msvcrt: Import lroundf implementation from musl.

configure

@@ -19642,7 +19642,6 @@ for ac_func in \
 	lrint \
 	lrintf \
 	lround \
-	lroundf \
 	nearbyint \
 	nearbyintf \
 	nexttoward \

configure.ac

@@ -2685,7 +2685,6 @@ AC_CHECK_FUNCS(\
 	lrint \
 	lrintf \
 	lround \
-	lroundf \
 	nearbyint \
 	nearbyintf \
 	nexttoward \

dlls/msvcrt/math.c

@@ -4368,10 +4368,17 @@ __msvcrt_long CDECL lround(double x)
 
 /*********************************************************************
  *      lroundf (MSVCR120.@)
+ *
+ * Copied from musl: src/math/lroundf.c
  */
 __msvcrt_long CDECL lroundf(float x)
 {
-    return unix_funcs->lroundf( x );
+    float f = roundf(x);
+    if (f != (float)(__msvcrt_long)f) {
+        *_errno() = EDOM;
+        return 0;
+    }
+    return f;
 }
 
 /*********************************************************************

dlls/msvcrt/unixlib.c

@@ -778,18 +778,6 @@ static int CDECL unix_lround(double x)
 }
 
 /*********************************************************************
- *      lroundf
- */
-static int CDECL unix_lroundf(float x)
-{
-#ifdef HAVE_LROUNDF
-    return lroundf(x);
-#else
-    return unix_lround(x);
-#endif
-}
-
-/*********************************************************************
  *      sin
  */
 static double CDECL unix_sin( double x )
@@ -957,7 +945,6 @@ static const struct unix_funcs funcs =
     unix_lrint,
     unix_lrintf,
     unix_lround,
-    unix_lroundf,
     unix_modf,
     unix_modff,
     unix_nearbyint,

dlls/msvcrt/unixlib.h

@@ -75,7 +75,6 @@ struct unix_funcs
     int             (CDECL *lrint)(double x);
     int             (CDECL *lrintf)(float x);
     int             (CDECL *lround)(double x);
-    int             (CDECL *lroundf)(float x);
     double          (CDECL *modf)(double x, double *iptr);
     float           (CDECL *modff)(float x, float *iptr);
     double          (CDECL *nearbyint)(double num);

include/config.h.in

@@ -480,9 +480,6 @@
 /* Define to 1 if you have the `lround' function. */
 #undef HAVE_LROUND
 
-/* Define to 1 if you have the `lroundf' function. */
-#undef HAVE_LROUNDF
-
 /* Define to 1 if you have the `lstat' function. */
 #undef HAVE_LSTAT