Update from Gnulib

This incorporates:
2019-07-06 thread, lock, cond, tls: Remove support for Pth threads
2019-07-02 verify: document ‘assume’ better
2019-06-30 Include <stdlib.h> when needed
2019-06-30 inet_ntop, inet_pton: Avoid conflict with native Windows
* build-aux/config.sub, lib/faccessat.c, lib/fcntl.c, lib/fstatat.c:
* lib/readlinkat.c, lib/verify.h, m4/pthread_sigmask.m4:
* m4/sys_socket_h.m4: Copy from Gnulib.
* lib/gnulib.mk.in: Regenerate.

6 files changed, 14 insertions, 5 deletions

diff --git a/lib/faccessat.c b/lib/faccessat.c
index 6c63e61d83f..e8e581a54b5 100644
--- a/lib/faccessat.c
+++ b/lib/faccessat.c
@@ -22,9 +22,12 @@
 #define _GL_INCLUDING_UNISTD_H
 #include <config.h>
 
+/* Specification.  */
 #include <unistd.h>
+
 #include <errno.h>
 #include <fcntl.h>
+#include <stdlib.h>
 #include <string.h>
 #include <sys/stat.h>
 #undef _GL_INCLUDING_UNISTD_H
diff --git a/lib/fcntl.c b/lib/fcntl.c
index 51f62ef78a8..a3ffaa6e47b 100644
--- a/lib/fcntl.c
+++ b/lib/fcntl.c
@@ -25,6 +25,7 @@
 #include <errno.h>
 #include <limits.h>
 #include <stdarg.h>
+#include <stdlib.h>
 #include <unistd.h>
 
 #ifdef __KLIBC__
diff --git a/lib/fstatat.c b/lib/fstatat.c
index 019d3c61638..db864da7605 100644
--- a/lib/fstatat.c
+++ b/lib/fstatat.c
@@ -49,6 +49,7 @@ orig_fstatat (int fd, char const *filename, struct stat *buf, int flags)
 
 #include <errno.h>
 #include <fcntl.h>
+#include <stdlib.h>
 #include <string.h>
 
 #if HAVE_FSTATAT && HAVE_WORKING_FSTATAT_ZERO_FLAG
diff --git a/lib/gnulib.mk.in b/lib/gnulib.mk.in
index 6f978aeb0cc..85fdbd2df6f 100644
--- a/lib/gnulib.mk.in
+++ b/lib/gnulib.mk.in
@@ -1077,7 +1077,6 @@ gl_GNULIB_ENABLED_getdtablesize = @gl_GNULIB_ENABLED_getdtablesize@
 gl_GNULIB_ENABLED_getgroups = @gl_GNULIB_ENABLED_getgroups@
 gl_GNULIB_ENABLED_malloca = @gl_GNULIB_ENABLED_malloca@
 gl_GNULIB_ENABLED_open = @gl_GNULIB_ENABLED_open@
-gl_GNULIB_ENABLED_pathmax = @gl_GNULIB_ENABLED_pathmax@
 gl_GNULIB_ENABLED_strtoll = @gl_GNULIB_ENABLED_strtoll@
 gl_LIBOBJS = @gl_LIBOBJS@
 gl_LTLIBOBJS = @gl_LTLIBOBJS@
diff --git a/lib/readlinkat.c b/lib/readlinkat.c
index c0f3e59f6ce..069411690d6 100644
--- a/lib/readlinkat.c
+++ b/lib/readlinkat.c
@@ -18,8 +18,11 @@
 
 #include <config.h>
 
-#include <errno.h>
+/* Specification.  */
 #include <unistd.h>
+
+#include <errno.h>
+#include <stdlib.h>
 #include <string.h>
 #include <sys/stat.h>
 
diff --git a/lib/verify.h b/lib/verify.h
index f8e4eff026d..9b8e1ed20fa 100644
--- a/lib/verify.h
+++ b/lib/verify.h
@@ -259,9 +259,11 @@ template <int w>
 # define __has_builtin(x) 0
 #endif
 
-/* Assume that R always holds.  This lets the compiler optimize
-   accordingly.  R should not have side-effects; it may or may not be
-   evaluated.  Behavior is undefined if R is false.  */
+/* Assume that R always holds.  Behavior is undefined if R is false,
+   fails to evaluate, or has side effects.  Although assuming R can
+   help a compiler generate better code or diagnostics, performance
+   can suffer if R uses hard-to-optimize features such as function
+   calls not inlined by the compiler.  */
 
 #if (__has_builtin (__builtin_unreachable) \
      || 4 < __GNUC__ + (5 <= __GNUC_MINOR__))