#!/usr/bin/perl

# Configure trapasm - faking an autotools configure script for RPM builds
#
# The configuration only affects the paths where the Makefile will install
# the executables and the `asm_mimd.inc` include file, and where the
# executables will search for the include files for trapcc and trapasm.
#
# bindir   (default: ${prefix}/bin)        - executables
# datadir  (default: {$prefix/share/trap}) - used to build ${trapdir}
# trapdir  (default: {$datadir/trap})      - asm_mimd.inc
# trapinc  (default: ${trapdir})           - search path for include files


# Parse options and store in hash 'opt'
while ($arg = shift) {

  $prefix  = $1 if ($arg =~ '^--prefix=(.*)');
  $bindir  = $1 if ($arg =~ '^--bindir=(.*)');
  $datadir = $1 if ($arg =~ '^--datadir=(.*)');
  $trapdir = $1 if ($arg =~ '^--trapdir=(.*)');
  $trapinc = $1 if ($arg =~ '^--trapinc=(.*)');

  # any other options are ignored
}

# Default values
$prefix  = "/usr/local"    unless defined $prefix;
$bindir  = "$prefix/bin"   unless defined $bindir;
$datadir = "$prefix/share" unless defined $datadir;
$trapdir = "$datadir/trap" unless defined $trapdir;
$trapinc = "$trapdir"      unless defined $trapinc;

# Print configuration values
print <<EOF;
configuration settings:
PREFIX=$prefix
BINDIR=$bindir
DATADIR=$datadir
TRAPDIR=$trapdir
TRAPINC=$trapinc
EOF

# Check validity of config values
foreach $i ("config.inc", "conf_va.inc") {
  die "Include file '$i' not found in '$trapinc'" unless ( -e "$trapinc/$i" );
}

print("generate config files: ");

# Generate include makefile
open CONFIG_MK, ">config.mk";
print CONFIG_MK <<EOF;
PREFIX=$prefix
BINDIR=$bindir
DATADIR=$datadir
TRAPDIR=$trapdir
TRAPINC=$trapinc
EOF
close CONFIG_MK;
print("config.mk ");

# Generate pascal include file
open CONFIG_PAS, ">config.inc.pas";
# print CONFIG_PAS "TRAPDIR = '".$opt{'trapdir'}."';\n";
print CONFIG_PAS "defaults_file : PathStr = '$trapinc/asm_mimd.inc';\n";
close CONFIG_PAS;
print("config.inc.pas\n");