Hi, I am facing problem while building cross compiler gcc-4.0.3 for ARM using CYGWIN in Windows2000. I m using following : Binutils-2.16 Newlib1.14.0 Gcc-4.0.3 When i build Bootstrap Cross Compiler , i get following error message: make[3]: Entering directory `/cygdrive/c/build/build-gcc/gcc' /cygdrive/c/build/build-gcc/gcc/xgcc -B/cygdrive/c/build/build-gcc/gcc/ -B/cygdrive/c/build/Build/arm-elf/bin/ -B/cygdrive/c/build/Build/arm-elf/lib/ -isystem /cygdrive/c/build/Build/arm-elf/include -isystem /cygdrive/c/build/Build/arm-elf/sys-include -O2 -DIN_GCC -DCROSS_COMPILE -W -Wall -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition -isystem ./include -I. -I. -I.././gcc-4.0.3/gcc -I.././gcc-4.0.3/gcc/. -I.././gcc-4.0.3/gcc/../include -I.././gcc-4.0.3/gcc/../libcpp/include -g0 -finhibit-size-directive -fno-inline-functions -fno-exceptions -fno-zero-initialized-in-bss -fno-unit-at-a-time \ -c .././gcc-4.0.3/gcc/crtstuff.c -DCRT_BEGIN \ -o crtbegin.o In file included from .././gcc-4.0.3/gcc/crtstuff.c:64: .././gcc-4.0.3/gcc/tsystem.h:90:19: error: stdio.h: No such file or directory .././gcc-4.0.3/gcc/tsystem.h:93:23: error: sys/types.h: No such file or directory .././gcc-4.0.3/gcc/tsystem.h:96:19: error: errno.h: No such file or directory .././gcc-4.0.3/gcc/tsystem.h:103:20: error: string.h: No such file or directory .././gcc-4.0.3/gcc/tsystem.h:104:20: error: stdlib.h: No such file or directory .././gcc-4.0.3/gcc/tsystem.h:105:20: error: unistd.h: No such file or directory .././gcc-4.0.3/gcc/tsystem.h:111:18: error: time.h: No such file or directory make[3]: *** [crtbegin.o] Error 1 make[3]: Leaving directory `/cygdrive/c/build/build-gcc/gcc' make[2]: *** [extra] Error 2 make[2]: Leaving directory `/cygdrive/c/build/build-gcc/gcc' make[1]: *** [stmp-multilib] Error 2 make[1]: Leaving directory `/cygdrive/c/build/build-gcc/gcc' make: *** [all-gcc] Error 2 My config options is as below: $ ./gcc4.0.3/configure --target=$TARGET --prefix=$PREFIX --disable-threads --wi th-newlib -with-headers=../newlib-1.14.0/newlib/libc/include --disable-shared - -enable-languages=c --with-cpu=arm7tdmi 2>&1 |tee configure.log Can anyone please help me point out the problem cause & how to solve it? Thanks and Regards, Kanwal