#! /usr/bin/perl
# Build Emacs with various options for profiling, debugging,
# with and without warnings enabled etc.

# Copyright (C) 2001-2020 Free Software Foundation, Inc.

# This file is part of GNU Emacs.

# GNU Emacs 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.

# GNU Emacs 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 GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.


require 5;
use strict;
use warnings;
use Getopt::Long;
use File::Basename;
use Cwd;

# Default CVS sandbox directory.  Only used when called from outside
# of the sandbox.

$root = $ENV{"EMACS_ROOT"};
$root = "/gd/gnu/emacs" unless $root;

# Default make command.

$make = $ENV{"EMACS_MAKE"};
$make = "gmake" unless $make;

$rc = GetOptions ("help" => \$help,
		  "enable-checking" => \$enable_checking,
		  "no-warn" => \$no_warn,
		  "check-marked" => \$check_marked,
		  "all" => \$all,
		  "no-optim" => \$no_optim,
		  "check-lisp-type" => \$check_lisp_type,
		  "gprof" => \$profile,
		  "malloc-check" => \$malloc_check,
		  "no-mcheck" => \$no_mcheck,
		  "alias" => \$aliasing,
                  "boot" => \$boot,
		  "wall" => \$wall,
		  "gcc3" => \$gcc3,
		  "trace-selection" => \$trace_selection,
		  "trace-move" => \$trace_move,
		  "stabs" => \$use_stabs,
		  "optim" => \$optim);

if ($rc == 0 || $help)
 {
   print <<USAGE;
make-emacs [options] ...

Build Emacs.

 --help			show this help
 --all			make clean versionclean first
 --boot			make bootstrap, log to boot.log
 --enable-checking	ENABLE_CHECKING=1
 --no-warn		disable warnings
 --check-marked		GC_CHECK_MARKED_OBJECTS=1
 --optim		no debug defines
 --gprof		make Emacs for profiling
 --check-lisp-type	define CHECK_LISP_OBJECT_TYPE
 --malloc-check		define GC_MALLOC_CHECK
 --no-mcheck		don't define GC_MCHECK
 --wall			compile with -Wall
 --gcc3			use GCC 3.0 (30% slower compilation, slower code)
 --trace-selection	print traces in xselect.c
 --trace-move		print traces for move_it* functions
 --stabs		use -gstabs instead -g

Default is to compile with warnings, with -DGC_MCHECK=1, and
with -DGLYPH_DEBUG=1.

USAGE
   exit 1;
 }

# Chdir to the top-level directory of the tree.  If not in a tree
# containing Emacs, use the default.

while (! -f "src/emacs.c" && cwd () ne "/")
  {
    chdir "..";
  }

chdir $root if cwd () eq "/";
chdir "./src";
print "Build in ", cwd (), "\n";

# If first arg is 'all' or if '--all' specified, ensure a clean
# build.

if (@ARGV && $ARGV[0] eq "all")
  {
    $all = 1;
    shift @ARGV;
  }

system ("$make clean") if $all;

if ($wall)
  {
    $warn = "-Wall";
  }
elsif (!$no_warn)
  {
    $warn = "-Wpointer-arith -Wchar-subscripts -Wformat -Wimplicit-int";
    $warn = "$warn -Wreturn-type -Wswitch -Wuninitialized";
  }

$defs = "-DGLYPH_DEBUG=1" unless $optim;
$defs = "$defs -DGC_CHECK_MARKED_OBJECTS=1" if $check_marked;
$defs = "$defs -DENABLE_CHECKING=1" if $enable_checking;

if ($profile)
  {
    $opts = "-pg";
    $defs = "$defs -DPROFILING=1";
  }
else
  {
    if ($use_stabs)
      {
	$opts = "-gstabs";
      }
    else
      {
	$opts = "-g";
      }
  }

$defs = "$defs -DCHECK_LISP_OBJECT_TYPE" if $check_lisp_type;
$defs = "$defs -DGC_MALLOC_CHECK=1 -DGC_PROTECT_MALLOC_STATE=1" if $malloc_check;
$defs = "$defs -DGC_MCHECK=1" unless $no_mcheck;

$defs = "$defs -DTRACE_SELECTION" if $trace_selection;
$defs = "$defs -DDEBUG_TRACE_MOVE" if $trace_move;

# arch=pentium leads to slightly faster code than without.
$opts = "$opts -march=pentiumpro";

if ($optim)
  {
    $opts = "$opts -pipe -O3";
  }
elsif ($no_optim)
  {
    $opts = "$opts -pipe -fno-inline";
  }
else
  {
    $opts = "$opts -O -pipe -fno-inline";
  }

$opts = "$opts -fstrict-aliasing" if $aliasing;

$opts = "$opts $defs" if $defs;
$opts = "$opts $warn" if $warn;

$cc = "/usr/bin/gcc";
$cc = "/gd/local/bin/gcc" if $gcc3;

if ($boot)
  {
    chdir "..";
    system "mv boot.log boot.log.old" if -f "boot.log";
    exit system "script boot.log $make CC=\"$cc\" CFLAGS=\"$opts\" bootstrap";
  }

exit system "$make CC=\"$cc\" CFLAGS=\"$opts\" @ARGV";

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