GCC编译

yum install gcc gcc-c++ glibc-static
yum install -y gcc texinfo-tex flex zip libgcc.i686 glibc-devel.i686

http://ftp.gnu.org/gnu/gcc
wget https://ftp.gnu.org/gnu/gcc/gcc-7.1.0/gcc-7.1.0.tar.gz
tar -xvf gcc-7.1.0.tar.gz
cd gcc-7.1.0
./contrib/download_prerequisites

mkdir build
cp  mpfr-3.1.4.tar.bz2 build
cp  mpc-1.0.3.tar.gz build
cp  gmp-6.1.0.tar.bz2 build
cp  isl-0.16.1.tar.bz2 build

../configure --enable-checking=release --enable-languages=c,c++ --disable-multilib
make
make install

#删掉原来版本的gcc快捷方式
rm -rf /usr/bin/gcc
rm -rf /usr/bin/g++
rm -rf /usr/lib64/libstdc++.so.6 

#创建新的gcc快捷方式
ln -s /usr/local/bin/gcc /usr/bin/gcc
ln -s /usr/local/bin/g++ /usr/bin/g++
ln -s /usr/local/lib64/libstdc++.so.6 /usr/lib64/libstdc++.so.6 

--build=x86_64-w64-mingw32 --host=x86_64-w64-mingw32 --target=x86_64-w64-mingw32 --enable-bootstrap --with-arch=x86-64 --with-tune=generic --enable-languages=c,lto,c++,fortran,ada,objc,obj-c++ --enable-shared --enable-static --enable-libatomic --enable-threads=posix --enable-graphite --enable-fully-dynamic-string --enable-libstdcxx-filesystem-ts=yes --enable-libstdcxx-time=yes --disable-libstdcxx-pch --disable-libstdcxx-debug --disable-isl-version-check --enable-lto --enable-libgomp --enable-multilib --enable-checking=release --disable-rpath --disable-win32-registry --disable-nls --disable-werror --disable-symvers --enable-plugin --with-libiconv --with-system-zlib -with-gnu-as --with-gnu-ld