Update from Gnulib

This incorporates:
2020-08-20 sigabbrev_np: New module
2020-08-20 stdalign: Fix 32-bit test failures clang versions < 8
2020-08-17 careadlinkat: speedup for GCC 10 with GCC_LINT
2020-08-17 Assume autoconf >= 2.64
* build-aux/config.guess, build-aux/config.sub, lib/careadlinkat.c:
* lib/stdalign.in.h, lib/string.in.h, m4/std-gnu11.m4, m4/string_h.m4:
Copy from Gnulib.
* lib/gnulib.mk.in: Regenerate.

1 files changed, 15 insertions, 0 deletions

diff --git a/lib/string.in.h b/lib/string.in.h
index 7d83668f6ec..5134e11289d 100644
--- a/lib/string.in.h
+++ b/lib/string.in.h
@@ -1045,6 +1045,21 @@ _GL_WARN_ON_USE (strerror_r, "strerror_r is unportable - "
 # endif
 #endif
 
+/* Return an abbreviation string for the signal number SIG.  */
+#if @GNULIB_SIGABBREV_NP@
+# if ! @HAVE_SIGABBREV_NP@
+_GL_FUNCDECL_SYS (sigabbrev_np, const char *, (int sig));
+# endif
+_GL_CXXALIAS_SYS (sigabbrev_np, const char *, (int sig));
+_GL_CXXALIASWARN (sigabbrev_np);
+#elif defined GNULIB_POSIXCHECK
+# undef sigabbrev_np
+# if HAVE_RAW_DECL_SIGABBREV_NP
+_GL_WARN_ON_USE (sigabbrev_np, "sigabbrev_np is unportable - "
+                 "use gnulib module sigabbrev_np for portability");
+# endif
+#endif
+
 #if @GNULIB_STRSIGNAL@
 # if @REPLACE_STRSIGNAL@
 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)