[Bug target/51007] Quadmath I/O doesn't work on MinGW

[ktietz at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51007

--- Comment #5 from Kai Tietz <ktietz at gcc dot gnu.org> 2011-11-07 12:19:09 
UTC ---
Suggested patch for this issue

ChangeLog

        * quadmath-imp.h (ieee854_float128): Adjust
        for ms-bitfield layout.

Index: quadmath-imp.h
===================================================================
--- quadmath-imp.h      (revision 180840)
+++ quadmath-imp.h      (working copy)
@@ -48,6 +48,11 @@
   __float128 value;

   struct
+#ifdef __MINGW32__
+  /* On mingw targets ms-bitfields option is active by default.
+     Therefore enforce gnu-bitfield style.  */
+  __attribute__ ((gcc_struct))
+#endif
   {
 #if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
     unsigned negative:1;
@@ -89,6 +94,10 @@
   } words32;

   struct
+#ifdef __MINGW32__
+  /* Make sure we are using gnu-style bitfield handling.  */
+  __attribute__ ((gcc_struct))
+#endif
   {
 #if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
     unsigned negative:1;