#!/bin/sh

if ! ./scripts/checkperl.sh
then
 exit 1
fi

perl -e '
 use strict;
 $|=1;
 sub check_gcc {
   my $f = shift;
   my $s = shift; 
   my $r = 0;
   print "Checking for GNU G++ $f.$s\n"; 
   if ( `g++ -v 2> g++.version && tail -n 1 g++.version` =~ / $f\.$s/ ) {
     `echo $f.$s >> g++.version`;
     `echo g++ >> g++.version`;
     $r = 1; 	
   } else {
     if (`g++$f$s -v 2> g++.version && tail -n 1 g++.version` =~ / $f\.$s/) {
       `echo $f.$s >> g++.version`;
       `echo g++$f$s >> g++.version`;
       $r = 1;
     }
   }
   print "No " if $r == 0;
   print "GNU G++ $f.$s found!\n";
   return $r;
 }
 sub check_make {
  print "Checking for GNU make\n";
  my $err = "No GNU make found.\nPlease install a version of GNU make!\n";
  my $make;
  if (`which gmake`) {
   $make = "gmake"; 
  } elsif ( `which make` ) {
   $make = "make";
  } else {
   print $err;
   exit(1); 
  }

  `sh -c "$make -v > make.version 2>/dev/null"`;
  if ( `cat make.version` =~ /GNU Make/ ) {
   `echo $make >> make.version`; 
  } else {
   print $err;
   exit(1); 
  } 
 }
 &check_make;
 print "Checking compiler version\n";
 # Accept any GNU g++ (the original check only accepted g++ 3.x; modern GCC
 # works fine with the legacy-C++ fixes applied). Write g++.version as
 # "<version>\ng++\n" - src/configure reads the last line as the compiler.
 my $ver = `g++ -dumpversion 2>/dev/null`;
 chomp $ver;
 if ( $ver eq "" ) {
  print "No GNU g++ compiler found!\nPlease install GNU G++!\n";
  exit(1);
 }
 `echo $ver > g++.version`;
 `echo g++ >> g++.version`;
 print "GNU G++ $ver found!\n";

 # -I. : scripts/config.pl does "use scripts::modules::file", which needs
 # "." on @INC. Perl 5.26+ dropped "." from the default @INC, so this
 # silently BEGIN-failed on modern Perl (the "yes" answer was never even
 # read - it happened to be harmless only because the committed glob.h
 # defaults were already correct).
 system("perl -I. \"scripts/config.pl\"");
 chdir("src");
 system("./configure ".join(" ", @ARGV));
 chdir("..");

 exit(0);
' `echo "$*" | sed "s/-//g"` 

if test -f err
then
 rm -f err
else
 echo You are ready to type gmake now!
fi