在configure时报错如下：
……
checking for the correct version of gmp.h… yes
checking for the correct version of mpfr.h… yes
checking for the correct version of mpc.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.
照着网上的解决办法，安装了gmp，mpfr，mpc后仍然报错，不过这次只是缺少一个mpc.h，很奇怪，为什么只有这个头文件没有安装成功呢？
输入sudo yum install mpc，会提示已经安装好了最新版mpc-0.22-4.fc19.i686。捜噶，可能是因为fedora19里的最新版还是太旧了。于是到ftp://ftp.gnu.org/gnu/mpc/下载了真正最新版，并且安装成功后，问题完美解决！
