From 69ad3c11cfb00b518c78103525e3452502173195 Mon Sep 17 00:00:00 2001
From: Piotr Caban <piotr@codeweavers.com>
Date: Thu, 29 Apr 2021 17:06:38 +0200
Subject: [PATCH] msvcrt: Import lround implementation from musl.

Signed-off-by: Piotr Caban <piotr@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
---
 configure             |  1 -
 configure.ac          |  1 -
 dlls/msvcrt/math.c    |  9 ++++++++-
 dlls/msvcrt/unixlib.c | 13 -------------
 dlls/msvcrt/unixlib.h |  1 -
 include/config.h.in   |  3 ---
 6 files changed, 8 insertions(+), 20 deletions(-)

diff --git a/configure b/configure
index 794a3e09c29..2251a30af72 100755
--- a/configure
+++ b/configure
@@ -19641,7 +19641,6 @@ for ac_func in \
 	log2f \
 	lrint \
 	lrintf \
-	lround \
 	nearbyint \
 	nearbyintf \
 	nexttoward \
diff --git a/configure.ac b/configure.ac
index 3bfa2885002..20ec971b5bb 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2684,7 +2684,6 @@ AC_CHECK_FUNCS(\
 	log2f \
 	lrint \
 	lrintf \
-	lround \
 	nearbyint \
 	nearbyintf \
 	nexttoward \
diff --git a/dlls/msvcrt/math.c b/dlls/msvcrt/math.c
index e1251ba7115..018a8ae47e4 100644
--- a/dlls/msvcrt/math.c
+++ b/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;
 }
 
 /*********************************************************************
diff --git a/dlls/msvcrt/unixlib.c b/dlls/msvcrt/unixlib.c
index 3bf99c09c24..a7c7202c516 100644
--- a/dlls/msvcrt/unixlib.c
+++ b/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,
diff --git a/dlls/msvcrt/unixlib.h b/dlls/msvcrt/unixlib.h
index c74115bc76c..89972ed669f 100644
--- a/dlls/msvcrt/unixlib.h
+++ b/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);
diff --git a/include/config.h.in b/include/config.h.in
index 544fe85b248..387c8b718ff 100644
--- a/include/config.h.in
+++ b/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
 
-- 
2.11.4.GIT