[GDBserver] Replicate src dir in build dir

Similar to f38307f5 (Replicate src dir in build dir), this patch change
configure and Makefile to generate object files in arch/ directory.

gdb/gdbserver:

2017-10-17  Yao Qi  <yao.qi@linaro.org>

	* Makefile.in (CONFIG_SRC_SUBDIR): New variable.
	(clean): Remove .o files in CONFIG_SRC_SUBDIR.
	(distclean): Remove DEPDIR in CONFIG_SRC_SUBDIR.
	(arch-i386.o, arch-amd64.o): Remove rules.
	(arch/%.o): New rule.
	Update POSTCOMPILE and COMPILE.pre.
	* configure.ac: Invoke AC_CONFIG_COMMANDS.
	* configure: Re-generated.
	* configure.srv: Replace arch-i386.o with arch/i386.o.
	Replace arch-amd64.o with arch/amd64.o.

gdb/gdbserver/ChangeLog

@@ -1,3 +1,16 @@
+2017-10-17  Yao Qi  <yao.qi@linaro.org>
+
+	* Makefile.in (CONFIG_SRC_SUBDIR): New variable.
+	(clean): Remove .o files in CONFIG_SRC_SUBDIR.
+	(distclean): Remove DEPDIR in CONFIG_SRC_SUBDIR.
+	(arch-i386.o, arch-amd64.o): Remove rules.
+	(arch/%.o): New rule.
+	Update POSTCOMPILE and COMPILE.pre.
+	* configure.ac: Invoke AC_CONFIG_COMMANDS.
+	* configure: Re-generated.
+	* configure.srv: Replace arch-i386.o with arch/i386.o.
+	Replace arch-amd64.o with arch/amd64.o.
+
 2017-10-16  Yao Qi  <yao.qi@linaro.org>
 
 	* configure: Regenerated.

gdb/gdbserver/Makefile.in

@@ -43,6 +43,7 @@ man9dir = $(mandir)/man9
 infodir = @infodir@
 htmldir = $(prefix)/html
 includedir = @includedir@
+CONFIG_SRC_SUBDIR = @CONFIG_SRC_SUBDIR@
 
 SHELL = @SHELL@
 EXEEXT = @EXEEXT@
@@ -434,6 +435,10 @@ clean:
 	rm -f *-generated.c
 	rm -f stamp-xml
 	rm -f $(DEPDIR)/*.Po
+	for i in $(CONFIG_SRC_SUBDIR); do \
+		rm -f $$i/*.o;	\
+		rm -f $$i/$(DEPDIR)/*; \
+	done
 	@$(MAKE) $(FLAGS_TO_PASS) DO=$@ "DODIRS=$(SUBDIRS)" subdir_do
 
 maintainer-clean realclean distclean: clean
@@ -441,6 +446,9 @@ maintainer-clean realclean distclean: clean
 	rm -rf $(GNULIB_BUILDDIR)
 	rm -f Makefile config.status config.h stamp-h config.log
 	rm -f Makefile
+	for i in $(CONFIG_SRC_SUBDIR); do \
+		rmdir $$i/$(DEPDIR); \
+	done
 
 subdir_do: force
 	@for i in $(DODIRS); do \
@@ -530,11 +538,7 @@ ax.o: ax.c
 	$(COMPILE) $(WARN_CFLAGS_NO_FORMAT) $<
 	$(POSTCOMPILE)
 
-arch-i386.o: ../arch/i386.c
+arch/%.o: ../arch/%.c
-	$(COMPILE) $<
-	$(POSTCOMPILE)
-
-arch-amd64.o: ../arch/amd64.c
 	$(COMPILE) $<
 	$(POSTCOMPILE)
 
@@ -617,12 +621,13 @@ ifeq ($(DEPMODE),depmode=gcc3)
 # into place if the compile succeeds.  We need this because gcc does
 # not atomically write the dependency output file.
 override COMPILE.post = -c -o $@ -MT $@ -MMD -MP \
-	-MF $(DEPDIR)/$(basename $(@F)).Tpo
+	-MF $(@D)/$(DEPDIR)/$(basename $(@F)).Tpo
-override POSTCOMPILE = @mv $(DEPDIR)/$(basename $(@F)).Tpo \
+override POSTCOMPILE = @mv $(@D)/$(DEPDIR)/$(basename $(@F)).Tpo \
-	$(DEPDIR)/$(basename $(@F)).Po
+	$(@D)/$(DEPDIR)/$(basename $(@F)).Po
 else
 override COMPILE.pre = source='$<' object='$@' libtool=no \
-	DEPDIR=$(DEPDIR) $(DEPMODE) $(depcomp) $(CC)
+	DEPDIR=$(DEPDIR) $(DEPMODE) $(depcomp) \
+	$(CXX) -x c++ $(CXX_DIALECT)
 # depcomp handles atomicity for us, so we don't need a postcompile
 # step.
 override POSTCOMPILE =

gdb/gdbserver/configure

@@ -607,6 +607,7 @@ ustinc
 ustlibs
 ALLOCA
 CCDEPMODE
+CONFIG_SRC_SUBDIR
 DEPDIR
 am__leading_dot
 host_noncanonical
@@ -5854,6 +5855,14 @@ DEPDIR="${am__leading_dot}deps"
 ac_config_commands="$ac_config_commands depdir"
 
 
+
+# Create sub-directories for objects and dependencies.
+CONFIG_SRC_SUBDIR="arch"
+
+
+ac_config_commands="$ac_config_commands gdbdepdir"
+
+
 depcc="$CC"   am_compiler_list=
 
 am_depcomp=$ac_aux_dir/depcomp
@@ -9144,6 +9153,7 @@ cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 # INIT-COMMANDS
 #
 ac_aux_dir=$ac_aux_dir DEPDIR=$DEPDIR
+ac_aux_dir=$ac_aux_dir DEPDIR=$DEPDIR CONFIG_SRC_SUBDIR="$CONFIG_SRC_SUBDIR"
 
 _ACEOF
 
@@ -9155,6 +9165,7 @@ do
   case $ac_config_target in
     "config.h") CONFIG_HEADERS="$CONFIG_HEADERS config.h:config.in" ;;
     "depdir") CONFIG_COMMANDS="$CONFIG_COMMANDS depdir" ;;
+    "gdbdepdir") CONFIG_COMMANDS="$CONFIG_COMMANDS gdbdepdir" ;;
     "Makefile") CONFIG_FILES="$CONFIG_FILES Makefile" ;;
 
   *) as_fn_error "invalid argument: \`$ac_config_target'" "$LINENO" 5;;
@@ -9701,6 +9712,11 @@ $as_echo "$as_me: executing $ac_file commands" >&6;}
 
   case $ac_file$ac_mode in
     "depdir":C) $SHELL $ac_aux_dir/mkinstalldirs $DEPDIR ;;
+    "gdbdepdir":C)
+  for subdir in ${CONFIG_SRC_SUBDIR}
+  do
+      $SHELL $ac_aux_dir/mkinstalldirs $subdir/$DEPDIR
+  done ;;
     "Makefile":F) case x$CONFIG_HEADERS in
 xconfig.h:config.in)
 echo > stamp-h ;;

gdb/gdbserver/configure.ac

@@ -66,6 +66,18 @@ ACX_NONCANONICAL_HOST
 
 # Dependency checking.
 ZW_CREATE_DEPDIR
+
+# Create sub-directories for objects and dependencies.
+CONFIG_SRC_SUBDIR="arch"
+AC_SUBST(CONFIG_SRC_SUBDIR)
+
+AC_CONFIG_COMMANDS([gdbdepdir],[
+  for subdir in ${CONFIG_SRC_SUBDIR}
+  do
+      $SHELL $ac_aux_dir/mkinstalldirs $subdir/$DEPDIR
+  done],
+  [ac_aux_dir=$ac_aux_dir DEPDIR=$DEPDIR CONFIG_SRC_SUBDIR="$CONFIG_SRC_SUBDIR"])
+
 ZW_PROG_COMPILER_DEPENDENCIES([CC])
 
 gnulib_extra_configure_args=

gdb/gdbserver/configure.srv

@@ -113,7 +113,7 @@ case "${target}" in
 			;;
   i[34567]86-*-cygwin*)	srv_regobj=""
 			srv_tgtobj="x86-low.o x86-dregs.o win32-low.o win32-i386-low.o"
-			srv_tgtobj="${srv_tgtobj} arch-i386.o"
+			srv_tgtobj="${srv_tgtobj} arch/i386.o"
 			srv_xmlfiles="$srv_i386_xmlfiles"
 			;;
   i[34567]86-*-linux*)	srv_regobj="$srv_i386_linux_regobj"
@@ -123,7 +123,7 @@ case "${target}" in
 			    srv_xmlfiles="${srv_xmlfiles} $srv_amd64_linux_xmlfiles"
 			    srv_tgtobj="amd64-linux-siginfo.o"
 			fi
-			srv_tgtobj="${srv_tgtobj} arch-i386.o"
+			srv_tgtobj="${srv_tgtobj} arch/i386.o"
 			srv_tgtobj="${srv_tgtobj} $srv_linux_obj linux-x86-low.o x86-low.o x86-dregs.o i387-fp.o"
 			srv_tgtobj="${srv_tgtobj} linux-x86-tdesc.o"
 			srv_tgtobj="${srv_tgtobj} linux-btrace.o x86-linux.o"
@@ -137,7 +137,7 @@ case "${target}" in
 			;;
   i[34567]86-*-lynxos*)	srv_regobj=""
 			srv_tgtobj="lynx-low.o lynx-i386-low.o fork-child.o fork-inferior.o"
-			srv_tgtobj="${srv_tgtobj} arch-i386.o"
+			srv_tgtobj="${srv_tgtobj} arch/i386.o"
 			srv_xmlfiles="i386/i386.xml"
 			srv_xmlfiles="${srv_xmlfiles} i386/32bit-core.xml"
 			srv_xmlfiles="${srv_xmlfiles} i386/32bit-sse.xml"
@@ -146,7 +146,7 @@ case "${target}" in
   i[34567]86-*-mingw32ce*)
 			srv_regobj=""
 			srv_tgtobj="x86-low.o x86-dregs.o win32-low.o win32-i386-low.o"
-			srv_tgtobj="${srv_tgtobj} arch-i386.o"
+			srv_tgtobj="${srv_tgtobj} arch/i386.o"
 			srv_tgtobj="${srv_tgtobj} wincecompat.o"
 			srv_xmlfiles="$srv_i386_xmlfiles"
 			# hostio_last_error implementation is in win32-low.c
@@ -156,12 +156,12 @@ case "${target}" in
 			;;
   i[34567]86-*-mingw*)	srv_regobj=""
 			srv_tgtobj="x86-low.o x86-dregs.o win32-low.o win32-i386-low.o"
-			srv_tgtobj="${srv_tgtobj} arch-i386.o"
+			srv_tgtobj="${srv_tgtobj} arch/i386.o"
 			srv_xmlfiles="$srv_i386_xmlfiles"
 			srv_mingw=yes
 			;;
   i[34567]86-*-nto*)	srv_regobj=""
-			srv_tgtobj="nto-low.o nto-x86-low.o arch-i386.o"
+			srv_tgtobj="nto-low.o nto-x86-low.o arch/i386.o"
 			srv_xmlfiles="$srv_i386_xmlfiles"
 			srv_qnx="yes"
 			;;
@@ -372,7 +372,7 @@ case "${target}" in
 			;;
   x86_64-*-linux*)	srv_regobj="$srv_amd64_linux_regobj $srv_i386_linux_regobj"
 			srv_tgtobj="$srv_linux_obj linux-x86-low.o x86-low.o x86-dregs.o i387-fp.o"
-			srv_tgtobj="${srv_tgtobj} arch-i386.o arch-amd64.o"
+			srv_tgtobj="${srv_tgtobj} arch/i386.o arch/amd64.o"
 			srv_tgtobj="${srv_tgtobj} linux-x86-tdesc.o"
 			srv_tgtobj="${srv_tgtobj} linux-btrace.o x86-linux.o"
 			srv_tgtobj="${srv_tgtobj} x86-linux-dregs.o"
@@ -387,13 +387,13 @@ case "${target}" in
 			;;
   x86_64-*-mingw*)	srv_regobj=""
 			srv_tgtobj="x86-low.o x86-dregs.o i387-fp.o win32-low.o win32-i386-low.o"
-			srv_tgtobj="${srv_tgtobj} arch-amd64.o"
+			srv_tgtobj="${srv_tgtobj} arch/amd64.o"
 			srv_xmlfiles="$srv_i386_xmlfiles $srv_amd64_xmlfiles"
 			srv_mingw=yes
 			;;
   x86_64-*-cygwin*)	srv_regobj=""
 			srv_tgtobj="x86-low.o x86-dregs.o i387-fp.o win32-low.o win32-i386-low.o"
-			srv_tgtobj="${srv_tgtobj} arch-amd64.o"
+			srv_tgtobj="${srv_tgtobj} arch/amd64.o"
 			srv_xmlfiles="$srv_i386_xmlfiles"
 			;;