support: Introduce new subdirectory for test infrastructure

The new test driver in <support/test-driver.c> has feature parity with
the old one.  The main difference is that its hooking mechanism is
based on functions and function pointers instead of macros.  This
commit also implements a new environment variable, TEST_COREDUMPS,
which disables the code which disables coredumps (that is, it enables
them if the invocation environment has not disabled them).

<test-skeleton.c> defines wrapper functions so that it is possible to
use existing macros with the new-style hook functionality.

This commit changes only a few test cases to the new test driver, to
make sure that it works as expected.

1 files changed, 53 insertions, 0 deletions

diff --git a/support/check.c b/support/check.c
new file mode 100644
index 0000000000..75fdf524b5
--- /dev/null
+++ b/support/check.c
@@ -0,0 +1,53 @@
+/* Support code for reporting test results.
+   Copyright (C) 2016 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
+   <http://www.gnu.org/licenses/>.  */
+
+#include <support/check.h>
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+static void
+print_failure (const char *file, int line, const char *format, va_list ap)
+{
+  printf ("error: %s:%d: ", file, line);
+  vprintf (format, ap);
+  puts ("");
+}
+
+int
+support_print_failure_impl (const char *file, int line,
+                            const char *format, ...)
+{
+  va_list ap;
+  va_start (ap, format);
+  print_failure (file, line, format, ap);
+  va_end (ap);
+  return 1;
+}
+
+void
+support_exit_failure_impl (int status, const char *file, int line,
+                           const char *format, ...)
+{
+  va_list ap;
+  va_start (ap, format);
+  print_failure (file, line, format, ap);
+  va_end (ap);
+  exit (status);
+}