teach libtool about export_dynamic_flag_spec for ELF-based archs.

devel/libtool/patches/patch-ac

@@ -1,5 +1,5 @@
 --- ltconfig.orig	Sat May 27 07:15:00 2000
-+++ ltconfig	Sat Oct 21 13:46:37 2000
++++ ltconfig	Fri Jan 19 12:57:33 2001
 @@ -1105,6 +1105,9 @@
      with_gnu_ld=no
    fi
@@ -10,7 +10,7 @@
  
  esac
  
-@@ -1402,10 +1405,18 @@
+@@ -1402,10 +1405,21 @@
      ;;
  
    openbsd*)
@@ -19,19 +19,22 @@
      hardcode_direct=yes
      hardcode_shlibpath_var=no
 +    case "$host_os" in
-+      openbsd2.[01234567])
++      openbsd[01].* | openbsd2.[0-7] | openbsd2.[0-7].*)
 +	archive_cmds='$LD -Bshareable -o $lib $libobjs $deplibs $linkopts'
 +	hardcode_libdir_flag_spec='-R$libdir'
 +      ;;
 +      *)
 +	archive_cmds='$CC -shared $pic_flag -o $lib $libobjs $deplibs $linkopts'
 +	hardcode_libdir_flag_spec='${wl}-rpath,$libdir'
++	if [ "`/usr/bin/file /usr/lib/libc.so.* | grep ELF`" != "" ]; then
++	  export_dynamic_flag_spec='${wl}-E'
++	fi
 +      ;;
 +    esac
      ;;
  
    os2*)
-@@ -2021,13 +2032,10 @@
+@@ -2021,13 +2035,10 @@
  
  openbsd*)
    version_type=sunos