Reinstate ftime and add deprecate message on ftime usage

This patch revert "Move ftime to a compatibility symbol" (commit
14633d3e56).

Checked on x86_64-linux-gnu and i686-linux-gnu.

include/sys/timeb.h

@@ -0,0 +1 @@
+#include <time/sys/timeb.h>

sysdeps/unix/sysv/linux/riscv/rv32/libc.abilist

@@ -795,6 +795,7 @@ GLIBC_2.33 fsync F
 GLIBC_2.33 ftell F
 GLIBC_2.33 ftello F
 GLIBC_2.33 ftello64 F
+GLIBC_2.33 ftime F
 GLIBC_2.33 ftok F
 GLIBC_2.33 ftruncate F
 GLIBC_2.33 ftruncate64 F

time/Makefile

@@ -22,7 +22,7 @@ subdir	:= time
 
 include ../Makeconfig
 
-headers := time.h sys/time.h bits/time.h				\
+headers := time.h sys/time.h sys/timeb.h bits/time.h			\
 	   bits/types/clockid_t.h bits/types/clock_t.h			\
 	   bits/types/struct_itimerspec.h				\
 	   bits/types/struct_timespec.h bits/types/struct_timeval.h	\
@@ -45,10 +45,9 @@ aux :=	    era alt_digit lc-time-cleanup
 tests	:= test_time clocktest tst-posixtz tst-strptime tst_wcsftime \
 	   tst-getdate tst-mktime tst-mktime2 tst-ftime_l tst-strftime \
 	   tst-mktime3 tst-strptime2 bug-asctime bug-asctime_r bug-mktime1 \
-	   tst-strptime3 bug-getdate1 tst-strptime-whitespace \
+	   tst-strptime3 bug-getdate1 tst-strptime-whitespace tst-ftime \
 	   tst-tzname tst-y2039 bug-mktime4 tst-strftime2 tst-strftime3 \
 	   tst-clock tst-clock2 tst-clock_nanosleep tst-cpuclock1
-tests-internal := tst-ftime
 
 include ../Rules
 

time/ftime.c

@@ -16,23 +16,12 @@
    License along with the GNU C Library; if not, see
    <https://www.gnu.org/licenses/>.  */
 
-#include <shlib-compat.h>
+#include <features.h>
-
+#include <sys/timeb.h>
-#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_33)
-
 #include <time.h>
 
-struct timeb
-  {
-    time_t time;		/* Seconds since epoch, as from `time'.  */
-    unsigned short int millitm;	/* Additional milliseconds.  */
-    short int timezone;		/* Minutes west of GMT.  */
-    short int dstflag;		/* Nonzero if Daylight Savings Time used.  */
-  };
-
 int
-attribute_compat_text_section
+ftime (struct timeb *timebuf)
-__ftime (struct timeb *timebuf)
 {
   struct timespec ts;
   __clock_gettime (CLOCK_REALTIME, &ts);
@@ -43,6 +32,3 @@ __ftime (struct timeb *timebuf)
   timebuf->dstflag = 0;
   return 0;
 }
-
-compat_symbol (libc, __ftime, ftime, GLIBC_2_0);
-#endif

time/sys/timeb.h

@@ -0,0 +1,45 @@
+/* Copyright (C) 1994-2020 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/>.  */
+
+#ifndef _SYS_TIMEB_H
+#define _SYS_TIMEB_H	1
+
+#include <features.h>
+
+#include <bits/types/time_t.h>
+
+__BEGIN_DECLS
+
+/* Structure returned by the `ftime' function.  */
+
+struct timeb
+  {
+    time_t time;		/* Seconds since epoch, as from `time'.  */
+    unsigned short int millitm;	/* Additional milliseconds.  */
+    short int timezone;		/* Minutes west of GMT.  */
+    short int dstflag;		/* Nonzero if Daylight Savings Time used.  */
+  };
+
+/* Fill in TIMEBUF with information about the current time.  */
+
+extern int ftime (struct timeb *__timebuf)
+  __nonnull ((1))
+  __attribute_deprecated_msg__ ("Use gettimeofday or clock_gettime instead");
+
+__END_DECLS
+
+#endif	/* sys/timeb.h */

time/tst-ftime.c

@@ -16,24 +16,12 @@
    License along with the GNU C Library; if not, see
    <https://www.gnu.org/licenses/>.  */
 
+#include <features.h>
+#include <sys/timeb.h>
+#include <libc-diag.h>
 
-#include <shlib-compat.h>
-#if TEST_COMPAT (libc, GLIBC_2_0, GLIBC_2_33)
-#include <time.h>
 #include <support/check.h>
 
-compat_symbol_reference (libc, ftime, ftime, GLIBC_2_0);
-
-struct timeb
-  {
-    time_t time;
-    unsigned short int millitm;
-    short int timezone;
-    short int dstflag;
-  };
-
-extern int ftime (struct timeb *__timebuf);
-
 static int
 do_test (void)
 {
@@ -44,23 +32,23 @@ do_test (void)
     {
       prev = curr;
 
-      /* ftime was deprecated on 2.31 and removed on 2.33.  */
+      /* ftime was deprecated on 2.31.  */
+      DIAG_PUSH_NEEDS_COMMENT;
+      DIAG_IGNORE_NEEDS_COMMENT (4.9, "-Wdeprecated-declarations");
+
       TEST_COMPARE (ftime (&curr), 0);
-      TEST_VERIFY_EXIT (curr.time >= prev.time);
+
+      DIAG_POP_NEEDS_COMMENT;
+
+      TEST_VERIFY (curr.time >= prev.time);
+
       if (curr.time == prev.time)
-	TEST_VERIFY_EXIT (curr.millitm >= prev.millitm);
+	TEST_VERIFY (curr.millitm >= prev.millitm);
 
       if (curr.time > prev.time)
         sec ++;
     }
   return 0;
 }
-#else
-static int
-do_test (void)
-{
-  return EXIT_UNSUPPORTED;
-}
-#endif
 
 #include <support/test-driver.c>