Add test-in-container infrastructure.

* Makefile (testroot.pristine): New rules to initialize the
test-in-container "testroot".
* Makerules (all-testsuite): Add tests-container.
* Rules (tests-expected): Add tests-container.
(binaries-all-tests): Likewise.
(tests-container): New, run these tests in the testroot container.
* support/Makefile (others): Add *-container, support_paths.c,
xmkdirp, and links-dso-program.
* support/links-dso-program-c.c: New.
* support/links-dso-program.cc: New.
* support/test-container.c: New.
* support/shell-container.c: New.
* support/echo-container.c: New.
* support/true-container.c: New.
* support/xmkdirp.c: New.
* support/xsymlink.c: New.
* support/support_paths.c: New.
* support/support.h: Add support paths prototypes.
* support/xunistd.h: Add xmkdirp () and xsymlink ().

* nss/tst-nss-test3.c: Convert to test-in-container.
* nss/tst-nss-test3.root/: New.

1 files changed, 56 insertions, 0 deletions

diff --git a/Makefile b/Makefile
index d3f25a525a..3df55e689a 100644
--- a/Makefile
+++ b/Makefile
@@ -340,6 +340,62 @@ define summarize-tests
 @! egrep -q -v '^(X?PASS|XFAIL|UNSUPPORTED):' $(objpfx)$1
 endef
 
+# The intention here is to do ONE install of our build into the
+# testroot.pristine/ directory, then rsync (internal to
+# support/test-container) that to testroot.root/ at the start of each
+# test.  That way we can promise each test a "clean" install, without
+# having to do the install for each test.
+#
+# In addition, we have to copy some files (which we build) into this
+# root in addition to what glibc installs.  For example, many tests
+# require additional programs including /bin/sh, /bin/true, and
+# /bin/echo, all of which we build below to limit library dependencies
+# to just those things in glibc and language support libraries which
+# we also copy into the into the rootfs.  To determine what language
+# support libraries we need we build a "test" program in either C or
+# (if available) C++ just so we can copy in any shared objects
+# (which we do not build) that GCC-compiled programs depend on.
+
+
+ifeq (,$(CXX))
+LINKS_DSO_PROGRAM = links-dso-program-c
+else
+LINKS_DSO_PROGRAM = links-dso-program
+endif
+
+$(tests-container) $(addsuffix /tests,$(subdirs)) : \
+		$(objpfx)testroot.pristine/install.stamp
+$(objpfx)testroot.pristine/install.stamp :
+	test -d $(objpfx)testroot.pristine || \
+	  mkdir $(objpfx)testroot.pristine
+	# We need a working /bin/sh for some of the tests.
+	test -d $(objpfx)testroot.pristine/bin || \
+	  mkdir $(objpfx)testroot.pristine/bin
+	cp $(objpfx)support/shell-container $(objpfx)testroot.pristine/bin/sh
+	cp $(objpfx)support/echo-container $(objpfx)testroot.pristine/bin/echo
+	cp $(objpfx)support/true-container $(objpfx)testroot.pristine/bin/true
+	# Copy these DSOs first so we can overwrite them with our own.
+	for dso in `$(test-wrapper-env) LD_TRACE_LOADED_OBJECTS=1  \
+		$(objpfx)elf/$(rtld-installed-name) \
+		$(objpfx)testroot.pristine/bin/sh \
+	        | grep / | sed 's/^[^/]*//' | sed 's/ .*//'` ;\
+	  do \
+	    test -d `dirname $(objpfx)testroot.pristine$$dso` || \
+	      mkdir -p `dirname $(objpfx)testroot.pristine$$dso` ;\
+	    $(test-wrapper) cp $$dso $(objpfx)testroot.pristine$$dso ;\
+	  done
+	for dso in `$(test-wrapper-env) LD_TRACE_LOADED_OBJECTS=1  \
+		$(objpfx)elf/$(rtld-installed-name) \
+		$(objpfx)support/$(LINKS_DSO_PROGRAM) \
+	        | grep / | sed 's/^[^/]*//' | sed 's/ .*//'` ;\
+	  do \
+	    test -d `dirname $(objpfx)testroot.pristine$$dso` || \
+	      mkdir -p `dirname $(objpfx)testroot.pristine$$dso` ;\
+	    $(test-wrapper) cp $$dso $(objpfx)testroot.pristine$$dso ;\
+	  done
+	$(MAKE) install DESTDIR=$(objpfx)testroot.pristine
+	touch $(objpfx)testroot.pristine/install.stamp
+
 tests-special-notdir = $(patsubst $(objpfx)%, %, $(tests-special))
 tests: $(tests-special)
 	$(..)scripts/merge-test-results.sh -s $(objpfx) "" \