Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86
Copyright (C) Microsoft Corp 1984-1998. All rights reserved.

cc_test.c
Microsoft (R) Incremental Linker Version 6.00.8447
Copyright (C) Microsoft Corp 1992-1998. All rights reserved.

/out:cc_test.exe 
/out:cc_test.exe 
cc_test.obj 
Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86
Copyright (C) Microsoft Corp 1984-1998. All rights reserved.

fcntl_test.c
fcntl_test.c(6) : error C2079: 'f' uses undefined struct 'flock'
fcntl_test.c(7) : error C2224: left of '.l_type' must have struct/union type
fcntl_test.c(7) : error C2065: 'F_RDLCK' : undeclared identifier
fcntl_test.c(8) : error C2224: left of '.l_whence' must have struct/union type
fcntl_test.c(9) : error C2224: left of '.l_start' must have struct/union type
fcntl_test.c(10) : error C2224: left of '.l_len' must have struct/union type
fcntl_test.c(11) : error C2065: 'F_SETLK' : undeclared identifier
Failed to compile a program that uses fcntl(). Does your system have a fcntl(2) system call?