Merge from Gnulib

This incorporates:
2018-01-05 maint: Add encoding marker for Emacs to non-ASCII sources
2018-01-04 update-copyright: Handle use of ©
2018-01-04 pthread_sigmask: Avoid compilation error on mingw
2018-01-02 stat-time: silence -Wunused-parameter regression
* build-aux/config.guess, build-aux/config.sub:
* build-aux/update-copyright, doc/misc/texinfo.tex, lib/gnulib.mk.in:
* lib/md5.c, lib/md5.h, lib/sha1.c, lib/sha1.h, lib/sha256.c:
* lib/sha256.h, lib/sha512.c, lib/sha512.h, lib/signal.in.h:
* lib/stat-time.h: Copy from Gnulib, or regenerate.

11 files changed, 60 insertions, 9 deletions

diff --git a/lib/gnulib.mk.in b/lib/gnulib.mk.in
index ee9e6bd12e1..71c01e3e2a2 100644
--- a/lib/gnulib.mk.in
+++ b/lib/gnulib.mk.in
@@ -945,7 +945,6 @@ pdfdir = @pdfdir@
 prefix = @prefix@
 program_transform_name = @program_transform_name@
 psdir = @psdir@
-runstatedir = @runstatedir@
 sbindir = @sbindir@
 sharedstatedir = @sharedstatedir@
 srcdir = @srcdir@
diff --git a/lib/md5.c b/lib/md5.c
index 8bdd4a7884b..9dc915e2cf0 100644
--- a/lib/md5.c
+++ b/lib/md5.c
@@ -469,3 +469,10 @@ md5_process_block (const void *buffer, size_t len, struct md5_ctx *ctx)
   ctx->D = D;
 }
 #endif
+
+/*
+ * Hey Emacs!
+ * Local Variables:
+ * coding: utf-8
+ * End:
+ */
diff --git a/lib/md5.h b/lib/md5.h
index 4adfcdd9cfd..d89f819a97b 100644
--- a/lib/md5.h
+++ b/lib/md5.h
@@ -133,3 +133,10 @@ extern int __md5_stream (FILE *stream, void *resblock) __THROW;
 # endif
 
 #endif /* md5.h */
+
+/*
+ * Hey Emacs!
+ * Local Variables:
+ * coding: utf-8
+ * End:
+ */
diff --git a/lib/sha1.c b/lib/sha1.c
index 89a0f71e203..ce0f0b2e71f 100644
--- a/lib/sha1.c
+++ b/lib/sha1.c
@@ -434,3 +434,10 @@ sha1_process_block (const void *buffer, size_t len, struct sha1_ctx *ctx)
     }
 }
 #endif
+
+/*
+ * Hey Emacs!
+ * Local Variables:
+ * coding: utf-8
+ * End:
+ */
diff --git a/lib/sha1.h b/lib/sha1.h
index 62c507bbdf0..b1db15da1e7 100644
--- a/lib/sha1.h
+++ b/lib/sha1.h
@@ -98,3 +98,10 @@ extern int sha1_stream (FILE *stream, void *resblock);
 # endif
 
 #endif
+
+/*
+ * Hey Emacs!
+ * Local Variables:
+ * coding: utf-8
+ * End:
+ */
diff --git a/lib/sha256.c b/lib/sha256.c
index 2f28fcd7100..85405b20fdf 100644
--- a/lib/sha256.c
+++ b/lib/sha256.c
@@ -577,3 +577,10 @@ sha256_process_block (const void *buffer, size_t len, struct sha256_ctx *ctx)
     }
 }
 #endif
+
+/*
+ * Hey Emacs!
+ * Local Variables:
+ * coding: utf-8
+ * End:
+ */
diff --git a/lib/sha256.h b/lib/sha256.h
index ca06691241a..e3449864bb6 100644
--- a/lib/sha256.h
+++ b/lib/sha256.h
@@ -101,3 +101,10 @@ extern int sha224_stream (FILE *stream, void *resblock);
 # endif
 
 #endif
+
+/*
+ * Hey Emacs!
+ * Local Variables:
+ * coding: utf-8
+ * End:
+ */
diff --git a/lib/sha512.c b/lib/sha512.c
index d6a8ce181a1..8a6dd4e83ac 100644
--- a/lib/sha512.c
+++ b/lib/sha512.c
@@ -629,3 +629,10 @@ sha512_process_block (const void *buffer, size_t len, struct sha512_ctx *ctx)
     }
 }
 #endif
+
+/*
+ * Hey Emacs!
+ * Local Variables:
+ * coding: utf-8
+ * End:
+ */
diff --git a/lib/sha512.h b/lib/sha512.h
index 516e75b3013..6a0aadba02f 100644
--- a/lib/sha512.h
+++ b/lib/sha512.h
@@ -104,3 +104,10 @@ extern int sha384_stream (FILE *stream, void *resblock);
 # endif
 
 #endif
+
+/*
+ * Hey Emacs!
+ * Local Variables:
+ * coding: utf-8
+ * End:
+ */
diff --git a/lib/signal.in.h b/lib/signal.in.h
index 483413dc7f5..7d4927b828e 100644
--- a/lib/signal.in.h
+++ b/lib/signal.in.h
@@ -137,7 +137,7 @@ _GL_FUNCDECL_RPL (pthread_sigmask, int,
 _GL_CXXALIAS_RPL (pthread_sigmask, int,
                   (int how, const sigset_t *new_mask, sigset_t *old_mask));
 # else
-#  if !@HAVE_PTHREAD_SIGMASK@
+#  if !(@HAVE_PTHREAD_SIGMASK@ || defined pthread_sigmask)
 _GL_FUNCDECL_SYS (pthread_sigmask, int,
                   (int how, const sigset_t *new_mask, sigset_t *old_mask));
 #  endif
diff --git a/lib/stat-time.h b/lib/stat-time.h
index 5f8bf4e126f..104f5376682 100644
--- a/lib/stat-time.h
+++ b/lib/stat-time.h
@@ -102,15 +102,13 @@ get_stat_mtime_ns (struct stat const *st)
 
 /* Return the nanosecond component of *ST's birth time.  */
 _GL_STAT_TIME_INLINE long int _GL_ATTRIBUTE_PURE
-get_stat_birthtime_ns (struct stat const *st)
+get_stat_birthtime_ns (struct stat const *st _GL_UNUSED)
 {
 # if defined HAVE_STRUCT_STAT_ST_BIRTHTIMESPEC_TV_NSEC
   return STAT_TIMESPEC (st, st_birthtim).tv_nsec;
 # elif defined HAVE_STRUCT_STAT_ST_BIRTHTIMENSEC
   return STAT_TIMESPEC_NS (st, st_birthtim);
 # else
-  /* Avoid a "parameter unused" warning.  */
-  (void) st;
   return 0;
 # endif
 }
@@ -160,7 +158,7 @@ get_stat_mtime (struct stat const *st)
 /* Return *ST's birth time, if available; otherwise return a value
    with tv_sec and tv_nsec both equal to -1.  */
 _GL_STAT_TIME_INLINE struct timespec _GL_ATTRIBUTE_PURE
-get_stat_birthtime (struct stat const *st)
+get_stat_birthtime (struct stat const *st _GL_UNUSED)
 {
   struct timespec t;
 
@@ -184,8 +182,6 @@ get_stat_birthtime (struct stat const *st)
   /* Birth time is not supported.  */
   t.tv_sec = -1;
   t.tv_nsec = -1;
-  /* Avoid a "parameter unused" warning.  */
-  (void) st;
 #endif
 
 #if (defined HAVE_STRUCT_STAT_ST_BIRTHTIMESPEC_TV_NSEC \
@@ -212,7 +208,7 @@ get_stat_birthtime (struct stat const *st)
    errno to EOVERFLOW if normalization overflowed.  This function
    is intended to be private to this .h file.  */
 _GL_STAT_TIME_INLINE int
-stat_time_normalize (int result, struct stat *st)
+stat_time_normalize (int result, struct stat *st _GL_UNUSED)
 {
 #if defined __sun && defined STAT_TIMESPEC
   if (result == 0)