define COMPILER_RT_UNUSED

Author: Wael Yehia

compiler-rt/lib/profile/InstrProfilingPort.h

@@ -23,6 +23,7 @@
 #define COMPILER_RT_FTRUNCATE(f,l) _chsize(_fileno(f),l)
 #define COMPILER_RT_ALWAYS_INLINE __forceinline
 #define COMPILER_RT_CLEANUP(x)
+#define COMPILER_RT_UNUSED
 #define COMPILER_RT_USED
 #elif __GNUC__
 #ifdef _WIN32
@@ -38,6 +39,7 @@
 #define COMPILER_RT_ALLOCA __builtin_alloca
 #define COMPILER_RT_ALWAYS_INLINE inline __attribute((always_inline))
 #define COMPILER_RT_CLEANUP(x) __attribute__((cleanup(x)))
+#define COMPILER_RT_UNUSED __attribute__((unused))
 #define COMPILER_RT_USED __attribute__((used))
 #endif
 

compiler-rt/lib/profile/InstrProfilingUtil.c

@@ -269,7 +269,7 @@ COMPILER_RT_VISIBILITY FILE *lprofOpenFileEx(const char *ProfileName) {
 
 // Return 1 (true) if the file descriptor Fd represents a file that is on a
 // local filesystem, otherwise return 0.
-static int is_local_filesystem(int Fd) {
+COMPILER_RT_UNUSED static int is_local_filesystem(int Fd) {
 #if defined(_AIX)
   struct statfs Vfs;
   if (fstatfs(Fd, &Vfs) != 0) {
@@ -317,7 +317,6 @@ static int is_local_filesystem(int Fd) {
 static int isMmapSafe(int Fd) {
   if (getenv("LLVM_NO_MMAP")) // For testing purposes.
     return 0;
-  (void)&is_local_filesystem; // a fake reference to satisfy -Wunused-function
 #ifdef _AIX
   return is_local_filesystem(Fd);
 #else