# Some globals.
+# Support AC_CONFIG_MACRO_DIRS also with older autoconf.
+# FIXME: To be removed in Automake 1.14, once we can assume autoconf
+# 2.70 or later.
+# FIXME: keep in sync with 'internal/ac-config-macro-dirs.m4'.
+my $ac_config_macro_dirs_fallback =
+ 'm4_ifndef([AC_CONFIG_MACRO_DIRS], [' .
+ 'm4_defun([_AM_CONFIG_MACRO_DIRS], [])' .
+ 'm4_defun([AC_CONFIG_MACRO_DIRS], [_AM_CONFIG_MACRO_DIRS($@)])' .
+ '])';
+
# We do not operate in threaded mode.
$perl_threads = 0;
# user-supplied directories first, then the directory containing the
# automake macros, and finally the system-wide directories for
# third-party macros.
-# @user_includes can be augmented with -I.
+# @user_includes can be augmented with -I or AC_CONFIG_MACRO_DIRS.
# @automake_includes can be reset with the '--automake-acdir' option.
# @system_includes can be augmented with the 'dirlist' file or the
# ACLOCAL_PATH environment variable, and reset with the '--system-acdir'
my $serial_line_rx = '^#\s*serial\s+(\S*)';
my $serial_number_rx = '^\d+(?:\.\d+)*$';
-# Autoconf version
-# Set by trace_used_macros.
+# Autoconf version. This variable is set by 'trace_used_macros'.
my $ac_version;
+# User directory containing extra m4 files for macros definition,
+# as extracted from calls to the macro AC_CONFIG_MACRO_DIRS.
+# This variable is updated by 'trace_used_macros'.
+my @ac_config_macro_dirs;
+
# If set, names a temporary file that must be erased on abnormal exit.
my $erase_me;
sub reset_maps ();
sub install_file ($$);
sub list_compare (\@\@);
-sub scan_m4_dirs ($@);
+sub scan_m4_dirs ($$@);
sub scan_m4_files ();
sub add_macro ($);
sub scan_configure_dep ($);
################################################################
-# scan_m4_dirs($TYPE, @DIRS)
-# --------------------------
+# scan_m4_dirs($TYPE, $ERR_ON_NONEXISTING, @DIRS)
+# -----------------------------------------------
# Scan all M4 files installed in @DIRS for new macro definitions.
# Register each file as of type $TYPE (one of the FT_* constants).
-my $first_user_m4dir = 1;
-sub scan_m4_dirs ($@)
+sub scan_m4_dirs ($$@)
{
- my ($type, @dirlist) = @_;
+ my ($type, $err_on_nonexisting, @dirlist) = @_;
foreach my $m4dir (@dirlist)
{
if (! opendir (DIR, $m4dir))
{
- if ($install && $type == FT_USER && $first_user_m4dir)
- {
- # We will try to create this directory later, so don't
- # complain if it doesn't exist.
- # TODO: maybe we should avoid complaining only if errno
- # is ENONENT?
- $first_user_m4dir = 0;
- next;
- }
+ # TODO: maybe avoid complaining only if errno == ENONENT?
+ next unless $err_on_nonexisting;
fatal "couldn't open directory '$m4dir': $!";
}
}
# Finally, scan all files in our search paths.
- scan_m4_dirs (FT_USER, @user_includes);
- scan_m4_dirs (FT_AUTOMAKE, @automake_includes);
- scan_m4_dirs (FT_SYSTEM, @system_includes);
+
+ if (@user_includes)
+ {
+ # Don't complain if the first user directory doesn't exist, in case
+ # we need to create it later (can happen if '--install' was given).
+ scan_m4_dirs (FT_USER, !$install, $user_includes[0]);
+ scan_m4_dirs (FT_USER, 1, @user_includes[1..$#user_includes]);
+ }
+ scan_m4_dirs (FT_AUTOMAKE, 1, @automake_includes);
+ scan_m4_dirs (FT_SYSTEM, 1, @system_includes);
# Construct a new function that does the searching. We use a
# function (instead of just evaluating $search in the loop) so that
my %files = map { $map{$_} => 1 } keys %macro_seen;
%files = strip_redundant_includes %files;
+ # When AC_CONFIG_MACRO_DIRS is used, avoid possible spurious warnings
+ # from autom4te about macros being "m4_require'd but not m4_defun'd";
+ # for more background, see:
+ # http://lists.gnu.org/archive/html/autoconf-patches/2012-11/msg00004.html
+ # as well as autoconf commit 'v2.69-44-g1ed0548', "warn: allow aclocal
+ # to silence m4_require warnings".
+ my $early_m4_code .= "m4_define([m4_require_silent_probe], [-])";
+
my $traces = ($ENV{AUTOM4TE} || '@am_AUTOM4TE@');
$traces .= " --language Autoconf-without-aclocal-m4 ";
+ $traces = "echo '$early_m4_code' | $traces - ";
+
+ # Support AC_CONFIG_MACRO_DIRS also with older autoconf.
+ # Note that we can't use '$ac_config_macro_dirs_fallback' here, because
+ # a bug in option parsing code of autom4te 2.68 and earlier will cause
+ # it to read standard input last, even if the "-" argument is specified
+ # early.
+ # FIXME: To be removed in Automake 1.14, once we can assume autoconf
+ # 2.70 or later.
+ $traces .= "$automake_includes[0]/internal/ac-config-macro-dirs.m4 ";
+
# All candidate files.
$traces .= join (' ',
(map { "'$_'" }
(grep { exists $files{$_} } @file_order))) . " ";
+
# All candidate macros.
$traces .= join (' ',
- (map { "--trace='$_:\$f::\$n::\$1'" }
+ (map { "--trace='$_:\$f::\$n::\${::}%'" }
('AC_DEFUN',
'AC_DEFUN_ONCE',
'AU_DEFUN',
- '_AM_AUTOCONF_VERSION')),
+ '_AM_AUTOCONF_VERSION',
+ 'AC_CONFIG_MACRO_DIR_TRACE',
+ # FIXME: Tracing the next two macros is a hack for
+ # compatibility with older autoconf. Remove this in
+ # Automake 1.14, when we can assume Autoconf 2.70 or
+ # later.
+ 'AC_CONFIG_MACRO_DIR',
+ '_AM_CONFIG_MACRO_DIRS')),
# Do not trace $1 for all other macros as we do
# not need it and it might contains harmful
# characters (like newlines).
my $tracefh = new Automake::XFile ("$traces $configure_ac |");
+ @ac_config_macro_dirs = ();
+
my %traced = ();
while ($_ = $tracefh->getline)
$traced{$macro} = 1 if exists $macro_seen{$macro};
- $map_traced_defs{$arg1} = $file
- if ($macro eq 'AC_DEFUN'
- || $macro eq 'AC_DEFUN_ONCE'
- || $macro eq 'AU_DEFUN');
-
- $ac_version = $arg1 if $macro eq '_AM_AUTOCONF_VERSION';
+ if ($macro eq 'AC_DEFUN' || $macro eq 'AC_DEFUN_ONCE'
+ || $macro eq 'AU_DEFUN')
+ {
+ $map_traced_defs{$arg1} = $file;
+ }
+ elsif ($macro eq '_AM_AUTOCONF_VERSION')
+ {
+ $ac_version = $arg1;
+ }
+ elsif ($macro eq 'AC_CONFIG_MACRO_DIR_TRACE')
+ {
+ push @ac_config_macro_dirs, $arg1;
+ }
+ # FIXME: We still need to trace AC_CONFIG_MACRO_DIR
+ # for compatibility with older autoconf. Remove this
+ # once we can assume Autoconf 2.70 or later.
+ elsif ($macro eq 'AC_CONFIG_MACRO_DIR')
+ {
+ @ac_config_macro_dirs = ($arg1);
+ }
+ # FIXME:This is an hack for compatibility with older autoconf.
+ # Remove this once we can assume Autoconf 2.70 or later.
+ elsif ($macro eq '_AM_CONFIG_MACRO_DIRS')
+ {
+ # Empty leading/trailing fields might be produced by split,
+ # hence the grep is really needed.
+ push @ac_config_macro_dirs, grep (/./, (split /\s+/, $arg1));
+ }
}
+ # FIXME: in Autoconf >= 2.70, AC_CONFIG_MACRO_DIR calls
+ # AC_CONFIG_MACRO_DIR_TRACE behind the scenes, which could
+ # leave unwanted duplicates in @ac_config_macro_dirs.
+ # Remove this in Automake 1.14, when we'll stop tracing
+ # AC_CONFIG_MACRO_DIR explicitly.
+ @ac_config_macro_dirs = uniq @ac_config_macro_dirs;
+
$tracefh->close;
return %traced;
# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
# PARTICULAR PURPOSE.
+$ac_config_macro_dirs_fallback
$output";
# We try not to update $output_file unless necessary, because
exit 0;
}
-# Using --acdir overrides both the automake (versioned) directory and
-# the public (unversioned) system directory. This usage is obsolete.
-sub handle_acdir_option ($$)
-{
- msg 'obsolete', '', "'--acdir' is deprecated\n";
- @system_includes = ($_[1]);
- @automake_includes = ();
-}
-
# Parse command line.
sub parse_arguments ()
{
(
'help' => sub { usage(0); },
'version' => \&version,
- 'acdir=s' => \&handle_acdir_option,
'system-acdir=s' => sub { shift; @system_includes = @_; },
'automake-acdir=s' => sub { shift; @automake_includes = @_; },
'diff:s' => \$diff_command,
$dry_run = 1;
}
- if ($install && !@user_includes)
- {
- fatal ("--install should copy macros in the directory indicated by the"
- . "\nfirst -I option, but no -I was supplied");
- }
-
# Finally, adds any directory listed in the 'dirlist' file.
if (open (DIRLIST, "$system_includes[0]/dirlist"))
{
# we did not rerun aclocal, the next run of aclocal would produce a
# different aclocal.m4.
my $loop = 0;
+my $rerun_due_to_macrodir = 0;
while (1)
{
++$loop;
- prog_error "too many loops" if $loop > 2;
+ prog_error "too many loops" if $loop > 2 + $rerun_due_to_macrodir;
reset_maps;
scan_m4_files;
scan_configure;
last if $exit_code;
my %macro_traced = trace_used_macros;
+
+ if (!$rerun_due_to_macrodir && @ac_config_macro_dirs)
+ {
+ # The directory specified in calls to the AC_CONFIG_MACRO_DIRS
+ # m4 macro (if any) must go after the user includes specified
+ # explicitly with the '-I' option.
+ push @user_includes, @ac_config_macro_dirs;
+ # We might have to scan some new directory of .m4 files.
+ $rerun_due_to_macrodir++;
+ next;
+ }
+
+ if ($install && !@user_includes)
+ {
+ fatal "installation of third-party macros impossible without " .
+ "-I options nor AC_CONFIG_MACRO_DIR{,S} m4 macro(s)";
+ }
+
last if write_aclocal ($output_file, keys %macro_traced);
last if $dry_run;
}