From cd8055c7353838a9624308ed822c450b18d15d4a Mon Sep 17 00:00:00 2001
From: andreas_kupries <akupries@shaw.ca>
Date: Tue, 1 Apr 2008 20:08:20 +0000
Subject: 	* generic/tclStrToD.c: Applied patch for [Bug 1839067] (fp 
 * unix/tcl.m4: rounding setup on solaris x86, native cc), provided 	  by
 Michael Schlenker.

---
 ChangeLog           |  6 ++++++
 generic/tclStrToD.c | 21 ++++++++++++++++++++-
 unix/tcl.m4         | 23 +++++++++++++++++++++--
 3 files changed, 47 insertions(+), 3 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 895a5f6..ae1947d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2008-04-01  Andreas Kupries  <andreask@activestate.com>
+
+	* generic/tclStrToD.c: Applied patch for [Bug 1839067] (fp
+	* unix/tcl.m4: rounding setup on solaris x86, native cc), provided
+	  by Michael Schlenker.
+
 2008-04-01  Don Porter	<dgp@users.sourceforge.net>
 
 	* generic/tclStubLib.c (Tcl_InitStubs):	Added missing error message.
diff --git a/generic/tclStrToD.c b/generic/tclStrToD.c
index e5e863b..2b4cde7 100755
--- a/generic/tclStrToD.c
+++ b/generic/tclStrToD.c
@@ -14,7 +14,7 @@
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
  *
- * RCS: @(#) $Id: tclStrToD.c,v 1.33 2008/03/13 17:14:19 dgp Exp $
+ * RCS: @(#) $Id: tclStrToD.c,v 1.34 2008/04/01 20:08:22 andreas_kupries Exp $
  *
  *----------------------------------------------------------------------
  */
@@ -61,6 +61,13 @@ typedef unsigned int fpu_control_t __attribute__ ((__mode__ (__HI__)));
 #   define ADJUST_FPU_CONTROL_WORD
 #endif
 
+/* Sun ProC needs sunmath for rounding control on x86 like gcc above.
+ *
+ *
+ */
+#if defined(__sun) && defined(__i386) && !defined(__GNUC__)
+#include <sunmath.h>
+#endif
 /*
  * HP's PA_RISC architecture uses 7ff4000000000000 to represent a quiet NaN.
  * Everyone else uses 7ff8000000000000. (Why, HP, why?)
@@ -1309,6 +1316,9 @@ MakeLowPrecisionDouble(
     _FPU_GETCW(oldRoundingMode);
     _FPU_SETCW(roundTo53Bits);
 #endif
+#if defined(__sun) && defined(__i386) && !defined(__GNUC__)
+    ieee_flags("set","precision","double",NULL);
+#endif
 
     /*
      * Test for the easy cases.
@@ -1381,6 +1391,9 @@ MakeLowPrecisionDouble(
 #if defined(__GNUC__) && defined(__i386)
     _FPU_SETCW(oldRoundingMode);
 #endif
+#if defined(__sun) && defined(__i386) && !defined(__GNUC__)
+    ieee_flags("clear","precision",NULL,NULL);
+#endif
 
     return retval;
 }
@@ -1427,6 +1440,9 @@ MakeHighPrecisionDouble(
     _FPU_GETCW(oldRoundingMode);
     _FPU_SETCW(roundTo53Bits);
 #endif
+#if defined(__sun) && defined(__i386) && !defined(__GNUC__)
+    ieee_flags("set","precision","double",NULL);
+#endif
 
     /*
      * Quick checks for over/underflow.
@@ -1485,6 +1501,9 @@ MakeHighPrecisionDouble(
 #if defined(__GNUC__) && defined(__i386)
     _FPU_SETCW(oldRoundingMode);
 #endif
+#if defined(__sun) && defined(__i386) && !defined(__GNUC__)
+    ieee_flags("clear","precision",NULL,NULL);
+#endif
     return retval;
 }
 
diff --git a/unix/tcl.m4 b/unix/tcl.m4
index 0b69ba0..1550ab0 100644
--- a/unix/tcl.m4
+++ b/unix/tcl.m4
@@ -1931,6 +1931,24 @@ dnl AC_CHECK_TOOL(AR, ar)
 		], [AC_MSG_WARN([64bit mode not supported for $arch])])])
 	    ])
 	    
+	    #--------------------------------------------------------------------
+	    # On Solaris 5.x i386 with the sunpro compiler we need to link
+    	    # with sunmath to get floating point rounding control
+    	    #--------------------------------------------------------------------
+    	    AS_IF([test "$GCC" = yes],[use_sunmath=no],[
+		arch=`isainfo`
+	    	AC_MSG_CHECKING([whether to use -lsunmath for fp rounding control])
+		AS_IF([test "$arch" = "amd64 i386"], [
+                        AC_MSG_RESULT([yes])
+			MATH_LIBS="-lsunmath $MATH_LIBS"
+                        AC_CHECK_HEADER(sunmath.h)
+			use_sunmath=yes
+        		], [
+			AC_MSG_RESULT([no])
+			use_sunmath=no
+        	])
+    	    ])
+	    
 	    # Note: need the LIBS below, otherwise Tk won't find Tcl's
 	    # symbols when dynamically loaded into tclsh.
 
@@ -1952,11 +1970,12 @@ dnl AC_CHECK_TOOL(AR, ar)
 		    #CC_SEARCH_FLAGS="${CC_SEARCH_FLAGS},-R,$v9gcclibdir"
 		])
 	    ], [
+	        AS_IF([test "$use_sunmath" = yes], [textmode=textoff],[textmode=text])
 		case $system in
 		    SunOS-5.[[1-9]][[0-9]]*)
-			SHLIB_LD='${CC} -G -z text ${LDFLAGS}';;
+			SHLIB_LD="${CC} -G -z $textmode \${LDFLAGS}";;
 		    *)
-			SHLIB_LD='/usr/ccs/bin/ld -G -z text';;
+			SHLIB_LD="/usr/ccs/bin/ld -G -z $textmode";;
 		esac
 		CC_SEARCH_FLAGS='-Wl,-R,${LIB_RUNTIME_DIR}'
 		LD_SEARCH_FLAGS='-R ${LIB_RUNTIME_DIR}'
-- 
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