diff -ur qt-everywhere-opensource-src-4.6.0.orig/src/corelib/tools/qlocale.cpp qt-everywhere-opensource-src-4.6.0/src/corelib/tools/qlocale.cpp
--- qt-everywhere-opensource-src-4.6.0.orig/src/corelib/tools/qlocale.cpp	2008-09-27 10:00:55.000000000 +0100
+++ qt-everywhere-opensource-src-4.6.0/src/corelib/tools/qlocale.cpp	2009-02-02 11:39:40.000000000 +0000
@@ -6522,6 +6522,10 @@
 
 Q_CORE_EXPORT char *qdtoa ( double d, int mode, int ndigits, int *decpt, int *sign, char **rve, char **resultp)
 {
+    // RWMJ: The 8087-twiddling functions just don't seem to exist
+    // in MinGW cross-compiler, so comment out that code and hope for
+    // the best ...
+#if 0
     // Some values of the floating-point control word can cause _qdtoa to crash with an underflow.
     // We set a safe value here.
 #ifdef Q_OS_WIN
@@ -6536,6 +6540,7 @@
 #endif
     _control87(MCW_EM, MCW_EM);
 #endif
+#endif
 
 #if defined(Q_OS_LINUX) && !defined(__UCLIBC__)
     fenv_t envp;
@@ -6544,6 +6549,7 @@
 
     char *s = _qdtoa(d, mode, ndigits, decpt, sign, rve, resultp);
 
+#if 0 // RWMJ - see above.
 #ifdef Q_OS_WIN
     _clear87();
 #ifndef _M_X64
@@ -6552,6 +6558,7 @@
     _control87(oldbits, _MCW_EM|_MCW_DN|_MCW_RC);
 #endif //_M_X64
 #endif //Q_OS_WIN
+#endif
 
 #if defined(Q_OS_LINUX) && !defined(__UCLIBC__)
     fesetenv(&envp);