msvcrt: Import lround implementation from musl.

configure

@@ -19641,7 +19641,6 @@ for ac_func in \
 	log2f \
 	lrint \
 	lrintf \
-	lround \
 	nearbyint \
 	nearbyintf \
 	nexttoward \

configure.ac

@@ -2684,7 +2684,6 @@ AC_CHECK_FUNCS(\
 	log2f \
 	lrint \
 	lrintf \
-	lround \
 	nearbyint \
 	nearbyintf \
 	nexttoward \

dlls/msvcrt/math.c

@@ -4360,10 +4360,17 @@ float CDECL roundf(float x)
 
 /*********************************************************************
  *      lround (MSVCR120.@)
+ *
+ * Copied from musl: src/math/lround.c
  */
 __msvcrt_long CDECL lround(double x)
 {
-    return unix_funcs->lround( x );
+    double d = round(x);
+    if (d != (double)(__msvcrt_long)d) {
+        *_errno() = EDOM;
+        return 0;
+    }
+    return d;
 }
 
 /*********************************************************************

dlls/msvcrt/unixlib.c

@@ -766,18 +766,6 @@ static double CDECL unix_round(double x)
 }
 
 /*********************************************************************
- *      lround
- */
-static int CDECL unix_lround(double x)
-{
-#ifdef HAVE_LROUND
-    return lround(x);
-#else
-    return unix_round(x);
-#endif
-}
-
-/*********************************************************************
  *      sin
  */
 static double CDECL unix_sin( double x )
@@ -944,7 +932,6 @@ static const struct unix_funcs funcs =
     unix_logbf,
     unix_lrint,
     unix_lrintf,
-    unix_lround,
     unix_modf,
     unix_modff,
     unix_nearbyint,

dlls/msvcrt/unixlib.h

@@ -74,7 +74,6 @@ struct unix_funcs
     float           (CDECL *logbf)(float x);
     int             (CDECL *lrint)(double x);
     int             (CDECL *lrintf)(float x);
-    int             (CDECL *lround)(double x);
     double          (CDECL *modf)(double x, double *iptr);
     float           (CDECL *modff)(float x, float *iptr);
     double          (CDECL *nearbyint)(double num);

include/config.h.in

@@ -477,9 +477,6 @@
 /* Define to 1 if you have the `lrintf' function. */
 #undef HAVE_LRINTF
 
-/* Define to 1 if you have the `lround' function. */
-#undef HAVE_LROUND
-
 /* Define to 1 if you have the `lstat' function. */
 #undef HAVE_LSTAT