trouble building gcc-5.3.0

[Britton Kerin]

A very vanilla build (just --prefix used and plain 'make' form
gcc_objdir as I believe the build instruction are saying to do)
ultimately fails like this:

config.status: linking ../../../gcc-5.3.0/libgcc/gthr-posix.h to gthr-default.h
config.status: executing default commands
/home/bkerin/tmp/gcc_objdir/./gcc/xgcc
-B/home/bkerin/tmp/gcc_objdir/./gcc/
-B/home/bkerin/opt/gcc-5.3.0/i686-pc-linux-gnu/bin/
-B/home/bkerin/opt/gcc-5.3.0/i686-pc-linux-gnu/lib/ -isystem
/home/bkerin/opt/gcc-5.3.0/i686-pc-linux-gnu/include -isystem
/home/bkerin/opt/gcc-5.3.0/i686-pc-linux-gnu/sys-include    -g -O2 -O2
 -g -O2 -DIN_GCC    -W -Wall -Wno-narrowing -Wwrite-strings
-Wcast-qual -Wno-format -Wstrict-prototypes -Wmissing-prototypes
-Wold-style-definition  -isystem ./include   -fpic -mlong-double-80 -g
-DIN_LIBGCC2 -fbuilding-libgcc -fno-stack-protector   -fpic
-mlong-double-80 -I. -I. -I../.././gcc -I../../../gcc-5.3.0/libgcc
-I../../../gcc-5.3.0/libgcc/. -I../../../gcc-5.3.0/libgcc/../gcc
-I../../../gcc-5.3.0/libgcc/../include
-I../../../gcc-5.3.0/libgcc/config/libbid -DENABLE_DECIMAL_BID_FORMAT
-DHAVE_CC_TLS  -DUSE_TLS -o morestack.o -MT morestack.o -MD -MP -MF
morestack.dep -c -xassembler-with-cpp -include .vis
../../../gcc-5.3.0/libgcc/config/i386/morestack.S
cc1: fatal error: .vis: No such file or directory
compilation terminated.
make[3]: *** [morestack.o] Error 1
make[3]: Leaving directory
`/home/bkerin/tmp/gcc_objdir/i686-pc-linux-gnu/libgcc'

Anyone clues appreciated.

Britton