2002-12-02 Nathanael Nerode <neroden@gcc.gnu.org>

	(finishing slow-motion replay)
	* configure: Remove skip-this-dir support.
	* Makefile.tpl: Remove skip-this-dir support.

	* Makefile.tpl: Remove leftover support for non-autoconfiscated
	subdirectories.
	* Makefile.in: Regenerate.

	* Makefile.tpl: Strip out useless setting of 'dir'.
	* Makefile.in: Regenerate.

2002-12-02  Nathanael Nerode  <neroden@gcc.gnu.org>

	(finishing slow-motion replay)
	* configure.in: Fix deeply stupid bug.

	* configure.in: Introduce RAW_CXX_FOR_TARGET and simplify embedded
	shell code in CXX_FOR_TARGET
	* Makefile.def: Introduce raw_cxx.
	* Makefile.tpl: Use raw_cxx to select between CXX_FOR_TARGET and
	RAW_CXX_FOR_TARGET.
	* Makefile.in: Regenerate.

2002-12-02  Nathanael Nerode  <neroden@gcc.gnu.org>

	(finishing slow-motion replay)
	* Makefile.tpl: Remove unnecessary ifs.
	* Makefile.in: Regenerate.

	* Makefile.tpl: Implement soft dependency machinery.  Maybe-ize
	dependencies.  Maybe-ize build-libiberty.  Create dummy install
	targets for 'no_install' modules.
	* configure: Move GDB_TK substitution to configure.in.  Move
	build_modules stuff to configure.in.
	* configure.in: Implement soft dependency machinery.  Maybe-ize
	GDB_TK, rearrange slightly.  Move build_modules stuff from configure.
	* Makefile.in: Regenerate.

1 files changed, 134 insertions, 182 deletions

diff --git a/Makefile.tpl b/Makefile.tpl
index 6ccb817f2ec..45181c19157 100644
--- a/Makefile.tpl
+++ b/Makefile.tpl
@@ -256,7 +256,9 @@ REALLY_SET_LIB_PATH = \
 FLAGS_FOR_TARGET = @FLAGS_FOR_TARGET@
 CC_FOR_TARGET = @CC_FOR_TARGET@
 CXX_FOR_TARGET = @CXX_FOR_TARGET@
+RAW_CXX_FOR_TARGET = @RAW_CXX_FOR_TARGET@
 CXX_FOR_TARGET_FOR_RECURSIVE_MAKE = @CXX_FOR_TARGET_FOR_RECURSIVE_MAKE@
+RAW_CXX_FOR_TARGET_FOR_RECURSIVE_MAKE = @RAW_CXX_FOR_TARGET_FOR_RECURSIVE_MAKE@
 GCJ_FOR_TARGET = @GCJ_FOR_TARGET@
 
 # If GCC_FOR_TARGET is not overriden on the command line, then this
@@ -439,7 +441,8 @@ BASE_FLAGS_TO_PASS = \
 # so we pass these variables down unchanged.  They must not contain
 # single nor double quotes.
 RECURSE_FLAGS = \
-	CXX_FOR_TARGET='$(CXX_FOR_TARGET_FOR_RECURSIVE_MAKE)'
+	CXX_FOR_TARGET='$(CXX_FOR_TARGET_FOR_RECURSIVE_MAKE)' \
+	RAW_CXX_FOR_TARGET='$(RAW_CXX_FOR_TARGET_FOR_RECURSIVE_MAKE)' \
 
 # Flags to pass down to most sub-makes, in which we're building with
 # the host environment.
@@ -522,18 +525,6 @@ EXTRA_GCC_FLAGS = \
 
 GCC_FLAGS_TO_PASS = $(BASE_FLAGS_TO_PASS) $(EXTRA_GCC_FLAGS)
 
-# This is a list of the targets for all of the modules which are compiled
-# using the build machine's native compiler.  Configure edits the second
-# macro for build!=host builds.
-ALL_BUILD_MODULES_LIST = \
-	all-build-libiberty
-ALL_BUILD_MODULES = @all_build_modules@
-
-# This is a list of the configure targets for all of the modules which
-# are compiled using the native tools.
-CONFIGURE_BUILD_MODULES = \
-	configure-build-libiberty
-
 # This is a list of the configure targets for all of the modules which
 # are compiled using the target tools.
 CONFIGURE_TARGET_MODULES = [+ FOR target_modules +]\
@@ -792,7 +783,8 @@ gcc-no-fixedincludes:
 # These rules are used to build the modules which are built with the
 # build machine's native compiler.
 [+ FOR build_modules +]
-.PHONY: all-build-[+module+]
+.PHONY: all-build-[+module+] maybe-all-build-[+module+]
+maybe-all-build-[+module+]:
 all-build-[+module+]:
 	@if [ -f ./[+module+]/Makefile ] ; then \
 	  r=`${PWD}`; export r; \
@@ -802,7 +794,8 @@ all-build-[+module+]:
 	  true; \
 	fi
 
-.PHONY: configure-build-[+module+]
+.PHONY: configure-build-[+module+] maybe-configure-build-[+module+]
+maybe-configure-build-[+module+]:
 configure-build-[+module+]:
 	@if [ ! -d $(BUILD_SUBDIR) ]; then \
 	  true; \
@@ -861,24 +854,11 @@ configure-build-[+module+]:
 	      srcdiroption="--srcdir=$${topdir}/[+module+]"; \
 	      libsrcdir="$$s/[+module+]"; \
 	    fi; \
-	    if [ -f $${libsrcdir}/configure ] ; then \
-	      rm -f no-such-file skip-this-dir; \
-	      CONFIG_SITE=no-such-file $(SHELL) $${libsrcdir}/configure \
-		$(BUILD_CONFIGARGS) $${srcdiroption} \
-		--with-build-subdir="$(BUILD_SUBDIR)"; \
-	    else \
-	      rm -f no-such-file skip-this-dir; \
-	      CONFIG_SITE=no-such-file $(SHELL) $$s/configure \
-		$(BUILD_CONFIGARGS) $${srcdiroption} \
-		--with-build-subdir="$(BUILD_SUBDIR)"; \
-	    fi || exit 1; \
-	    if [ -f skip-this-dir ] ; then \
-	      sh skip-this-dir; \
-	      rm -f skip-this-dir; \
-	      cd ..; rmdir [+module+] || true; \
-	    else \
-	      true; \
-	    fi; \
+	    rm -f no-such-file || : ; \
+	    CONFIG_SITE=no-such-file $(SHELL) $${libsrcdir}/configure \
+	      $(BUILD_CONFIGARGS) $${srcdiroption} \
+	      --with-build-subdir="$(BUILD_SUBDIR)" \
+	      || exit 1; \
 	  else \
 	    true; \
 	  fi; \
@@ -890,20 +870,16 @@ configure-build-[+module+]:
 # These rules are used to build the modules which use FLAGS_TO_PASS.  To
 # build a target all-X means to cd to X and make all.
 [+ FOR host_modules +]
-.PHONY: all-[+module+]
+.PHONY: all-[+module+] maybe-all-[+module+]
+maybe-all-[+module+]:
 all-[+module+]:
-	@dir=[+module+]; \
-	if [ -f ./[+module+]/Makefile ] ; then \
-	  r=`${PWD}`; export r; \
+	@r=`${PWD}`; export r; \
 	  s=`cd $(srcdir); ${PWD}`; export s; \
 	  $(SET_LIB_PATH) \
 	  (cd [+module+]; $(MAKE) $(FLAGS_TO_PASS)[+ 
 	    IF with_x 
 	      +] $(X11_FLAGS_TO_PASS)[+ 
-	    ENDIF with_x +] all); \
-	else \
-	  true; \
-	fi
+	    ENDIF with_x +] all)
 
 [+ IF no_check +]
 .PHONY: check-[+module+]
@@ -913,8 +889,6 @@ check-[+module+]:
 # This module is only tested in a native toolchain.
 check-[+module+]:
 	@if [ '$(host_canonical)' = '$(target_canonical)' ] ; then \
-	  dir=[+module+]; \
-	  if [ -f ./[+module+]/Makefile ] ; then \
 	    r=`${PWD}`; export r; \
 	    s=`cd $(srcdir); ${PWD}`; export s; \
 	    $(SET_LIB_PATH) \
@@ -922,55 +896,44 @@ check-[+module+]:
 	      IF with_x 
 	        +] $(X11_FLAGS_TO_PASS)[+ 
 	      ENDIF with_x +] check); \
-	  else \
-	    true; \
-	  fi; \
 	fi
 [+ ELSE check +]
 .PHONY: check-[+module+]
 check-[+module+]:
-	@dir=[+module+]; \
-	if [ -f ./[+module+]/Makefile ] ; then \
-	  r=`${PWD}`; export r; \
+	@r=`${PWD}`; export r; \
 	  s=`cd $(srcdir); ${PWD}`; export s; \
 	  $(SET_LIB_PATH) \
 	  (cd [+module+]; $(MAKE) $(FLAGS_TO_PASS)[+ 
 	    IF with_x 
 	      +] $(X11_FLAGS_TO_PASS)[+ 
-	    ENDIF with_x +] check); \
-	else \
-	  true; \
-	fi
+	    ENDIF with_x +] check)
 [+ ENDIF no_check +]
 
 [+ IF no_install +]
-.PHONY: install-[+module+]
+.PHONY: install-[+module+] maybe-install-[+module+]
+maybe-install-[+module+]:
 install-[+module+]:
 [+ ELSE install +]
-.PHONY: install-[+module+]
+.PHONY: install-[+module+] maybe-install-[+module+]
+maybe-install-[+module+]:
 install-[+module+]: installdirs
-	@dir=[+module+]; \
-	if [ -f ./[+module+]/Makefile ] ; then \
-	  r=`${PWD}`; export r; \
+	@r=`${PWD}`; export r; \
 	  s=`cd $(srcdir); ${PWD}`; export s; \
 	  $(SET_LIB_PATH) \
 	  (cd [+module+]; $(MAKE) $(FLAGS_TO_PASS)[+ 
 	    IF with_x 
 	      +] $(X11_FLAGS_TO_PASS)[+ 
-	    ENDIF with_x +] install); \
-	else \
-	  true; \
-	fi
+	    ENDIF with_x +] install)
 [+ ENDIF no_install +]
 [+ ENDFOR host_modules +]
 
 # These rules are used to build the modules which are built with the target
 # tools.  To make foo-X means to cd to X and make foo.
 [+ FOR target_modules +]
-.PHONY: configure-target-[+module+]
+.PHONY: configure-target-[+module+] maybe-configure-target-[+module+]
+maybe-configure-target-[+module+]:
 configure-target-[+module+]:
-	@if [ -d $(TARGET_SUBDIR)/[+module+] ]; then \
-	  r=`${PWD}`; export r; \
+	@r=`${PWD}`; export r; \
 	  $(CC_FOR_TARGET) --print-multi-lib > $(TARGET_SUBDIR)/[+module+]/tmpmulti.out 2> /dev/null; \
 	  if [ -s $(TARGET_SUBDIR)/[+module+]/tmpmulti.out ]; then \
 	    if [ -f $(TARGET_SUBDIR)/[+module+]/multilib.out ]; then \
@@ -984,15 +947,8 @@ configure-target-[+module+]:
 	    else \
 	      mv $(TARGET_SUBDIR)/[+module+]/tmpmulti.out $(TARGET_SUBDIR)/[+module+]/multilib.out; \
 	    fi; \
-	  fi; \
 	fi; exit 0	# break command into two pieces
-	@dir=[+module+] ; \
-	if [ ! -d $(TARGET_SUBDIR) ]; then \
-	  true; \
-	elif [ -f $(TARGET_SUBDIR)/[+module+]/Makefile ] ; then \
-	  true; \
-	elif echo " $(TARGET_CONFIGDIRS) " | grep " [+module+] " >/dev/null 2>&1; then \
-	  if [ -d $(srcdir)/[+module+] ]; then \
+	@if [ -d $(srcdir)/[+module+] ]; then \
 	    [ -d $(TARGET_SUBDIR)/[+module+] ] || mkdir $(TARGET_SUBDIR)/[+module+];\
 	    r=`${PWD}`; export r; \
 	    s=`cd $(srcdir); ${PWD}`; export s; \
@@ -1000,8 +956,13 @@ configure-target-[+module+]:
 	    AR="$(AR_FOR_TARGET)"; export AR; \
 	    AS="$(AS_FOR_TARGET)"; export AS; \
 	    CC="$(CC_FOR_TARGET)"; export CC; \
-	    CFLAGS="$(CFLAGS_FOR_TARGET)"; export CFLAGS; \
-	    CXX="$(CXX_FOR_TARGET)"; export CXX; \
+	    CFLAGS="$(CFLAGS_FOR_TARGET)"; export CFLAGS; \[+ 
+	IF raw_cxx +]
+	    CXX_FOR_TARGET="$(RAW_CXX_FOR_TARGET)"; export CXX_FOR_TARGET; \
+	    CXX="$(RAW_CXX_FOR_TARGET)"; export CXX; \[+ 
+	ELSE normal_cxx +]
+	    CXX="$(CXX_FOR_TARGET)"; export CXX; \[+ 
+	ENDIF raw_cxx +]
 	    CXXFLAGS="$(CXXFLAGS_FOR_TARGET)"; export CXXFLAGS; \
 	    GCJ="$(GCJ_FOR_TARGET)"; export GCJ; \
 	    DLLTOOL="$(DLLTOOL_FOR_TARGET)"; export DLLTOOL; \
@@ -1045,43 +1006,27 @@ configure-target-[+module+]:
 	      srcdiroption="--srcdir=$${topdir}/[+module+]"; \
 	      libsrcdir="$$s/[+module+]"; \
 	    fi; \
-	    if [ -f $${libsrcdir}/configure ] ; then \
-	      rm -f no-such-file skip-this-dir; \
-	      CONFIG_SITE=no-such-file $(SHELL) $${libsrcdir}/configure \
-		$(TARGET_CONFIGARGS) $${srcdiroption} \
-		--with-target-subdir="$(TARGET_SUBDIR)"; \
-	    else \
-	      rm -f no-such-file skip-this-dir; \
-	      CONFIG_SITE=no-such-file $(SHELL) $$s/configure \
-		$(TARGET_CONFIGARGS) $${srcdiroption} \
-		--with-target-subdir="$(TARGET_SUBDIR)"; \
-	    fi || exit 1; \
-	    if [ -f skip-this-dir ] ; then \
-	      sh skip-this-dir; \
-	      rm -f skip-this-dir; \
-	      cd ..; rmdir [+module+] || true; \
-	    else \
-	      true; \
-	    fi; \
+	    rm -f no-such-file || : ; \
+	    CONFIG_SITE=no-such-file $(SHELL) $${libsrcdir}/configure \
+	      $(TARGET_CONFIGARGS) $${srcdiroption} \
+	      --with-target-subdir="$(TARGET_SUBDIR)" \
+	      || exit 1; \
 	  else \
 	    true; \
-	  fi; \
-	else \
-	  true; \
-	fi
+	  fi
 
-.PHONY: all-target-[+module+]
+.PHONY: all-target-[+module+] maybe-all-target-[+module+]
+maybe-all-target-[+module+]:
 all-target-[+module+]:
-	@dir=[+module+] ; \
-	if [ -f $(TARGET_SUBDIR)/[+module+]/Makefile ] ; then \
-	  r=`${PWD}`; export r; \
+	@r=`${PWD}`; export r; \
 	  s=`cd $(srcdir); ${PWD}`; export s; \
 	  $(SET_LIB_PATH) \
 	  (cd $(TARGET_SUBDIR)/[+module+]; \
-	    $(MAKE) $(TARGET_FLAGS_TO_PASS) all); \
-	else \
-	  true; \
-	fi
+	    $(MAKE) $(TARGET_FLAGS_TO_PASS) [+
+	       IF raw_cxx 
+	         +] 'CXX=$$(RAW_CXX_FOR_TARGET)' 'CXX_FOR_TARGET=$$(RAW_CXX_FOR_TARGET)' [+ 
+	       ENDIF raw_cxx 
+	    +] all)
 [+ IF no_check +]
 # Dummy target for uncheckable module.
 .PHONY: check-target-[+module+]
@@ -1089,35 +1034,36 @@ check-target-[+module+]:
 [+ ELSE check +]
 .PHONY: check-target-[+module+]
 check-target-[+module+]:
-	@dir=[+module+] ; \
-	if [ -f $(TARGET_SUBDIR)/[+module+]/Makefile ] ; then \
-	  r=`${PWD}`; export r; \
+	@r=`${PWD}`; export r; \
 	  s=`cd $(srcdir); ${PWD}`; export s; \
 	  $(SET_LIB_PATH) \
 	  (cd $(TARGET_SUBDIR)/[+module+]; \
-	    $(MAKE) $(TARGET_FLAGS_TO_PASS) check);\
-	else \
-	  true; \
-	fi
+	    $(MAKE) $(TARGET_FLAGS_TO_PASS) [+
+	       IF raw_cxx 
+	         +] 'CXX=$$(RAW_CXX_FOR_TARGET)' 'CXX_FOR_TARGET=$$(RAW_CXX_FOR_TARGET)' [+ 
+	       ENDIF raw_cxx 
+	    +] check)
 [+ ENDIF no_check +]
-[+ IF no_install +][+ ELSE install +]\
-.PHONY: install-target-[+module+]
+[+ IF no_install +]
+.PHONY: install-target-[+module+] maybe-install-target-[+module+]
+maybe-install-target-[+module+]:
+# Dummy target for uninstallable.
+install-target-[+module+]:
+[+ ELSE install +]
+.PHONY: install-target-[+module+] maybe-install-target-[+module+]
+maybe-install-target-[+module+]:
 install-target-[+module+]: installdirs
-	@dir=[+module+] ; \
-	if [ -f $(TARGET_SUBDIR)/[+module+]/Makefile ] ; then \
-	  r=`${PWD}`; export r; \
+	@r=`${PWD}`; export r; \
 	  s=`cd $(srcdir); ${PWD}`; export s; \
 	  $(SET_LIB_PATH) \
 	  (cd $(TARGET_SUBDIR)/[+module+]; \
-	    $(MAKE) $(TARGET_FLAGS_TO_PASS) install); \
-	else \
-	  true; \
-	fi
+	    $(MAKE) $(TARGET_FLAGS_TO_PASS) install)
 [+ ENDIF no_install +]
 [+ ENDFOR target_modules +]
 
 # gcc is the only module which uses GCC_FLAGS_TO_PASS.
-.PHONY: all-gcc
+.PHONY: all-gcc maybe-all-gcc
+maybe-all-gcc:
 all-gcc:
 	@if [ -f ./gcc/Makefile ] ; then \
 	  r=`${PWD}`; export r; \
@@ -1204,7 +1150,8 @@ check-c++:
 	  true; \
 	fi 
 
-.PHONY: install-gcc
+.PHONY: install-gcc maybe-install-gcc
+maybe-install-gcc:
 install-gcc:
 	@if [ -f ./gcc/Makefile ] ; then \
 	  r=`${PWD}`; export r; \
@@ -1215,98 +1162,103 @@ install-gcc:
 	  true; \
 	fi
 
-ALL_GCC = all-gcc
-ALL_GCC_C = $(ALL_GCC) all-target-newlib all-target-libgloss
-ALL_GCC_CXX = $(ALL_GCC_C) all-target-libstdc++-v3
+ALL_GCC = maybe-all-gcc
+ALL_GCC_C = $(ALL_GCC) maybe-all-target-newlib maybe-all-target-libgloss
+ALL_GCC_CXX = $(ALL_GCC_C) maybe-all-target-libstdc++-v3
 
 # This is a list of inter-dependencies among modules.
-all-autoconf: all-m4 all-texinfo
-all-automake: all-m4 all-texinfo
-all-bfd: all-libiberty all-intl
-all-binutils: all-libiberty all-opcodes all-bfd all-flex all-bison all-byacc all-intl
-all-bison: all-texinfo
-configure-target-boehm-gc: $(ALL_GCC_C) configure-target-qthreads
-all-dejagnu: all-tcl all-expect all-tk
-all-diff: all-libiberty
+all-autoconf: maybe-all-m4 maybe-all-texinfo
+all-automake: maybe-all-m4 maybe-all-texinfo
+all-bfd: maybe-all-libiberty maybe-all-intl
+all-binutils: maybe-all-libiberty maybe-all-opcodes maybe-all-bfd maybe-all-flex maybe-all-bison maybe-all-byacc maybe-all-intl
+all-bison: maybe-all-texinfo
+configure-target-boehm-gc: $(ALL_GCC_C) maybe-configure-target-qthreads
+all-dejagnu: maybe-all-tcl maybe-all-expect maybe-all-tk
+all-diff: maybe-all-libiberty
 configure-target-examples: $(ALL_GCC_C)
-all-expect: all-tcl all-tk
-all-fileutils: all-libiberty
-all-flex: all-libiberty all-bison all-byacc
-all-gas: all-libiberty all-opcodes all-bfd all-intl
-all-gcc: all-libiberty all-bison all-byacc all-binutils all-gas all-ld all-zlib
-all-bootstrap: all-libiberty all-texinfo all-bison all-byacc all-binutils all-gas all-ld all-zlib
+all-expect: maybe-all-tcl maybe-all-tk
+all-fileutils: maybe-all-libiberty
+all-flex: maybe-all-libiberty maybe-all-bison maybe-all-byacc
+all-gas: maybe-all-libiberty maybe-all-opcodes maybe-all-bfd maybe-all-intl
+all-gcc: maybe-all-libiberty maybe-all-bison maybe-all-byacc maybe-all-binutils maybe-all-gas maybe-all-ld maybe-all-zlib
+all-bootstrap: maybe-all-libiberty maybe-all-texinfo maybe-all-bison maybe-all-byacc maybe-all-binutils maybe-all-gas maybe-all-ld maybe-all-zlib
 GDB_TK = @GDB_TK@
-all-gdb: all-libiberty all-opcodes all-bfd all-mmalloc all-readline all-bison all-byacc all-sim $(gdbnlmrequirements) $(GDB_TK)
+all-gdb: maybe-all-libiberty maybe-all-opcodes maybe-all-bfd maybe-all-mmalloc maybe-all-readline maybe-all-bison maybe-all-byacc maybe-all-sim $(gdbnlmrequirements) $(GDB_TK)
 configure-target-gperf: $(ALL_GCC_CXX)
-all-target-gperf: all-target-libiberty all-target-libstdc++-v3
-all-gprof: all-libiberty all-bfd all-opcodes all-intl
-all-grep: all-libiberty
-all-gzip: all-libiberty
-all-hello: all-libiberty
-all-itcl: all-tcl all-tk
-all-ld: all-libiberty all-bfd all-opcodes all-bison all-byacc all-flex all-intl
+all-target-gperf: maybe-all-target-libiberty maybe-all-target-libstdc++-v3
+all-gprof: maybe-all-libiberty maybe-all-bfd maybe-all-opcodes maybe-all-intl
+all-grep: maybe-all-libiberty
+all-gzip: maybe-all-libiberty
+all-hello: maybe-all-libiberty
+all-itcl: maybe-all-tcl maybe-all-tk
+all-ld: maybe-all-libiberty maybe-all-bfd maybe-all-opcodes maybe-all-bison maybe-all-byacc maybe-all-flex maybe-all-intl
 configure-target-libgloss: $(ALL_GCC)
-all-target-libgloss: configure-target-newlib
-all-libgui: all-tcl all-tk all-itcl
+all-target-libgloss: maybe-configure-target-newlib
+all-libgui: maybe-all-tcl maybe-all-tk maybe-all-itcl
 configure-target-libffi: $(ALL_GCC_C) 
-configure-target-libjava: $(ALL_GCC_C) configure-target-zlib configure-target-boehm-gc configure-target-qthreads configure-target-libffi
-all-target-libjava: all-fastjar all-target-zlib all-target-boehm-gc all-target-qthreads all-target-libffi
+configure-target-libjava: $(ALL_GCC_C) maybe-configure-target-zlib maybe-configure-target-boehm-gc maybe-configure-target-qthreads maybe-configure-target-libffi
+all-target-libjava: maybe-all-fastjar maybe-all-target-zlib maybe-all-target-boehm-gc maybe-all-target-qthreads maybe-all-target-libffi
 configure-target-libstdc++-v3: $(ALL_GCC_C)
-all-target-libstdc++-v3: all-target-libiberty
+all-target-libstdc++-v3: maybe-all-target-libiberty
 configure-target-libf2c: $(ALL_GCC_C)
-all-target-libf2c: all-target-libiberty
+all-target-libf2c: maybe-all-target-libiberty
 configure-target-libobjc: $(ALL_GCC_C)
-all-target-libobjc: all-target-libiberty
-all-m4: all-libiberty all-texinfo
-all-make: all-libiberty
+all-target-libobjc: maybe-all-target-libiberty
+all-m4: maybe-all-libiberty maybe-all-texinfo
+all-make: maybe-all-libiberty
 configure-target-newlib: $(ALL_GCC)
 configure-target-libtermcap: $(ALL_GCC_C)
-all-opcodes: all-bfd all-libiberty
-all-patch: all-libiberty
-all-prms: all-libiberty
+all-opcodes: maybe-all-bfd maybe-all-libiberty
+all-patch: maybe-all-libiberty
+all-prms: maybe-all-libiberty
 configure-target-qthreads: $(ALL_GCC_C)
-all-recode: all-libiberty
-all-sed: all-libiberty
-all-send-pr: all-prms
-all-sid: all-tcl all-tk
-all-sim: all-libiberty all-bfd all-opcodes all-readline
-all-snavigator: all-tcl all-tk all-itcl all-tix all-db all-grep all-libgui
-all-tar: all-libiberty
-all-tclX: all-tcl all-tk
-all-tk: all-tcl
-all-texinfo: all-libiberty
-all-tix: all-tcl all-tk
+all-recode: maybe-all-libiberty
+all-sed: maybe-all-libiberty
+all-send-pr: maybe-all-prms
+all-sid: maybe-all-tcl maybe-all-tk
+all-sim: maybe-all-libiberty maybe-all-bfd maybe-all-opcodes maybe-all-readline
+all-snavigator: maybe-all-tcl maybe-all-tk maybe-all-itcl maybe-all-tix maybe-all-db maybe-all-grep maybe-all-libgui
+all-tar: maybe-all-libiberty
+all-tclX: maybe-all-tcl maybe-all-tk
+all-tk: maybe-all-tcl
+all-texinfo: maybe-all-libiberty
+all-tix: maybe-all-tcl maybe-all-tk
 configure-target-winsup: $(ALL_GCC_C)
-all-target-winsup: all-target-libiberty all-target-libtermcap
-all-uudecode: all-libiberty
+all-target-winsup: maybe-all-target-libiberty maybe-all-target-libtermcap
+all-uudecode: maybe-all-libiberty
 configure-target-zlib: $(ALL_GCC_C)
-all-fastjar: all-zlib all-libiberty
-configure-target-fastjar: configure-target-zlib
-all-target-fastjar: all-target-zlib all-target-libiberty
+all-fastjar: maybe-all-zlib maybe-all-libiberty
+configure-target-fastjar: maybe-configure-target-zlib
+all-target-fastjar: maybe-all-target-zlib maybe-all-target-libiberty
 configure-target-libiberty: $(ALL_GCC_C)
-install-gdb: install-tcl install-tk install-itcl install-tix install-libgui
-install-sid: install-tcl install-tk
+install-gdb: maybe-install-tcl maybe-install-tk maybe-install-itcl maybe-install-tix maybe-install-libgui
+install-sid: maybe-install-tcl maybe-install-tk
 
 # We put install-opcodes before install-binutils because the installed
 # binutils might be on PATH, and they might need the shared opcodes
 # library.
-install-binutils: install-opcodes
+install-binutils: maybe-install-opcodes
 
 # We put install-tcl before install-itcl because itcl wants to run a
 # program on installation which uses the Tcl libraries.
-install-itcl: install-tcl
+install-itcl: maybe-install-tcl
 
 # This is a slightly kludgy method of getting dependencies on 
 # all-build-libiberty correct; it would be better to build it every time.
-all-gcc: @all_build_modules@
+all-gcc: maybe-all-build-libiberty
 
 # Dependencies of all-build-foo on configure-build-foo.
-all-build-libiberty: configure-build-libiberty
+[+ FOR build_modules +]all-build-[+module+]: configure-build-[+module+]
+[+ ENDFOR build_modules +]
 
 # Dependencies of all-target-foo on configure-target-foo.
 [+ FOR target_modules +]all-target-[+module+]: configure-target-[+module+]
 [+ ENDFOR target_modules +]
 
+# Dependencies of maybe-foo on foo.  These are used because, for example,
+# all-gcc only depends on all-gas if gas is present and being configured.
+@maybe_dependencies@
+
 ### other supporting targets
 
 MAKEDIRS= \