[PATCH] Fix GNU nm invocation for AIX

[Richard Sandiford]

AIX nm lists weak defined symbols like any other global symbol,
whereas GNU nm lists them as "W".  The export_symbols_cmds for
GNU nm on AIX should therefore look for "W" in addition to the
other codes.

Tested using GCC.  Please install if OK.

Richard


        * libldtl/m4/libtool.m4 (export_symbols_cmds) Modify the GNU-nm-on-AIX
        version so that it adds weak defined symbols to the export list.

Index: libltdl/m4/libtool.m4
===================================================================
--- libltdl/m4/libtool.m4       2009-03-16 09:24:42.000000000 +0000
+++ libltdl/m4/libtool.m4       2009-03-16 09:30:09.000000000 +0000
@@ -4113,8 +4113,10 @@ m4_if([$1], [CXX], [
   aix[[4-9]]*)
     # If we're using GNU nm, then we don't want the "-C" option.
     # -C means demangle to AIX nm, but means don't demangle with GNU nm
+    # Also, AIX nm treats weak defined symbols like other global defined
+    # symbols, whereas GNU nm marks them as "W".
     if $NM -V 2>&1 | $GREP 'GNU' > /dev/null; then
-      _LT_TAGVAR(export_symbols_cmds, $1)='$NM -Bpg $libobjs $convenience | 
awk '\''{ if (((\$ 2 == "T") || (\$ 2 == "D") || (\$ 2 == "B")) && ([substr](\$ 
3,1,1) != ".")) { print \$ 3 } }'\'' | sort -u > $export_symbols'
+      _LT_TAGVAR(export_symbols_cmds, $1)='$NM -Bpg $libobjs $convenience | 
awk '\''{ if (((\$ 2 == "T") || (\$ 2 == "D") || (\$ 2 == "B") || (\$ 2 == 
"W")) && ([substr](\$ 3,1,1) != ".")) { print \$ 3 } }'\'' | sort -u > 
$export_symbols'
     else
       _LT_TAGVAR(export_symbols_cmds, $1)='$NM -BCpg $libobjs $convenience | 
awk '\''{ if (((\$ 2 == "T") || (\$ 2 == "D") || (\$ 2 == "B")) && ([substr](\$ 
3,1,1) != ".")) { print \$ 3 } }'\'' | sort -u > $export_symbols'
     fi
@@ -4510,8 +4512,10 @@ _LT_EOF
       else
        # If we're using GNU nm, then we don't want the "-C" option.
        # -C means demangle to AIX nm, but means don't demangle with GNU nm
+       # Also, AIX nm treats weak defined symbols like other global
+       # defined symbols, whereas GNU nm marks them as "W".
        if $NM -V 2>&1 | $GREP 'GNU' > /dev/null; then
-         _LT_TAGVAR(export_symbols_cmds, $1)='$NM -Bpg $libobjs $convenience | 
awk '\''{ if (((\$ 2 == "T") || (\$ 2 == "D") || (\$ 2 == "B")) && ([substr](\$ 
3,1,1) != ".")) { print \$ 3 } }'\'' | sort -u > $export_symbols'
+         _LT_TAGVAR(export_symbols_cmds, $1)='$NM -Bpg $libobjs $convenience | 
awk '\''{ if (((\$ 2 == "T") || (\$ 2 == "D") || (\$ 2 == "B") || (\$ 2 == 
"W")) && ([substr](\$ 3,1,1) != ".")) { print \$ 3 } }'\'' | sort -u > 
$export_symbols'
        else
          _LT_TAGVAR(export_symbols_cmds, $1)='$NM -BCpg $libobjs $convenience 
| awk '\''{ if (((\$ 2 == "T") || (\$ 2 == "D") || (\$ 2 == "B")) && 
([substr](\$ 3,1,1) != ".")) { print \$ 3 } }'\'' | sort -u > $export_symbols'
        fi