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X-HELO:	chlothar.bnv-bamberg.de
To:	"cygwin AT cygwin DOT com" <cygwin AT cygwin DOT com>
Date:	Thu, 10 Sep 2015 01:30:14 +0200
Subject:	Cygwin 32bit: Can't use gcc -mfpmath=sse
MIME-Version:	1.0
From:	HK <hk1020 AT t-online DOT de>
Message-ID:	<op.x4px8ooy6wtfvl@orion>
User-Agent:	Opera Mail/10.63 (Win32)

I've just run across this strange behavior on a recent 32bit installation:

  vega> cat hello.c
#include <stdio.h>
int main(int argc, char** argv){
printf("hello world\n");
}
  vega> gcc -mfpmath=sse hello.c
hello.c:1:0: warning: SSE instruction set disabled, using 387 arithmetics
  #include <stdio.h>
  ^

Why is this? I am pretty sure this used to work in the past.  On the 64bit
installtion it works just fine.

For reference:

  vega> gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/i686-pc-cygwin/4.9.3/lto-wrapper.exe
Target: i686-pc-cygwin
Configured with:  
/cygdrive/i/szsz/tmpp/gcc/gcc-4.9.3-1.i686/src/gcc-4.9.3/configure  
--srcdir=/cygdrive/i/szsz/tmpp/gcc/gcc-4.9.3-1.i686/src/gcc-4.9.3  
--prefix=/usr --exec-prefix=/usr --localstatedir=/var --sysconfdir=/etc  
--docdir=/usr/share/doc/gcc --htmldir=/usr/share/doc/gcc/html -C  
--build=i686-pc-cygwin --host=i686-pc-cygwin --target=i686-pc-cygwin  
--without-libiconv-prefix --without-libintl-prefix --libexecdir=/usr/lib  
--enable-shared --enable-shared-libgcc --enable-static  
--enable-version-specific-runtime-libs --enable-bootstrap  
--enable-__cxa_atexit --with-dwarf2 --with-arch=i686 --with-tune=generic  
--disable-sjlj-exceptions  
--enable-languages=ada,c,c++,fortran,java,lto,objc,obj-c++  
--enable-graphite --enable-threads=posix --enable-libatomic  
--enable-libgomp --disable-libitm --enable-libquadmath  
--enable-libquadmath-support --enable-libssp --enable-libada  
--enable-libjava --enable-libgcj-sublibs --disable-java-awt  
--disable-symvers --with-ecj-jar=/usr/share/java/ecj.jar --with-gnu-ld  
--with-gnu-as --with-cloog-include=/usr/include/cloog-isl  
--without-libiconv-prefix --without-libintl-prefix --with-system-zlib  
--enable-linker-build-id
Thread model: posix
gcc version 4.9.3 (GCC)
  vega>

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