Move gdb/warning.m4 to gdbsupport

This file is used by gdbsupport, gdbserver and gdb, so I think it
belongs in gdbsupport.  Move it there and update the references the
various acinclude.m4 files.

gdbsupport/ChangeLog:

	* warning.m4: Move here, from gdb/warning.m4.
	* acinclude.m4: Update warning.m4 path.
	* Makefile.in: Re-generate.

gdbserver/ChangeLog:

	* acinclude.m4: Update warning.m4 path.

gdb/ChangeLog:

	* acinclude: Update warning.m4 path.
	* warning.m4: Move to gdbsupport.

3 files changed, 6 insertions, 160 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 4f104bc..fcb7980 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,8 @@
+2020-02-11  Simon Marchi  <simon.marchi@efficios.com>
+
+	* acinclude: Update warning.m4 path.
+	* warning.m4: Move to gdbsupport.
+
 2020-02-11  Tom Tromey  <tromey@adacore.com>
 
 	* remote.c (remote_console_output): Update.
diff --git a/gdb/acinclude.m4 b/gdb/acinclude.m4
index d60b2fe..14304bb 100644
--- a/gdb/acinclude.m4
+++ b/gdb/acinclude.m4
@@ -10,7 +10,7 @@ m4_include(acx_configure_dir.m4)
 m4_include(transform.m4)
 
 # This gets AM_GDB_WARNINGS.
-m4_include(warning.m4)
+m4_include(../gdbsupport/warning.m4)
 
 # AM_GDB_UBSAN
 m4_include(sanitize.m4)
diff --git a/gdb/warning.m4 b/gdb/warning.m4
deleted file mode 100644
index e2b8a43..0000000
--- a/gdb/warning.m4
+++ /dev/null
@@ -1,159 +0,0 @@
-dnl Autoconf configure script for GDB, the GNU debugger.
-dnl Copyright (C) 1995-2020 Free Software Foundation, Inc.
-dnl
-dnl This file is part of GDB.
-dnl
-dnl This program is free software; you can redistribute it and/or modify
-dnl it under the terms of the GNU General Public License as published by
-dnl the Free Software Foundation; either version 3 of the License, or
-dnl (at your option) any later version.
-dnl
-dnl This program is distributed in the hope that it will be useful,
-dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
-dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-dnl GNU General Public License for more details.
-dnl
-dnl You should have received a copy of the GNU General Public License
-dnl along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
-AC_DEFUN([AM_GDB_WARNINGS],[
-AC_ARG_ENABLE(werror,
-  AS_HELP_STRING([--enable-werror], [treat compile warnings as errors]),
-  [case "${enableval}" in
-     yes | y) ERROR_ON_WARNING="yes" ;;
-     no | n)  ERROR_ON_WARNING="no" ;;
-     *) AC_MSG_ERROR(bad value ${enableval} for --enable-werror) ;;
-   esac])
-
-# Enable -Werror by default when using gcc.  Turn it off for releases.
-if test "${GCC}" = yes -a -z "${ERROR_ON_WARNING}" && $development; then
-    ERROR_ON_WARNING=yes
-fi
-
-WERROR_CFLAGS=""
-if test "${ERROR_ON_WARNING}" = yes ; then
-    WERROR_CFLAGS="-Werror"
-fi
-
-# The options we'll try to enable.
-build_warnings="-Wall -Wpointer-arith \
--Wno-unused -Wunused-value -Wunused-variable -Wunused-function \
--Wno-switch -Wno-char-subscripts \
--Wempty-body -Wunused-but-set-parameter -Wunused-but-set-variable \
--Wno-sign-compare -Wno-error=maybe-uninitialized \
--Wno-mismatched-tags \
--Wno-error=deprecated-register \
--Wsuggest-override \
--Wimplicit-fallthrough=3 \
--Wduplicated-cond \
--Wshadow=local \
--Wdeprecated-copy \
--Wdeprecated-copy-dtor \
--Wredundant-move \
--Wmissing-declarations"
-
-case "${host}" in
-  *-*-mingw32*)
-    # Enable -Wno-format by default when using gcc on mingw since many
-    # GCC versions complain about %I64.
-    build_warnings="$build_warnings -Wno-format" ;;
-  *-*-solaris*)
-    # Solaris 11.4 <python2.7/ceval.h> uses #pragma no_inline that GCC
-    # doesn't understand.
-    build_warnings="$build_warnings -Wno-unknown-pragmas"
-    # Solaris 11 <unistd.h> marks vfork deprecated.
-    build_warnings="$build_warnings -Wno-deprecated-declarations" ;;
-  *)
-    # Note that gcc requires -Wformat for -Wformat-nonliteral to work,
-    # but there's a special case for this below.
-    build_warnings="$build_warnings -Wformat-nonliteral" ;;
-esac
-
-AC_ARG_ENABLE(build-warnings,
-AS_HELP_STRING([--enable-build-warnings], [enable build-time compiler warnings if gcc is used]),
-[case "${enableval}" in
-  yes)	;;
-  no)	build_warnings="-w";;
-  ,*)   t=`echo "${enableval}" | sed -e "s/,/ /g"`
-        build_warnings="${build_warnings} ${t}";;
-  *,)   t=`echo "${enableval}" | sed -e "s/,/ /g"`
-        build_warnings="${t} ${build_warnings}";;
-  *)    build_warnings=`echo "${enableval}" | sed -e "s/,/ /g"`;;
-esac
-if test x"$silent" != x"yes" && test x"$build_warnings" != x""; then
-  echo "Setting compiler warning flags = $build_warnings" 6>&1
-fi])dnl
-AC_ARG_ENABLE(gdb-build-warnings,
-AS_HELP_STRING([--enable-gdb-build-warnings], [enable GDB specific build-time compiler warnings if gcc is used]),
-[case "${enableval}" in
-  yes)	;;
-  no)	build_warnings="-w";;
-  ,*)   t=`echo "${enableval}" | sed -e "s/,/ /g"`
-        build_warnings="${build_warnings} ${t}";;
-  *,)   t=`echo "${enableval}" | sed -e "s/,/ /g"`
-        build_warnings="${t} ${build_warnings}";;
-  *)    build_warnings=`echo "${enableval}" | sed -e "s/,/ /g"`;;
-esac
-if test x"$silent" != x"yes" && test x"$build_warnings" != x""; then
-  echo "Setting GDB specific compiler warning flags = $build_warnings" 6>&1
-fi])dnl
-
-# The set of warnings supported by a C++ compiler is not the same as
-# of the C compiler.
-AC_LANG_PUSH([C++])
-
-WARN_CFLAGS=""
-if test "x${build_warnings}" != x -a "x$GCC" = xyes
-then
-    AC_MSG_CHECKING(compiler warning flags)
-    # Separate out the -Werror flag as some files just cannot be
-    # compiled with it enabled.
-    for w in ${build_warnings}; do
-	# GCC does not complain about -Wno-unknown-warning.  Invert
-	# and test -Wunknown-warning instead.
-	case $w in
-	-Wno-*)
-		wtest=`echo $w | sed 's/-Wno-/-W/g'` ;;
-        -Wformat-nonliteral)
-		# gcc requires -Wformat before -Wformat-nonliteral
-		# will work, so stick them together.
-		w="-Wformat $w"
-		wtest="$w"
-		;;
-	*)
-		wtest=$w ;;
-	esac
-
-	case $w in
-	-Werr*) WERROR_CFLAGS=-Werror ;;
-	*)
-	    # Check whether GCC accepts it.
-	    saved_CFLAGS="$CFLAGS"
-	    CFLAGS="$CFLAGS -Werror $wtest"
-	    saved_CXXFLAGS="$CXXFLAGS"
-	    CXXFLAGS="$CXXFLAGS -Werror $wtest"
-	    if test "x$w" = "x-Wunused-variable"; then
-	      # Check for https://gcc.gnu.org/bugzilla/show_bug.cgi?id=38958,
-	      # fixed in GCC 4.9.  This test is derived from the gdb
-	      # source code that triggered this bug in GCC.
-	      AC_TRY_COMPILE(
-	        [struct scoped_restore_base {};
-                 struct scoped_restore_tmpl : public scoped_restore_base {
-		   ~scoped_restore_tmpl() {}
-		 };],
-		[const scoped_restore_base &b = scoped_restore_tmpl();],
-		WARN_CFLAGS="${WARN_CFLAGS} $w",)
-	    else
-	      AC_TRY_COMPILE([],[],WARN_CFLAGS="${WARN_CFLAGS} $w",)
-	    fi
-	    CFLAGS="$saved_CFLAGS"
-	    CXXFLAGS="$saved_CXXFLAGS"
-	esac
-    done
-    AC_MSG_RESULT(${WARN_CFLAGS} ${WERROR_CFLAGS})
-fi
-AC_SUBST(WARN_CFLAGS)
-AC_SUBST(WERROR_CFLAGS)
-
-AC_LANG_POP([C++])
-])