View Compilation Error

In file included from 22519_0_7571.cpp:5:
GCC/bin/../lib/gcc/mingw32/3.4.2/../../../../include/unistd.h:11:21: process.h: No such file or directory
22519_0_7571.cpp: In function `int main()':
22519_0_7571.cpp:13: error: `fork' undeclared (first use this function)
22519_0_7571.cpp:13: error: (Each undeclared identifier is reported only once for each function it appears in.)
ion t