Update from Gnulib

This incorporates:
2018-04-27 manywarnings: port to GCC 8.0
* build-aux/config.sub, m4/manywarnings.m4: Copy from Gnulib.

2 files changed, 23 insertions, 9 deletions

diff --git a/build-aux/config.sub b/build-aux/config.sub
index 9ccf09a7a33..ba37cf99e26 100755
--- a/build-aux/config.sub
+++ b/build-aux/config.sub
@@ -2,7 +2,7 @@
 # Configuration validation subroutine script.
 #   Copyright 1992-2018 Free Software Foundation, Inc.
 
-timestamp='2018-03-08'
+timestamp='2018-04-24'
 
 # This file is free software; you can redistribute it and/or modify it
 # under the terms of the GNU General Public License as published by
@@ -249,12 +249,12 @@ case $basic_machine in
         | alpha64 | alpha64ev[4-8] | alpha64ev56 | alpha64ev6[78] | alpha64pca5[67] \
         | am33_2.0 \
         | arc | arceb \
-        | arm | arm[bl]e | arme[lb] | armv[2-8] | armv[3-8][lb] | armv7[arm] \
+        | arm | arm[bl]e | arme[lb] | armv[2-8] | armv[3-8][lb] | armv6m | armv[78][arm] \
         | avr | avr32 \
         | ba \
         | be32 | be64 \
         | bfin \
-        | c4x | c8051 | clipper \
+        | c4x | c8051 | clipper | csky \
         | d10v | d30v | dlx | dsp16xx \
         | e2k | epiphany \
         | fido | fr30 | frv | ft32 \
@@ -335,6 +335,10 @@ case $basic_machine in
                 ;;
         m88110 | m680[12346]0 | m683?2 | m68360 | m5200 | v70 | w65)
                 ;;
+        m9s12z | m68hcs12z | hcs12z | s12z)
+                basic_machine=s12z-unknown
+                os=-none
+                ;;
         ms1)
                 basic_machine=mt-unknown
                 ;;
@@ -378,7 +382,7 @@ case $basic_machine in
         | be32-* | be64-* \
         | bfin-* | bs2000-* \
         | c[123]* | c30-* | [cjt]90-* | c4x-* \
-        | c8051-* | clipper-* | craynv-* | cydra-* \
+        | c8051-* | clipper-* | craynv-* | csky-* | cydra-* \
         | d10v-* | d30v-* | dlx-* \
         | e2k-* | elxsi-* \
         | f30[01]-* | f700-* | fido-* | fr30-* | frv-* | fx80-* \
diff --git a/m4/manywarnings.m4 b/m4/manywarnings.m4
index 18249b8f2ea..60c0e4051cb 100644
--- a/m4/manywarnings.m4
+++ b/m4/manywarnings.m4
@@ -1,4 +1,4 @@
-# manywarnings.m4 serial 13
+# manywarnings.m4 serial 14
 dnl Copyright (C) 2008-2018 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -106,10 +106,9 @@ m4_defun([gl_MANYWARN_ALL_GCC(C)],
   # To compare this list to your installed GCC's, run this Bash command:
   #
   # comm -3 \
-  #  <(sed -n 's/^  *\(-[^ 0-9][^ ]*\) .*/\1/p' manywarnings.m4 | sort) \
-  #  <(gcc --help=warnings | sed -n 's/^  \(-[^ ]*\) .*/\1/p' | sort |
-  #      grep -v -x -F -f <(
-  #         awk '/^[^#]/ {print $1}' ../build-aux/gcc-warning.spec))
+  #  <((sed -n 's/^  *\(-[^ 0-9][^ ]*\) .*/\1/p' manywarnings.m4; \
+  #     awk '/^[^#]/ {print $1}' ../build-aux/gcc-warning.spec) | sort) \
+  #  <(gcc --help=warnings | sed -n 's/^  \(-[^ ]*\) .*/\1/p' | sort)
 
   gl_manywarn_set=
   for gl_manywarn_item in -fno-common \
@@ -118,6 +117,7 @@ m4_defun([gl_MANYWARN_ALL_GCC(C)],
     -Waddress \
     -Waggressive-loop-optimizations \
     -Wall \
+    -Wattribute-alias \
     -Wattributes \
     -Wbad-function-cast \
     -Wbool-compare \
@@ -125,6 +125,8 @@ m4_defun([gl_MANYWARN_ALL_GCC(C)],
     -Wbuiltin-declaration-mismatch \
     -Wbuiltin-macro-redefined \
     -Wcast-align \
+    -Wcast-align=strict \
+    -Wcast-function-type \
     -Wchar-subscripts \
     -Wchkp \
     -Wclobbered \
@@ -160,6 +162,7 @@ m4_defun([gl_MANYWARN_ALL_GCC(C)],
     -Wframe-address \
     -Wfree-nonheap-object \
     -Whsa \
+    -Wif-not-aligned \
     -Wignored-attributes \
     -Wignored-qualifiers \
     -Wimplicit \
@@ -181,6 +184,7 @@ m4_defun([gl_MANYWARN_ALL_GCC(C)],
     -Wmemset-elt-size \
     -Wmemset-transposed-args \
     -Wmisleading-indentation \
+    -Wmissing-attributes \
     -Wmissing-braces \
     -Wmissing-declarations \
     -Wmissing-field-initializers \
@@ -188,6 +192,7 @@ m4_defun([gl_MANYWARN_ALL_GCC(C)],
     -Wmissing-parameter-type \
     -Wmissing-prototypes \
     -Wmultichar \
+    -Wmultistatement-macros \
     -Wnarrowing \
     -Wnested-externs \
     -Wnonnull \
@@ -202,6 +207,7 @@ m4_defun([gl_MANYWARN_ALL_GCC(C)],
     -Woverride-init \
     -Wpacked \
     -Wpacked-bitfield-compat \
+    -Wpacked-not-aligned \
     -Wparentheses \
     -Wpointer-arith \
     -Wpointer-compare \
@@ -219,13 +225,17 @@ m4_defun([gl_MANYWARN_ALL_GCC(C)],
     -Wshift-count-overflow \
     -Wshift-negative-value \
     -Wsizeof-array-argument \
+    -Wsizeof-pointer-div \
     -Wsizeof-pointer-memaccess \
     -Wstack-protector \
     -Wstrict-aliasing \
     -Wstrict-overflow \
     -Wstrict-prototypes \
+    -Wstringop-truncation \
+    -Wsuggest-attribute=cold \
     -Wsuggest-attribute=const \
     -Wsuggest-attribute=format \
+    -Wsuggest-attribute=malloc \
     -Wsuggest-attribute=noreturn \
     -Wsuggest-attribute=pure \
     -Wsuggest-final-methods \