Fix mingw cross-build of libxml2.

libxml2/libxml2-mingw.patch

---- misc/libxml2-2.7.6/configure	2008-01-11 17:01:56.000000000 +0900
-+++ misc/build/libxml2-2.7.6/configure	2009-09-07 20:48:47.656250000 +0900
-@@ -19914,6 +19914,8 @@
- 
- if test "$with_modules" != "no" ; then
-  case "$host" in
-+  *-*-mingw*)
-+  ;;
-   *-*-cygwin*)
-   MODULE_EXTENSION=".dll"
-   { $as_echo "$as_me:$LINENO: checking for dlopen in -lcygwin" >&5
-@@ -20632,11 +20636,10 @@
- 
-     fi
-     case $host_os in
--       *mingw32*) if test "$THREAD_LIBS" != "-lpthread"; then
-+       *mingw32*)
-                WITH_THREADS="1"
-                THREADS_W32="Win32"
- 	       THREAD_CFLAGS="$THREAD_CFLAGS -DHAVE_WIN32_THREADS"
--           fi
-        ;;
-        *cygwin*) THREAD_LIBS=""
-        ;;
---- misc/libxml2-2.7.6/libxml.h	2007-11-23 19:47:23.000000000 +0900
-+++ misc/build/libxml2-2.7.6/libxml.h	2009-07-10 14:37:34.988250000 +0900
-@@ -30,6 +30,10 @@
- #include <libxml/xmlversion.h>
- #else
- #include "config.h"
-+#ifdef __MINGW32__
-+#undef HAVE_LIBPTHREAD 
-+#undef HAVE_PTHREAD_H 
-+#endif
- #include <libxml/xmlversion.h>
- #endif
- 
---- misc/libxml2-2.7.6/include/libxml/xmlexports.h	2009-09-25 00:31:59.000000000 +0900
-+++ misc/build/libxml2-2.7.6/include/libxml/xmlexports.h	2010-06-06 11:15:54.160750000 +0900
-@@ -113,7 +113,7 @@
-    * _imp__xmlFree listed as missing. Try to workaround the problem
-    * by also making that declaration when compiling client code.
-    */
--  #if !defined(LIBXML_STATIC)
-+  #if defined(IN_LIBXML) && !defined(LIBXML_STATIC)
+--- misc/build/libxml2-2.7.6/include/libxml/xmlexports.h.orig	2011-08-23 10:26:54.000000000 +0200
++++ misc/build/libxml2-2.7.6/include/libxml/xmlexports.h	2011-08-23 10:27:21.000000000 +0200
+@@ -56,7 +56,7 @@
+   #undef XMLPUBVAR
+   #undef XMLCALL
+   #undef XMLCDECL
+-  #if defined(IN_LIBXML) && !defined(LIBXML_STATIC)
++  #if 0
      #define XMLPUBFUN __declspec(dllexport)
      #define XMLPUBVAR __declspec(dllexport)
    #else

libxml2/makefile.mk

@@ -54,7 +54,8 @@ PATCH_FILES=libxml2-configure.patch \
             libxml2-xpath.patch \
             libxml2-global-symbols.patch \
             libxml2-aix.patch \
-            libxml2-vc10.patch
+            libxml2-vc10.patch \
+            libxml2-mingw.patch
 
 .IF "$(OS)" == "WNT"
 PATCH_FILES+= libxml2-long-path.patch
@@ -74,8 +75,19 @@ xml2_LIBS+=$(MINGW_SHARED_LIBSTDCPP)
 .ENDIF
 CONFIGURE_DIR=
 CONFIGURE_ACTION=.$/configure
-CONFIGURE_FLAGS=--enable-ipv6=no --without-python --without-zlib --enable-static=no --without-debug --build=i586-pc-mingw32 --host=i586-pc-mingw32 lt_cv_cc_dll_switch="-shared" CC="$(xml2_CC)" LDFLAGS="-no-undefined -Wl,--enable-runtime-pseudo-reloc-v2 -L$(ILIB:s/;/ -L/)" LIBS="$(xml2_LIBS)" OBJDUMP=objdump
+.IF "$(CROSS_COMPILING)"=="YES"
+BUILD_AND_HOST=--build=$(BUILD_PLATFORM) --host=$(HOST_PLATFORM)
+.ELSE
+BUILD_AND_HOST=--build=i586-pc-mingw32 --host=i586-pc-mingw32
+.ENDIF
+.IF "$(ILIB)" == ""
+CONF_ILIB=
+.ELSE
+CONF_ILIB=-L$(ILIB:s/;/ -L/)
+.ENDIF
+CONFIGURE_FLAGS=--enable-ipv6=no --without-python --without-zlib --enable-static=no --without-debug $(BUILD_AND_HOST) lt_cv_cc_dll_switch="-shared" CC="$(xml2_CC)" LDFLAGS="-Wl,--no-undefined -Wl,--enable-runtime-pseudo-reloc-v2 $(CONF_ILIB)" LIBS="$(xml2_LIBS)" OBJDUMP=objdump
 BUILD_ACTION=$(GNUMAKE)
+BUILD_FLAGS+= -j$(EXTMAXPROCESS)
 BUILD_DIR=$(CONFIGURE_DIR)
 .ELSE
 CONFIGURE_DIR=win32
@@ -129,7 +141,6 @@ OUT2BIN+=xml2-config
 .ELIF "$(OS)"=="WNT"
 .IF "$(COM)"=="GCC"
 OUT2LIB+=.libs$/libxml2*.a
-OUT2BIN+=.libs$/libxml2*.dll
 OUT2BIN+=.libs$/xmllint.exe
 OUT2BIN+=xml2-config
 .ELSE