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Re: [v4, with help] Re: run one test


Latest iteration...

>From b8c545e96f32420a1ebab0056e0a4b5dfe19cc1b Mon Sep 17 00:00:00 2001
From: DJ Delorie <dj@redhat.com>
Date: Mon, 30 Sep 2019 16:04:52 -0400
Subject: Add run-one-test convenience target and makefile help text

Adds "make test" for re-running just one test.  Also adds
"make help" for help with our Makefile targets, and adds a
mini-help when you just run "make".

diff --git a/Makefile b/Makefile
index 67ddd01bfe..1f3e088408 100644
--- a/Makefile
+++ b/Makefile
@@ -26,8 +26,17 @@ include Makeconfig
 
 
 # This is the default target; it makes everything except the tests.
-.PHONY: all
-all: lib others
+.PHONY: all help minihelp
+all: minihelp lib others
+
+help:
+	@sed '0,/^help-starts-here$$/d' Makefile.help
+
+minihelp:
+	@echo
+	@echo type \"make help\" for help with common glibc makefile targets
+	@echo
+
 
 ifneq ($(AUTOCONF),no)
 
@@ -499,3 +508,12 @@ FORCE:
 
 iconvdata/% localedata/% po/%: FORCE
 	$(MAKE) $(PARALLELMFLAGS) -C $(@D) $(@F)
+
+# Convenience target to rerun one test, from the top of the build tree
+# Example: make test t=wcsmbs/test-wcsnlen
+.PHONY: test
+test :
+	@-rm -f $(objpfx)$t.out
+	$(MAKE) subdir=$(dir $t) -C $(dir $t) ..=../ $(objpfx)$t.out
+	@cat $(objpfx)$t.test-result
+	@cat $(objpfx)$t.out
diff --git a/Makefile.help b/Makefile.help
new file mode 100644
index 0000000000..49815e9b9e
--- /dev/null
+++ b/Makefile.help
@@ -0,0 +1,42 @@
+# Copyright (C) 2019 Free Software Foundation, Inc.
+# This file is part of the GNU C Library.
+
+# The GNU C Library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+
+# The GNU C Library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+
+# You should have received a copy of the GNU Lesser General Public
+# License along with the GNU C Library; if not, see
+# <https://www.gnu.org/licenses/>.
+
+This is the file that gets printed when the user runs "make help",
+starting just after the "help-starts-here" line.
+
+help-starts-here
+
+all
+	The usual default; builds everything but doesn't run the
+	tests.
+
+check (or tests)
+	Runs the standard set of tests.
+
+test
+	Runs one test.  Use like this:
+		make test t=wcsmbs/test-wcsnlen
+	Note that this will rebuild the test if needed, but will not
+	rebuild what "make all" would have rebuilt.
+
+--
+Other useful hints:
+
+$ rm $(objpfx)testroot.pristine/install.stamp
+	Forces the testroot to be reinstalled the next time you run
+	the testsuite (or just rm -rf testroot.pristine)
+


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