Fix windows build

Right now, the Windows build is broken because of NBD.  Using a mingw32 cross
compiler is also badly broken.

This patch fixes the Windows build by stubbing out NBD support until someone
fixes it for Windows.  It also santizing the mingw32 cross compiler support
by replacing the --enable-mingw32 option with a compiler check to determine
if we're on windows or not.

Also remove the weird SDL pseudo-detection for mingw32 using a cross compiler.
The hardcoded sdl-config name is seemly arbitrary.  If you cross compiler SDL
correctly and modify your PATH variable appropriately, it will Just Work when
cross compiling.

The audio driver detection is also broken for cross compiling so you have to
specify the audio drivers explicitly for now.
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>




git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5046 c046a42c-6fe2-441c-8c8c-71466251a162

Makefile

@@ -46,7 +46,10 @@ recurse-all: $(SUBDIR_RULES)
 BLOCK_OBJS=cutils.o qemu-malloc.o
 BLOCK_OBJS+=block-cow.o block-qcow.o aes.o block-vmdk.o block-cloop.o
 BLOCK_OBJS+=block-dmg.o block-bochs.o block-vpc.o block-vvfat.o
-BLOCK_OBJS+=block-qcow2.o block-parallels.o block-nbd.o
+BLOCK_OBJS+=block-qcow2.o block-parallels.o
+ifndef CONFIG_WIN32
+BLOCK_OBJS+=block-nbd.o
+endif
 
 ######################################################################
 # libqemu_common.a: Target independent part of system emulation. The
@@ -54,10 +57,14 @@ BLOCK_OBJS+=block-qcow2.o block-parallels.o block-nbd.o
 # system emulation, i.e. a single QEMU executable should support all
 # CPUs and machines.
 
-OBJS=nbd.o $(BLOCK_OBJS)
+OBJS=$(BLOCK_OBJS)
 OBJS+=readline.o console.o
 OBJS+=block.o
 
+ifndef CONFIG_WIN32
+OBJS+=nbd.o
+endif
+
 OBJS+=irq.o
 OBJS+=i2c.o smbus.o smbus_eeprom.o max7310.o max111x.o wm8750.o
 OBJS+=ssd0303.o ssd0323.o ads7846.o stellaris_input.o twl92230.o
@@ -166,11 +173,11 @@ libqemu_user.a: $(USER_OBJS)
 	rm -f $@ 
 	$(AR) rcs $@ $(USER_OBJS)
 
-QEMU_IMG_BLOCK_OBJS = nbd.o $(BLOCK_OBJS)
+QEMU_IMG_BLOCK_OBJS = $(BLOCK_OBJS)
 ifdef CONFIG_WIN32
 QEMU_IMG_BLOCK_OBJS += qemu-img-block-raw-win32.o
 else
-QEMU_IMG_BLOCK_OBJS += qemu-img-block-raw-posix.o
+QEMU_IMG_BLOCK_OBJS += nbd.o qemu-img-block-raw-posix.o
 endif
 
 ######################################################################

block.c

@@ -1332,7 +1332,9 @@ void bdrv_init(void)
     bdrv_register(&bdrv_vvfat);
     bdrv_register(&bdrv_qcow2);
     bdrv_register(&bdrv_parallels);
+#ifndef _WIN32
     bdrv_register(&bdrv_nbd);
+#endif
 }
 
 void *qemu_aio_get(BlockDriverState *bs, BlockDriverCompletionFunc *cb,

configure

@@ -283,8 +283,6 @@ for opt do
   ;;
   --disable-vnc-tls) vnc_tls="no"
   ;;
-  --enable-mingw32) mingw32="yes" ; cross_prefix="i386-mingw32-" ; linux_user="no"
-  ;;
   --disable-slirp) slirp="no"
   ;;
   --disable-vde) vde="no"
@@ -347,13 +345,6 @@ for opt do
   esac
 done
 
-if [ "$bsd" = "yes" -o "$darwin" = "yes" -o "$mingw32" = "yes" ] ; then
-    AIOLIBS=
-else
-    # Some Linux architectures (e.g. s390) don't imply -lpthread automatically.
-    AIOLIBS="-lrt -lpthread"
-fi
-
 # default flags for all hosts
 CFLAGS="$CFLAGS -Wall -O2 -g -fno-strict-aliasing"
 LDFLAGS="$LDFLAGS -g"
@@ -423,7 +414,6 @@ echo "  --static                 enable static build [$static]"
 echo "  --disable-werror         disable compilation abort on warning"
 echo "  --disable-sdl            disable SDL"
 echo "  --enable-cocoa           enable COCOA (Mac OS X only)"
-echo "  --enable-mingw32         enable Win32 cross compilation with mingw32"
 echo "  --audio-drv-list=LIST    set audio drivers list:"
 echo "                           Available drivers: $audio_possible_drivers"
 echo "  --audio-card-list=LIST   set list of additional emulated audio cards"
@@ -467,10 +457,31 @@ else
     exit 1
 fi
 
+# check compiler to see if we're on mingw32
+cat > $TMPC <<EOF
+#include <windows.h>
+#ifndef _WIN32
+#error not windows
+#endif
+int main(void) {}
+EOF
+
+if $cc $ARCH_CFLAGS -c -o $TMPO $TMPC 2> /dev/null ; then
+    mingw32="yes"
+fi
+
 if test "$mingw32" = "yes" ; then
     linux="no"
     EXESUF=".exe"
     oss="no"
+    linux_user="no"
+fi
+
+if [ "$bsd" = "yes" -o "$darwin" = "yes" -o "$mingw32" = "yes" ] ; then
+    AIOLIBS=
+else
+    # Some Linux architectures (e.g. s390) don't imply -lpthread automatically.
+    AIOLIBS="-lrt -lpthread"
 fi
 
 # Check for gcc4, error if pre-gcc4
@@ -700,42 +711,35 @@ if test -z "$sdl" ; then
     sdl=no
     sdl_static=no
 
-    if test "$mingw32" = "yes" -a ! -z "$cross_prefix" ; then
-    # win32 cross compilation case
-        sdl_config="i386-mingw32msvc-sdl-config"
-        sdl=yes
-    else
-        # normal SDL probe
 cat > $TMPC << EOF
 #include <SDL.h>
 #undef main /* We don't want SDL to override our main() */
 int main( void ) { return SDL_Init (SDL_INIT_VIDEO); }
 EOF
-        if $cc $ARCH_CFLAGS -o $TMPE ${OS_CFLAGS} `$sdl_config --cflags 2> /dev/null` $TMPC `$sdl_config --libs 2> /dev/null` 2> /tmp/qemu-$$-sdl-config.log ; then
-            _sdlversion=`$sdl_config --version | sed 's/[^0-9]//g'`
-            if test "$_sdlversion" -lt 121 ; then
-                sdl_too_old=yes
-            else
-                if test "$cocoa" = "no" ; then
-                    sdl=yes
-                fi
+    if $cc $ARCH_CFLAGS -o $TMPE ${OS_CFLAGS} `$sdl_config --cflags 2> /dev/null` $TMPC `$sdl_config --libs 2> /dev/null` 2> /tmp/qemu-$$-sdl-config.log ; then
+        _sdlversion=`$sdl_config --version | sed 's/[^0-9]//g'`
+        if test "$_sdlversion" -lt 121 ; then
+            sdl_too_old=yes
+        else
+            if test "$cocoa" = "no" ; then
+                sdl=yes
             fi
+        fi
 
-            # static link with sdl ?
-            if test "$sdl" = "yes" ; then
-                aa="no"
-                `$sdl_config --static-libs 2>/dev/null | grep \\\-laa > /dev/null` && aa="yes"
-                sdl_static_libs=`$sdl_config --static-libs 2>/dev/null`
-                if [ "$aa" = "yes" ] ; then
-                    sdl_static_libs="$sdl_static_libs `aalib-config --static-libs`"
-                fi
-
-                if $cc -o $TMPE ${OS_CFLAGS} `$sdl_config --cflags 2> /dev/null` $TMPC $sdl_static_libs 2> /dev/null; then
-                    sdl_static=yes
-                fi
-            fi # static link
-        fi # sdl compile test
-    fi # cross compilation
+        # static link with sdl ?
+        if test "$sdl" = "yes" ; then
+            aa="no"
+            `$sdl_config --static-libs 2>/dev/null | grep \\\-laa > /dev/null` && aa="yes"
+            sdl_static_libs=`$sdl_config --static-libs 2>/dev/null`
+            if [ "$aa" = "yes" ] ; then
+                sdl_static_libs="$sdl_static_libs `aalib-config --static-libs`"
+            fi
+
+            if $cc -o $TMPE ${OS_CFLAGS} `$sdl_config --cflags 2> /dev/null` $TMPC $sdl_static_libs 2> /dev/null; then
+                sdl_static=yes
+            fi
+        fi # static link
+    fi # sdl compile test
 else
     # Make sure to disable cocoa if sdl was set
     if test "$sdl" = "yes" ; then