Fixed building DLL on Windows

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%401620

acinclude.m4

@@ -2614,14 +2614,16 @@ bsdi[[45]]*)
 
 cygwin*)
   # func_win32_libid is a shell function defined in ltmain.sh
-  lt_cv_deplibs_check_method='file_magic ^x86 archive import|^x86 DLL'
+  #lt_cv_deplibs_check_method='file_magic ^x86 archive import|^x86 DLL'
+  lt_cv_deplibs_check_method=pass_all
   lt_cv_file_magic_cmd='func_win32_libid'
   ;;
 
 mingw* | pw32*)
   # Base MSYS/MinGW do not provide the 'file' command needed by
   # func_win32_libid shell function, so use a weaker test based on 'objdump'.
-  lt_cv_deplibs_check_method='file_magic file format pei*-i386(.*architecture: i386)?'
+  #lt_cv_deplibs_check_method='file_magic file format pei*-i386(.*architecture: i386)?'
+  lt_cv_deplibs_check_method=pass_all
   lt_cv_file_magic_cmd='$OBJDUMP -f'
   ;;