# -*- TCL -*-
# Auxiliary procedures for autoconf tests.
# Copyright (C) 1994 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 2 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, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

# Written by David MacKenzie <djm@gnu.ai.mit.edu>.

#
# Create a configure.in from a string.
# CONFIG.in is the file to create containing CONTENTS plus boilerplate.
# Return 1 if successful, 0 if an error occurs.
proc autoconf_create {config contents} {
    if [catch {open "$config.in" "w"} hand] {
	error "$config, cannot create $config.in"
	return 0
    }
    puts $hand "AC_INIT(confdummy.in)
$contents
AC_OUTPUT(confdummy)"
    close $hand

    if [catch {open "confdummy.in" "w"} hand] {
	error "$config, cannot create confdummy.in"
	return 0
    }
    puts $hand "# This is a dummy file for testing.
srcdir = @srcdir@
# Please ignore this file."
    close $hand

    return 1
}

# Compile a configure.in into a configure
#  and call error if there's any output (undefined macros, can't
#  find library files, etc.).
proc autoconf_start_plus {configout} {
    global comp_output

    set status [autoconf_start $configout]
    if {$status==0} {
	return 0
    }
    # Examine $comp_output.
    if [string match "*is obsolete*" "$comp_output"] then {
	return 1
    }
    if [string match "*allow cross*" "$comp_output"] then {
	return 1
    }
    if ![string match "" "$comp_output"] then {
	fail "$configout, problem with running autoconf"
	return 0
    }
    return 1
}

# Execute a configure script and check the output
#  against what it's supposed to be.
# Return 1 if successful so far, 0 if failure already.
proc autoconf_load_plus {args} {
    global exec_output

    set status [autoconf_load $args]
    if {$status==0} {
	return 0
    }
    if [string match "*:*" "$exec_output"] then {
	fail "$args, problem with executing"
	return 0
    }
    return 1
}

# Remove generated configuration files for test CONFIG.
# Return 1 if successful, 0 if not.
proc autoconf_remove {config} {
    if [catch "exec rm -f $config $config.in [glob -nocomplain conftest* confdummy*] config.status config.cache config.log"] {
	warning "$config output files, cannot remove"
	return 0
    }
    return 1
}

# The standard autoconf test: create, compile, run, and remove
# a simple configure script to test a single macro.
# TESTNAME is the name of the macro being tested.
# CONTENTS is the body of the configure script to create and test.
proc autoconf_test {testname contents} {
    if ![autoconf_remove $testname] {
	return 0
    }
    if ![autoconf_create $testname "$contents"] {
	return 0
    }
    if ![autoconf_start_plus $testname] {
	autoconf_remove $testname
	return 0
    }
    if ![autoconf_load_plus $testname] {
	autoconf_remove $testname
	return 0
    }
    if ![autoconf_remove $testname] {
	return 0
    }

    pass "$testname"
    return 1
}