diff -r 80eb6eb57537 Makefile.pre.in
--- a/Makefile.pre.in	Sat Sep 03 11:01:53 2016 -0400
+++ b/Makefile.pre.in	Sun Sep 04 01:55:27 2016 +0800
@@ -486,7 +486,7 @@
 	$(MAKE) all CFLAGS_NODIST="$(CFLAGS) $(PGO_PROF_GEN_FLAG) @LTOFLAGS@" LDFLAGS="$(LDFLAGS) $(PGO_PROF_GEN_FLAG) @LTOFLAGS@" LIBS="$(LIBS)"
 
 run_profile_task:
-	: # FIXME: can't run for a cross build
+# FIXME: can't run for a cross build
 	$(LLVM_PROF_FILE) $(RUNSHARED) ./$(BUILDPYTHON) $(PROFILE_TASK) || true
 
 build_all_merge_profile:
@@ -510,7 +510,7 @@
 	    --base-directory $(realpath $(abs_builddir)) \
 	    --path $(realpath $(abs_srcdir)) \
 	    --output-file $(COVERAGE_INFO)
-	: # remove 3rd party modules and system headers
+# remove 3rd party modules and system headers
 	@lcov --remove $(COVERAGE_INFO) \
 	    '*/Modules/_ctypes/libffi*/*' \
 	    '*/Modules/_decimal/libmpdec/*' \
@@ -527,15 +527,15 @@
 	@echo
 
 coverage-report:
-	: # force rebuilding of parser and importlib
+# force rebuilding of parser and importlib
 	@touch $(GRAMMAR_INPUT)
 	@touch $(srcdir)/Lib/importlib/_bootstrap.py
 	@touch $(srcdir)/Lib/importlib/_bootstrap_external.py
-	: # build with coverage info
+# build with coverage info
 	$(MAKE) coverage
-	: # run tests, ignore failures
+# run tests, ignore failures
 	$(TESTRUNNER) $(TESTOPTS) || true
-	: # build lcov report
+# build lcov report
 	$(MAKE) coverage-lcov
 
 # Run "Argument Clinic" over all source files
@@ -560,8 +560,8 @@
 # or removed in case of failure.
 pybuilddir.txt: $(BUILDPYTHON)
 	@echo "none" > ./pybuilddir.txt
-	$(RUNSHARED) $(PYTHON_FOR_BUILD) -S -m sysconfig --generate-posix-vars ;\
-	if test $$? -ne 0 ; then \
+	$(RUNSHARED) $(PYTHON_FOR_BUILD) -S -m sysconfig --generate-posix-vars
+	@if test $$? -ne 0 ; then \
 		echo "generate-posix-vars failed" ; \
 		rm -f ./pybuilddir.txt ; \
 		exit 1 ; \
@@ -1329,15 +1329,15 @@
 	cd $(srcdir)/Lib/$(PLATDIR); $(RUNSHARED) ./regen
 
 python-config: $(srcdir)/Misc/python-config.in Misc/python-config.sh
-	# Substitution happens here, as the completely-expanded BINDIR
-	# is not available in configure
+# Substitution happens here, as the completely-expanded BINDIR
+# is not available in configure
 	sed -e "s,@EXENAME@,$(BINDIR)/python$(LDVERSION)$(EXE)," < $(srcdir)/Misc/python-config.in >python-config.py
-	# Replace makefile compat. variable references with shell script compat. ones; $(VAR) -> ${VAR}
+# Replace makefile compat. variable references with shell script compat. ones; $(VAR) -> ${VAR}
 	sed -e 's,\$$(\([A-Za-z0-9_]*\)),\$$\{\1\},g' < Misc/python-config.sh >python-config
-	# On Darwin, always use the python version of the script, the shell
-	# version doesn't use the compiler customizations that are provided
-	# in python (_osx_support.py).
-	if test `uname -s` = Darwin; then \
+# On Darwin, always use the python version of the script, the shell
+# version doesn't use the compiler customizations that are provided
+# in python (_osx_support.py).
+	@if test `uname -s` = Darwin; then \
 		cp python-config.py python-config; \
 	fi