Problems building current GCC snapshot on Cygwin

[Angelo Graziosi]

Usually I do weekly builds of GCC snapshots on Cygwin, but current 
snapshot (http://gcc.gnu.org/ml/gcc/2013-04/msg00091.html) fails with:

...
g++ -c  -DIN_GCC_FRONTEND -DIN_GCC_FRONTEND -g -DIN_GCC 
-fno-exceptions -fno-rtti -fasynchronous-unwind-tables -W -Wall 
-Wwrite-strings -Wcast-qual    -DHAVE_CONFIG_H -I. -Ic-family 
-I/home/pippo/gcc/gcc-4.9-20130407/gcc 
-I/home/pippo/gcc/gcc-4.9-20130407/gcc/c-family 
-I/home/pippo/gcc/gcc-4.9-20130407/gcc/../include 
-I/home/pippo/gcc/gcc-4.9-20130407/gcc/../libcpp/include 
-I/home/pippo/gcc/gcc-4.9-20130407/gcc/../libdecnumber 
-I/home/pippo/gcc/gcc-4.9-20130407/gcc/../libdecnumber/bid 
-I../libdecnumber -I/home/pippo/gcc/gcc-4.9-20130407/gcc/../libbacktrace 
     /home/pippo/gcc/gcc-4.9-20130407/gcc/c-family/c-dump.c -o 
c-family/c-dump.o
/home/pippo/gcc/gcc-4.9-20130407/gcc/c-family/c-cppbuiltin.c: In 
function ‘void c_cpp_builtins(cpp_reader*)’:
/home/pippo/gcc/gcc-4.9-20130407/gcc/c-family/c-cppbuiltin.c:914:3: 
error: ‘TARGET_CYGWIN64’ was not declared in this scope
...

I am building on an AMD Athlon 64 2C with XP 32 an Cygwin 1.7.17 (the 
official 32b distribution).


Ciao,
   Angelo.