參考資訊：
https://ftp.gnu.org/gnu/gcc/gcc-12.1.0/
$ cd $ wget https://ftp.gnu.org/gnu/gcc/gcc-12.1.0/gcc-12.1.0.tar.gz $ tar xvf gcc-12.1.0.tar.gz $ cd gcc-12.1.0 $ ./configure --with-gnu-as --with-gnu-ld --disable-libmudflap --enable-lto --enable-objc-gc --enable-shared --without-included-gettext --enable-nls --disable-sjlj-exceptions --enable-gnu-unique-object --enable-linker-build-id --disable-libstdcxx-pch --enable-c99 --enable-clocale=gnu --enable-libstdcxx-debug --enable-long-long --with-cloog=no --with-ppl=no --with-isl=no --disable-multilib --with-float=hard --with-mode=thumb --with-tune=cortex-a9 --with-arch=armv7-a --with-fpu=vfpv3-d16 --enable-threads=posix --enable-multiarch --enable-libstdcxx-time=yes --enable-checking=release --disable-bootstrap --enable-languages=c,c++,fortran,lto,ada $ make -j4 $ sudo make install