7 files changed, 138 insertions, 79 deletions

diff --git a/lib/gnulib.mk b/lib/gnulib.mk
index 4341a5d184d..5163269db41 100644
--- a/lib/gnulib.mk
+++ b/lib/gnulib.mk
@@ -9,7 +9,7 @@
 # the same distribution terms as the rest of that program.
 #
 # Generated by gnulib-tool.
-# Reproduce by: gnulib-tool --import --dir=. --lib=libgnu --source-base=lib --m4-base=m4 --doc-base=doc --tests-base=tests --aux-dir=. --makefile-name=gnulib.mk --conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files alloca-opt careadlinkat crypto/md5 crypto/sha1 crypto/sha256 crypto/sha512 dtoastr dup2 filemode getloadavg getopt-gnu ignore-value intprops lstat mktime pthread_sigmask readlink socklen stdarg stdio strftime strtoimax strtoumax symlink sys_stat
+# Reproduce by: gnulib-tool --import --dir=. --lib=libgnu --source-base=lib --m4-base=m4 --doc-base=doc --tests-base=tests --aux-dir=build-aux --avoid=threadlib --makefile-name=gnulib.mk --conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files alloca-opt careadlinkat crypto/md5 crypto/sha1 crypto/sha256 crypto/sha512 dtoastr dup2 filemode getloadavg getopt-gnu ignore-value intprops lstat mktime pthread_sigmask readlink socklen stdarg stdio strftime strtoimax strtoumax symlink sys_stat
 
 
 MOSTLYCLEANFILES += core *.stackdump
@@ -52,54 +52,6 @@ EXTRA_DIST += allocator.h
 
 ## end   gnulib module allocator
 
-## begin gnulib module arg-nonnull
-
-# The BUILT_SOURCES created by this Makefile snippet are not used via #include
-# statements but through direct file reference. Therefore this snippet must be
-# present in all Makefile.am that need it. This is ensured by the applicability
-# 'all' defined above.
-
-BUILT_SOURCES += arg-nonnull.h
-# The arg-nonnull.h that gets inserted into generated .h files is the same as
-# build-aux/arg-nonnull.h, except that it has the copyright header cut off.
-arg-nonnull.h: $(top_srcdir)/./arg-nonnull.h
-        $(AM_V_GEN)rm -f $@-t $@ && \
-        sed -n -e '/GL_ARG_NONNULL/,$$p' \
-          < $(top_srcdir)/./arg-nonnull.h \
-          > $@-t && \
-        mv $@-t $@
-MOSTLYCLEANFILES += arg-nonnull.h arg-nonnull.h-t
-
-ARG_NONNULL_H=arg-nonnull.h
-
-EXTRA_DIST += $(top_srcdir)/./arg-nonnull.h
-
-## end   gnulib module arg-nonnull
-
-## begin gnulib module c++defs
-
-# The BUILT_SOURCES created by this Makefile snippet are not used via #include
-# statements but through direct file reference. Therefore this snippet must be
-# present in all Makefile.am that need it. This is ensured by the applicability
-# 'all' defined above.
-
-BUILT_SOURCES += c++defs.h
-# The c++defs.h that gets inserted into generated .h files is the same as
-# build-aux/c++defs.h, except that it has the copyright header cut off.
-c++defs.h: $(top_srcdir)/./c++defs.h
-        $(AM_V_GEN)rm -f $@-t $@ && \
-        sed -n -e '/_GL_CXXDEFS/,$$p' \
-          < $(top_srcdir)/./c++defs.h \
-          > $@-t && \
-        mv $@-t $@
-MOSTLYCLEANFILES += c++defs.h c++defs.h-t
-
-CXXDEFS_H=c++defs.h
-
-EXTRA_DIST += $(top_srcdir)/./c++defs.h
-
-## end   gnulib module c++defs
-
 ## begin gnulib module careadlinkat
 
 libgnu_a_SOURCES += careadlinkat.c
@@ -362,6 +314,87 @@ EXTRA_libgnu_a_SOURCES += sigprocmask.c
 
 ## end   gnulib module sigprocmask
 
+## begin gnulib module snippet/_Noreturn
+
+# Because this Makefile snippet defines a variable used by other
+# gnulib Makefile snippets, it must be present in all Makefile.am that
+# need it. This is ensured by the applicability 'all' defined above.
+
+_NORETURN_H=$(top_srcdir)/build-aux/snippet/_Noreturn.h
+
+EXTRA_DIST += $(top_srcdir)/build-aux/snippet/_Noreturn.h
+
+## end   gnulib module snippet/_Noreturn
+
+## begin gnulib module snippet/arg-nonnull
+
+# The BUILT_SOURCES created by this Makefile snippet are not used via #include
+# statements but through direct file reference. Therefore this snippet must be
+# present in all Makefile.am that need it. This is ensured by the applicability
+# 'all' defined above.
+
+BUILT_SOURCES += arg-nonnull.h
+# The arg-nonnull.h that gets inserted into generated .h files is the same as
+# build-aux/snippet/arg-nonnull.h, except that it has the copyright header cut
+# off.
+arg-nonnull.h: $(top_srcdir)/build-aux/snippet/arg-nonnull.h
+        $(AM_V_GEN)rm -f $@-t $@ && \
+        sed -n -e '/GL_ARG_NONNULL/,$$p' \
+          < $(top_srcdir)/build-aux/snippet/arg-nonnull.h \
+          > $@-t && \
+        mv $@-t $@
+MOSTLYCLEANFILES += arg-nonnull.h arg-nonnull.h-t
+
+ARG_NONNULL_H=arg-nonnull.h
+
+EXTRA_DIST += $(top_srcdir)/build-aux/snippet/arg-nonnull.h
+
+## end   gnulib module snippet/arg-nonnull
+
+## begin gnulib module snippet/c++defs
+
+# The BUILT_SOURCES created by this Makefile snippet are not used via #include
+# statements but through direct file reference. Therefore this snippet must be
+# present in all Makefile.am that need it. This is ensured by the applicability
+# 'all' defined above.
+
+BUILT_SOURCES += c++defs.h
+# The c++defs.h that gets inserted into generated .h files is the same as
+# build-aux/snippet/c++defs.h, except that it has the copyright header cut off.
+c++defs.h: $(top_srcdir)/build-aux/snippet/c++defs.h
+        $(AM_V_GEN)rm -f $@-t $@ && \
+        sed -n -e '/_GL_CXXDEFS/,$$p' \
+          < $(top_srcdir)/build-aux/snippet/c++defs.h \
+          > $@-t && \
+        mv $@-t $@
+MOSTLYCLEANFILES += c++defs.h c++defs.h-t
+
+CXXDEFS_H=c++defs.h
+
+EXTRA_DIST += $(top_srcdir)/build-aux/snippet/c++defs.h
+
+## end   gnulib module snippet/c++defs
+
+## begin gnulib module snippet/warn-on-use
+
+BUILT_SOURCES += warn-on-use.h
+# The warn-on-use.h that gets inserted into generated .h files is the same as
+# build-aux/snippet/warn-on-use.h, except that it has the copyright header cut
+# off.
+warn-on-use.h: $(top_srcdir)/build-aux/snippet/warn-on-use.h
+        $(AM_V_GEN)rm -f $@-t $@ && \
+        sed -n -e '/^.ifndef/,$$p' \
+          < $(top_srcdir)/build-aux/snippet/warn-on-use.h \
+          > $@-t && \
+        mv $@-t $@
+MOSTLYCLEANFILES += warn-on-use.h warn-on-use.h-t
+
+WARN_ON_USE_H=warn-on-use.h
+
+EXTRA_DIST += $(top_srcdir)/build-aux/snippet/warn-on-use.h
+
+## end   gnulib module snippet/warn-on-use
+
 ## begin gnulib module stat
 
 if gl_GNULIB_ENABLED_stat
@@ -634,7 +667,8 @@ BUILT_SOURCES += stdlib.h
 
 # We need the following in order to create <stdlib.h> when the system
 # doesn't have one that works with the given compiler.
-stdlib.h: stdlib.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H) $(WARN_ON_USE_H)
+stdlib.h: stdlib.in.h $(top_builddir)/config.status $(CXXDEFS_H) \
+  $(_NORETURN_H) $(ARG_NONNULL_H) $(WARN_ON_USE_H)
         $(AM_V_GEN)rm -f $@-t $@ && \
         { echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */' && \
           sed -e 's|@''GUARD_PREFIX''@|GL|g' \
@@ -708,6 +742,7 @@ stdlib.h: stdlib.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H
               -e 's|@''REPLACE_UNSETENV''@|$(REPLACE_UNSETENV)|g' \
               -e 's|@''REPLACE_WCTOMB''@|$(REPLACE_WCTOMB)|g' \
               -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+              -e '/definition of _Noreturn/r $(_NORETURN_H)' \
               -e '/definition of _GL_ARG_NONNULL/r $(ARG_NONNULL_H)' \
               -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)'; \
         } > $@-t && \
@@ -1040,25 +1075,6 @@ EXTRA_DIST += verify.h
 
 ## end   gnulib module verify
 
-## begin gnulib module warn-on-use
-
-BUILT_SOURCES += warn-on-use.h
-# The warn-on-use.h that gets inserted into generated .h files is the same as
-# build-aux/warn-on-use.h, except that it has the copyright header cut off.
-warn-on-use.h: $(top_srcdir)/./warn-on-use.h
-        $(AM_V_GEN)rm -f $@-t $@ && \
-        sed -n -e '/^.ifndef/,$$p' \
-          < $(top_srcdir)/./warn-on-use.h \
-          > $@-t && \
-        mv $@-t $@
-MOSTLYCLEANFILES += warn-on-use.h warn-on-use.h-t
-
-WARN_ON_USE_H=warn-on-use.h
-
-EXTRA_DIST += $(top_srcdir)/./warn-on-use.h
-
-## end   gnulib module warn-on-use
-
 
 mostlyclean-local: mostlyclean-generic
         @for dir in '' $(MOSTLYCLEANDIRS); do \
diff --git a/lib/lstat.c b/lib/lstat.c
index b26065ede28..29fc6d25f90 100644
--- a/lib/lstat.c
+++ b/lib/lstat.c
@@ -17,6 +17,10 @@
 
 /* written by Jim Meyering */
 
+/* If the user's config.h happens to include <sys/stat.h>, let it include only
+   the system's <sys/stat.h> here, so that orig_lstat doesn't recurse to
+   rpl_lstat.  */
+#define __need_system_sys_stat_h
 #include <config.h>
 
 #if !HAVE_LSTAT
@@ -27,7 +31,6 @@ typedef int dummy;
 #else /* HAVE_LSTAT */
 
 /* Get the original definition of lstat.  It might be defined as a macro.  */
-# define __need_system_sys_stat_h
 # include <sys/types.h>
 # include <sys/stat.h>
 # undef __need_system_sys_stat_h
diff --git a/lib/makefile.w32-in b/lib/makefile.w32-in
index df7f8e274f0..6b451dd14e1 100644
--- a/lib/makefile.w32-in
+++ b/lib/makefile.w32-in
@@ -213,7 +213,7 @@ INCLUDE_NEXT = include_next
 PRAGMA_SYSTEM_HEADER = \#pragma GCC system_header
 PRAGMA_COLUMNS =
 NEXT_GETOPT_H = <getopt.h>
-ARG_NONNULL_H = ../arg-nonnull.h
+ARG_NONNULL_H = ../build-aux/snippet/arg-nonnull.h
 
 getopt_h:
         - $(DEL) getopt_.h-t getopt_.h
diff --git a/lib/pthread_sigmask.c b/lib/pthread_sigmask.c
index 1f460f13c48..11d549cad41 100644
--- a/lib/pthread_sigmask.c
+++ b/lib/pthread_sigmask.c
@@ -20,10 +20,50 @@
 #include <signal.h>
 
 #include <errno.h>
+#include <stddef.h>
+
+#if PTHREAD_SIGMASK_UNBLOCK_BUG
+# include <unistd.h>
+#endif
 
 int
 pthread_sigmask (int how, const sigset_t *new_mask, sigset_t *old_mask)
+#undef pthread_sigmask
 {
+#if HAVE_PTHREAD_SIGMASK
+  int ret = pthread_sigmask (how, new_mask, old_mask);
+# if PTHREAD_SIGMASK_INEFFECTIVE
+  if (ret == 0)
+    {
+      /* Detect whether pthread_sigmask is currently ineffective.
+         Don't cache the information: libpthread.so could be dynamically
+         loaded after the program started and after pthread_sigmask was
+         called for the first time.  */
+      if (pthread_sigmask (1729, NULL, NULL) == 0)
+        {
+          /* pthread_sigmask is currently ineffective.  The program is not
+             linked to -lpthread.  So use sigprocmask instead.  */
+          return (sigprocmask (how, new_mask, old_mask) < 0 ? errno : 0);
+        }
+    }
+# endif
+# if PTHREAD_SIGMASK_FAILS_WITH_ERRNO
+  if (ret == -1)
+    return errno;
+# endif
+# if PTHREAD_SIGMASK_UNBLOCK_BUG
+  if (ret == 0
+      && new_mask != NULL
+      && (how == SIG_UNBLOCK || how == SIG_SETMASK))
+    {
+      /* Give the OS the opportunity to raise signals that were pending before
+         the pthread_sigmask call and have now been unblocked.  */
+      usleep (1);
+    }
+# endif
+  return ret;
+#else
   int ret = sigprocmask (how, new_mask, old_mask);
   return (ret < 0 ? errno : 0);
+#endif
 }
diff --git a/lib/stat.c b/lib/stat.c
index f07370dd06b..6c354d1d357 100644
--- a/lib/stat.c
+++ b/lib/stat.c
@@ -16,10 +16,13 @@
 
 /* written by Eric Blake */
 
+/* If the user's config.h happens to include <sys/stat.h>, let it include only
+   the system's <sys/stat.h> here, so that orig_stat doesn't recurse to
+   rpl_stat.  */
+#define __need_system_sys_stat_h
 #include <config.h>
 
 /* Get the original definition of stat.  It might be defined as a macro.  */
-#define __need_system_sys_stat_h
 #include <sys/types.h>
 #include <sys/stat.h>
 #undef __need_system_sys_stat_h
diff --git a/lib/stdlib.in.h b/lib/stdlib.in.h
index 62a2ce920e6..047fac18b83 100644
--- a/lib/stdlib.in.h
+++ b/lib/stdlib.in.h
@@ -89,11 +89,7 @@ struct random_data
 # include <unistd.h>
 #endif
 
-#if 3 <= __GNUC__ || __GNUC__ == 2 && 8 <= __GNUC_MINOR__
-# define _GL_ATTRIBUTE_NORETURN __attribute__ ((__noreturn__))
-#else
-# define _GL_ATTRIBUTE_NORETURN
-#endif
+/* The definition of _Noreturn is copied here.  */
 
 /* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
 
@@ -120,7 +116,7 @@ struct random_data
 /* Terminate the current process with the given return code, without running
    the 'atexit' handlers.  */
 # if !@HAVE__EXIT@
-_GL_FUNCDECL_SYS (_Exit, void, (int status) _GL_ATTRIBUTE_NORETURN);
+_GL_FUNCDECL_SYS (_Exit, _Noreturn void, (int status));
 # endif
 _GL_CXXALIAS_SYS (_Exit, void, (int status));
 _GL_CXXALIASWARN (_Exit);
diff --git a/lib/unistd.in.h b/lib/unistd.in.h
index 769ecf0d43f..119cd142f43 100644
--- a/lib/unistd.in.h
+++ b/lib/unistd.in.h
@@ -85,7 +85,8 @@
 /* mingw declares getcwd in <io.h>, not in <unistd.h>.  */
 #if ((@GNULIB_GETCWD@ || defined GNULIB_POSIXCHECK) \
      && ((defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__))
-# include <io.h>
+# include <io.h>     /* mingw32, mingw64 */
+# include <direct.h> /* mingw64 */
 #endif
 
 /* AIX and OSF/1 5.1 declare getdomainname in <netdb.h>, not in <unistd.h>.