--- a/Makefile.in
+++ b/Makefile.in
@@ -89,22 +89,22 @@ DIST_GARBAGE = config.cache config.log c
    $(topsrcdir)/.mozconfig.mk $(topsrcdir)/.mozconfig.out
 
 ifdef WINCE
 check::
 	$(PYTHON) $(topsrcdir)/build/mobile/devicemanager-utils.py copy $(DIST)/bin
 endif
 
 default alldep all:: $(topsrcdir)/configure config.status
-	$(RM) -rf $(DIST)/sdk
-	$(RM) -rf $(DIST)/include
-	$(RM) -rf $(DIST)/private
-	$(RM) -rf $(DIST)/public
-	$(RM) -rf $(DIST)/bin/components
-	$(RM) -rf _tests
+	$(RM) -r $(DIST)/sdk
+	$(RM) -r $(DIST)/include
+	$(RM) -r $(DIST)/private
+	$(RM) -r $(DIST)/public
+	$(RM) -r $(DIST)/bin/components
+	$(RM) -r _tests
 
 $(topsrcdir)/configure: $(topsrcdir)/configure.in
 	@echo "STOP!  configure.in has changed, and your configure is out of date."
 	@echo "Please rerun autoconf and re-configure your build directory."
 	@echo "To ignore this message, touch 'configure' in the source directory,"
 	@echo "but your build might not succeed."
 	@exit 1
 
@@ -112,30 +112,30 @@ config.status: $(topsrcdir)/configure
 	@echo "STOP!  configure has changed and needs to be run in this build directory."
 	@echo "Please rerun configure."
 	@echo "To ignore this message, touch 'config.status' in the build directory,"
 	@echo "but your build might not succeed."
 	@exit 1
 
 # Build pseudo-external modules first when export is explicitly called
 export::
-	$(RM) -rf $(DIST)/sdk
+	$(RM) -r $(DIST)/sdk
 	$(MAKE) -C config export
 	$(MAKE) tier_nspr
 
 ifdef ENABLE_TESTS
 # Additional makefile targets to call automated test suites
 include $(topsrcdir)/testing/testsuite-targets.mk
 endif
 
 include $(topsrcdir)/config/rules.mk
 
 distclean::
 	cat unallmakefiles | $(XARGS) rm -f
-	rm -f unallmakefiles $(DIST_GARBAGE)
+	$(RM) unallmakefiles $(DIST_GARBAGE)
 
 ifeq ($(OS_ARCH),WINNT)
 # we want to copy PDB files on Windows
 MAKE_SYM_STORE_ARGS := -c --vcs-info
 ifdef PDBSTR_PATH
 MAKE_SYM_STORE_ARGS += -i
 endif
 DUMP_SYMS_BIN ?= $(topsrcdir)/toolkit/crashreporter/tools/win32/dump_syms_vc$(_MSC_VER).exe
@@ -171,18 +171,18 @@ export SYMBOL_INDEX_NAME = \
   $(MOZ_APP_NAME)-$(MOZ_APP_VERSION)-$(OS_TARGET)-$(BUILDID)$(EXTRA_BUILDID)-symbols.txt
 
 buildsymbols:
 ifdef MOZ_CRASHREPORTER
 ifdef USE_ELF_HACK
 	$(MAKE) -C $(MOZ_BUILD_APP)/installer elfhack
 endif
 	echo building symbol store
-	$(RM) -rf $(DIST)/crashreporter-symbols
-	$(RM) -f "$(DIST)/$(SYMBOL_ARCHIVE_BASENAME).zip"
+	$(RM) -r $(DIST)/crashreporter-symbols
+	$(RM) "$(DIST)/$(SYMBOL_ARCHIVE_BASENAME).zip"
 	$(NSINSTALL) -D $(DIST)/crashreporter-symbols
 	$(PYTHON) $(topsrcdir)/toolkit/crashreporter/tools/symbolstore.py \
 	  $(MAKE_SYM_STORE_ARGS)                                          \
 	  $(foreach dir,$(SYM_STORE_SOURCE_DIRS),-s $(dir))               \
 	  $(DUMP_SYMS_BIN)                                                \
 	  $(DIST)/crashreporter-symbols                                   \
 	  $(MAKE_SYM_STORE_PATH) >                                        \
 	  $(DIST)/crashreporter-symbols/$(SYMBOL_INDEX_NAME)
@@ -194,18 +194,18 @@ endif
 	grep "sym" $(SYMBOL_INDEX_NAME) > $(SYMBOL_INDEX_NAME).tmp && \
 	  mv $(SYMBOL_INDEX_NAME).tmp $(SYMBOL_INDEX_NAME)
 	cd $(DIST)/crashreporter-symbols && \
           zip -r9D "../$(PKG_PATH)$(SYMBOL_ARCHIVE_BASENAME).zip" . -i "*.sym" -i "*.txt"
 else
 ifdef WINCE
 ifdef SYMBOLSTORE_PATH
 	echo building symbol store with symstore.exe
-	$(RM) -rf $(DIST)/symbols
-	$(RM) -f "$(DIST)/$(SYMBOL_ARCHIVE_BASENAME).zip"
+	$(RM) -r $(DIST)/symbols
+	$(RM) "$(DIST)/$(SYMBOL_ARCHIVE_BASENAME).zip"
 	$(NSINSTALL) -D $(DIST)/symbols
 	$(SYMBOLSTORE_PATH) add -r -f "$(subst /,\,$(shell pwd -W))\*.PDB" \
 	  -s $(DIST)/symbols/ -t "$(MOZ_PKG_APPNAME)" -v "$(MOZ_PKG_VERSION)"
 	echo packing symbols
 	$(NSINSTALL) -D $(DIST)/$(PKG_PATH)
 	cd $(DIST)/symbols && \
 	  zip -r9D "../$(PKG_PATH)$(SYMBOL_ARCHIVE_BASENAME).zip" .
 endif # SYMBOLSTORE_PATH

--- a/browser/app/Makefile.in
+++ b/browser/app/Makefile.in
@@ -313,37 +313,37 @@ endif
 
 LOWER_APP_NAME = $(shell echo $(APP_NAME) | tr '[A-Z]' '[a-z]')
 
 AB_CD = $(MOZ_UI_LOCALE)
 
 AB := $(firstword $(subst -, ,$(AB_CD)))
 
 clean clobber repackage::
-	rm -rf $(DIST)/$(APP_NAME).app
+	$(RM) -r $(DIST)/$(APP_NAME).app
 
 ifdef LIBXUL_SDK
 APPFILES = Resources
 else
 APPFILES = MacOS
 endif
 
 libs repackage:: $(PROGRAM) application.ini
-	mkdir -p $(DIST)/$(APP_NAME).app/Contents/MacOS
+	$(MKDIR) -p $(DIST)/$(APP_NAME).app/Contents/MacOS
 	rsync -a --exclude CVS --exclude "*.in" $(srcdir)/macbuild/Contents $(DIST)/$(APP_NAME).app --exclude English.lproj
-	mkdir -p $(DIST)/$(APP_NAME).app/Contents/Resources/$(AB).lproj
+	$(MKDIR) -p $(DIST)/$(APP_NAME).app/Contents/Resources/$(AB).lproj
 	rsync -a --exclude CVS --exclude "*.in" $(srcdir)/macbuild/Contents/Resources/English.lproj/ $(DIST)/$(APP_NAME).app/Contents/Resources/$(AB).lproj
 	sed -e "s/%APP_VERSION%/$(APP_VERSION)/" -e "s/%APP_NAME%/$(APP_NAME)/" -e "s/%LOWER_APP_NAME%/$(LOWER_APP_NAME)/" $(srcdir)/macbuild/Contents/Info.plist.in > $(DIST)/$(APP_NAME).app/Contents/Info.plist
 	sed -e "s/%APP_NAME%/$(APP_NAME)/" $(srcdir)/macbuild/Contents/Resources/English.lproj/InfoPlist.strings.in | iconv -f UTF-8 -t UTF-16 > $(DIST)/$(APP_NAME).app/Contents/Resources/$(AB).lproj/InfoPlist.strings
 	rsync -a $(DIST)/bin/ $(DIST)/$(APP_NAME).app/Contents/$(APPFILES)
 	$(RM) $(DIST)/$(APP_NAME).app/Contents/$(APPFILES)/mangle $(DIST)/$(APP_NAME).app/Contents/$(APPFILES)/shlibsign
 ifdef LIBXUL_SDK
 	cp $(LIBXUL_DIST)/bin/$(XR_STUB_NAME) $(DIST)/$(APP_NAME).app/Contents/MacOS/firefox-bin
 else
-	rm -f $(DIST)/$(APP_NAME).app/Contents/MacOS/$(PROGRAM)
+	$(RM) $(DIST)/$(APP_NAME).app/Contents/MacOS/$(PROGRAM)
 	rsync -aL $(PROGRAM) $(DIST)/$(APP_NAME).app/Contents/MacOS
 endif
 	-cp -L $(DIST)/bin/mangle $(DIST)/bin/shlibsign $(DIST)/$(APP_NAME).app/Contents/$(APPFILES)
 	cp -RL $(DIST)/branding/firefox.icns $(DIST)/$(APP_NAME).app/Contents/Resources/firefox.icns
 	cp -RL $(DIST)/branding/document.icns $(DIST)/$(APP_NAME).app/Contents/Resources/document.icns
 	printf APPLMOZB > $(DIST)/$(APP_NAME).app/Contents/PkgInfo
 #       remove CVS dirs from packaged app
 	find $(DIST)/$(APP_NAME).app -type d -name "CVS" -prune -exec rm -rf {} \;

--- a/browser/installer/windows/Makefile.in
+++ b/browser/installer/windows/Makefile.in
@@ -89,27 +89,29 @@ endif
 
 installer::
 	$(MAKE) -C .. installer-stage
 	$(MAKE) $(CONFIG_DIR)/setup.exe
 
 # For building the uninstaller during the application build so it can be
 # included for mar file generation.
 uninstaller::
-	$(RM) -rf $(CONFIG_DIR) && mkdir $(CONFIG_DIR)
+	$(RM) -r $(CONFIG_DIR)
+	$(MKDIR) $(CONFIG_DIR)
 	$(INSTALL) $(addprefix $(srcdir)/,$(INSTALLER_FILES)) $(CONFIG_DIR)
 	$(INSTALL) $(addprefix $(DIST)/branding/,$(BRANDING_FILES)) $(CONFIG_DIR)
 	$(PYTHON) $(topsrcdir)/config/Preprocessor.py -Fsubstitution $(DEFINES) $(ACDEFINES) \
 	  $(srcdir)/nsis/defines.nsi.in > $(CONFIG_DIR)/defines.nsi
 	$(PYTHON) $(topsrcdir)/toolkit/mozapps/installer/windows/nsis/preprocess-locale.py \
 	  --preprocess-locale $(topsrcdir) \
 	  $(PPL_LOCALE_ARGS) $(AB_CD) $(CONFIG_DIR)
 
 $(CONFIG_DIR)/setup.exe::
-	$(RM) -rf $(CONFIG_DIR) && mkdir $(CONFIG_DIR)
+	$(RM) -r $(CONFIG_DIR)
+	$(MKDIR) $(CONFIG_DIR)
 	$(INSTALL) $(addprefix $(srcdir)/,$(INSTALLER_FILES)) $(CONFIG_DIR)
 	$(INSTALL) $(addprefix $(DIST)/branding/,$(BRANDING_FILES)) $(CONFIG_DIR)
 	$(PYTHON) $(topsrcdir)/config/Preprocessor.py -Fsubstitution $(DEFINES) $(ACDEFINES) \
 	  $(srcdir)/nsis/defines.nsi.in > $(CONFIG_DIR)/defines.nsi
 	$(PYTHON) $(topsrcdir)/toolkit/mozapps/installer/windows/nsis/preprocess-locale.py \
 	  --preprocess-locale $(topsrcdir) \
 	  $(PPL_LOCALE_ARGS) $(AB_CD) $(CONFIG_DIR)
 

--- a/config/Makefile.in
+++ b/config/Makefile.in
@@ -99,18 +99,17 @@ endif
 
 HEADERS = \
 	$(DEPTH)/mozilla-config.h \
 	$(srcdir)/nsStaticComponents.h \
 	$(NULL)
 
 export:: $(TARGETS) $(HEADERS)
 	$(INSTALL) $(IFLAGS1) $(HEADERS) $(DIST)/include
-	-rm -f $(FINAL_LINK_COMPS) $(FINAL_LINK_LIBS) $(FINAL_LINK_COMP_NAMES)
-	-rm -f $(DIST)/bin/chrome/chromelist.txt
+	-$(RM) $(FINAL_LINK_COMPS) $(FINAL_LINK_LIBS) $(FINAL_LINK_COMP_NAMES)
 ifdef HOST_PROGRAM
 	$(INSTALL) $(HOST_PROGRAM) $(DIST)/bin
 endif
 
 # Generate a new buildid every time we "export" in config... that's only
 # supposed to be once per-build!
 export::
 ifdef MOZ_BUILD_DATE

--- a/config/config.mk
+++ b/config/config.mk
@@ -154,16 +154,19 @@ JEMALLOC_LIBS = $(MKSHLIB_FORCE_ALL) $(c
 ifneq (,$(SIMPLE_PROGRAMS)$(PROGRAM))
 JEMALLOC_LIBS += $(MOZ_JEMALLOC_STANDALONE_GLUE_LDOPTS)
 endif
 endif
 endif
 
 CC := $(CC_WRAPPER) $(CC)
 CXX := $(CXX_WRAPPER) $(CXX)
+MKDIR ?= mkdir
+SLEEP ?= sleep
+TOUCH ?= touch
 
 # determine debug-related options
 _DEBUG_CFLAGS :=
 _DEBUG_LDFLAGS :=
 
 ifdef MOZ_DEBUG
   _DEBUG_CFLAGS += $(MOZ_DEBUG_ENABLE_DEFS) $(MOZ_DEBUG_FLAGS)
   _DEBUG_LDFLAGS += $(MOZ_DEBUG_LDFLAGS)

--- a/config/rules.mk
+++ b/config/rules.mk
@@ -929,42 +929,42 @@ endif # MOZ_PROFILE_GENERATE || MOZ_PROF
 endif # NO_PROFILE_GUIDED_OPTIMIZE
 
 ##############################################
 
 checkout:
 	$(MAKE) -C $(topsrcdir) -f client.mk checkout
 
 clean clobber realclean clobber_all:: $(SUBMAKEFILES)
-	-rm -f $(ALL_TRASH)
-	-rm -rf $(ALL_TRASH_DIRS)
+	-$(RM) $(ALL_TRASH)
+	-$(RM) -r $(ALL_TRASH_DIRS)
 	$(foreach dir,$(PARALLEL_DIRS) $(DIRS) $(STATIC_DIRS) $(TOOL_DIRS),-$(call SUBMAKE,$@,$(dir)))
 
 distclean:: $(SUBMAKEFILES)
 	$(foreach dir,$(PARALLEL_DIRS) $(DIRS) $(STATIC_DIRS) $(TOOL_DIRS),-$(call SUBMAKE,$@,$(dir)))
-	-rm -rf $(ALL_TRASH_DIRS) 
-	-rm -f $(ALL_TRASH)  \
+	-$(RM) -r $(ALL_TRASH_DIRS) 
+	-$(RM) $(ALL_TRASH)  \
 	Makefile .HSancillary \
 	$(wildcard *.$(OBJ_SUFFIX)) $(wildcard *.ho) $(wildcard host_*.o*) \
 	$(wildcard *.$(LIB_SUFFIX)) $(wildcard *$(DLL_SUFFIX)) \
 	$(wildcard *.$(IMPORT_LIB_SUFFIX))
 ifeq ($(OS_ARCH),OS2)
-	-rm -f $(PROGRAM:.exe=.map)
+	-$(RM) $(PROGRAM:.exe=.map)
 endif
 
 alltags:
-	rm -f TAGS
+	$(RM) TAGS
 	find $(topsrcdir) -name dist -prune -o \( -name '*.[hc]' -o -name '*.cp' -o -name '*.cpp' -o -name '*.idl' \) -print | $(TAG_PROGRAM)
 
 #
 # PROGRAM = Foo
 # creates OBJS, links with LIBS to create Foo
 #
 $(PROGRAM): $(PROGOBJS) $(LIBS_DEPS) $(EXTRA_DEPS) $(EXE_DEF_FILE) $(RESFILE) $(GLOBAL_DEPS)
-	@rm -f $@.manifest
+	@$(RM) $@.manifest
 ifeq (WINCE,$(OS_ARCH))
 	$(EXPAND_LD) -NOLOGO -OUT:$@ $(WIN32_EXE_LDFLAGS) $(LDFLAGS) $(PROGOBJS) $(RESFILE) $(LIBS) $(EXTRA_LIBS) $(OS_LIBS)
 else
 ifeq (_WINNT,$(GNU_CC)_$(OS_ARCH))
 	$(EXPAND_LD) -NOLOGO -OUT:$@ -PDB:$(LINK_PDBFILE) $(WIN32_EXE_LDFLAGS) $(LDFLAGS) $(PROGOBJS) $(RESFILE) $(LIBS) $(EXTRA_LIBS) $(OS_LIBS)
 ifdef MSMANIFEST_TOOL
 	@if test -f $@.manifest; then \
 		if test -f "$(srcdir)/$@.manifest"; then \
@@ -1105,46 +1105,46 @@ ifndef NO_DIST_INSTALL
 	$(INSTALL) $(IFLAGS2) $^.quantify $(FINAL_TARGET)
 endif
 
 ifdef DTRACE_PROBE_OBJ
 EXTRA_DEPS += $(DTRACE_PROBE_OBJ)
 endif
 
 $(filter %.$(LIB_SUFFIX),$(LIBRARY)): $(OBJS) $(LOBJS) $(SHARED_LIBRARY_LIBS_DEPS) $(EXTRA_DEPS) $(GLOBAL_DEPS)
-	rm -f $(LIBRARY)
+	$(RM) $(LIBRARY)
 	$(EXPAND_AR) $(AR_FLAGS) $(OBJS) $(LOBJS) $(SHARED_LIBRARY_LIBS)
 	$(RANLIB) $@
 
 $(filter-out %.$(LIB_SUFFIX),$(LIBRARY)): $(filter %.$(LIB_SUFFIX),$(LIBRARY)) $(OBJS) $(LOBJS) $(SHARED_LIBRARY_LIBS_DEPS) $(EXTRA_DEPS) $(GLOBAL_DEPS)
 	$(EXPAND_LIBS_GEN) $(OBJS) $(LOBJS) $(SHARED_LIBRARY_LIBS) > $@
 
 ifeq (,$(filter-out WINNT WINCE, $(OS_ARCH)))
 $(IMPORT_LIBRARY): $(SHARED_LIBRARY)
 endif
 
 ifeq ($(OS_ARCH),OS2)
 $(DEF_FILE): $(OBJS) $(SHARED_LIBRARY_LIBS)
-	rm -f $@
+	$(RM) $@
 	echo LIBRARY $(SHARED_LIBRARY_NAME) INITINSTANCE TERMINSTANCE > $@
 	echo PROTMODE >> $@
 	echo CODE    LOADONCALL MOVEABLE DISCARDABLE >> $@
 	echo DATA    PRELOAD MOVEABLE MULTIPLE NONSHARED >> $@
 	echo EXPORTS >> $@
 
 	$(ADD_TO_DEF_FILE)
 
 $(IMPORT_LIBRARY): $(SHARED_LIBRARY)
-	rm -f $@
+	$(RM) $@
 	$(IMPLIB) $@ $^
 	$(RANLIB) $@
 endif # OS/2
 
 $(HOST_LIBRARY): $(HOST_OBJS) Makefile
-	rm -f $@
+	$(RM) $@
 	$(HOST_AR) $(HOST_AR_FLAGS) $(HOST_OBJS)
 	$(HOST_RANLIB) $@
 
 ifdef HAVE_DTRACE
 ifndef XP_MACOSX
 ifdef DTRACE_PROBE_OBJ
 ifndef DTRACE_LIB_DEPENDENT
 $(DTRACE_PROBE_OBJ): $(OBJS)
@@ -1156,24 +1156,24 @@ endif
 
 # On Darwin (Mac OS X), dwarf2 debugging uses debug info left in .o files,
 # so instead of deleting .o files after repacking them into a dylib, we make
 # symlinks back to the originals. The symlinks are a no-op for stabs debugging,
 # so no need to conditionalize on OS version or debugging format.
 
 $(SHARED_LIBRARY): $(OBJS) $(LOBJS) $(DEF_FILE) $(RESFILE) $(SHARED_LIBRARY_LIBS_DEPS) $(LIBRARY) $(EXTRA_DEPS) $(DSO_LDOPTS_DEPS) $(GLOBAL_DEPS)
 ifndef INCREMENTAL_LINKER
-	rm -f $@
+	$(RM) $@
 endif
 ifdef DTRACE_LIB_DEPENDENT
 ifndef XP_MACOSX
 	dtrace -G -C -s $(MOZILLA_DTRACE_SRC) -o  $(DTRACE_PROBE_OBJ) $(shell $(EXPAND_LIBS) $(MOZILLA_PROBE_LIBS))
 endif
 	$(EXPAND_MKSHLIB) $(SHLIB_LDSTARTFILE) $(OBJS) $(LOBJS) $(SUB_SHLOBJS) $(DTRACE_PROBE_OBJ) $(MOZILLA_PROBE_LIBS) $(RESFILE) $(LDFLAGS) $(SHARED_LIBRARY_LIBS) $(EXTRA_DSO_LDOPTS) $(OS_LIBS) $(EXTRA_LIBS) $(DEF_FILE) $(SHLIB_LDENDFILE)
-	@rm -f $(DTRACE_PROBE_OBJ)
+	@$(RM) $(DTRACE_PROBE_OBJ)
 else # ! DTRACE_LIB_DEPENDENT
 	$(EXPAND_MKSHLIB) $(SHLIB_LDSTARTFILE) $(OBJS) $(DTRACE_PROBE_OBJ) $(LOBJS) $(SUB_SHLOBJS) $(RESFILE) $(LDFLAGS) $(SHARED_LIBRARY_LIBS) $(EXTRA_DSO_LDOPTS) $(OS_LIBS) $(EXTRA_LIBS) $(DEF_FILE) $(SHLIB_LDENDFILE)
 endif # DTRACE_LIB_DEPENDENT
 
 ifeq (_WINNT,$(GNU_CC)_$(OS_ARCH))
 ifdef MSMANIFEST_TOOL
 ifdef EMBED_MANIFEST_AT
 	@if test -f $@.manifest; then \
@@ -1181,17 +1181,17 @@ ifdef EMBED_MANIFEST_AT
 		rm -f $@.manifest; \
 	fi
 endif   # EMBED_MANIFEST_AT
 endif	# MSVC with manifest tool
 ifdef MOZ_PROFILE_GENERATE
 	touch -t `date +%Y%m%d%H%M.%S -d "now+5seconds"` pgo.relink
 endif
 endif	# WINNT && !GCC
-	@rm -f foodummyfilefoo $(DELETE_AFTER_LINK)
+	@$(RM) foodummyfilefoo $(DELETE_AFTER_LINK)
 	chmod +x $@
 ifdef ENABLE_STRIP
 	$(STRIP) $@
 endif
 ifdef MOZ_POST_DSO_LIB_COMMAND
 	$(MOZ_POST_DSO_LIB_COMMAND) $@
 endif
 
@@ -1297,17 +1297,17 @@ endif
 	$(ELOG) $(CCC) $(OUTOPTION)$@ -c $(COMPILE_CXXFLAGS) $(_VPATH_SRCS)
 
 %.$(OBJ_SUFFIX): %.cpp $(GLOBAL_DEPS)
 	$(REPORT_BUILD)
 	@$(MAKE_DEPS_AUTO_CXX)
 ifdef STRICT_CPLUSPLUS_SUFFIX
 	echo "#line 1 \"$*.cpp\"" | cat - $*.cpp > t_$*.cc
 	$(ELOG) $(CCC) -o $@ -c $(COMPILE_CXXFLAGS) t_$*.cc
-	rm -f t_$*.cc
+	$(RM) t_$*.cc
 else
 	$(ELOG) $(CCC) $(OUTOPTION)$@ -c $(COMPILE_CXXFLAGS) $(_VPATH_SRCS)
 endif #STRICT_CPLUSPLUS_SUFFIX
 
 $(OBJ_PREFIX)%.$(OBJ_SUFFIX): %.mm $(GLOBAL_DEPS)
 	$(REPORT_BUILD)
 	@$(MAKE_DEPS_AUTO_CXX)
 	$(ELOG) $(CCC) -o $@ -c $(COMPILE_CXXFLAGS) $(COMPILE_CMMFLAGS) $(_VPATH_SRCS)
@@ -1347,22 +1347,24 @@ ifdef GNU_CC
 	$(RC) $(RCFLAGS) $(filter-out -U%,$(DEFINES)) $(INCLUDES:-I%=--include-dir %) $(OUTOPTION)$@ $(_VPATH_SRCS)
 else
 	$(RC) $(RCFLAGS) -r $(DEFINES) $(INCLUDES) $(OUTOPTION)$@ $(_VPATH_SRCS)
 endif
 endif
 
 # need 3 separate lines for OS/2
 %:: %.pl
-	rm -f $@
+	$(RM) $@
 	cp $< $@
 	chmod +x $@
 
 %:: %.sh
-	rm -f $@; cp $< $@; chmod +x $@
+	$(RM) $@
+	cp $< $@
+	chmod +x $@
 
 # Cancel these implicit rules
 #
 %: %,v
 
 %: RCS/%,v
 
 %: s.%
@@ -1549,18 +1551,18 @@ export:: FORCE
 endif
 
 $(IDL_DIR)::
 	$(NSINSTALL) -D $@
 
 # generate .h files from into $(XPIDL_GEN_DIR), then export to $(DIST)/include;
 # warn against overriding existing .h file. 
 $(XPIDL_GEN_DIR)/.done:
-	@if test ! -d $(XPIDL_GEN_DIR); then echo Creating $(XPIDL_GEN_DIR)/.done; rm -rf $(XPIDL_GEN_DIR); mkdir $(XPIDL_GEN_DIR); fi
-	@touch $@
+	$(MKDIR) -p $(XPIDL_GEN_DIR)
+	@$(TOUCH) $@
 
 # don't depend on $(XPIDL_GEN_DIR), because the modification date changes
 # with any addition to the directory, regenerating all .h files -> everything.
 
 $(XPIDL_GEN_DIR)/%.h: %.idl $(XPIDL_COMPILE) $(XPIDL_GEN_DIR)/.done
 	$(REPORT_BUILD)
 	$(ELOG) $(XPIDL_COMPILE) -m header -w $(XPIDL_FLAGS) -o $(XPIDL_GEN_DIR)/$* $(_VPATH_SRCS)
 	@if test -n "$(findstring $*.h, $(EXPORTS))"; \
@@ -1646,17 +1648,17 @@ GARBAGE_DIRS += $(JAVA_GEN_DIR)
 # generate .java files into _javagen/[package name dirs]
 _JAVA_GEN_DIR = $(JAVA_GEN_DIR)/$(JAVA_IFACES_PKG_NAME)
 $(_JAVA_GEN_DIR):
 	$(NSINSTALL) -D $@
 
 $(JAVA_GEN_DIR)/.%.java.pp: %.idl $(XPIDL_COMPILE) $(_JAVA_GEN_DIR)
 	$(REPORT_BUILD)
 	$(ELOG) $(XPIDL_COMPILE) -m java -w $(XPIDL_FLAGS) -I$(srcdir) -I$(IDL_DIR) -o $(_JAVA_GEN_DIR)/$* $(_VPATH_SRCS)
-	@touch $@
+	@$(TOUCH) $@
 
 # "Install" generated Java interfaces.  We segregate them based on the XPI_NAME.
 # If XPI_NAME is not set, install into the "default" directory.
 ifneq ($(XPI_NAME),)
 JAVA_INSTALL_DIR = $(JAVA_DIST_DIR)/$(XPI_NAME)
 else
 JAVA_INSTALL_DIR = $(JAVA_DIST_DIR)/default
 endif
@@ -1844,17 +1846,17 @@ endif
 endif
 
 ifdef INSTALL_EXTENSION_ID
 ifndef XPI_NAME
 $(error XPI_NAME must be set for INSTALL_EXTENSION_ID)
 endif
 
 libs::
-	$(RM) -rf "$(DIST)/bin/extensions/$(INSTALL_EXTENSION_ID)"
+	$(RM) -r "$(DIST)/bin/extensions/$(INSTALL_EXTENSION_ID)"
 	$(NSINSTALL) -D "$(DIST)/bin/extensions/$(INSTALL_EXTENSION_ID)"
 	cd $(FINAL_TARGET) && tar $(TAR_CREATE_FLAGS) - . | (cd "../../bin/extensions/$(INSTALL_EXTENSION_ID)" && tar -xf -)
 
 endif
 
 ifneq (,$(filter flat symlink,$(MOZ_CHROME_FILE_FORMAT)))
 _JAR_REGCHROME_DISABLE_JAR=1
 else
@@ -1916,17 +1918,17 @@ depend:: $(SUBMAKEFILES) $(MAKE_DIRS) $(
 else
 depend:: $(SUBMAKEFILES)
 endif
 	$(LOOP_OVER_PARALLEL_DIRS)
 	$(LOOP_OVER_DIRS)
 	$(LOOP_OVER_TOOL_DIRS)
 
 dependclean:: $(SUBMAKEFILES)
-	rm -f $(MDDEPFILES)
+	$(RM) $(MDDEPFILES)
 	$(LOOP_OVER_PARALLEL_DIRS)
 	$(LOOP_OVER_DIRS)
 	$(LOOP_OVER_TOOL_DIRS)
 
 endif # MOZ_AUTO_DEPS
 
 endif # COMPILER_DEPEND
 
@@ -1939,17 +1941,17 @@ endif # COMPILER_DEPEND
 #
 #   We use $(CURDIR) in the rule's target to ensure that we don't find
 #   a dependency directory in the source tree via VPATH (perhaps from
 #   a previous build in the source tree) and thus neglect to create a
 #   dependency directory in the object directory, where we really need
 #   it.
 
 $(CURDIR)/$(MDDEPDIR):
-	@if test ! -d $@; then echo Creating $@; rm -rf $@; mkdir $@; else true; fi
+	$(MKDIR) -p $@
 
 ifneq (,$(filter-out all chrome default export realchrome tools clean clobber clobber_all distclean realclean,$(MAKECMDGOALS)))
 ifneq (,$(OBJS)$(XPIDLSRCS)$(SIMPLE_PROGRAMS))
 MDDEPEND_FILES		:= $(strip $(wildcard $(MDDEPDIR)/*.pp))
 
 ifneq (,$(MDDEPEND_FILES))
 # The script mddepend.pl checks the dependencies and writes to stdout
 # one rule to force out-of-date objects. For example,

--- a/js/src/Makefile.in
+++ b/js/src/Makefile.in
@@ -653,21 +653,21 @@ check-valgrind::
 endif
 
 DIST_GARBAGE = config.cache config.log config.status \
    config/autoconf.mk \
    unallmakefiles js-config js-config.h js-confdefs.h
 
 distclean::
 	cat unallmakefiles | $(XARGS) rm -f
-	rm -f $(DIST_GARBAGE)
+	$(RM) $(DIST_GARBAGE)
 
 # our build system doesn't handle subdir srcs very gracefully today
 export::
-	mkdir -p nanojit
+	$(MKDIR) -p nanojit
 
 DEFINES		+= -DEXPORT_JS_API
 
 # Some platforms that have stdint.h include it in system headers.  So
 # to reliably get limit macros defined, we'd always have to define the
 # one below before including any header, but that's obscure and
 # fragile, so we do it here.
 DEFINES		+= -D__STDC_LIMIT_MACROS
@@ -812,24 +812,24 @@ jsdtoa.o: jsdtoa.cpp Makefile.in
 	@$(MAKE_DEPS_AUTO_CXX)
 	$(CXX) -o $@ -c $(filter-out $(MOZ_OPTIMIZE_FLAGS), $(COMPILE_CFLAGS)) $<
 endif
 
 export:: jsautocfg.h
 
 ifeq (,$(CROSS_COMPILE)$(GNU_CC)$(filter-out WINNT,$(OS_ARCH)))
 jsautocfg.h:
-	touch $@
+	$(TOUCH) $@
 else
 ifeq ($(OS_ARCH),WINCE)
 jsautocfg.h:
-	touch $@
+	$(TOUCH) $@
 else
 jsautocfg.h: jscpucfg$(HOST_BIN_SUFFIX)
-	@rm -f $@ jsautocfg.tmp
+	@$(RM) $@ jsautocfg.tmp
 	./jscpucfg > jsautocfg.tmp
 	mv jsautocfg.tmp $@
 endif
 endif
 
 # jscpucfg is a strange target
 # Needs to be built with the host compiler but needs to include
 # the mdcpucfg for the target so it needs the appropriate target defines
@@ -879,17 +879,17 @@ JS_CONFIG_LIBS=$(EXTRA_DSO_LDOPTS) $(OS_
 # which libraries to build, what to name them, and what flags to pass
 # when linking them (and thus what flags its own clients must pass).
 # All this information needs to go into the js-config script.  To
 # avoid trying to re-compute all that in the configure script, we just
 # have the configure script generate this Makefile, and then invoke
 # this rule.
 at=@
 js-config: js-config.in Makefile $(DEPTH)/config/autoconf.mk $(topsrcdir)/config/config.mk $(topsrcdir)/config/rules.mk
-	rm -f js-config.tmp
+	$(RM) js-config.tmp
 	sed < $< > js-config.tmp \
 	-e 's|$(at)prefix$(at)|$(prefix)|' \
 	-e 's|$(at)exec_prefix$(at)|$(exec_prefix)|' \
 	-e 's|$(at)includedir$(at)|$(includedir)|' \
 	-e 's|$(at)libdir$(at)|$(libdir)|' \
 	-e 's|$(at)MOZILLA_VERSION$(at)|$(MOZILLA_VERSION)|' \
 	-e 's|$(at)LIBRARY_NAME$(at)|$(LIBRARY_NAME)|' \
 	-e 's|$(at)NSPR_CFLAGS$(at)|$(NSPR_CFLAGS)|' \
@@ -955,17 +955,17 @@ ifdef ENABLE_TRACEJIT
 
 # Code for importing the nanojit subtree from its repository.
 NANOJIT_CENTRAL_REV=$(shell cat $(srcdir)/nanojit-import-rev)
 NANOJIT_CENTRAL_REPO=http://hg.mozilla.org/projects/nanojit-central
 NANOJIT_CENTRAL_LOCAL=$(CURDIR)/nanojit-central
 CUR_REPO=$(srcdir)/../..
 
 update-nanojit:
-	rm -Rf $(NANOJIT_CENTRAL_LOCAL) import-splicemap import-revmap
+	$(RM) -r $(NANOJIT_CENTRAL_LOCAL) import-splicemap import-revmap
 	hg clone $(NANOJIT_CENTRAL_REPO) $(NANOJIT_CENTRAL_LOCAL)
 	python $(srcdir)/find-child.py \
 	                   --src=$(NANOJIT_CENTRAL_LOCAL) \
 	                   --dst=$(CUR_REPO) \
 	                   --start=$(NANOJIT_CENTRAL_REV) \
 	                   --filemap=$(srcdir)/nanojit-import-filemap \
 	                   >import-splicemap
 	hg convert --config convert.hg.saverev=True \

--- a/js/src/config/config.mk
+++ b/js/src/config/config.mk
@@ -154,16 +154,19 @@ JEMALLOC_LIBS = $(MKSHLIB_FORCE_ALL) $(c
 ifneq (,$(SIMPLE_PROGRAMS)$(PROGRAM))
 JEMALLOC_LIBS += $(MOZ_JEMALLOC_STANDALONE_GLUE_LDOPTS)
 endif
 endif
 endif
 
 CC := $(CC_WRAPPER) $(CC)
 CXX := $(CXX_WRAPPER) $(CXX)
+MKDIR ?= mkdir
+SLEEP ?= sleep
+TOUCH ?= touch
 
 # determine debug-related options
 _DEBUG_CFLAGS :=
 _DEBUG_LDFLAGS :=
 
 ifdef MOZ_DEBUG
   _DEBUG_CFLAGS += $(MOZ_DEBUG_ENABLE_DEFS) $(MOZ_DEBUG_FLAGS)
   _DEBUG_LDFLAGS += $(MOZ_DEBUG_LDFLAGS)

--- a/js/src/config/rules.mk
+++ b/js/src/config/rules.mk
@@ -929,42 +929,42 @@ endif # MOZ_PROFILE_GENERATE || MOZ_PROF
 endif # NO_PROFILE_GUIDED_OPTIMIZE
 
 ##############################################
 
 checkout:
 	$(MAKE) -C $(topsrcdir) -f client.mk checkout
 
 clean clobber realclean clobber_all:: $(SUBMAKEFILES)
-	-rm -f $(ALL_TRASH)
-	-rm -rf $(ALL_TRASH_DIRS)
+	-$(RM) $(ALL_TRASH)
+	-$(RM) -r $(ALL_TRASH_DIRS)
 	$(foreach dir,$(PARALLEL_DIRS) $(DIRS) $(STATIC_DIRS) $(TOOL_DIRS),-$(call SUBMAKE,$@,$(dir)))
 
 distclean:: $(SUBMAKEFILES)
 	$(foreach dir,$(PARALLEL_DIRS) $(DIRS) $(STATIC_DIRS) $(TOOL_DIRS),-$(call SUBMAKE,$@,$(dir)))
-	-rm -rf $(ALL_TRASH_DIRS) 
-	-rm -f $(ALL_TRASH)  \
+	-$(RM) -r $(ALL_TRASH_DIRS) 
+	-$(RM) $(ALL_TRASH)  \
 	Makefile .HSancillary \
 	$(wildcard *.$(OBJ_SUFFIX)) $(wildcard *.ho) $(wildcard host_*.o*) \
 	$(wildcard *.$(LIB_SUFFIX)) $(wildcard *$(DLL_SUFFIX)) \
 	$(wildcard *.$(IMPORT_LIB_SUFFIX))
 ifeq ($(OS_ARCH),OS2)
-	-rm -f $(PROGRAM:.exe=.map)
+	-$(RM) $(PROGRAM:.exe=.map)
 endif
 
 alltags:
-	rm -f TAGS
+	$(RM) TAGS
 	find $(topsrcdir) -name dist -prune -o \( -name '*.[hc]' -o -name '*.cp' -o -name '*.cpp' -o -name '*.idl' \) -print | $(TAG_PROGRAM)
 
 #
 # PROGRAM = Foo
 # creates OBJS, links with LIBS to create Foo
 #
 $(PROGRAM): $(PROGOBJS) $(LIBS_DEPS) $(EXTRA_DEPS) $(EXE_DEF_FILE) $(RESFILE) $(GLOBAL_DEPS)
-	@rm -f $@.manifest
+	@$(RM) $@.manifest
 ifeq (WINCE,$(OS_ARCH))
 	$(EXPAND_LD) -NOLOGO -OUT:$@ $(WIN32_EXE_LDFLAGS) $(LDFLAGS) $(PROGOBJS) $(RESFILE) $(LIBS) $(EXTRA_LIBS) $(OS_LIBS)
 else
 ifeq (_WINNT,$(GNU_CC)_$(OS_ARCH))
 	$(EXPAND_LD) -NOLOGO -OUT:$@ -PDB:$(LINK_PDBFILE) $(WIN32_EXE_LDFLAGS) $(LDFLAGS) $(PROGOBJS) $(RESFILE) $(LIBS) $(EXTRA_LIBS) $(OS_LIBS)
 ifdef MSMANIFEST_TOOL
 	@if test -f $@.manifest; then \
 		if test -f "$(srcdir)/$@.manifest"; then \
@@ -1105,46 +1105,46 @@ ifndef NO_DIST_INSTALL
 	$(INSTALL) $(IFLAGS2) $^.quantify $(FINAL_TARGET)
 endif
 
 ifdef DTRACE_PROBE_OBJ
 EXTRA_DEPS += $(DTRACE_PROBE_OBJ)
 endif
 
 $(filter %.$(LIB_SUFFIX),$(LIBRARY)): $(OBJS) $(LOBJS) $(SHARED_LIBRARY_LIBS_DEPS) $(EXTRA_DEPS) $(GLOBAL_DEPS)
-	rm -f $(LIBRARY)
+	$(RM) $(LIBRARY)
 	$(EXPAND_AR) $(AR_FLAGS) $(OBJS) $(LOBJS) $(SHARED_LIBRARY_LIBS)
 	$(RANLIB) $@
 
 $(filter-out %.$(LIB_SUFFIX),$(LIBRARY)): $(filter %.$(LIB_SUFFIX),$(LIBRARY)) $(OBJS) $(LOBJS) $(SHARED_LIBRARY_LIBS_DEPS) $(EXTRA_DEPS) $(GLOBAL_DEPS)
 	$(EXPAND_LIBS_GEN) $(OBJS) $(LOBJS) $(SHARED_LIBRARY_LIBS) > $@
 
 ifeq (,$(filter-out WINNT WINCE, $(OS_ARCH)))
 $(IMPORT_LIBRARY): $(SHARED_LIBRARY)
 endif
 
 ifeq ($(OS_ARCH),OS2)
 $(DEF_FILE): $(OBJS) $(SHARED_LIBRARY_LIBS)
-	rm -f $@
+	$(RM) $@
 	echo LIBRARY $(SHARED_LIBRARY_NAME) INITINSTANCE TERMINSTANCE > $@
 	echo PROTMODE >> $@
 	echo CODE    LOADONCALL MOVEABLE DISCARDABLE >> $@
 	echo DATA    PRELOAD MOVEABLE MULTIPLE NONSHARED >> $@
 	echo EXPORTS >> $@
 
 	$(ADD_TO_DEF_FILE)
 
 $(IMPORT_LIBRARY): $(SHARED_LIBRARY)
-	rm -f $@
+	$(RM) $@
 	$(IMPLIB) $@ $^
 	$(RANLIB) $@
 endif # OS/2
 
 $(HOST_LIBRARY): $(HOST_OBJS) Makefile
-	rm -f $@
+	$(RM) $@
 	$(HOST_AR) $(HOST_AR_FLAGS) $(HOST_OBJS)
 	$(HOST_RANLIB) $@
 
 ifdef HAVE_DTRACE
 ifndef XP_MACOSX
 ifdef DTRACE_PROBE_OBJ
 ifndef DTRACE_LIB_DEPENDENT
 $(DTRACE_PROBE_OBJ): $(OBJS)
@@ -1156,24 +1156,24 @@ endif
 
 # On Darwin (Mac OS X), dwarf2 debugging uses debug info left in .o files,
 # so instead of deleting .o files after repacking them into a dylib, we make
 # symlinks back to the originals. The symlinks are a no-op for stabs debugging,
 # so no need to conditionalize on OS version or debugging format.
 
 $(SHARED_LIBRARY): $(OBJS) $(LOBJS) $(DEF_FILE) $(RESFILE) $(SHARED_LIBRARY_LIBS_DEPS) $(LIBRARY) $(EXTRA_DEPS) $(DSO_LDOPTS_DEPS) $(GLOBAL_DEPS)
 ifndef INCREMENTAL_LINKER
-	rm -f $@
+	$(RM) $@
 endif
 ifdef DTRACE_LIB_DEPENDENT
 ifndef XP_MACOSX
 	dtrace -G -C -s $(MOZILLA_DTRACE_SRC) -o  $(DTRACE_PROBE_OBJ) $(shell $(EXPAND_LIBS) $(MOZILLA_PROBE_LIBS))
 endif
 	$(EXPAND_MKSHLIB) $(SHLIB_LDSTARTFILE) $(OBJS) $(LOBJS) $(SUB_SHLOBJS) $(DTRACE_PROBE_OBJ) $(MOZILLA_PROBE_LIBS) $(RESFILE) $(LDFLAGS) $(SHARED_LIBRARY_LIBS) $(EXTRA_DSO_LDOPTS) $(OS_LIBS) $(EXTRA_LIBS) $(DEF_FILE) $(SHLIB_LDENDFILE)
-	@rm -f $(DTRACE_PROBE_OBJ)
+	@$(RM) $(DTRACE_PROBE_OBJ)
 else # ! DTRACE_LIB_DEPENDENT
 	$(EXPAND_MKSHLIB) $(SHLIB_LDSTARTFILE) $(OBJS) $(DTRACE_PROBE_OBJ) $(LOBJS) $(SUB_SHLOBJS) $(RESFILE) $(LDFLAGS) $(SHARED_LIBRARY_LIBS) $(EXTRA_DSO_LDOPTS) $(OS_LIBS) $(EXTRA_LIBS) $(DEF_FILE) $(SHLIB_LDENDFILE)
 endif # DTRACE_LIB_DEPENDENT
 
 ifeq (_WINNT,$(GNU_CC)_$(OS_ARCH))
 ifdef MSMANIFEST_TOOL
 ifdef EMBED_MANIFEST_AT
 	@if test -f $@.manifest; then \
@@ -1181,17 +1181,17 @@ ifdef EMBED_MANIFEST_AT
 		rm -f $@.manifest; \
 	fi
 endif   # EMBED_MANIFEST_AT
 endif	# MSVC with manifest tool
 ifdef MOZ_PROFILE_GENERATE
 	touch -t `date +%Y%m%d%H%M.%S -d "now+5seconds"` pgo.relink
 endif
 endif	# WINNT && !GCC
-	@rm -f foodummyfilefoo $(DELETE_AFTER_LINK)
+	@$(RM) foodummyfilefoo $(DELETE_AFTER_LINK)
 	chmod +x $@
 ifdef ENABLE_STRIP
 	$(STRIP) $@
 endif
 ifdef MOZ_POST_DSO_LIB_COMMAND
 	$(MOZ_POST_DSO_LIB_COMMAND) $@
 endif
 
@@ -1297,17 +1297,17 @@ endif
 	$(ELOG) $(CCC) $(OUTOPTION)$@ -c $(COMPILE_CXXFLAGS) $(_VPATH_SRCS)
 
 %.$(OBJ_SUFFIX): %.cpp $(GLOBAL_DEPS)
 	$(REPORT_BUILD)
 	@$(MAKE_DEPS_AUTO_CXX)
 ifdef STRICT_CPLUSPLUS_SUFFIX
 	echo "#line 1 \"$*.cpp\"" | cat - $*.cpp > t_$*.cc
 	$(ELOG) $(CCC) -o $@ -c $(COMPILE_CXXFLAGS) t_$*.cc
-	rm -f t_$*.cc
+	$(RM) t_$*.cc
 else
 	$(ELOG) $(CCC) $(OUTOPTION)$@ -c $(COMPILE_CXXFLAGS) $(_VPATH_SRCS)
 endif #STRICT_CPLUSPLUS_SUFFIX
 
 $(OBJ_PREFIX)%.$(OBJ_SUFFIX): %.mm $(GLOBAL_DEPS)
 	$(REPORT_BUILD)
 	@$(MAKE_DEPS_AUTO_CXX)
 	$(ELOG) $(CCC) -o $@ -c $(COMPILE_CXXFLAGS) $(COMPILE_CMMFLAGS) $(_VPATH_SRCS)
@@ -1347,22 +1347,24 @@ ifdef GNU_CC
 	$(RC) $(RCFLAGS) $(filter-out -U%,$(DEFINES)) $(INCLUDES:-I%=--include-dir %) $(OUTOPTION)$@ $(_VPATH_SRCS)
 else
 	$(RC) $(RCFLAGS) -r $(DEFINES) $(INCLUDES) $(OUTOPTION)$@ $(_VPATH_SRCS)
 endif
 endif
 
 # need 3 separate lines for OS/2
 %:: %.pl
-	rm -f $@
+	$(RM) $@
 	cp $< $@
 	chmod +x $@
 
 %:: %.sh
-	rm -f $@; cp $< $@; chmod +x $@
+	$(RM) $@
+	cp $< $@
+	chmod +x $@
 
 # Cancel these implicit rules
 #
 %: %,v
 
 %: RCS/%,v
 
 %: s.%
@@ -1549,18 +1551,18 @@ export:: FORCE
 endif
 
 $(IDL_DIR)::
 	$(NSINSTALL) -D $@
 
 # generate .h files from into $(XPIDL_GEN_DIR), then export to $(DIST)/include;
 # warn against overriding existing .h file. 
 $(XPIDL_GEN_DIR)/.done:
-	@if test ! -d $(XPIDL_GEN_DIR); then echo Creating $(XPIDL_GEN_DIR)/.done; rm -rf $(XPIDL_GEN_DIR); mkdir $(XPIDL_GEN_DIR); fi
-	@touch $@
+	$(MKDIR) -p $(XPIDL_GEN_DIR)
+	@$(TOUCH) $@
 
 # don't depend on $(XPIDL_GEN_DIR), because the modification date changes
 # with any addition to the directory, regenerating all .h files -> everything.
 
 $(XPIDL_GEN_DIR)/%.h: %.idl $(XPIDL_COMPILE) $(XPIDL_GEN_DIR)/.done
 	$(REPORT_BUILD)
 	$(ELOG) $(XPIDL_COMPILE) -m header -w $(XPIDL_FLAGS) -o $(XPIDL_GEN_DIR)/$* $(_VPATH_SRCS)
 	@if test -n "$(findstring $*.h, $(EXPORTS))"; \
@@ -1646,17 +1648,17 @@ GARBAGE_DIRS += $(JAVA_GEN_DIR)
 # generate .java files into _javagen/[package name dirs]
 _JAVA_GEN_DIR = $(JAVA_GEN_DIR)/$(JAVA_IFACES_PKG_NAME)
 $(_JAVA_GEN_DIR):
 	$(NSINSTALL) -D $@
 
 $(JAVA_GEN_DIR)/.%.java.pp: %.idl $(XPIDL_COMPILE) $(_JAVA_GEN_DIR)
 	$(REPORT_BUILD)
 	$(ELOG) $(XPIDL_COMPILE) -m java -w $(XPIDL_FLAGS) -I$(srcdir) -I$(IDL_DIR) -o $(_JAVA_GEN_DIR)/$* $(_VPATH_SRCS)
-	@touch $@
+	@$(TOUCH) $@
 
 # "Install" generated Java interfaces.  We segregate them based on the XPI_NAME.
 # If XPI_NAME is not set, install into the "default" directory.
 ifneq ($(XPI_NAME),)
 JAVA_INSTALL_DIR = $(JAVA_DIST_DIR)/$(XPI_NAME)
 else
 JAVA_INSTALL_DIR = $(JAVA_DIST_DIR)/default
 endif
@@ -1844,17 +1846,17 @@ endif
 endif
 
 ifdef INSTALL_EXTENSION_ID
 ifndef XPI_NAME
 $(error XPI_NAME must be set for INSTALL_EXTENSION_ID)
 endif
 
 libs::
-	$(RM) -rf "$(DIST)/bin/extensions/$(INSTALL_EXTENSION_ID)"
+	$(RM) -r "$(DIST)/bin/extensions/$(INSTALL_EXTENSION_ID)"
 	$(NSINSTALL) -D "$(DIST)/bin/extensions/$(INSTALL_EXTENSION_ID)"
 	cd $(FINAL_TARGET) && tar $(TAR_CREATE_FLAGS) - . | (cd "../../bin/extensions/$(INSTALL_EXTENSION_ID)" && tar -xf -)
 
 endif
 
 ifneq (,$(filter flat symlink,$(MOZ_CHROME_FILE_FORMAT)))
 _JAR_REGCHROME_DISABLE_JAR=1
 else
@@ -1916,17 +1918,17 @@ depend:: $(SUBMAKEFILES) $(MAKE_DIRS) $(
 else
 depend:: $(SUBMAKEFILES)
 endif
 	$(LOOP_OVER_PARALLEL_DIRS)
 	$(LOOP_OVER_DIRS)
 	$(LOOP_OVER_TOOL_DIRS)
 
 dependclean:: $(SUBMAKEFILES)
-	rm -f $(MDDEPFILES)
+	$(RM) $(MDDEPFILES)
 	$(LOOP_OVER_PARALLEL_DIRS)
 	$(LOOP_OVER_DIRS)
 	$(LOOP_OVER_TOOL_DIRS)
 
 endif # MOZ_AUTO_DEPS
 
 endif # COMPILER_DEPEND
 
@@ -1939,17 +1941,17 @@ endif # COMPILER_DEPEND
 #
 #   We use $(CURDIR) in the rule's target to ensure that we don't find
 #   a dependency directory in the source tree via VPATH (perhaps from
 #   a previous build in the source tree) and thus neglect to create a
 #   dependency directory in the object directory, where we really need
 #   it.
 
 $(CURDIR)/$(MDDEPDIR):
-	@if test ! -d $@; then echo Creating $@; rm -rf $@; mkdir $@; else true; fi
+	$(MKDIR) -p $@
 
 ifneq (,$(filter-out all chrome default export realchrome tools clean clobber clobber_all distclean realclean,$(MAKECMDGOALS)))
 ifneq (,$(OBJS)$(XPIDLSRCS)$(SIMPLE_PROGRAMS))
 MDDEPEND_FILES		:= $(strip $(wildcard $(MDDEPDIR)/*.pp))
 
 ifneq (,$(MDDEPEND_FILES))
 # The script mddepend.pl checks the dependencies and writes to stdout
 # one rule to force out-of-date objects. For example,