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# Copyright (C) 2018 Free Software Foundation, Inc.
# 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/>.
package Automake::CondStack;
use 5.006;
use strict;
use Exporter;
use Automake::Condition qw (TRUE FALSE);
use Automake::Global;
use Automake::Channels;
use Automake::ChannelDefs;
use vars qw (@ISA @EXPORT);
@ISA = qw (Exporter);
@EXPORT = qw (@cond_stack &cond_stack_if &cond_stack_else &cond_stack_endif);
# This is the conditional stack, updated on if/else/endif, and
# used to build Condition objects.
our @cond_stack;
my %_am_macro_for_cond =
(
AMDEP => "one of the compiler tests\n"
. " AC_PROG_CC, AC_PROG_CXX, AC_PROG_OBJC, AC_PROG_OBJCXX,\n"
. " AM_PROG_AS, AM_PROG_GCJ, AM_PROG_UPC",
am__fastdepCC => 'AC_PROG_CC',
am__fastdepCCAS => 'AM_PROG_AS',
am__fastdepCXX => 'AC_PROG_CXX',
am__fastdepGCJ => 'AM_PROG_GCJ',
am__fastdepOBJC => 'AC_PROG_OBJC',
am__fastdepOBJCXX => 'AC_PROG_OBJCXX',
am__fastdepUPC => 'AM_PROG_UPC'
);
# $STRING
# _make_conditional_string ($NEGATE, $COND)
# ----------------------------------------
sub _make_conditional_string
{
my ($negate, $cond) = @_;
$cond = "${cond}_TRUE"
unless $cond =~ /^TRUE|FALSE$/;
$cond = Automake::Condition::conditional_negate ($cond)
if $negate;
return $cond;
}
# $COND
# cond_stack_if ($NEGATE, $COND, $WHERE)
# --------------------------------------
sub cond_stack_if
{
my ($negate, $cond, $where) = @_;
if (! $configure_cond{$cond} && $cond !~ /^TRUE|FALSE$/)
{
my $text = "$cond does not appear in AM_CONDITIONAL";
my $scope = US_LOCAL;
if (exists $_am_macro_for_cond{$cond})
{
my $mac = $_am_macro_for_cond{$cond};
$text .= "\n The usual way to define '$cond' is to add ";
$text .= ($mac =~ / /) ? $mac : "'$mac'";
$text .= "\n to '$configure_ac' and run 'aclocal' and 'autoconf' again";
# These warnings appear in Automake files (depend2.am),
# so there is no need to display them more than once:
$scope = US_GLOBAL;
}
error $where, $text, uniq_scope => $scope;
}
push (@cond_stack, _make_conditional_string ($negate, $cond));
return new Automake::Condition (@cond_stack);
}
# $COND
# cond_stack_else ($NEGATE, $COND, $WHERE)
# ----------------------------------------
sub cond_stack_else
{
my ($negate, $cond, $where) = @_;
if (! @cond_stack)
{
error $where, "else without if";
return FALSE;
}
$cond_stack[$#cond_stack] =
Automake::Condition::conditional_negate ($cond_stack[$#cond_stack]);
# If $COND is given, check against it.
if (defined $cond)
{
$cond = _make_conditional_string ($negate, $cond);
error ($where, "else reminder ($negate$cond) incompatible with "
. "current conditional: $cond_stack[$#cond_stack]")
if $cond_stack[$#cond_stack] ne $cond;
}
return new Automake::Condition (@cond_stack);
}
# $COND
# cond_stack_endif ($NEGATE, $COND, $WHERE)
# -----------------------------------------
sub cond_stack_endif
{
my ($negate, $cond, $where) = @_;
my $old_cond;
if (! @cond_stack)
{
error $where, "endif without if";
return TRUE;
}
# If $COND is given, check against it.
if (defined $cond)
{
$cond = _make_conditional_string ($negate, $cond);
error ($where, "endif reminder ($negate$cond) incompatible with "
. "current conditional: $cond_stack[$#cond_stack]")
if $cond_stack[$#cond_stack] ne $cond;
}
pop @cond_stack;
return new Automake::Condition (@cond_stack);
}
1;
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