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, 2 insertions, 1 deletions

diff --git a/Makerules b/Makerules
index a10a0b4d70..5d6434c74b 100644
--- a/Makerules
+++ b/Makerules
@@ -1369,7 +1369,8 @@ xcheck: xtests
 # The only difference between MODULE_NAME=testsuite and MODULE_NAME=nonlib is
 # that almost all internal declarations from config.h, libc-symbols.h, and
 # include/*.h are not available to 'testsuite' code, but are to 'nonlib' code.
-all-testsuite := $(strip $(tests) $(xtests) $(test-srcs) $(test-extras))
+all-testsuite := $(strip $(tests) $(xtests) $(test-srcs) $(test-extras) \
+		 $(tests-container))
 ifneq (,$(all-testsuite))
 cpp-srcs-left = $(all-testsuite)
 lib := testsuite