Hi,
Here's a report of a successful build and install of GCC:
$ gcc-6.2.0/config.guess
sparc64-unknown-linux-gnu
$ newcompiler/bin/gcc -v
Using built-in specs.
COLLECT_GCC=newcompiler/bin/gcc
COLLECT_LTO_WRAPPER=/home/aaro/gcctest/newcompiler/libexec/gcc/sparc-unknown-linux-gnu/6.2.0/lto-wrapper
Target: sparc-unknown-linux-gnu
Configured with: ../gcc-6.2.0/configure --with-cpu=ultrasparc
--enable-targets=all --disable-libsanitizer --disable-nls
--prefix=/home/aaro/gcctest/newcompiler --enable-languages=c,c++
--host=sparc-unknown-linux-gnu --build=sparc-unknown-linux-gnu
--target=sparc-unknown-linux-gnu --with-system-zlib --with-sysroot=/
Thread model: posix
gcc version 6.2.0 (GCC)
-- Build environment --
host: sun-ultra-10
distro: los.git rootfs=d8b497 native=d8b497
kernel: Linux 4.8.0-rc6-ultra-los_d8b497
binutils: GNU binutils 2.27
make: GNU Make 4.1
libc: GNU C Library (GNU libc) stable release version 2.24
zlib: 1.2.8
mpfr: 3.1.3
gmp: 6
-- Time consumed --
configure: real0m 33.65s
user0m 22.02s
sys 0m 2.01s
bootstrap: real40h 3m 36s
user39h 3m 41s
sys 29m 25.86s
install:real3m 54.72s
user2m 7.74s
sys 0m 22.60s
-- Hardware details ---
MemTotal: 507912 kB
cpu : TI UltraSparc IIi (Sabre)
fpu : UltraSparc IIi integrated FPU
pmu : ultra12
prom: OBP 3.31.0 2001/07/25 20:36
type: sun4u
ncpus probed: 1
ncpus active: 1
D$ parity tl1 : 0
I$ parity tl1 : 0
Cpu0ClkTck : 1a39de00
cpucaps : flush,stbar,swap,muldiv,v9,mul32,div32,v8plus,vis
MMU Type: Spitfire
MMU PGSZs : 8K,64K,512K,4MB
A.