Support out of source build with the wrapper configure.pl script

cmake/configure.pl

 #!/usr/bin/perl
-use Switch;
+use strict;
+use Cwd 'abs_path';
+use File::Basename;
 
-my $cmakeargs="";
-foreach $option (@ARGV)
+my $cmakeargs = "";
+
+# Find source root directory
+# Assume this script is in <srcroot>/cmake
+my $srcdir = dirname(dirname(abs_path($0)));
+
+foreach my $option (@ARGV)
 {
+
   if (substr ($option, 0, 2) == "--")
   {
     $option = substr($option, 2);
   }
+  if($option =~ /srcdir/)
+  {
+    $srcdir = substr($option,7);
+    next;
+  }
   if($option =~ /help/)
   {
-    system("cmake -LH");
+    system("cmake ${srcdir} -LH");
     exit(0);
   }
   if($option =~ /with-plugins=/)
   {
     my @plugins= split(/,/, substr($option,13));
-    foreach $p (@plugins)
+    foreach my $p (@plugins)
     {
       $p =~ s/-/_/g;
       $cmakeargs = $cmakeargs." -DWITH_".uc($p)."=1";
@@ -60,12 +73,12 @@ foreach $option (@ARGV)
     $cmakeargs = $cmakeargs." -DCMAKE_INSTALL_PREFIX=".$cmake_install_prefix;
     next;
   }
-  if ($options =~ /extra-charsets=all/)
+  if ($option =~ /extra-charsets=all/)
   {
     $cmakeargs = $cmakeargs." -DWITH_CHARSETS=all"; 
     next;
   }
-  if ($options =~ /extra-charsets=complex/)
+  if ($option =~ /extra-charsets=complex/)
   {
     $cmakeargs = $cmakeargs." -DWITH_CHARSETS=complex"; 
     next;
@@ -74,6 +87,7 @@ foreach $option (@ARGV)
   $option =~ s/-/_/g;
   $cmakeargs = $cmakeargs." -D".$option."=1";
 }
-print("configure.pl : calling cmake . $cmakeargs\n");
-my $rc = system("cmake . $cmakeargs");
+
+print("configure.pl : calling cmake $srcdir $cmakeargs\n");
+my $rc = system("cmake $srcdir $cmakeargs");
 exit($rc);