diff --git a/libgcc/config/arm/fp16.c b/libgcc/config/arm/fp16.c
index e8f7afbb528..36645036ff4 100644
--- a/libgcc/config/arm/fp16.c
+++ b/libgcc/config/arm/fp16.c
@@ -52,6 +52,14 @@ binary64 =
   52     /* significand.  */
 };
 
+/* Function prototypes.  */
+unsigned short __gnu_f2h_ieee (unsigned int a);
+unsigned int __gnu_h2f_ieee (unsigned short a);
+unsigned short __gnu_f2h_alternative (unsigned int x);
+unsigned int __gnu_h2f_alternative (unsigned short a);
+unsigned short __gnu_d2h_ieee (unsigned long long a);
+unsigned short __gnu_d2h_alternative (unsigned long long x);
+
 static inline unsigned short
 __gnu_float2h_internal (const struct format* fmt,
 			unsigned long long a, int ieee)
@@ -165,7 +173,7 @@ __gnu_d2h_internal (unsigned long long a, int ieee)
   return __gnu_float2h_internal (&binary64, a, ieee);
 }
 
-unsigned int
+static inline unsigned int
 __gnu_h2f_internal(unsigned short a, int ieee)
 {
   unsigned int sign = (unsigned int)(a & 0x8000) << 16;