From acd2f1e59bd22197b63eb5ae4ac0d621a0b8cce0 Mon Sep 17 00:00:00 2001
From: Alex Henrie <alexhenrie24@gmail.com>
Date: Fri, 2 Mar 2018 10:02:46 -0700
Subject: [PATCH] msvcrt: Compile but show an error if Bessel functions aren't
 available.

Signed-off-by: Alex Henrie <alexhenrie24@gmail.com>
Signed-off-by: Piotr Caban <piotr@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
---
 configure           |  8 +++++++-
 configure.ac        |  8 +++++++-
 dlls/msvcrt/math.c  | 36 +++++++++++++++++++++++++++++++++---
 include/config.h.in | 18 ++++++++++++++++++
 4 files changed, 65 insertions(+), 5 deletions(-)

diff --git a/configure b/configure
index fdcdfd72112..397677e361b 100755
--- a/configure
+++ b/configure
@@ -17649,6 +17649,9 @@ for ac_func in \
 	exp2f \
 	expm1 \
 	expm1f \
+	j0 \
+	j1 \
+	jn \
 	lgamma \
 	lgammaf \
 	llrint \
@@ -17673,7 +17676,10 @@ for ac_func in \
 	round \
 	roundf \
 	trunc \
-	truncf
+	truncf \
+	y0 \
+	y1 \
+	yn
 
 do :
   as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
diff --git a/configure.ac b/configure.ac
index 43fdb0c7383..cfc2080c162 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2698,6 +2698,9 @@ AC_CHECK_FUNCS(\
 	exp2f \
 	expm1 \
 	expm1f \
+	j0 \
+	j1 \
+	jn \
 	lgamma \
 	lgammaf \
 	llrint \
@@ -2722,7 +2725,10 @@ AC_CHECK_FUNCS(\
 	round \
 	roundf \
 	trunc \
-	truncf
+	truncf \
+	y0 \
+	y1 \
+	yn
 )
 LIBS="$ac_save_LIBS"
 
diff --git a/dlls/msvcrt/math.c b/dlls/msvcrt/math.c
index 9b480117fcc..a3af78a7985 100644
--- a/dlls/msvcrt/math.c
+++ b/dlls/msvcrt/math.c
@@ -1412,7 +1412,12 @@ INT CDECL MSVCRT__isnan(double num)
 double CDECL MSVCRT__j0(double num)
 {
   /* FIXME: errno handling */
+#ifdef HAVE_J0
   return j0(num);
+#else
+  FIXME("not implemented\n");
+  return 0;
+#endif
 }
 
 /*********************************************************************
@@ -1421,7 +1426,12 @@ double CDECL MSVCRT__j0(double num)
 double CDECL MSVCRT__j1(double num)
 {
   /* FIXME: errno handling */
+#ifdef HAVE_J1
   return j1(num);
+#else
+  FIXME("not implemented\n");
+  return 0;
+#endif
 }
 
 /*********************************************************************
@@ -1430,7 +1440,12 @@ double CDECL MSVCRT__j1(double num)
 double CDECL MSVCRT__jn(int n, double num)
 {
   /* FIXME: errno handling */
+#ifdef HAVE_JN
   return jn(n, num);
+#else
+  FIXME("not implemented\n");
+  return 0;
+#endif
 }
 
 /*********************************************************************
@@ -1440,12 +1455,17 @@ double CDECL MSVCRT__y0(double num)
 {
   double retval;
   if (!isfinite(num)) *MSVCRT__errno() = MSVCRT_EDOM;
+#ifdef HAVE_Y0
   retval  = y0(num);
   if (MSVCRT__fpclass(retval) == MSVCRT__FPCLASS_NINF)
   {
     *MSVCRT__errno() = MSVCRT_EDOM;
-    retval = sqrt(-1);
+    retval = NAN;
   }
+#else
+  FIXME("not implemented\n");
+  retval = 0;
+#endif
   return retval;
 }
 
@@ -1456,12 +1476,17 @@ double CDECL MSVCRT__y1(double num)
 {
   double retval;
   if (!isfinite(num)) *MSVCRT__errno() = MSVCRT_EDOM;
+#ifdef HAVE_Y1
   retval  = y1(num);
   if (MSVCRT__fpclass(retval) == MSVCRT__FPCLASS_NINF)
   {
     *MSVCRT__errno() = MSVCRT_EDOM;
-    retval = sqrt(-1);
+    retval = NAN;
   }
+#else
+  FIXME("not implemented\n");
+  retval = 0;
+#endif
   return retval;
 }
 
@@ -1472,12 +1497,17 @@ double CDECL MSVCRT__yn(int order, double num)
 {
   double retval;
   if (!isfinite(num)) *MSVCRT__errno() = MSVCRT_EDOM;
+#ifdef HAVE_YN
   retval  = yn(order,num);
   if (MSVCRT__fpclass(retval) == MSVCRT__FPCLASS_NINF)
   {
     *MSVCRT__errno() = MSVCRT_EDOM;
-    retval = sqrt(-1);
+    retval = NAN;
   }
+#else
+  FIXME("not implemented\n");
+  retval = 0;
+#endif
   return retval;
 }
 
diff --git a/include/config.h.in b/include/config.h.in
index 353c1463881..3346b01958f 100644
--- a/include/config.h.in
+++ b/include/config.h.in
@@ -342,6 +342,15 @@
 /* Define to 1 if you have the `isnanf' function. */
 #undef HAVE_ISNANF
 
+/* Define to 1 if you have the `j0' function. */
+#undef HAVE_J0
+
+/* Define to 1 if you have the `j1' function. */
+#undef HAVE_J1
+
+/* Define to 1 if you have the `jn' function. */
+#undef HAVE_JN
+
 /* Define to 1 if you have the <jpeglib.h> header file. */
 #undef HAVE_JPEGLIB_H
 
@@ -1365,6 +1374,15 @@
 /* Define if Xrandr has the XRRGetScreenResources function */
 #undef HAVE_XRRGETSCREENRESOURCES
 
+/* Define to 1 if you have the `y0' function. */
+#undef HAVE_Y0
+
+/* Define to 1 if you have the `y1' function. */
+#undef HAVE_Y1
+
+/* Define to 1 if you have the `yn' function. */
+#undef HAVE_YN
+
 /* Define to 1 if you have the `z' library (-lz). */
 #undef HAVE_ZLIB