use File::Spec ;
use File::Find ;
use Cwd ;

$win32 = ($^O eq 'MSWin32') ;

my $prefix  ;
my $prefix2  ;
my $libs  ;
my $libs2  ;
my $cflags  ;
my $cflags2  ;
my $version ;
my $version2 ;

if (!$win32)
    {
    if (!open (C, "xml2-config --version|"))
        {
        print "Cannot execute xml2-config ($!). libxml2 and libxslt will not be linked into Embperl\n" ;
        return undef ;
        }
    chomp ($version = <C>)  or die ("Cannot execute xml2-config to get version.") ;
    close C ;

    open C, "xml2-config --prefix --libs --cflags|" or die ("Cannot execute xml2-config ($!).") ;
    chomp ($prefix = <C>) ;
    chomp ($libs = <C>) ;
    chomp ($cflags = <C>) ;
    close C ;

    print "Found libxml2 $version installed under $prefix\n" ;

    if (!open (C, "xslt-config --version|"))
        {
        print "Cannot execute xslt-config ($!). libxml2 and libxslt will not be linked into Embperl\n" ;
        return undef ;
        }
    chomp ($version2 = <C>)  or die ("Cannot execute xslt-config to get version.") ;
    close C ;

    open C, "xslt-config --prefix --libs |" or die ("Cannot execute xslt-config ($!).") ;
    chomp ($prefix2 = <C>) ;
    chomp ($libs2 = <C>) ;
    close C ;

    open C, "xslt-config --cflags|" or die ("Cannot execute xslt-config ($!).") ;
    chomp ($cflags2 = <C>) ;
    close C ;

    print "Found libxslt $version2 installed under $prefix2\n" ;
    
    
    return { cflags => "$cflags $cflags2", 
             libs => "$libs $libs2", 
             inc => $prefix eq $prefix2?"-I$prefix/include":"-I$prefix/include -I$prefix2/include",
             defines => '-DLIBXSLT',
             objects => 'driver/eplibxslt$(OBJ_EXT)',
             save    => { '$LIBXSLTVERSION' => $version2 }} ;
    }


$path = $ENV{LIBXSLTPATH} || GetString ("Enter path of the directory where you have extracted libxml2 and libxslt or single dot for not using libxml", $LIBXSLTPATH) ;

return undef if (!$path || $path eq '.') ;

my $currdir = Cwd::fastcwd ;

eval { find (\&libxslt, $path) ; } ;
$@ = '' ;
chdir ($currdir);
if (!$libxslt)
    {
    print "libxslt.lib library not found under $path\n" ;
    return undef ;
    }

eval { find (\&libxml2, $path) ; } ;
$@ = '' ;
chdir ($currdir);
if (!$libxml2)
    {
    print "libxml2.lib library not found under $path\n" ;
    return undef ;
    }

eval { find (\&iconv, $path) ; } ;
$@ = '' ;
chdir ($currdir);
if (!$iconv)
    {
    print "iconv.lib library not found under $path\n" ;
    return undef ;
    }

$path = File::Spec -> canonpath ($path) ;
$inc1 = File::Spec -> canonpath ("$libxsltpath/../include") ;
$inc2 = File::Spec -> canonpath ("$libxml2path/../include") ;
$inc3 = File::Spec -> canonpath ("$iconvpath/../include") ;

print "libxslt and libxml2 found under $libxsltpath and $libxml2path\n" ;

return { 
         libs => "-L\"$libxsltpath\" -L\"$libxml2path\"  -L\"$iconvpath\" -l$libxslt -l$libxml2 -l$iconv", 
         cflags => "-I\"$inc1\" -I\"$inc2\" -I\"$inc3\"",
         defines => '-DLIBXSLT',
         objects => 'driver/eplibxslt$(OBJ_EXT)',
         save    => { 
                    '$LIBXSLTVERSION' => '2x',
                    '$LIBXSLTPATH'    => $path,
                     }} ;



sub libxslt

    {
    if ($File::Find::dir ne $path && (($File::Find::dir =~ m#/\.#) || ($File::Find::dir !~ /libxslt/)))
        {
        $File::Find::prune = 1 ;
        return ;
        } 

    if (/^libxslt\.lib/i)
        {
        $libxsltpath = $File::Find::dir ;
        die $libxslt = $_ ;
        }
    }


sub libxml2

    {
    if ($File::Find::dir ne $path && (($File::Find::dir =~ m#/\.#) || ($File::Find::dir !~ /libxml2/)))
        {
        $File::Find::prune = 1 ;
        return ;
        } 

    if (/^libxml2\.lib/i)
        {
        $libxml2path = $File::Find::dir ;
        die $libxml2 = $_ ;
        }
    }



sub iconv

    {
    if ($File::Find::dir ne $path && (($File::Find::dir =~ m#/\.#) || ($File::Find::dir !~ /iconv/)))
        {
        $File::Find::prune = 1 ;
        return ;
        } 

    if (/^iconv\.lib/i)
        {
        $iconvpath = $File::Find::dir ;
        die $iconv = $_ ;
        }
    }






print "libxml2/libxslt is currently not supported on Win32\n" ;
return undef ;