

在我查看config.log的时候发现有一个ppl提示找不到

ppl-0.11.2.tar.bz2

下载后./configure提示找不到gmp如下 

checking how to link with libgmpxx... -lgmpxx /usr/local/lib/libgmp.so -Wl,-rpath -Wl,/usr/local/lib

checking for the GMP library version 4.1.3 or above... no

configure: error: Cannot find GMP version 4.1.3 or higher.

GMP is the GNU Multi-Precision library:

see for more information.

When compiling the GMP library, do not forget to enable the C++ interface:

add --enable-cxx to the configuration options.

指定gmp路径也出这个

  --with-gmp-build=DIR    use a non-installed build of GMP in DIR

  --with-gmp-prefix[=DIR]  search for libgmp, libgmpxx in DIR/include and DIR/lib

  --without-gmp-prefix     don't search for libgmp, libgmpxx in includedir and libdir

  --with-mlgmp=DIR        use the ML GMP package installed in DIR

我搞了半天没装上

由于时间关系ppl我这边就不装了

求路过高手指点迷津 小弟在此谢过了