From 9b888cc4de6414c6f163da58f8f50329a1f10e58 Mon Sep 17 00:00:00 2001
From: wolf <wolf@0785d39b-7218-0410-832d-ea1e28bc413d>
Date: Tue, 19 Sep 2000 09:35:16 +0000
Subject: [PATCH] Check for _isnan besides for isnan.

git-svn-id: https://svn.dealii.org/trunk@3337 0785d39b-7218-0410-832d-ea1e28bc413d
---
 deal.II/configure                    | 224 ++++++++++++++++++++-------
 deal.II/lac/source/solver_control.cc |   6 +
 2 files changed, 170 insertions(+), 60 deletions(-)

diff --git a/deal.II/configure b/deal.II/configure
index 9a94116c43..5a774d3269 100755
--- a/deal.II/configure
+++ b/deal.II/configure
@@ -1,6 +1,6 @@
 #! /bin/sh
 
-# From configure.in Revision: 1.33 
+# From configure.in Revision: 1.34 
 
 
 
@@ -1700,8 +1700,9 @@ rm -f conftest*
 echo "configure:1701: checking whether isnan is declared with debug flags" >&5
   
   CXXFLAGS=$CXXFLAGSG
+  deal_II_isnan_flag=""
   cat > conftest.$ac_ext <<EOF
-#line 1705 "configure"
+#line 1706 "configure"
 #include "confdefs.h"
 
 #include <cmath>
@@ -1713,7 +1714,7 @@ int main() {
     
 ; return 0; }
 EOF
-if { (eval echo configure:1717: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:1718: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   
 	echo "$ac_t"""yes"" 1>&6
@@ -1723,57 +1724,109 @@ if { (eval echo configure:1717: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5;
 else
   echo "configure: failed program was:" >&5
   cat conftest.$ac_ext >&5
-  rm -rf conftest*
-  
-			deal_II_isnan_flag=""
-	for testflag in -D_ISOC99_SOURCE -D__EXTENSIONS__ ; do 
-	  CXXFLAGS="$CXXFLAGSG $testflag"
-          cat > conftest.$ac_ext <<EOF
-#line 1733 "configure"
+fi
+rm -f conftest*
+
+
+  if test $deal_II_isnan_flag = "" ; then
+            cat > conftest.$ac_ext <<EOF
+#line 1734 "configure"
 #include "confdefs.h"
 
 #include <cmath>
-	    
+      
 int main() {
 
-		double d=0;
-		isnan (d);
-	    
+	  double d=0;
+	  _isnan (d);
+      
 ; return 0; }
 EOF
-if { (eval echo configure:1745: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:1746: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   
-	  					deal_II_isnan_flag="-DHAVE_ISNAN $testflag"
-		break;
-	    
+	  echo "$ac_t"""yes"" 1>&6
+	  deal_II_isnan_flag="-DHAVE_UNDERSCORE_ISNAN"
+	  CXXFLAGSG="$deal_II_isnan_flag $CXXFLAGSG"
+      
 else
   echo "configure: failed program was:" >&5
   cat conftest.$ac_ext >&5
+fi
+rm -f conftest*
+  fi
+
+
+    if test $deal_II_isnan_flag = "" ; then
+            deal_II_isnan_flag=""
+    for testflag in -D_ISOC99_SOURCE -D__EXTENSIONS__ ; do 
+      CXXFLAGS="$CXXFLAGSG $testflag"
+      cat > conftest.$ac_ext <<EOF
+#line 1766 "configure"
+#include "confdefs.h"
+
+#include <cmath>
+	
+int main() {
+
+	  double d=0;
+	  isnan (d);
+	
+; return 0; }
+EOF
+if { (eval echo configure:1778: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   
-                	    
+	  	  	  deal_II_isnan_flag="-DHAVE_ISNAN $testflag"
+	  break;
+	
+else
+  echo "configure: failed program was:" >&5
+  cat conftest.$ac_ext >&5
 fi
 rm -f conftest*
-	done
 
-				if test "$deal_II_isnan_flag" = "" ; then
-	  echo "$ac_t""no." 1>&6
-	else
+                        cat > conftest.$ac_ext <<EOF
+#line 1791 "configure"
+#include "confdefs.h"
 
-  	  	  echo "$ac_t""using $testflag" 1>&6
-	  CXXFLAGSG="$deal_II_isnan_flag $CXXFLAGSG"
-	fi
-    
+#include <cmath>
+	
+int main() {
+
+	  double d=0;
+	  _isnan (d);
+	
+; return 0; }
+EOF
+if { (eval echo configure:1803: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+  rm -rf conftest*
+  
+	  	  	  deal_II_isnan_flag="-DHAVE_UNDERSCORE_ISNAN $testflag"
+	  break;
+	
+else
+  echo "configure: failed program was:" >&5
+  cat conftest.$ac_ext >&5
 fi
 rm -f conftest*
+    done
+
+                if test "$deal_II_isnan_flag" = "" ; then
+      echo "$ac_t""no." 1>&6
+    else
+            echo "$ac_t""using $testflag" 1>&6
+      CXXFLAGSG="$deal_II_isnan_flag $CXXFLAGSG"
+    fi
+  fi
 
     echo $ac_n "checking whether isnan is declared with optimized flags""... $ac_c" 1>&6
-echo "configure:1773: checking whether isnan is declared with optimized flags" >&5
+echo "configure:1825: checking whether isnan is declared with optimized flags" >&5
   
   CXXFLAGS=$CXXFLAGSO
+  deal_II_isnan_flag=""
   cat > conftest.$ac_ext <<EOF
-#line 1777 "configure"
+#line 1830 "configure"
 #include "confdefs.h"
 
 #include <cmath>
@@ -1785,7 +1838,7 @@ int main() {
     
 ; return 0; }
 EOF
-if { (eval echo configure:1789: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:1842: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   
 	echo "$ac_t"""yes"" 1>&6
@@ -1795,50 +1848,101 @@ if { (eval echo configure:1789: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5;
 else
   echo "configure: failed program was:" >&5
   cat conftest.$ac_ext >&5
-  rm -rf conftest*
-  
-			deal_II_isnan_flag=""
-	for testflag in -D_ISOC99_SOURCE -D__EXTENSIONS__ ; do 
-	  CXXFLAGS="$CXXFLAGSO $testflag"
-          cat > conftest.$ac_ext <<EOF
-#line 1805 "configure"
+fi
+rm -f conftest*
+
+
+  if test $deal_II_isnan_flag = "" ; then
+            cat > conftest.$ac_ext <<EOF
+#line 1858 "configure"
 #include "confdefs.h"
 
 #include <cmath>
-	    
+      
 int main() {
 
-		double d=0;
-		isnan (d);
-	    
+	  double d=0;
+	  _isnan (d);
+      
 ; return 0; }
 EOF
-if { (eval echo configure:1817: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:1870: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   
-	  					deal_II_isnan_flag="-DHAVE_ISNAN $testflag"
-		break;
-	    
+	  echo "$ac_t"""yes"" 1>&6
+	  deal_II_isnan_flag="-DHAVE_UNDERSCORE_ISNAN"
+	  CXXFLAGSO="$deal_II_isnan_flag $CXXFLAGSO"
+      
 else
   echo "configure: failed program was:" >&5
   cat conftest.$ac_ext >&5
+fi
+rm -f conftest*
+  fi
+
+
+    if test $deal_II_isnan_flag = "" ; then
+            deal_II_isnan_flag=""
+    for testflag in -D_ISOC99_SOURCE -D__EXTENSIONS__ ; do 
+      CXXFLAGS="$CXXFLAGSO $testflag"
+      cat > conftest.$ac_ext <<EOF
+#line 1890 "configure"
+#include "confdefs.h"
+
+#include <cmath>
+	
+int main() {
+
+	  double d=0;
+	  isnan (d);
+	
+; return 0; }
+EOF
+if { (eval echo configure:1902: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   
-                	    
+	  	  	  deal_II_isnan_flag="-DHAVE_ISNAN $testflag"
+	  break;
+	
+else
+  echo "configure: failed program was:" >&5
+  cat conftest.$ac_ext >&5
 fi
 rm -f conftest*
-	done
 
-				if test "$deal_II_isnan_flag" = "" ; then
-	  echo "$ac_t""no." 1>&6
-	else
+                        cat > conftest.$ac_ext <<EOF
+#line 1915 "configure"
+#include "confdefs.h"
 
-  	  	  echo "$ac_t""using $testflag" 1>&6
-	  CXXFLAGSO="$deal_II_isnan_flag $CXXFLAGSO"
-	fi
-    
+#include <cmath>
+	
+int main() {
+
+	  double d=0;
+	  _isnan (d);
+	
+; return 0; }
+EOF
+if { (eval echo configure:1927: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+  rm -rf conftest*
+  
+	  	  	  deal_II_isnan_flag="-DHAVE_UNDERSCORE_ISNAN $testflag"
+	  break;
+	
+else
+  echo "configure: failed program was:" >&5
+  cat conftest.$ac_ext >&5
 fi
 rm -f conftest*
+    done
+
+                if test "$deal_II_isnan_flag" = "" ; then
+      echo "$ac_t""no." 1>&6
+    else
+            echo "$ac_t""using $testflag" 1>&6
+      CXXFLAGSO="$deal_II_isnan_flag $CXXFLAGSO"
+    fi
+  fi
 
 
 
@@ -1859,16 +1963,16 @@ esac
 
 CXXFLAGS="$CXXFLAGSG"
 echo $ac_n "checking for consistency of CXXFLAGSG flags""... $ac_c" 1>&6
-echo "configure:1863: checking for consistency of CXXFLAGSG flags" >&5
+echo "configure:1967: checking for consistency of CXXFLAGSG flags" >&5
 cat > conftest.$ac_ext <<EOF
-#line 1865 "configure"
+#line 1969 "configure"
 #include "confdefs.h"
 
 int main() {
 ;
 ; return 0; }
 EOF
-if { (eval echo configure:1872: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:1976: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   
     echo "$ac_t""yes" 1>&6
@@ -1886,16 +1990,16 @@ rm -f conftest*
 
 CXXFLAGS="$CXXFLAGSO"
 echo $ac_n "checking for consistency of CXXFLAGSO flags""... $ac_c" 1>&6
-echo "configure:1890: checking for consistency of CXXFLAGSO flags" >&5
+echo "configure:1994: checking for consistency of CXXFLAGSO flags" >&5
 cat > conftest.$ac_ext <<EOF
-#line 1892 "configure"
+#line 1996 "configure"
 #include "confdefs.h"
 
 int main() {
 ;
 ; return 0; }
 EOF
-if { (eval echo configure:1899: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:2003: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   
     echo "$ac_t""yes" 1>&6
diff --git a/deal.II/lac/source/solver_control.cc b/deal.II/lac/source/solver_control.cc
index faeb234e67..e56f9951ed 100644
--- a/deal.II/lac/source/solver_control.cc
+++ b/deal.II/lac/source/solver_control.cc
@@ -68,6 +68,12 @@ SolverControl::check (const unsigned int step,
   if ((step >= maxsteps) ||
 #ifdef HAVE_ISNAN
       isnan(check_value) ||
+#else
+#  if HAVE_UNDERSCORE_ISNAN
+				       // on Microsoft Windows, the
+				       // function is called _isnan
+      _isnan(check_value) ||
+#  endif
 #endif
       (check_failure && (check_value > failure_residual))
   )
-- 
2.39.5