Building GCC (7.3.0) on Raspbian

Place untarred and latest isl, mpc, mpfr and gmp products in the gcc-X.Y.Z directory (without their version numbers) and the GCC build will include them automatically.

Get an extra 10G of swap from somewhere.

#!/bin/sh

exec ./configure			\
	-v				\
	--enable-languages=c,c++	\
	--prefix=/usr/local/gcc-7.3.0	\
	--with-arch=armv6		\
	--with-fpu=vfp			\
	--with-float=hard		\
	--build=arm-linux-gnueabihf	\
	--host=arm-linux-gnueabihf	\
	--target=arm-linux-gnueabihf
exit
make -j 2