Here's a report of a successful build and install of GCC:

$ gcc-6.2.0/config.guess

$ newcompiler/bin/gcc -v
Using built-in specs.
Target: mipsel-unknown-linux-gnu
Configured with: ../gcc-6.2.0/configure --with-arch=loongson2f --with-abi=32 
--with-fp-32=xx --enable-targets=all --disable-nls 
--prefix=/home/aaro/gcctest/newcompiler --enable-languages=c,c++ 
--host=mipsel-unknown-linux-gnu --build=mipsel-unknown-linux-gnu 
--target=mipsel-unknown-linux-gnu --with-system-zlib --with-sysroot=/
Thread model: posix
gcc version 6.2.0 (GCC) 

-- Build environment ----------------------------------------------------------

host:     fuloong-minipc
distro:   los.git rootfs=ff90d27 native=ff90d27
kernel:   Linux 4.8.0-rc6-lemote-los_ff90d27
binutils: GNU binutils 2.27
make:     GNU Make 4.1
libc:     GNU C Library (GNU libc) stable release version 2.24
mpfr:     3.1.3
gmp:      60000

-- Time consumed --------------------------------------------------------------

configure:      real    0m 29.66s
                user    0m 16.73s
                sys     0m 10.38s

bootstrap:      real    48h 52m 49s
                user    46h 16m 21s
                sys     2h 3m 24s

install:        real    9m 46.73s
                user    4m 13.22s
                sys     2m 30.07s

-- Hardware details -----------------------------------------------------------

MemTotal: 494080 kB

system type             : lemote-fuloong-2f-box
machine                 : Unknown
processor               : 0
cpu model               : ICT Loongson-2 V0.3  FPU V0.1
BogoMIPS                : 697150.20
wait instruction        : yes
microsecond timers      : yes
tlb_entries             : 64
extra interrupt vector  : no
hardware watchpoint     : yes, count: 0, address/irw mask: []
isa                     : mips2 mips3
ASEs implemented        :
shadow register sets    : 1
kscratch registers      : 0
package                 : 0
core                    : 0
VCED exceptions         : not available
VCEI exceptions         : not available


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