------- Comment #1 from fxcoudert at gcc dot gnu dot org  2009-09-03 14:40 
-------
It's because of this in gcc/config/i386/mingw-w64.h:

#define ASM_SPEC "%{v:-V} %{n} %{T} %{Ym,*} %{Yd,*} \
 %{Wa,*:%*} %{m32:--32} %{m64:--64}"


The "%{v:-V}" part is what's triggering what you see. Now, the question is why
is your as rejecting the -V option? My linux as accepts it, my darwin as also,
but i586-pc-mingw32-as doesn't...

After further investigation, it seems that handling the option -V on i386
processors is only done for ELF targets; can't even begin to think of a good
reason for that, but that's what gas source code says. So, I recommend the
following (untested) patch to GCC:

Index: gcc/config/i386/mingw-w64.h
===================================================================
--- gcc/config/i386/mingw-w64.h (revision 151373)
+++ gcc/config/i386/mingw-w64.h (working copy)
@@ -36,7 +36,7 @@
 /* Enable multilib.  */

 #undef ASM_SPEC
-#define ASM_SPEC "%{v:-V} %{n} %{T} %{Ym,*} %{Yd,*} \
+#define ASM_SPEC "%{v} %{n} %{T} %{Ym,*} %{Yd,*} \
  %{Wa,*:%*} %{m32:--32} %{m64:--64}"

 #if TARGET_64BIT_DEFAULT


-- 

fxcoudert at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |fxcoudert at gcc dot gnu dot
                   |                            |org
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
           Keywords|                            |patch
   Last reconfirmed|0000-00-00 00:00:00         |2009-09-03 14:40:55
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41024

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