handle the AT_FDCWD usages

Author: Job Hernandez

libc/src/fcntl/linux/CMakeLists.txt

@@ -29,6 +29,7 @@ add_entrypoint_object(
     ../open.h
   DEPENDS
     libc.hdr.types.mode_t
+    libc.hdr.fcntl_macros
     libc.src.__support.OSUtil.osutil
     libc.src.errno.errno
 )

libc/src/fcntl/linux/open.cpp

@@ -14,6 +14,7 @@
 #include "src/errno/libc_errno.h"
 
 #include "hdr/types/mode_t.h"
+#include "hdr/fcntl_macros.h"
 #include <stdarg.h>
 #include <sys/syscall.h> // For syscall numbers.
 

libc/src/spawn/linux/CMakeLists.txt

@@ -6,6 +6,7 @@ add_entrypoint_object(
     ../posix_spawn.h
   DEPENDS
     libc.hdr.types.mode_t
+    libc.hdr.fcntl_macros
     libc.include.spawn
     libc.include.sys_syscall
     libc.include.signal

libc/src/spawn/linux/posix_spawn.cpp

@@ -15,6 +15,7 @@
 #include "src/spawn/file_actions.h"
 
 #include "hdr/types/mode_t.h"
+#include "hdr/fcntl_macros.h"
 #include <signal.h> // For SIGCHLD
 #include <spawn.h>
 #include <sys/syscall.h> // For syscall numbers.