Fix build failures in full build mode

Author: vinayakdsci

libc/include/llvm-libc-macros/linux/fcntl-macros.h

@@ -46,6 +46,10 @@
 #define O_RDWR 00000002
 #define O_WRONLY 00000001
 
+#define F_RDLCK 0
+#define F_WRLCK 1
+#define F_UNLCK 2
+
 // Special directory FD to indicate that the path argument to
 // openat is relative to the current directory.
 #define AT_FDCWD -100

libc/test/src/fcntl/CMakeLists.txt

@@ -29,6 +29,8 @@ add_libc_unittest(
     libc.src.fcntl.fcntl
     libc.src.fcntl.open
     libc.src.unistd.close
+    libc.hdr.types.struct_flock
+    libc.hdr.fcntl_macros
     libc.test.UnitTest.ErrnoSetterMatcher
 )
 

libc/test/src/fcntl/fcntl_test.cpp

@@ -6,13 +6,18 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "hdr/fcntl_macros.h"
+#include "hdr/types/struct_flock.h"
 #include "src/errno/libc_errno.h"
 #include "src/fcntl/fcntl.h"
 #include "src/fcntl/open.h"
 #include "src/unistd/close.h"
 #include "test/UnitTest/ErrnoSetterMatcher.h"
 #include "test/UnitTest/Test.h"
 
+#include <stdio.h>
+#include <sys/stat.h> // For S_IRWXU
+
 TEST(LlvmLibcFcntlTest, FcntlDupfd) {
   using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Succeeds;
   constexpr const char *TEST_FILE_NAME = "testdata/fcntl_dup.test";