[PATCH RFC] AIX thread support configury changes

The patch below enables AIX thread support provided by aix-thread.c. 
I'll wait a few days for objections before committing it.

        * Makefile.in (rs6000-nat.o): Update dependencies.

        From Nicholas Duffek:
        * Makefile.in (ALLDEPFILES): Add aix-thread.c.
        (aix-thread.o): New rule.
        * configure.host (gdb_host): Set to aix432 on AIX 4.3.2+.
        * config/powerpc/aix432.mh: New file.

Index: Makefile.in
===================================================================
RCS file: /cvs/src/src/gdb/Makefile.in,v
retrieving revision 1.223
diff -u -p -r1.223 Makefile.in
--- Makefile.in 24 Jul 2002 23:51:35 -0000      1.223
+++ Makefile.in 27 Jul 2002 00:13:00 -0000
@@ -1200,6 +1200,7 @@ MAKEOVERRIDES=
 unexport CHILLFLAGS CHILL_LIB CHILL_FOR_TARGET :
 
 ALLDEPFILES = a68v-nat.c \
+       aix-thread.c \
        alpha-nat.c alphabsd-nat.c \
        alpha-tdep.c alpha-linux-tdep.c alphabsd-tdep.c alphanbsd-tdep.c \
        alpha-osf1-tdep.c alphafbsd-tdep.c \
@@ -1259,6 +1260,10 @@ ALLDEPFILES = a68v-nat.c \
 a68v-nat.o: a68v-nat.c $(defs_h) $(gdbcore_h) $(inferior_h) \
        $(regcache_h)
 
+aix-thread.o: aix-thread.c $(defs_h) $(gdbcore_h) $(gdbthread_h) \
+       $(inferior_h) $(target_h) $(regcache_h) $(gdbcmd_h) $(gdb_assert_h) \
+       $(ppc_tdep_h) $(language_h)
+
 alpha-nat.o: alpha-nat.c $(defs_h) $(gdbcore_h) $(inferior_h) $(target_h) \
        $(regcache_h) $(alpha_tdep_h)
 
@@ -2043,7 +2048,8 @@ rom68k-rom.o: rom68k-rom.c $(monitor_h) 
 
 rs6000-nat.o: rs6000-nat.c $(bfd_h) $(defs_h) $(inferior_h) $(target_h) \
        $(gdbcore_h) $(xcoffsolib_h) $(symfile_h) $(objfiles_h) \
-       $(gdb_stabs_h) $(regcache_h) $(arch_utils_h)
+       $(gdb_stabs_h) $(regcache_h) $(arch_utils_h) $(language_h) \
+       $(ppc_tdep_h)
 
 rs6000-tdep.o: rs6000-tdep.c $(defs_h) $(gdbcore_h) $(inferior_h) \
        $(target_h) $(ppc_tdep_h) $(regcache_h) $(value_h) $(parser_defs_h)
Index: configure.host
===================================================================
RCS file: /cvs/src/src/gdb/configure.host,v
retrieving revision 1.40
diff -u -p -r1.40 configure.host
--- configure.host      24 Jul 2002 23:51:35 -0000      1.40
+++ configure.host      27 Jul 2002 00:13:02 -0000
@@ -129,7 +129,10 @@ none-*-*)          gdb_host=none ;;
 
 ns32k-*-netbsd*)       gdb_host=nbsdaout ;;
 
-powerpc-*-aix*)                gdb_host=aix ;;
+powerpc-*-aix3*)       gdb_host=aix ;;
+powerpc-*-aix4.[0-2]*) gdb_host=aix ;;
+powerpc-*-aix4.3.[0-1]*)       gdb_host=aix ;;
+powerpc-*-aix*)                gdb_host=aix432 ;;
 powerpc-*-linux*)      gdb_host=linux ;;
 powerpc-*-netbsd*)     gdb_host=nbsd ;;
 
Index: config/powerpc/aix432.mh
===================================================================
RCS file: config/powerpc/aix432.mh
diff -N config/powerpc/aix432.mh
--- /dev/null   1 Jan 1970 00:00:00 -0000
+++ config/powerpc/aix432.mh    27 Jul 2002 00:13:03 -0000
@@ -0,0 +1,19 @@
+# Host: IBM PowerPC running AIX 4.3.2+
+
+XM_FILE= xm-aix.h
+
+NAT_FILE= nm-aix.h
+NATDEPFILES= aix-thread.o fork-child.o infptrace.o inftarg.o corelow.o \
+            rs6000-nat.o xcoffread.o xcoffsolib.o
+
+# When compiled with cc, for debugging, this argument should be passed.
+# We have no idea who our current compiler is though, so we skip it.
+# MH_CFLAGS = -bnodelcsect
+
+# gdb is too big for all of its external symbols to fit in a small TOC
+# It looks like the GNU linker doesn't understand the -bbigtoc switch.
+# This switch may be needed for some vendor compilers.
+# MH_LDFLAGS = -Wl,-bbigtoc
+
+# pthread debugging support
+NAT_CLIBS = -lpthdebug