Obsolete p_secstodate.

This patch, relative to a tree with
<https://sourceware.org/ml/libc-alpha/2017-11/msg00797.html> (pending
review) applied, obsoletes p_secstodate, making the underlying
function __p_secstodate into a compat symbol not available for new
binaries or ports.  The calls in ns_print.c (part of incomplete
handling of TKEY) are changed to use %lu to print times instead of
trying to pretty-print the times any more.

Tested for x86_64.

	* resolv/res_debug.c (p_secstodate): Condition definition on
	[SHLIB_COMPAT (libresolv, GLIBC_2_0, GLIBC_2_27)].  Define
	directly as __p_secstodate, and as a compat symbol.  Do not use
	libresolv_hidden_def.
	* resolv/resolv.h (p_secstodate): Remove macro and function
	declaration.
	* resolv/ns_print.c (ns_sprintrrf): Print times with %lu, not
	using p_secstodate.
	* include/resolv.h (__p_secstodate): Do not use
	libresolv_hidden_proto.
	* resolv/Makefile (tests): Move tst-p_secstodate to ....
	(tests-internal): ... here.
	* resolv/tst-p_secstodate.c: Include <shlib-compat.h>.  Condition
	all contents on [TEST_COMPAT (libresolv, GLIBC_2_0, GLIBC_2_27)]
	and declare and use __p_secstodate and use compat_symbol_reference
	in that case.
	[!TEST_COMPAT (libresolv, GLIBC_2_0, GLIBC_2_27)] (do_test): Add
	implementation returning 77.

1 files changed, 22 insertions, 5 deletions

diff --git a/resolv/tst-p_secstodate.c b/resolv/tst-p_secstodate.c
index 9dac1ad819..98e4d1f108 100644
--- a/resolv/tst-p_secstodate.c
+++ b/resolv/tst-p_secstodate.c
@@ -1,4 +1,4 @@
-/* Test p_secstodate.
+/* Test __p_secstodate compat symbol.
    Copyright (C) 2017 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
@@ -23,9 +23,16 @@
 #include <stdio.h>
 #include <string.h>
 
+#include <shlib-compat.h>
+
+#if TEST_COMPAT (libresolv, GLIBC_2_0, GLIBC_2_27)
+
+char *__p_secstodate (unsigned long int);
+compat_symbol_reference (libresolv, __p_secstodate, __p_secstodate, GLIBC_2_0);
+
 struct test
 {
-  /* Argument to p_secstodate.  */
+  /* Argument to __p_secstodate.  */
   unsigned long int in;
   /* Expected output.  */
   const char *out;
@@ -39,12 +46,12 @@ static const struct test tests[] =
     { 2147483647UL, "20380119031407" },
     { 2147483648UL, "<overflow>" },
     { 4294967295UL, "<overflow>" },
-#if ULONG_MAX > 0xffffffffUL
+# if ULONG_MAX > 0xffffffffUL
     { 4294967296UL, "<overflow>" },
     { 9999999999UL, "<overflow>" },
     { LONG_MAX, "<overflow>" },
     { ULONG_MAX, "<overflow>" },
-#endif
+# endif
   };
 
 static int
@@ -53,7 +60,7 @@ do_test (void)
   int ret = 0;
   for (size_t i = 0; i < array_length (tests); i++)
     {
-      char *p = p_secstodate (tests[i].in);
+      char *p = __p_secstodate (tests[i].in);
       printf ("Test %zu: %lu -> %s\n", i, tests[i].in, p);
       if (strcmp (p, tests[i].out) != 0)
 	{
@@ -64,4 +71,14 @@ do_test (void)
   return ret;
 }
 
+#else
+
+static int
+do_test (void)
+{
+  return 77;
+}
+
+#endif
+
 #include <support/test-driver.c>