RFC: automatic dependency tracking for gdbserver

[Tom Tromey <tromey@redhat.com>]

This patch applies the same automatic dependency tracking logic that gdb
uses to gdbserver.

The downside of this patch is that gdbserver dependencies will not be
tracked unless the developer is using GNU make.  On the other hand,
we've had this same code in gdb for several years without any
complaints.

Comments?

Tom


2012-12-03  Tom Tromey  <tromey@redhat.com>

	* Makefile.in (DEPMODE, DEPDIR, depcomp, COMPILE.pre)
	(COMPILE.post, COMPILE, POSTCOMPILE, IPAGENT_COMPILE): New
	macros.
	(.c.o): Rewrite.
	(ax-ipa.o, tracepoint-ipa.o, utils-ipa.o, format-ipa.o)
	(common-utils-ipa.o, remote-utils-ipa.o, regcache-ipa.o)
	(i386-linux-ipa.o, linux-i386-ipa.o, linux-amd64-ipa.o)
	(amd64-linux-ipa.o, ax.o): Rewrite.
	(event-loop.o, hostio.o, hostio-errno.o, inferiors.o, mem-break.o)
	(proc-service.o, regcache.o, remote-utils.o, server.o, target.o)
	(thread-db.o, tracepoint.o, utils.o, gdbreplay.o, dll.o): Remove.
	(signals.o, linux-procfs.o, linux-ptrace.o, common-utils.o, vec.o)
	(gdb_vecs.o, xml-utils.o, linux-osdata.o, ptid.o, buffer.o)
	(format.o, agent.o, vasprintf.o, vsnprintf.o): Rewrite.
	(i386-low.o, i387-fp.o, linux-low.o, linux-arm-low.o)
	(linux-bfin-low.o, linux-cris-low.o, linux-crisv32-low.o)
	(linux-ia64-low.o, linux-m32r-low.o, linux-mips-low.o)
	(linux-ppc-low.o, linux-s390-low.o, linux-sh-low.o)
	(linux-tic6x-low.o, linux-x86-low.o, linux-xtensa-low.o)
	(linux-tile-low.o, lynx-low.o, lynx-ppc-low.o, nto-low.o)
	(nto-x86-low.o, linux-low.o, win32-low.o, win32-arm-low.o)
	(win32-i386-low.o, spu-low.o, reg-arm.o, arm-with-iwmmxt.o)
	(arm-with-vfpv2.o, arm-with-vfpv3.o, arm-with-neon.o, reg-bfin.o)
	(reg-cris.o, reg-crisv32.o, i386.o, i386-linux.o, i386-avx.o)
	(i386-avx-linux.o, i386-mmx.o, i386-mmx-linux.o, reg-ia64.o)
	(reg-m32r.o, reg-m68k.o, reg-cf.o, mips-linux.o, mips-dsp-linux.o)
	(mips64-linux.o, mips64-dsp-linux.o, powerpc-32.o, powerpc-32l.o)
	(powerpc-altivec32l.o, powerpc-cell32l.o, powerpc-vsx32l.o)
	(powerpc-isa205-32l.o, powerpc-isa205-altivec32l.o)
	(powerpc-isa205-vsx32l.o, powerpc-e500l.o, powerpc-64l.o)
	(powerpc-altivec64l.o, powerpc-cell64l.o, powerpc-vsx64l.o)
	(powerpc-isa205-64l.o, powerpc-isa205-altivec64l.o)
	(powerpc-isa205-vsx64l.o, s390-linux32.o, s390-linux32v1.o)
	(s390-linux32v2.o, s390-linux64.o, s390-linux64v1.o)
	(s390-linux64v2.o, s390x-linux64.o, s390x-linux64v1.o)
	(s390x-linux64v2.o, tic6x-c64xp-linux.o, tic6x-c64x-linux.o)
	(tic6x-c62x-linux.o, reg-sh.o, reg-sparc64.o, reg-spu.o, amd64.o)
	(amd64-linux.o, amd64-avx.o, amd64-avx-linux.o, x32.o)
	(x32-linux.o, x32-avx.o, x32-avx-linux.o, reg-xtensa.o)
	(reg-tilegx.o): Remove.
	(all_object_files): New macro.
	Include .deps files.
	* aclocal.m4, configure: Rebuild.
	* configure.ac: Invoke ZW_CREATE_DEPDIR,
	ZW_PROG_COMPILER_DEPENDENCIES.  Compute GMAKE condition.

diff --git a/gdb/gdbserver/Makefile.in b/gdb/gdbserver/Makefile.in
index fc4fd1d..872202e 100644
--- a/gdb/gdbserver/Makefile.in
+++ b/gdb/gdbserver/Makefile.in
@@ -51,6 +51,18 @@ RANLIB = @RANLIB@
 
 CC = @CC@
 
+# Dependency tracking information.
+DEPMODE = @CCDEPMODE@
+DEPDIR = @DEPDIR@
+depcomp = $(SHELL) $(srcdir)/../depcomp
+
+# Note that these are overridden by GNU make-specific code below if
+# GNU make is used.  The overrides implement dependency tracking.
+COMPILE.pre = $(CC)
+COMPILE.post = -c -o $@
+COMPILE = $(COMPILE.pre) $(INTERNAL_CFLAGS) $(COMPILE.post)
+POSTCOMPILE = @true
+
 # Directory containing source files.  Don't clean up the spacing,
 # this exact string is matched for by the "configure" script.
 srcdir = @srcdir@
@@ -216,10 +228,9 @@ FLAGS_TO_PASS = \
 # All generated files which can be included by another file.
 generated_files = config.h $(GNULIB_H)
 
-# Prevent Sun make from putting in the machine type.  Setting
-# TARGET_ARCH to nothing works for SunOS 3, 4.0, but not for 4.1.
 .c.o:
-	${CC} -c ${INTERNAL_CFLAGS} $<
+	$(COMPILE) $<
+	$(POSTCOMPILE)
 
 all: gdbserver$(EXEEXT) gdbreplay$(EXEEXT) $(extra_libraries)
 	@$(MAKE) $(FLAGS_TO_PASS) DO=$@ "DODIRS=$(SUBDIRS)" subdir_do
@@ -453,325 +464,268 @@ IPAGENT_CFLAGS = $(CPPFLAGS) $(INTERNAL_CFLAGS) $(UST_CFLAGS) \
 	-fPIC -DIN_PROCESS_AGENT \
 	-fvisibility=hidden
 
+IPAGENT_COMPILE = $(COMPILE.pre) $(IPAGENT_CFLAGS) $(COMPILE.post)
+
 # In-process agent object rules
-ax-ipa.o: ax.c $(server_h) $(ax_h) $(srcdir)/../common/ax.def
-	$(CC) -c $(IPAGENT_CFLAGS) $(WARN_CFLAGS_NO_FORMAT) $< -o ax-ipa.o
-tracepoint-ipa.o: tracepoint.c $(server_h) ${ax_h}
-	$(CC) -c $(IPAGENT_CFLAGS) $< -o tracepoint-ipa.o
-utils-ipa.o: utils.c $(server_h)
-	$(CC) -c $(IPAGENT_CFLAGS) $< -o utils-ipa.o
-format-ipa.o: ../common/format.c $(server_h) ${ax_h}
-	$(CC) -c $(IPAGENT_CFLAGS) $< -o format-ipa.o
-common-utils-ipa.o: ../common/common-utils.c $(server_h)
-	$(CC) -c $(IPAGENT_CFLAGS) $< -o common-utils-ipa.o
-remote-utils-ipa.o: remote-utils.c $(server_h)
-	$(CC) -c $(IPAGENT_CFLAGS) $< -o remote-utils-ipa.o
-regcache-ipa.o: regcache.c $(server_h)
-	$(CC) -c $(IPAGENT_CFLAGS) $< -o regcache-ipa.o
-i386-linux-ipa.o : i386-linux.c $(regdef_h)
-	$(CC) -c $(IPAGENT_CFLAGS) $< -o i386-linux-ipa.o
-linux-i386-ipa.o: linux-i386-ipa.c $(server_h)
-	$(CC) -c $(IPAGENT_CFLAGS) $< -o linux-i386-ipa.o
-linux-amd64-ipa.o: linux-amd64-ipa.c $(server_h)
-	$(CC) -c $(IPAGENT_CFLAGS) $< -o linux-amd64-ipa.o
-amd64-linux-ipa.o : amd64-linux.c $(regdef_h)
-	$(CC) -c $(IPAGENT_CFLAGS) $< -o amd64-linux-ipa.o
-
-ax.o: ax.c $(server_h) $(ax_h) $(srcdir)/../common/ax.def
-	$(CC) -c $(CPPFLAGS) $(INTERNAL_CFLAGS) $(WARN_CFLAGS_NO_FORMAT) $<
-event-loop.o: event-loop.c $(server_h)
-hostio.o: hostio.c $(server_h)
-hostio-errno.o: hostio-errno.c $(server_h)
-inferiors.o: inferiors.c $(server_h) $(gdbthread_h)
-mem-break.o: mem-break.c $(server_h) $(ax_h)
-proc-service.o: proc-service.c $(server_h) $(gdb_proc_service_h)
-regcache.o: regcache.c $(server_h) $(regdef_h) $(gdbthread_h)
-remote-utils.o: remote-utils.c terminal.h $(server_h) $(gdbthread_h)
-server.o: server.c $(server_h) $(agent_h) $(gdbthread_h)
-target.o: target.c $(server_h) 
-thread-db.o: thread-db.c $(server_h) $(linux_low_h) $(gdb_proc_service_h) \
-	$(gdb_thread_db_h) $(gdb_vecs_h)
-tracepoint.o: tracepoint.c $(server_h) $(ax_h) $(agent_h) $(gdbthread_h)
-utils.o: utils.c $(server_h)
-gdbreplay.o: gdbreplay.c config.h
-dll.o: dll.c $(server_h)
-
-signals.o: ../common/signals.c $(server_h) $(signals_def)
-	$(CC) -c $(CPPFLAGS) $(INTERNAL_CFLAGS) $<
-
-linux-procfs.o: ../common/linux-procfs.c $(server_h)
-	$(CC) -c $(CPPFLAGS) $(INTERNAL_CFLAGS) $<
-
-linux-ptrace.o: ../common/linux-ptrace.c $(server_h)
-	$(CC) -c $(CPPFLAGS) $(INTERNAL_CFLAGS) $<
-
-common-utils.o: ../common/common-utils.c $(server_h)
-	$(CC) -c $(CPPFLAGS) $(INTERNAL_CFLAGS) $<
-
-vec.o: ../common/vec.c $(vec_h)
-	$(CC) -c $(CPPFLAGS) $(INTERNAL_CFLAGS) $<
-
-gdb_vecs.o: ../common/gdb_vecs.c $(vec_h) $(gdb_vecs_h) $(host_defs_h)
-	$(CC) -c $(CPPFLAGS) $(INTERNAL_CFLAGS) $<
-
-xml-utils.o: ../common/xml-utils.c $(server_h)
-	$(CC) -c $(CPPFLAGS) $(INTERNAL_CFLAGS) $<
-
-linux-osdata.o: ../common/linux-osdata.c $(server_h) $(linux_osdata_h) ../common/gdb_dirent.h
-	$(CC) -c $(CPPFLAGS) $(INTERNAL_CFLAGS) $<
-
-ptid.o: ../common/ptid.c $(ptid_h)
-	$(CC) -c $(CPPFLAGS) $(INTERNAL_CFLAGS) $<
-
-buffer.o: ../common/buffer.c $(server_h)
-	$(CC) -c $(CPPFLAGS) $(INTERNAL_CFLAGS) $<
-
-format.o: ../common/format.c $(server_h)
-	$(CC) -c $(CPPFLAGS) $(INTERNAL_CFLAGS) $<
-
-agent.o: ../common/agent.c $(server_h) $(agent_h)
-	$(CC) -c $(CPPFLAGS) $(INTERNAL_CFLAGS) $<
+ax-ipa.o: ax.c
+	$(IPAGENT_COMPILE) $(WARN_CFLAGS_NO_FORMAT) $<
+	$(POSTCOMPILE)
+tracepoint-ipa.o: tracepoint.c
+	$(IPAGENT_COMPILE) $<
+	$(POSTCOMPILE)
+utils-ipa.o: utils.c
+	$(IPAGENT_COMPILE) $<
+	$(POSTCOMPILE)
+format-ipa.o: ../common/format.c
+	$(IPAGENT_COMPILE) $<
+	$(POSTCOMPILE)
+common-utils-ipa.o: ../common/common-utils.c
+	$(IPAGENT_COMPILE) $<
+	$(POSTCOMPILE)
+remote-utils-ipa.o: remote-utils.c
+	$(IPAGENT_COMPILE) $<
+	$(POSTCOMPILE)
+regcache-ipa.o: regcache.c
+	$(IPAGENT_COMPILE) $<
+	$(POSTCOMPILE)
+i386-linux-ipa.o : i386-linux.c
+	$(IPAGENT_COMPILE) $<
+	$(POSTCOMPILE)
+linux-i386-ipa.o: linux-i386-ipa.c
+	$(IPAGENT_COMPILE) $<
+	$(POSTCOMPILE)
+linux-amd64-ipa.o: linux-amd64-ipa.c
+	$(IPAGENT_COMPILE) $<
+	$(POSTCOMPILE)
+amd64-linux-ipa.o : amd64-linux.c
+	$(IPAGENT_COMPILE) $<
+	$(POSTCOMPILE)
+
+ax.o: ax.c
+	$(COMPILE) $(WARN_CFLAGS_NO_FORMAT) $<
+	$(POSTCOMPILE)
+
+signals.o: ../common/signals.c
+	$(COMPILE) $<
+	$(POSTCOMPILE)
+linux-procfs.o: ../common/linux-procfs.c
+	$(COMPILE) $<
+	$(POSTCOMPILE)
+linux-ptrace.o: ../common/linux-ptrace.c
+	$(COMPILE) $<
+	$(POSTCOMPILE)
+common-utils.o: ../common/common-utils.c
+	$(COMPILE) $<
+	$(POSTCOMPILE)
+vec.o: ../common/vec.c
+	$(COMPILE) $<
+	$(POSTCOMPILE)
+gdb_vecs.o: ../common/gdb_vecs.c
+	$(COMPILE) $<
+	$(POSTCOMPILE)
+xml-utils.o: ../common/xml-utils.c
+	$(COMPILE) $<
+	$(POSTCOMPILE)
+linux-osdata.o: ../common/linux-osdata.c
+	$(COMPILE) $<
+	$(POSTCOMPILE)
+ptid.o: ../common/ptid.c
+	$(COMPILE) $<
+	$(POSTCOMPILE)
+buffer.o: ../common/buffer.c
+	$(COMPILE) $<
+	$(POSTCOMPILE)
+format.o: ../common/format.c
+	$(COMPILE) $<
+	$(POSTCOMPILE)
+agent.o: ../common/agent.c
+	$(COMPILE) $<
+	$(POSTCOMPILE)
 
 # We build vasprintf with -DHAVE_CONFIG_H because we want that unit to
 # include our config.h file.  Otherwise, some system headers do not get
 # included, and the compiler emits a warning about implicitly defined
 # functions (missing declaration).
 vasprintf.o: $(srcdir)/../../libiberty/vasprintf.c
-	$(CC) -o vasprintf.o -c $(CPPFLAGS) $(INTERNAL_CFLAGS) -DHAVE_CONFIG_H $<
+	$(COMPILE) $< -DHAVE_CONFIG_H
+	$(POSTCOMPILE)
 vsnprintf.o: $(srcdir)/../../libiberty/vsnprintf.c
-	$(CC) -o vsnprintf.o -c $(CPPFLAGS) $(INTERNAL_CFLAGS) $<
+	$(COMPILE) $<
+	$(POSTCOMPILE)
 
 i386_low_h = $(srcdir)/i386-low.h
 
-i386-low.o: i386-low.c $(i386_low_h) $(server_h) $(target_h)
-
-i387-fp.o: i387-fp.c $(server_h)
-
-linux-low.o: linux-low.c $(linux_low_h) $(linux_ptrace_h) $(linux_procfs_h) \
-	$(server_h) $(linux_osdata_h) $(agent_h)
-	$(CC) -c $(CPPFLAGS) $(INTERNAL_CFLAGS) $< @USE_THREAD_DB@
-
-linux-arm-low.o: linux-arm-low.c $(linux_low_h) $(server_h) \
-	$(gdb_proc_service_h)
-linux-bfin-low.o: linux-bfin-low.c $(linux_low_h) $(server_h) $(libiberty_h)
-linux-cris-low.o: linux-cris-low.c $(linux_low_h) $(server_h)
-linux-crisv32-low.o: linux-crisv32-low.c $(linux_low_h) $(server_h)
-linux-ia64-low.o: linux-ia64-low.c $(linux_low_h) $(server_h)
-linux-m32r-low.o: linux-m32r-low.c $(linux_low_h) $(server_h)
-linux-mips-low.o: linux-mips-low.c $(linux_low_h) $(server_h) \
-	$(gdb_proc_service_h)
-linux-ppc-low.o: linux-ppc-low.c $(linux_low_h) $(server_h)
-linux-s390-low.o: linux-s390-low.c $(linux_low_h) $(server_h)
-linux-sh-low.o: linux-sh-low.c $(linux_low_h) $(server_h)
-linux-tic6x-low.o: linux-tic6x-low.c $(linux_low_h) $(server_h)
-linux-x86-low.o: linux-x86-low.c $(linux_low_h) $(server_h) \
-	$(gdb_proc_service_h) $(i386_low_h) $(agent_h)
-linux-xtensa-low.o: linux-xtensa-low.c xtensa-xtregs.c $(linux_low_h) $(server_h)
-linux-tile-low.o: linux-tile-low.c $(linux_low_h) $(server_h)
-
-lynx-low.o: lynx-low.c $(server_h) $(target_h) $(lynx_low_h)
-lynx-ppc-low.o: lynx-ppc-low.c $(server_h) $(lynx_low_h)
-nto-low.o: nto-low.c $(server_h) $(nto_low_h) $(gdbthread_h)
-nto-x86-low.o: nto-x86-low.c $(server_h) $(nto_low_h) $(regdef_h) $(regcache_h)
+linux-low.o: linux-low.c
+	$(COMPILE) $< @USE_THREAD_DB@
+	$(POSTCOMPILE)
 
 win32_low_h = $(srcdir)/win32-low.h
 
-win32-low.o: win32-low.c $(win32_low_h) $(server_h) $(regdef_h) $(regcache_h) $(gdbthread_h)
-
-win32-arm-low.o: win32-arm-low.c $(win32_low_h) $(server_h)
-win32-i386-low.o: win32-i386-low.c $(win32_low_h) $(server_h) $(i386_low_h)
-
-spu-low.o: spu-low.c $(server_h)
-
-reg-arm.o : reg-arm.c $(regdef_h)
 reg-arm.c : $(srcdir)/../regformats/reg-arm.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/reg-arm.dat reg-arm.c
-arm-with-iwmmxt.o : arm-with-iwmmxt.c $(regdef_h)
 arm-with-iwmmxt.c : $(srcdir)/../regformats/arm-with-iwmmxt.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/arm-with-iwmmxt.dat arm-with-iwmmxt.c
-arm-with-vfpv2.o : arm-with-vfpv2.c $(regdef_h)
 arm-with-vfpv2.c : $(srcdir)/../regformats/arm-with-vfpv2.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/arm-with-vfpv2.dat arm-with-vfpv2.c
-arm-with-vfpv3.o : arm-with-vfpv3.c $(regdef_h)
 arm-with-vfpv3.c : $(srcdir)/../regformats/arm-with-vfpv3.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/arm-with-vfpv3.dat arm-with-vfpv3.c
-arm-with-neon.o : arm-with-neon.c $(regdef_h)
 arm-with-neon.c : $(srcdir)/../regformats/arm-with-neon.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/arm-with-neon.dat arm-with-neon.c
-reg-bfin.o : reg-bfin.c $(regdef_h)
 reg-bfin.c : $(srcdir)/../regformats/reg-bfin.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/reg-bfin.dat reg-bfin.c
-reg-cris.o : reg-cris.c $(regdef_h)
 reg-cris.c : $(srcdir)/../regformats/reg-cris.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/reg-cris.dat reg-cris.c
-reg-crisv32.o : reg-crisv32.c $(regdef_h)
 reg-crisv32.c : $(srcdir)/../regformats/reg-crisv32.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/reg-crisv32.dat reg-crisv32.c
-i386.o : i386.c $(regdef_h)
 i386.c : $(srcdir)/../regformats/i386/i386.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/i386/i386.dat i386.c
-i386-linux.o : i386-linux.c $(regdef_h)
 i386-linux.c : $(srcdir)/../regformats/i386/i386-linux.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/i386/i386-linux.dat i386-linux.c
-i386-avx.o : i386-avx.c $(regdef_h)
 i386-avx.c : $(srcdir)/../regformats/i386/i386-avx.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/i386/i386-avx.dat i386-avx.c
-i386-avx-linux.o : i386-avx-linux.c $(regdef_h)
 i386-avx-linux.c : $(srcdir)/../regformats/i386/i386-avx-linux.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/i386/i386-avx-linux.dat i386-avx-linux.c
-i386-mmx.o : i386-mmx.c $(regdef_h)
 i386-mmx.c : $(srcdir)/../regformats/i386/i386-mmx.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/i386/i386-mmx.dat i386-mmx.c
-i386-mmx-linux.o : i386-mmx-linux.c $(regdef_h)
 i386-mmx-linux.c : $(srcdir)/../regformats/i386/i386-mmx-linux.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/i386/i386-mmx-linux.dat i386-mmx-linux.c
-reg-ia64.o : reg-ia64.c $(regdef_h)
 reg-ia64.c : $(srcdir)/../regformats/reg-ia64.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/reg-ia64.dat reg-ia64.c
-reg-m32r.o : reg-m32r.c $(regdef_h)
 reg-m32r.c : $(srcdir)/../regformats/reg-m32r.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/reg-m32r.dat reg-m32r.c
-reg-m68k.o : reg-m68k.c $(regdef_h)
 reg-m68k.c : $(srcdir)/../regformats/reg-m68k.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/reg-m68k.dat reg-m68k.c
-reg-cf.o : reg-cf.c $(regdef_h)
 reg-cf.c : $(srcdir)/../regformats/reg-cf.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/reg-cf.dat reg-cf.c
-mips-linux.o : mips-linux.c $(regdef_h)
 mips-linux.c : $(srcdir)/../regformats/mips-linux.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/mips-linux.dat mips-linux.c
-mips-dsp-linux.o : mips-dsp-linux.c $(regdef_h)
 mips-dsp-linux.c : $(srcdir)/../regformats/mips-dsp-linux.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/mips-dsp-linux.dat mips-dsp-linux.c
-mips64-linux.o : mips64-linux.c $(regdef_h)
 mips64-linux.c : $(srcdir)/../regformats/mips64-linux.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/mips64-linux.dat mips64-linux.c
-mips64-dsp-linux.o : mips64-dsp-linux.c $(regdef_h)
 mips64-dsp-linux.c : $(srcdir)/../regformats/mips64-dsp-linux.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/mips64-dsp-linux.dat mips64-dsp-linux.c
-powerpc-32.o : powerpc-32.c $(regdef_h)
 powerpc-32.c : $(srcdir)/../regformats/rs6000/powerpc-32.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/rs6000/powerpc-32.dat powerpc-32.c
-powerpc-32l.o : powerpc-32l.c $(regdef_h)
 powerpc-32l.c : $(srcdir)/../regformats/rs6000/powerpc-32l.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/rs6000/powerpc-32l.dat powerpc-32l.c
-powerpc-altivec32l.o : powerpc-altivec32l.c $(regdef_h)
 powerpc-altivec32l.c : $(srcdir)/../regformats/rs6000/powerpc-altivec32l.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/rs6000/powerpc-altivec32l.dat powerpc-altivec32l.c
-powerpc-cell32l.o : powerpc-cell32l.c $(regdef_h)
 powerpc-cell32l.c : $(srcdir)/../regformats/rs6000/powerpc-cell32l.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/rs6000/powerpc-cell32l.dat powerpc-cell32l.c
-powerpc-vsx32l.o : powerpc-vsx32l.c $(regdef_h)
 powerpc-vsx32l.c : $(srcdir)/../regformats/rs6000/powerpc-vsx32l.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/rs6000/powerpc-vsx32l.dat powerpc-vsx32l.c
-powerpc-isa205-32l.o : powerpc-isa205-32l.c $(regdef_h)
 powerpc-isa205-32l.c : $(srcdir)/../regformats/rs6000/powerpc-isa205-32l.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/rs6000/powerpc-isa205-32l.dat powerpc-isa205-32l.c
-powerpc-isa205-altivec32l.o : powerpc-isa205-altivec32l.c $(regdef_h)
 powerpc-isa205-altivec32l.c : $(srcdir)/../regformats/rs6000/powerpc-isa205-altivec32l.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/rs6000/powerpc-isa205-altivec32l.dat powerpc-isa205-altivec32l.c
-powerpc-isa205-vsx32l.o : powerpc-isa205-vsx32l.c $(regdef_h)
 powerpc-isa205-vsx32l.c : $(srcdir)/../regformats/rs6000/powerpc-isa205-vsx32l.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/rs6000/powerpc-isa205-vsx32l.dat powerpc-isa205-vsx32l.c
-powerpc-e500l.o : powerpc-e500l.c $(regdef_h)
 powerpc-e500l.c : $(srcdir)/../regformats/rs6000/powerpc-e500l.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/rs6000/powerpc-e500l.dat powerpc-e500l.c
-powerpc-64l.o : powerpc-64l.c $(regdef_h)
 powerpc-64l.c : $(srcdir)/../regformats/rs6000/powerpc-64l.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/rs6000/powerpc-64l.dat powerpc-64l.c
-powerpc-altivec64l.o : powerpc-altivec64l.c $(regdef_h)
 powerpc-altivec64l.c : $(srcdir)/../regformats/rs6000/powerpc-altivec64l.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/rs6000/powerpc-altivec64l.dat powerpc-altivec64l.c
-powerpc-cell64l.o : powerpc-cell64l.c $(regdef_h)
 powerpc-cell64l.c : $(srcdir)/../regformats/rs6000/powerpc-cell64l.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/rs6000/powerpc-cell64l.dat powerpc-cell64l.c
-powerpc-vsx64l.o : powerpc-vsx64l.c $(regdef_h)
 powerpc-vsx64l.c : $(srcdir)/../regformats/rs6000/powerpc-vsx64l.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/rs6000/powerpc-vsx64l.dat powerpc-vsx64l.c
-powerpc-isa205-64l.o : powerpc-isa205-64l.c $(regdef_h)
 powerpc-isa205-64l.c : $(srcdir)/../regformats/rs6000/powerpc-isa205-64l.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/rs6000/powerpc-isa205-64l.dat powerpc-isa205-64l.c
-powerpc-isa205-altivec64l.o : powerpc-isa205-altivec64l.c $(regdef_h)
 powerpc-isa205-altivec64l.c : $(srcdir)/../regformats/rs6000/powerpc-isa205-altivec64l.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/rs6000/powerpc-isa205-altivec64l.dat powerpc-isa205-altivec64l.c
-powerpc-isa205-vsx64l.o : powerpc-isa205-vsx64l.c $(regdef_h)
 powerpc-isa205-vsx64l.c : $(srcdir)/../regformats/rs6000/powerpc-isa205-vsx64l.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/rs6000/powerpc-isa205-vsx64l.dat powerpc-isa205-vsx64l.c
-s390-linux32.o : s390-linux32.c $(regdef_h)
 s390-linux32.c : $(srcdir)/../regformats/s390-linux32.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/s390-linux32.dat s390-linux32.c
-s390-linux32v1.o : s390-linux32v1.c $(regdef_h)
 s390-linux32v1.c : $(srcdir)/../regformats/s390-linux32v1.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/s390-linux32v1.dat s390-linux32v1.c
-s390-linux32v2.o : s390-linux32v2.c $(regdef_h)
 s390-linux32v2.c : $(srcdir)/../regformats/s390-linux32v2.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/s390-linux32v2.dat s390-linux32v2.c
-s390-linux64.o : s390-linux64.c $(regdef_h)
 s390-linux64.c : $(srcdir)/../regformats/s390-linux64.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/s390-linux64.dat s390-linux64.c
-s390-linux64v1.o : s390-linux64v1.c $(regdef_h)
 s390-linux64v1.c : $(srcdir)/../regformats/s390-linux64v1.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/s390-linux64v1.dat s390-linux64v1.c
-s390-linux64v2.o : s390-linux64v2.c $(regdef_h)
 s390-linux64v2.c : $(srcdir)/../regformats/s390-linux64v2.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/s390-linux64v2.dat s390-linux64v2.c
-s390x-linux64.o : s390x-linux64.c $(regdef_h)
 s390x-linux64.c : $(srcdir)/../regformats/s390x-linux64.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/s390x-linux64.dat s390x-linux64.c
-s390x-linux64v1.o : s390x-linux64v1.c $(regdef_h)
 s390x-linux64v1.c : $(srcdir)/../regformats/s390x-linux64v1.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/s390x-linux64v1.dat s390x-linux64v1.c
-s390x-linux64v2.o : s390x-linux64v2.c $(regdef_h)
 s390x-linux64v2.c : $(srcdir)/../regformats/s390x-linux64v2.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/s390x-linux64v2.dat s390x-linux64v2.c
 
-tic6x-c64xp-linux.o : tic6x-c64xp-linux.c $(regdef_h)
 tic6x-c64xp-linux.c : $(srcdir)/../regformats/tic6x-c64xp-linux.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/tic6x-c64xp-linux.dat tic6x-c64xp-linux.c
-tic6x-c64x-linux.o : tic6x-c64x-linux.c $(regdef_h)
 tic6x-c64x-linux.c : $(srcdir)/../regformats/tic6x-c64x-linux.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/tic6x-c64x-linux.dat tic6x-c64x-linux.c
-tic6x-c62x-linux.o : tic6x-c62x-linux.c $(regdef_h)
 tic6x-c62x-linux.c : $(srcdir)/../regformats/tic6x-c62x-linux.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/tic6x-c62x-linux.dat tic6x-c62x-linux.c
 
-reg-sh.o : reg-sh.c $(regdef_h)
 reg-sh.c : $(srcdir)/../regformats/reg-sh.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/reg-sh.dat reg-sh.c
-reg-sparc64.o : reg-sparc64.c $(regdef_h)
 reg-sparc64.c : $(srcdir)/../regformats/reg-sparc64.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/reg-sparc64.dat reg-sparc64.c
-reg-spu.o : reg-spu.c $(regdef_h)
 reg-spu.c : $(srcdir)/../regformats/reg-spu.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/reg-spu.dat reg-spu.c
-amd64.o : amd64.c $(regdef_h)
 amd64.c : $(srcdir)/../regformats/i386/amd64.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/i386/amd64.dat amd64.c
-amd64-linux.o : amd64-linux.c $(regdef_h)
 amd64-linux.c : $(srcdir)/../regformats/i386/amd64-linux.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/i386/amd64-linux.dat amd64-linux.c
-amd64-avx.o : amd64-avx.c $(regdef_h)
 amd64-avx.c : $(srcdir)/../regformats/i386/amd64-avx.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/i386/amd64-avx.dat amd64-avx.c
-amd64-avx-linux.o : amd64-avx-linux.c $(regdef_h)
 amd64-avx-linux.c : $(srcdir)/../regformats/i386/amd64-avx-linux.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/i386/amd64-avx-linux.dat amd64-avx-linux.c
-x32.o : x32.c $(regdef_h)
 x32.c : $(srcdir)/../regformats/i386/x32.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/i386/x32.dat x32.c
-x32-linux.o : x32-linux.c $(regdef_h)
 x32-linux.c : $(srcdir)/../regformats/i386/x32-linux.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/i386/x32-linux.dat x32-linux.c
-x32-avx.o : x32-avx.c $(regdef_h)
 x32-avx.c : $(srcdir)/../regformats/i386/x32-avx.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/i386/x32-avx.dat x32-avx.c
-x32-avx-linux.o : x32-avx-linux.c $(regdef_h)
 x32-avx-linux.c : $(srcdir)/../regformats/i386/x32-avx-linux.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/i386/x32-avx-linux.dat x32-avx-linux.c
-reg-xtensa.o : reg-xtensa.c $(regdef_h)
 reg-xtensa.c : $(srcdir)/../regformats/reg-xtensa.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/reg-xtensa.dat reg-xtensa.c
-reg-tilegx.o : reg-tilegx.c $(regdef_h)
 reg-tilegx.c : $(srcdir)/../regformats/reg-tilegx.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/reg-tilegx.dat reg-tilegx.c
+
+#
+# Dependency tracking.  Most of this is conditional on GNU Make being
+# found by configure; if GNU Make is not found, we fall back to a
+# simpler scheme.
+#
+
+@GMAKE_TRUE@ifeq ($(DEPMODE),depmode=gcc3)
+# Note that we put the dependencies into a .Tpo file, then move them
+# into place if the compile succeeds.  We need this because gcc does
+# not atomically write the dependency output file.
+@GMAKE_TRUE@override COMPILE.post = -c -o $@ -MT $@ -MMD -MP \
+@GMAKE_TRUE@	-MF $(DEPDIR)/$(basename $(@F)).Tpo
+@GMAKE_TRUE@override POSTCOMPILE = @mv $(DEPDIR)/$(basename $(@F)).Tpo \
+@GMAKE_TRUE@	$(DEPDIR)/$(basename $(@F)).Po
+@GMAKE_TRUE@else
+@GMAKE_TRUE@override COMPILE.pre = source='$<' object='$@' libtool=no \
+@GMAKE_TRUE@	DEPDIR=$(DEPDIR) $(DEPMODE) $(depcomp) $(CC)
+# depcomp handles atomicity for us, so we don't need a postcompile
+# step.
+@GMAKE_TRUE@override POSTCOMPILE =
+@GMAKE_TRUE@endif
+
+# A list of all the objects we might care about in this build, for
+# dependency tracking.
+all_object_files = $(OBS) $(GDBREPLAY_OBS)
+
+# Ensure that generated files are created early.  Use order-only
+# dependencies if available.  They require GNU make 3.80 or newer,
+# and the .VARIABLES variable was introduced at the same time.
+@GMAKE_TRUE@ifdef .VARIABLES
+@GMAKE_TRUE@$(all_object_files): | $(generated_files)
+@GMAKE_TRUE@else
+$(all_object_files) : $(generated_files)
+@GMAKE_TRUE@endif
+
+# Dependencies.
+@GMAKE_TRUE@-include $(patsubst %.o, $(DEPDIR)/%.Po, $(all_object_files))
+
 # This is the end of "Makefile.in".
diff --git a/gdb/gdbserver/aclocal.m4 b/gdb/gdbserver/aclocal.m4
index 7b546b7..55bf0d8 100644
--- a/gdb/gdbserver/aclocal.m4
+++ b/gdb/gdbserver/aclocal.m4
@@ -106,4 +106,6 @@ AC_DEFUN([_AM_SUBST_NOTMAKE])
 # Public sister of _AM_SUBST_NOTMAKE.
 AC_DEFUN([AM_SUBST_NOTMAKE], [_AM_SUBST_NOTMAKE($@)])
 
+m4_include([../../config/depstand.m4])
+m4_include([../../config/lead-dot.m4])
 m4_include([acinclude.m4])
diff --git a/gdb/gdbserver/configure.ac b/gdb/gdbserver/configure.ac
index 35da28b..6493c0f 100644
--- a/gdb/gdbserver/configure.ac
+++ b/gdb/gdbserver/configure.ac
@@ -40,8 +40,20 @@ AC_HEADER_DIRENT
 
 AC_FUNC_ALLOCA
 
+# Dependency checking.
+ZW_CREATE_DEPDIR
+ZW_PROG_COMPILER_DEPENDENCIES([CC])
+
 # Check for the 'make' the user wants to use.
 AC_CHECK_PROGS(MAKE, make)
+MAKE_IS_GNU=
+case "`$MAKE --version 2>&1 | sed 1q`" in
+  *GNU*)
+    MAKE_IS_GNU=yes
+    ;;
+esac
+AM_CONDITIONAL(GMAKE, test "$MAKE_IS_GNU" = yes)
+AC_PROG_MAKE_SET
 
 # Configure gnulib.  We can't use AC_CONFIG_SUBDIRS as that'd expect
 # to find the the source subdir to be configured directly under