portability fix for xargs

record the arguments to ./configure
find all the full paths for build commands on build machine

webtools/tinderbox2/configure

@@ -79,10 +79,43 @@ $tinder_version = '0.09';
 @replacements = qw( 
 		    prefix cgibin_prefix html_prefix 
 		    builddir config_script
+		    xargs_single CONFIGURE_ARGS
 		    );
 
-@cmds = qw(perl);
+@cmds = (
 
+	 # commands tinderbox uses
+	 'perl',
+
+	 # these commands are used by the Makefile not by tinderbox
+
+	 'find',
+	 'egrep',
+	 'xargs',
+	 'rm',
+	 'echo',
+	 'mkdir',
+	 'chmod',
+
+	 );
+
+# xargs takes one of these arguments
+# this is very OS specific
+
+@XARGS_SINGLE_ARGS = ('-l1', '-L1', '-n1');
+
+
+@ORIG_ARGS = @ARGV;
+$PROGRAM = $0;
+
+$CONFIGURE_ARGS= (
+	    "# Configure was run like this:\n\n".
+	     "# \t".
+	     $PROGRAM.
+	     "\t\'".
+	     join ("\' \\\n\#\t\'", @ORIG_ARGS).
+	     "\'".
+	    "");
 
 Getopt::Long::config('require_order', 'auto_abbrev', 'ignore_case');
 
@@ -100,11 +133,47 @@ GetOptions(
 usage() if $help;
 
 
+for my $cmd (@cmds) {
+
+  my $variable = $cmd.'_cmd';
+
+  my $explicit_cmd = $$variable;
+
+  if ($explicit_cmd) {
+    # Use explicitly set command path if defined
+    $full_cmd = $explicit_cmd;
+  } else {
+
+    # Search for command in the $PATH and assume that this is in the
+    # same place on the machine where the files are installed.
+
+    $full_cmd=`which $cmd 2> /dev/null`;
+    chomp($full_cmd);
+
+    if ($? != 0) {
+      print STDERR "Could not find program: $cmd\n";
+      exit 9;
+  }
+  }
+
+  $CMD{$cmd} = $full_cmd;
+}
+
+my $arg;
+foreach $arg (@XARGS_SINGLE_ARGS) {
+    my $output = `$CMD{'echo'} /bin/true |   $CMD{'xargs'} $arg $CMD{'echo'}`;
+    if ($output eq "/bin/true\n") {
+	$xargs_single=$arg;
+	last;
+    }
+}
+
 # Build Makefile
 #------------------------------------------------------------
 # Build a makefile to copy our executables into place and perform
 # subsitutions on them.
 
+
 print STDERR "Building Makefile\n";
 
 open(MAKEFILE_IN, "<Makefile.in") or 
@@ -229,6 +298,10 @@ print CONFIG_SCRIPT <<EOF4;
 # This script is automatically generated by configure.
 # This script configures various global variables.
 
+
+$CONFIGURE_ARGS
+
+
 while (<>) {
   # Set the library search path with suitable interposing directories.
 
@@ -247,35 +320,22 @@ while (<>) {
   s!\#perlflags\#!$perl_flags!;
   s!\#tinder_version\#!$tinder_version!;
 
-  # Hard code various executable paths into the source for security reasons.
 EOF4
+    ;
 
-for my $cmd (@cmds) {
 
-  my $variable = $cmd.'_cmd';
-
-  my $explicit_cmd = $$variable;
-
-  if ($explicit_cmd) {
-    # Use explicitly set command path if defined
-    $full_cmd = $explicit_cmd;
-  } else {
-
-    # Search for command in the $PATH and assume that this is in the
-    # same place on the machine where the files are installed.
-
-    $full_cmd=`which $cmd 2> /dev/null`;
-    chomp($full_cmd);
-
-    if ($? != 0) {
-      print STDERR "Could not find program: $cmd\n";
-      exit 9;
-    }
-  }
-
-  print CONFIG_SCRIPT "  s!\#$cmd\#!$full_cmd!;";
+{
+    print CONFIG_SCRIPT "  # Hard code various executable paths into ";
+     print CONFIG_SCRIPT	"the source for security reasons.\n";
+	foreach $cmd (sort keys %CMD) {
+	    my $full_cmd = $CMD{$cmd};
+	    print CONFIG_SCRIPT "  s!\#$cmd\#!$full_cmd!;\n";
+	}
+	print CONFIG_SCRIPT "\n";
+	print CONFIG_SCRIPT "  s!\#xargs_single\#!$xargs_single!;\n";
 }
 
+
 print CONFIG_SCRIPT <<EOF5;
 
 } continue {