1. 从http://gcc.gnu.org/gcc-4.5上，得到gcc-4.5.2的原代码，可以从Mirror的网站下载成功gcc-4.5.2.tar.bz2,在本地解压。

2. 怎么确定--target的对象，目前确认的方法是GCC 4.5 Release Serie中的successful builds 中,可以看到i686-pc-linux-gnu，所以此处target=i686-pc-linux-gnu

3. ./configure --target=i686-pc-linux-gnu --prefix=/home/hebo/gcc

4. make

5. 可以看到错误提示：

configure: error: cannot compute suffix of object files: cannot compile
See `config.log' for more details.
make[1]: *** [configure-target-libgcc] 错误 1

6. 查持config.log错误：

configure:5841: checking for version 0.10 of PPL
configure:5858: gcc -c -g -O2    conftest.c >&5
conftest.c:10: fatal error: ppl_c.h: No such file or directory
compilation terminated.

 

configure:6475: checking libelf.h usability
configure:6475: gcc -c -g -O2 -I/usr/include/libelf  -I/usr/include/libelf conftest.c >&5
conftest.c:53: fatal error: libelf.h: No such file or directory
compilation terminated.

 

configure:6487: checking gelf.h usability
configure:6487: gcc -c -g -O2 -I/usr/include/libelf  -I/usr/include/libelf conftest.c >&5
conftest.c:53: fatal error: gelf.h: No such file or directory
compilation terminated.

 

7.安装ppl的库

sudo apt-get install libppl0.10-dev

sudo apt-get install libcloog-ppl-dev