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3.2 build failure: i386-pc-linux-gnu cross compiler hosted on i686-pc-cygwin

/home/unknown/gcc-3.2/gcc/xgcc -B/home/unknown/gcc-3.2/gcc/
-B/usr/local/i386-pc-linux-gnu/i386-pc-linux-gnu/lib/ -isystem
/usr/local/i386-pc-linux-gnu/i386-pc-linux-gnu/include -O2  -DIN_GCC
-DCROSS_COMPILE   -W -Wall -Wwrite-strings -Wstrict-prototypes
-Wmissing-prototypes -isystem ./include  -fPIC -g -DHAVE_GTHR_DEFAULT
-DIN_LIBGCC2 -D__GCC_FLOAT_NOT_NEEDED -Dinhibit_libc -I. -I. -I. -I./.
-I./config -I./../include  -DL_muldi3 -c ./libgcc2.c -o
In file included from tconfig.h:22,
                 from libgcc2.c:36:
config/i386/linux.h:224:20: signal.h: No such file or directory
config/i386/linux.h:225:26: sys/ucontext.h: No such file or directory
make[2]: *** [libgcc/./_muldi3.o] Error 1
make[2]: Leaving directory `/home/unknown/gcc-3.2/gcc'
make[1]: *** [libgcc.a] Error 2
make[1]: Leaving directory `/home/unknown/gcc-3.2/gcc'
make: *** [all-gcc] Error 2

gcc seems to want linux-specific headers to build a cross compiler
targeted at linux. Is this correct behavior?

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