Add hack to have different names for 64 bit Windows DLLs.

* ltmain.sh: Prefix the SO number for W64 with a "6".
--

We need to stick to libtool 2.4.2 anyway, thus we take the easy way
and hack libtool instead of adding "-release 6" to the Makefile.  This
also avoids an extra dash before the 6 and thus yields a prettier name
than the one produced by the -release option.  The header files and
def files are supposed to be identical for w32 and w64 thus we don't
need to do any special code for them.

Having a different namespace for 64 bit DLLs is such a good idea that
I hope this or a similar feature will be provided by future libtool
versions.

1 files changed, 13 insertions, 0 deletions

diff --git a/ltmain.sh b/ltmain.sh
index 6f650ae..d47c0ba 100755
--- a/ltmain.sh
+++ b/ltmain.sh
@@ -6748,6 +6748,11 @@ func_mode_link ()
 	    elif test -n "$soname_spec"; then
 	      # bleh windows
 	      case $host in
+              x86_64-*mingw32*)
+                func_arith $current - $age
+		major=$func_arith_result
+		versuffix="6-$major"
+		;;
 	      *cygwin* | mingw* | *cegcc*)
 	        func_arith $current - $age
 		major=$func_arith_result
@@ -7480,6 +7485,14 @@ func_mode_link ()
 	  func_arith $current - $age
 	  major=$func_arith_result
 	  versuffix="-$major"
+          case $host in
+          x86_64-*mingw32*)
+             versuffix="6-$major"
+             ;;
+          *)
+             versuffix="-$major"
+             ;;
+          esac
 	  ;;
 
 	*)