; Update from Gnulib

* lib/boot-time-aux.h (get_linux_uptime):
* lib/boot-time.c (UT_USER):
* lib/nproc.c (num_processors_ignoring_omp):
* lib/readutmp.h (WTMP_FILE):
* m4/readutmp.m4 (gl_READUTMP):
* m4/stdint.m4: Update from Gnulib.

lib/boot-time-aux.h

@@ -65,6 +65,7 @@ get_linux_uptime (struct timespec *p_uptime)
     }
 # endif
 
+# if HAVE_DECL_SYSINFO /* not available in Android API < 9 */
   /* The sysinfo call returns the uptime with a resolution of 1 sec only.  */
   struct sysinfo info;
   if (sysinfo (&info) >= 0)
@@ -73,6 +74,7 @@ get_linux_uptime (struct timespec *p_uptime)
       p_uptime->tv_nsec = 0;
       return 0;
     }
+# endif
 
   return -1;
 }

lib/boot-time.c

@@ -32,7 +32,7 @@
 # include <time.h>
 #endif
 
-#if HAVE_SYS_SYSCTL_H && !defined __minix
+#if HAVE_SYS_SYSCTL_H && !(defined __GLIBC__ && defined __linux__) && !defined __minix
 # if HAVE_SYS_PARAM_H
 #  include <sys/param.h>
 # endif
@@ -65,8 +65,10 @@
 # define UT_USER(UT) ((UT)->ut_user)
 #endif
 
-#if !HAVE_UTMPX_H && HAVE_UTMP_H && defined UTMP_NAME_FUNCTION && !HAVE_DECL_GETUTENT
-struct utmp *getutent (void);
+#if !HAVE_UTMPX_H && HAVE_UTMP_H && defined UTMP_NAME_FUNCTION
+# if !HAVE_DECL_ENDUTENT /* Android */
+void endutent (void);
+# endif
 #endif
 
 #if defined __linux__ || HAVE_UTMPX_H || HAVE_UTMP_H || defined __CYGWIN__ || defined _WIN32

lib/nproc.c

@@ -46,7 +46,7 @@
 # include <sys/param.h>
 #endif
 
-#if HAVE_SYS_SYSCTL_H && ! defined __GLIBC__
+#if HAVE_SYS_SYSCTL_H && !(defined __GLIBC__ && defined __linux__)
 # include <sys/sysctl.h>
 #endif
 
@@ -306,7 +306,7 @@ num_processors_ignoring_omp (enum nproc_query query)
   /* Finally, as fallback, use the APIs that don't distinguish between
      NPROC_CURRENT and NPROC_ALL.  */
 
-#if HAVE_SYSCTL && ! defined __GLIBC__ && defined HW_NCPU
+#if HAVE_SYSCTL && !(defined __GLIBC__ && defined __linux__) && defined HW_NCPU
   { /* This works on macOS, FreeBSD, NetBSD, OpenBSD.
        macOS 10.14 does not allow mib to be const.  */
     int nprocs;

lib/readutmp.h

@@ -249,6 +249,13 @@ struct utmpx32
 # define WTMP_FILE "/etc/wtmp"
 #endif
 
+/* In early versions of Android, <utmp.h> did not define BOOT_TIME, only
+   USER_PROCESS.  We need to use the value that is defined in newer versions
+   of Android.  */
+#if defined __ANDROID__ && !defined BOOT_TIME
+# define BOOT_TIME 2
+#endif
+
 /* Some platforms, such as OpenBSD, don't have an ut_type field and don't have
    the BOOT_TIME and USER_PROCESS macros.  But we want to support them in
    'struct gl_utmp'.  */

m4/readutmp.m4

@@ -1,4 +1,4 @@
-# readutmp.m4 serial 28
+# readutmp.m4 serial 30
 dnl Copyright (C) 2002-2023 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -55,7 +55,7 @@ AC_DEFUN_ONCE([gl_PREREQ_READUTMP_H],
   if test $ac_cv_header_utmp_h = yes || test $ac_cv_header_utmpx_h = yes; then
     dnl Prerequisites of lib/readutmp.h and lib/readutmp.c.
     AC_CHECK_FUNCS_ONCE([utmpname utmpxname])
-    AC_CHECK_DECLS([getutent],,,[[
+    AC_CHECK_DECLS([endutent],,,[[
 /* <sys/types.h> is a prerequisite of <utmp.h> on FreeBSD 8.0, OpenBSD 4.6.  */
 #include <sys/types.h>
 #ifdef HAVE_UTMP_H
@@ -103,6 +103,10 @@ AC_INCLUDES_DEFAULT
     AC_CHECK_MEMBERS([struct utmp.ut_exit.e_termination],,,[$utmp_includes])
   fi
 
+  AC_CHECK_DECLS([sysinfo],,,[[
+    #include <sys/sysinfo.h>
+    ]])
+
   AC_CHECK_HEADERS_ONCE([sys/param.h])
   dnl <sys/sysctl.h> requires <sys/param.h> on OpenBSD 4.0.
   AC_CHECK_HEADERS([sys/sysctl.h],,,

m4/stdint.m4

@@ -1,4 +1,4 @@
-# stdint.m4 serial 61
+# stdint.m4 serial 62
 dnl Copyright (C) 2001-2023 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -150,7 +150,10 @@ intmax_t i = INTMAX_MAX;
 uintmax_t j = UINTMAX_MAX;
 
 /* Check that SIZE_MAX has the correct type, if possible.  */
-#if 201112 <= __STDC_VERSION__
+/* ISO C 11 mandates _Generic, but GCC versions < 4.9 lack it.  */
+#if 201112 <= __STDC_VERSION__ \
+    && (!defined __GNUC__ || 4 < __GNUC__ + (9 <= __GNUC_MINOR__) \
+        || defined __clang__)
 int k = _Generic (SIZE_MAX, size_t: 0);
 #elif (2 <= __GNUC__ || 4 <= __clang_major__ || defined __IBM__TYPEOF__ \
        || (0x5110 <= __SUNPRO_C && !__STDC__))