Add -MMD option

t/80_vppreproc.t

@@ -9,13 +9,13 @@ use IO::File;
 use strict;
 use Test::More;
 
-BEGIN { plan tests => 15 }
+BEGIN { plan tests => 24 }
 BEGIN { require "./t/test_utils.pl"; }
 
 print "Checking vppreproc...\n";
 
-vppreproc ("t/80_vppreproc_none.out",     "test_dir/vppreproc_none.v",	"");
-vppreproc ("t/80_vppreproc_cmped.out",    "test_dir/vppreproc_cmped.v",	"--nocomment --pedantic");
+vppreproc ("t/80_vppreproc_none.out",     "test_dir/vppreproc_none.v",    "");
+vppreproc ("t/80_vppreproc_cmped.out",    "test_dir/vppreproc_cmped.v",    "--nocomment --pedantic");
 vppreproc ("t/80_vppreproc_simple.out",   "test_dir/vppreproc_simple.v", "--simple");
 vppreproc ("t/80_vppreproc_defines.out",  "test_dir/vppreproc_defines.v", "--dump-defines");
 vppreproc ("t/80_vppreproc_rel_file.out", "test_dir/vppreproc_rel_file.v", "-f verilog/t_80_foo.f");
@@ -28,12 +28,57 @@ sub vppreproc {
     my $cmd = "${PERL} ./vppreproc ${flags} -y verilog inc2.v > $out";
 
     if (0 == run_system_no_die ($cmd)) {
-	pass("run command");
-	ok(-r $out, "vppreproc output from: $cmd");
-	ok(files_identical ($out, $checkname), "diff");
+        pass("run command");
+        ok(-r $out, "vppreproc output from: $cmd");
+        ok(files_identical ($out, $checkname), "diff");
     } else {
-	fail ("run command");
-	fail ("no output file created");
-	fail ("no output file to compare");
+        fail("run command");
+        fail("no output file created");
+        fail("no output file to compare");
     }
 }
+
+
+
+# Test -MMD -MP
+vppreproc_d("t/80_vppreproc_v_hier_top_mmd_mp.d", "-MMD -MP");
+vppreproc_d("t/80_vppreproc_v_hier_top_mmd.d", "-MMD");
+vppreproc_d_o();
+
+sub vppreproc_d {
+    my $checkname = shift;
+    my $flags = shift;
+    my $defaultcfg = "verilog/v_hier_top.v verilog/v_sv_intf.v +incdir+verilog";
+    my $cmd = "${PERL} ./vppreproc $flags $defaultcfg";
+    my $dotd = "verilog/v_hier_top.v.d";
+    if (0 == run_system_no_die($cmd)) {
+        pass("run command");
+        ok(-r $dotd, "vppreproc .d from: $cmd");
+        ok(files_identical ($dotd, $checkname), "diff");
+    } else {
+        fail("run command");
+        fail("no output file created");
+        fail("no output file to compare");
+    }
+    system("/bin/rm -f verilog/v_hier_top.v.d verilog/v_sv_intf.v.d");
+}
+
+sub vppreproc_d_o {
+    my $obasename = "res";
+    my $checkname = "t/80_vppreproc_v_res.d";
+    my $defaultcfg = "verilog/v_hier_top.v verilog/v_sv_intf.v +incdir+verilog";
+    my $cmd = "${PERL} ./vppreproc -MMD -o test_dir/$obasename.vpp $defaultcfg";
+    my $dotd = "test_dir/$obasename.d";
+
+    system("/bin/rm -f $dotd");
+    if (0 == run_system_no_die($cmd)) {
+        pass("run command");
+        ok(-r $dotd, "vppreproc .d from: $cmd");
+        ok(files_identical($dotd, $checkname), "diff");
+    } else {
+        fail("run command");
+        fail("no output file created");
+        fail("no output file to compare");
+    }
+}
+

t/80_vppreproc_v_hier_top_mmd.d

@@ -0,0 +1,3 @@
+# Generated by vppreproc
+
+verilog/v_hier_top.v.d: verilog/v_hier_top.v verilog/v_hier_inc.vh

t/80_vppreproc_v_hier_top_mmd_mp.d

@@ -0,0 +1,5 @@
+# Generated by vppreproc
+
+verilog/v_hier_top.v.d: verilog/v_hier_top.v verilog/v_hier_inc.vh
+
+verilog/v_hier_inc.vh:

t/80_vppreproc_v_res.d

@@ -0,0 +1,4 @@
+# Generated by vppreproc
+
+test_dir/res.vpp: verilog/v_hier_top.v verilog/v_hier_inc.vh
+test_dir/res.vpp: verilog/v_sv_intf.v verilog/v_sv_pkg.v

vppreproc

@@ -10,6 +10,7 @@ use lib "$RealBin";
 use Getopt::Long;
 use IO::File;
 use Pod::Usage;
+use File::Basename;
 
 use Verilog::Preproc;
 use Verilog::Getopt;
@@ -25,6 +26,8 @@ $Debug = 0;
 my $opt_output_filename = undef;
 my $opt_blank=1;
 my $opt_dump_defines;
+my $opt_mmd;
+my $opt_mp;
 my @opt_files;
 my @opt_pp_flags;
 
@@ -45,6 +48,8 @@ if (! GetOptions (
 		  "blank!"	=> \$opt_blank,
 		  "comment!"	=> sub { push @opt_pp_flags, (keep_comments=>$_[1]); },
 		  "dump-defines!" => \$opt_dump_defines,
+		  "MMD!" 	=> \$opt_mmd,
+		  "MP!" 	=> \$opt_mp,
 		  "line!"	=> sub { push @opt_pp_flags, (line_directives=>$_[1]); },
 		  "P!"		=> sub { $opt_blank=0; push @opt_pp_flags, (line_directives=>$_[1]); },
 		  "pedantic!"	=> sub { push @opt_pp_flags, (pedantic=>$_[1]); },
@@ -92,6 +97,54 @@ if ($opt_dump_defines) {
 	printf "`define %s%s %s\n", $name,$par,$value;
     }
 }
+
+# MMD MP option
+# produces a list of makefile dependency rules suitable for use by a make utility
+if ($opt_mmd) {
+	my $fh = IO::File->new;
+	if ($opt_output_filename) {
+		# Create a single .d
+		my ($filename, $dirs, $suffix) = File::Basename::fileparse($opt_output_filename, qr/\.[^.]*/);
+		my $opt_output_filename_d = File::Spec->canonpath("$dirs$filename.d");  # .d file
+		$fh->open(">$opt_output_filename_d") or die "%Error: $! $opt_output_filename_d\n";
+		printf $fh "# Generated by vppreproc\n\n"
+	} else {
+		# Create a .d for each input file
+	}
+	my %includes = %{$Opt->{includes}};
+	foreach my $target (sort (keys %includes)) {
+		my $dep_file; # MMD target
+		# Setup dep file
+		if ($opt_output_filename) {
+			$dep_file = $opt_output_filename;
+		} else {
+			$dep_file = "$target.d";
+			$fh->open(">$dep_file") or die "%Error: $! $dep_file\n";
+			printf $fh "# Generated by vppreproc\n\n"
+		}
+		# Create mmd dep
+		printf $fh "$dep_file: $target";
+		my @deps = (sort (keys %{$includes{$target}}));
+		foreach my $dep (@deps) {
+			$dep = File::Spec->canonpath($Opt->file_path($dep));
+			printf $fh " $dep";
+		}
+		printf $fh "\n";
+		# Create phony dependency targets (MP)
+		if ($opt_mp) {
+			foreach my $dep (@deps) {
+				$dep = File::Spec->canonpath($Opt->file_path($dep));
+				printf $fh "\n$dep:\n";
+			}
+		}
+		if (!$opt_output_filename){
+			$fh->close;
+		}
+	}
+	if ($opt_output_filename) {
+		$fh->close;
+	}
+}
 
 exit(0);
 
@@ -201,6 +254,14 @@ Use the given filename for output instead of stdout.
 Suppress normal output, and instead print a list of all defines existing at
 the end of processing the input file.
 
+=item --MMD
+
+Create .d dependency files, similar to "gcc -MMD" behavior.
+
+=item --MP
+
+Create phony dependency targets, similar to "gcc -MP" behavior.
+
 =item --noblank
 
 Removes empty lines from the output.  Should be used with --noline, as if