Fix frexp, modf, lgamma_r (fix #1374)

src/libm.h

@@ -214,11 +214,6 @@ LIBM_DDD(fmod)
 #else
 LIBM_DDD_NO(fmod)
 #endif
-#ifdef HAVE_FREXP
-LIBM_DDD(frexp)
-#else
-LIBM_DDD_NO(frexp)
-#endif
 #ifdef HAVE_GAMMA
 LIBM_DD(gamma)
 #else
@@ -239,11 +234,6 @@ LIBM_DD(logb)
 #else
 LIBM_DD_NO(logb)
 #endif
-#ifdef HAVE_MODF
-LIBM_DDD(modf)
-#else
-LIBM_DDD_NO(modf)
-#endif
 #ifdef HAVE_NEARBYINT
 LIBM_DD(nearbyint)
 #else