update to latest autoconf-archive macros

m4/ax_append_compile_flags.m4

@@ -1,10 +1,10 @@
-# ===========================================================================
-#  http://www.gnu.org/software/autoconf-archive/ax_append_compile_flags.html
-# ===========================================================================
+# ============================================================================
+#  https://www.gnu.org/software/autoconf-archive/ax_append_compile_flags.html
+# ============================================================================
 #
 # SYNOPSIS
 #
-#   AX_APPEND_COMPILE_FLAGS([FLAG1 FLAG2 ...], [FLAGS-VARIABLE], [EXTRA-FLAGS])
+#   AX_APPEND_COMPILE_FLAGS([FLAG1 FLAG2 ...], [FLAGS-VARIABLE], [EXTRA-FLAGS], [INPUT])
 #
 # DESCRIPTION
 #
@@ -20,6 +20,8 @@
 #   the flags: "CFLAGS EXTRA-FLAGS FLAG".  This can for example be used to
 #   force the compiler to issue an error when a bad flag is given.
 #
+#   INPUT gives an alternative input source to AC_COMPILE_IFELSE.
+#
 #   NOTE: This macro depends on the AX_APPEND_FLAG and
 #   AX_CHECK_COMPILE_FLAG. Please keep this macro in sync with
 #   AX_APPEND_LINK_FLAGS.
@@ -28,38 +30,17 @@
 #
 #   Copyright (c) 2011 Maarten Bosmans <[email protected]>
 #
-#   This program is free software: you can redistribute it and/or modify it
-#   under the terms of the GNU General Public License as published by the
-#   Free Software Foundation, either version 3 of the License, or (at your
-#   option) any later version.
-#
-#   This program is distributed in the hope that it will be useful, but
-#   WITHOUT ANY WARRANTY; without even the implied warranty of
-#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
-#   Public License for more details.
-#
-#   You should have received a copy of the GNU General Public License along
-#   with this program. If not, see <http://www.gnu.org/licenses/>.
-#
-#   As a special exception, the respective Autoconf Macro's copyright owner
-#   gives unlimited permission to copy, distribute and modify the configure
-#   scripts that are the output of Autoconf when processing the Macro. You
-#   need not follow the terms of the GNU General Public License when using
-#   or distributing such scripts, even though portions of the text of the
-#   Macro appear in them. The GNU General Public License (GPL) does govern
-#   all other use of the material that constitutes the Autoconf Macro.
-#
-#   This special exception to the GPL applies to versions of the Autoconf
-#   Macro released by the Autoconf Archive. When you make and distribute a
-#   modified version of the Autoconf Macro, you may extend this special
-#   exception to the GPL to apply to your modified version as well.
+#   Copying and distribution of this file, with or without modification, are
+#   permitted in any medium without royalty provided the copyright notice
+#   and this notice are preserved.  This file is offered as-is, without any
+#   warranty.
 
-#serial 3
+#serial 7
 
 AC_DEFUN([AX_APPEND_COMPILE_FLAGS],
-[AC_REQUIRE([AX_CHECK_COMPILE_FLAG])
-AC_REQUIRE([AX_APPEND_FLAG])
+[AX_REQUIRE_DEFINED([AX_CHECK_COMPILE_FLAG])
+AX_REQUIRE_DEFINED([AX_APPEND_FLAG])
 for flag in $1; do
-  AX_CHECK_COMPILE_FLAG([$flag], [AX_APPEND_FLAG([$flag], [$2])], [], [$3])
+  AX_CHECK_COMPILE_FLAG([$flag], [AX_APPEND_FLAG([$flag], [$2])], [], [$3], [$4])
 done
 ])dnl AX_APPEND_COMPILE_FLAGS

m4/ax_append_flag.m4

@@ -1,5 +1,5 @@
 # ===========================================================================
-#      http://www.gnu.org/software/autoconf-archive/ax_append_flag.html
+#      https://www.gnu.org/software/autoconf-archive/ax_append_flag.html
 # ===========================================================================
 #
 # SYNOPSIS
@@ -23,47 +23,28 @@
 #   Copyright (c) 2008 Guido U. Draheim <[email protected]>
 #   Copyright (c) 2011 Maarten Bosmans <[email protected]>
 #
-#   This program is free software: you can redistribute it and/or modify it
-#   under the terms of the GNU General Public License as published by the
-#   Free Software Foundation, either version 3 of the License, or (at your
-#   option) any later version.
-#
-#   This program is distributed in the hope that it will be useful, but
-#   WITHOUT ANY WARRANTY; without even the implied warranty of
-#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
-#   Public License for more details.
-#
-#   You should have received a copy of the GNU General Public License along
-#   with this program. If not, see <http://www.gnu.org/licenses/>.
-#
-#   As a special exception, the respective Autoconf Macro's copyright owner
-#   gives unlimited permission to copy, distribute and modify the configure
-#   scripts that are the output of Autoconf when processing the Macro. You
-#   need not follow the terms of the GNU General Public License when using
-#   or distributing such scripts, even though portions of the text of the
-#   Macro appear in them. The GNU General Public License (GPL) does govern
-#   all other use of the material that constitutes the Autoconf Macro.
-#
-#   This special exception to the GPL applies to versions of the Autoconf
-#   Macro released by the Autoconf Archive. When you make and distribute a
-#   modified version of the Autoconf Macro, you may extend this special
-#   exception to the GPL to apply to your modified version as well.
+#   Copying and distribution of this file, with or without modification, are
+#   permitted in any medium without royalty provided the copyright notice
+#   and this notice are preserved.  This file is offered as-is, without any
+#   warranty.
 
-#serial 2
+#serial 8
 
 AC_DEFUN([AX_APPEND_FLAG],
-[AC_PREREQ(2.59)dnl for _AC_LANG_PREFIX
-AS_VAR_PUSHDEF([FLAGS], [m4_default($2,_AC_LANG_PREFIX[FLAGS])])dnl
-AS_VAR_SET_IF(FLAGS,
-  [case " AS_VAR_GET(FLAGS) " in
-    *" $1 "*)
-      AC_RUN_LOG([: FLAGS already contains $1])
-      ;;
-    *)
-      AC_RUN_LOG([: FLAGS="$FLAGS $1"])
-      AS_VAR_SET(FLAGS, ["AS_VAR_GET(FLAGS) $1"])
-      ;;
-   esac],
-  [AS_VAR_SET(FLAGS,["$1"])])
+[dnl
+AC_PREREQ(2.64)dnl for _AC_LANG_PREFIX and AS_VAR_SET_IF
+AS_VAR_PUSHDEF([FLAGS], [m4_default($2,_AC_LANG_PREFIX[FLAGS])])
+AS_VAR_SET_IF(FLAGS,[
+  AS_CASE([" AS_VAR_GET(FLAGS) "],
+    [*" $1 "*], [AC_RUN_LOG([: FLAGS already contains $1])],
+    [
+     AS_VAR_APPEND(FLAGS,[" $1"])
+     AC_RUN_LOG([: FLAGS="$FLAGS"])
+    ])
+  ],
+  [
+  AS_VAR_SET(FLAGS,[$1])
+  AC_RUN_LOG([: FLAGS="$FLAGS"])
+  ])
 AS_VAR_POPDEF([FLAGS])dnl
 ])dnl AX_APPEND_FLAG

m4/ax_check_compile_flag.m4

@@ -1,10 +1,10 @@
 # ===========================================================================
-#   http://www.gnu.org/software/autoconf-archive/ax_check_compile_flag.html
+#  https://www.gnu.org/software/autoconf-archive/ax_check_compile_flag.html
 # ===========================================================================
 #
 # SYNOPSIS
 #
-#   AX_CHECK_COMPILE_FLAG(FLAG, [ACTION-SUCCESS], [ACTION-FAILURE], [EXTRA-FLAGS])
+#   AX_CHECK_COMPILE_FLAG(FLAG, [ACTION-SUCCESS], [ACTION-FAILURE], [EXTRA-FLAGS], [INPUT])
 #
 # DESCRIPTION
 #
@@ -19,6 +19,8 @@
 #   the flags: "CFLAGS EXTRA-FLAGS FLAG".  This can for example be used to
 #   force the compiler to issue an error when a bad flag is given.
 #
+#   INPUT gives an alternative input source to AC_COMPILE_IFELSE.
+#
 #   NOTE: Implementation based on AX_CFLAGS_GCC_OPTION. Please keep this
 #   macro in sync with AX_CHECK_{PREPROC,LINK}_FLAG.
 #
@@ -27,45 +29,34 @@
 #   Copyright (c) 2008 Guido U. Draheim <[email protected]>
 #   Copyright (c) 2011 Maarten Bosmans <[email protected]>
 #
-#   This program is free software: you can redistribute it and/or modify it
-#   under the terms of the GNU General Public License as published by the
-#   Free Software Foundation, either version 3 of the License, or (at your
-#   option) any later version.
-#
-#   This program is distributed in the hope that it will be useful, but
-#   WITHOUT ANY WARRANTY; without even the implied warranty of
-#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
-#   Public License for more details.
-#
-#   You should have received a copy of the GNU General Public License along
-#   with this program. If not, see <http://www.gnu.org/licenses/>.
-#
-#   As a special exception, the respective Autoconf Macro's copyright owner
-#   gives unlimited permission to copy, distribute and modify the configure
-#   scripts that are the output of Autoconf when processing the Macro. You
-#   need not follow the terms of the GNU General Public License when using
-#   or distributing such scripts, even though portions of the text of the
-#   Macro appear in them. The GNU General Public License (GPL) does govern
-#   all other use of the material that constitutes the Autoconf Macro.
-#
-#   This special exception to the GPL applies to versions of the Autoconf
-#   Macro released by the Autoconf Archive. When you make and distribute a
-#   modified version of the Autoconf Macro, you may extend this special
-#   exception to the GPL to apply to your modified version as well.
+#   Copying and distribution of this file, with or without modification, are
+#   permitted in any medium without royalty provided the copyright notice
+#   and this notice are preserved.  This file is offered as-is, without any
+#   warranty.
 
-#serial 2
+#serial 11
 
 AC_DEFUN([AX_CHECK_COMPILE_FLAG],
-[AC_PREREQ(2.59)dnl for _AC_LANG_PREFIX
+[AC_PREREQ(2.64)dnl for _AC_LANG_PREFIX and AS_VAR_IF
 AS_VAR_PUSHDEF([CACHEVAR],[ax_cv_check_[]_AC_LANG_ABBREV[]flags_$4_$1])dnl
-AC_CACHE_CHECK([whether _AC_LANG compiler accepts $1], CACHEVAR, [
+AC_CACHE_CHECK([whether the _AC_LANG compiler accepts $1], CACHEVAR, [
   ax_check_save_flags=$[]_AC_LANG_PREFIX[]FLAGS
-  _AC_LANG_PREFIX[]FLAGS="$[]_AC_LANG_PREFIX[]FLAGS $4 $1"
-  AC_COMPILE_IFELSE([AC_LANG_PROGRAM()],
+  if test x"m4_case(_AC_LANG,
+                     [C], [$GCC],
+                     [C++], [$GXX],
+                     [Fortran], [$GFC],
+                     [Fortran 77], [$G77],
+                     [Objective C], [$GOBJC],
+                     [Objective C++], [$GOBJCXX],
+                     [no])" = xyes ; then
+    add_gnu_werror="-Werror"
+  fi
+  _AC_LANG_PREFIX[]FLAGS="$[]_AC_LANG_PREFIX[]FLAGS $4 $1 $add_gnu_werror"
+  AC_COMPILE_IFELSE([m4_default([$5],[AC_LANG_PROGRAM()])],
     [AS_VAR_SET(CACHEVAR,[yes])],
     [AS_VAR_SET(CACHEVAR,[no])])
   _AC_LANG_PREFIX[]FLAGS=$ax_check_save_flags])
-AS_IF([test x"AS_VAR_GET(CACHEVAR)" = xyes],
+AS_VAR_IF(CACHEVAR,yes,
   [m4_default([$2], :)],
   [m4_default([$3], :)])
 AS_VAR_POPDEF([CACHEVAR])dnl

m4/ax_check_user_namespace.m4

@@ -1,57 +1 @@
-# -*- Autoconf -*-
-
-# SYNOPSIS
-#
-#   AX_CHECK_USER_NAMESPACE
-#
-# DESCRIPTION
-#
-#   This macro checks whether the local system supports Linux user namespaces.
-#   If so, it calls AC_DEFINE(HAVE_USER_NAMESPACE).
-#
-# Copyright (C) The c-ares team
-# SPDX-License-Identifier: MIT
-
-AC_DEFUN([AX_CHECK_USER_NAMESPACE],[dnl
- AC_CACHE_CHECK([whether user namespaces are supported],
-  ax_cv_user_namespace,[
-  AC_LANG_PUSH([C])
-  AC_RUN_IFELSE([AC_LANG_SOURCE([[
-#define _GNU_SOURCE
-#include <fcntl.h>
-#include <sched.h>
-#include <signal.h>
-#include <stdio.h>
-#include <string.h>
-#include <sys/types.h>
-#include <sys/wait.h>
-
-int userfn(void *d) {
-  usleep(100000);  /* synchronize by sleep */
-  return (getuid() != 0);
-}
-char userst[1024*1024];
-int main() {
-  char buffer[1024];
-  int rc, status, fd;
-  pid_t child = clone(userfn, userst + 1024*1024, CLONE_NEWUSER|SIGCHLD, 0);
-  if (child < 0) return 1;
-
-  snprintf(buffer, sizeof(buffer), "/proc/%d/uid_map", child);
-  fd = open(buffer, O_CREAT|O_WRONLY|O_TRUNC, 0755);
-  snprintf(buffer, sizeof(buffer), "0 %d 1\n", getuid());
-  write(fd, buffer, strlen(buffer));
-  close(fd);
-
-  rc = waitpid(child, &status, 0);
-  if (rc <= 0) return 1;
-  if (!WIFEXITED(status)) return 1;
-  return WEXITSTATUS(status);
-}
-  ]])],[ax_cv_user_namespace=yes],[ax_cv_user_namespace=no],[ax_cv_user_namespace=no])
- AC_LANG_POP([C])
- ])
- if test "$ax_cv_user_namespace" = yes; then
-   AC_DEFINE([HAVE_USER_NAMESPACE],[1],[Whether user namespaces are available])
- fi
-]) # AX_CHECK_USER_NAMESPACE
+404: Not Found

m4/ax_check_uts_namespace.m4

@@ -1,79 +1 @@
-# -*- Autoconf -*-
-
-# SYNOPSIS
-#
-#   AX_CHECK_UTS_NAMESPACE
-#
-# DESCRIPTION
-#
-#   This macro checks whether the local system supports Linux UTS namespaces.
-#   Also requires user namespaces to be available, so that non-root users
-#   can enter the namespace.
-#   If so, it calls AC_DEFINE(HAVE_UTS_NAMESPACE).
-#
-# Copyright (C) The c-ares team
-# SPDX-License-Identifier: MIT
-
-AC_DEFUN([AX_CHECK_UTS_NAMESPACE],[dnl
- AC_CACHE_CHECK([whether UTS namespaces are supported],
-  ax_cv_uts_namespace,[
-  AC_LANG_PUSH([C])
-  AC_RUN_IFELSE([AC_LANG_SOURCE([[
-#define _GNU_SOURCE
-#include <sched.h>
-#include <signal.h>
-#include <stdio.h>
-#include <string.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include <sys/types.h>
-#include <sys/wait.h>
-
-int utsfn(void *d) {
-  char buffer[1024];
-  const char *name = "autoconftest";
-  int rc = sethostname(name, strlen(name));
-  if (rc != 0) return 1;
-  gethostname(buffer, 1024);
-  return (strcmp(buffer, name) != 0);
-}
-
-char st2[1024*1024];
-int fn(void *d) {
-  pid_t child;
-  int rc, status;
-  usleep(100000);  /* synchronize by sleep */
-  if (getuid() != 0) return 1;
-  child = clone(utsfn, st2 + 1024*1024, CLONE_NEWUTS|SIGCHLD, 0);
-  if (child < 0) return 1;
-  rc = waitpid(child, &status, 0);
-  if (rc <= 0) return 1;
-  if (!WIFEXITED(status)) return 1;
-  return WEXITSTATUS(status);
-}
-char st[1024*1024];
-int main() {
-  char buffer[1024];
-  int rc, status, fd;
-  pid_t child = clone(fn, st + 1024*1024, CLONE_NEWUSER|SIGCHLD, 0);
-  if (child < 0) return 1;
-
-  snprintf(buffer, sizeof(buffer), "/proc/%d/uid_map", child);
-  fd = open(buffer, O_CREAT|O_WRONLY|O_TRUNC, 0755);
-  snprintf(buffer, sizeof(buffer), "0 %d 1\n", getuid());
-  write(fd, buffer, strlen(buffer));
-  close(fd);
-
-  rc = waitpid(child, &status, 0);
-  if (rc <= 0) return 1;
-  if (!WIFEXITED(status)) return 1;
-  return WEXITSTATUS(status);
-}
-]])
-  ],[ax_cv_uts_namespace=yes],[ax_cv_uts_namespace=no],[ax_cv_uts_namespace=no])
- AC_LANG_POP([C])
- ])
- if test "$ax_cv_uts_namespace" = yes; then
-   AC_DEFINE([HAVE_UTS_NAMESPACE],[1],[Whether UTS namespaces are available])
- fi
-]) # AX_CHECK_UTS_NAMESPACE
+404: Not Found