# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1479246957 -3600
# Node ID 2ce83f67d8d330c17f814c193116efe97f9c8b3b
# Parent  27ac1971cb382b785f8e21dc14fa9af397c343a5
Added a debugging switch that causes a different Makefile to be used.

diff -r 27ac1971cb38 -r 2ce83f67d8d3 generator.py
--- a/generator.py	Tue Nov 15 19:12:12 2016 +0100
+++ b/generator.py	Tue Nov 15 22:55:57 2016 +0100
@@ -30,7 +30,7 @@
                      encode_symbol, encode_tablename, \
                      encode_type_attribute
 from os import listdir
-from os.path import isdir, join, split
+from os.path import exists, isdir, join, split
 from referencing import Reference
 
 def copy(source, target):
@@ -73,22 +73,37 @@
         self.optimiser = optimiser
         self.output = output
 
-    def to_output(self):
+    def to_output(self, debug=False):
 
         "Write the generated code."
 
         self.check_output()
         self.write_structures()
-        self.copy_templates()
+        self.copy_templates(debug)
 
-    def copy_templates(self):
+    def copy_templates(self, debug=False):
 
         "Copy template files to the generated output directory."
 
         templates = join(split(__file__)[0], "templates")
 
         for filename in listdir(templates):
-            copy(join(templates, filename), self.output)
+            target = self.output
+
+            # Handle debug resources.
+
+            if filename.endswith("-debug"):
+                if debug:
+                    target = join(self.output, filename[:-len("-debug")])
+                else:
+                    continue
+
+            # Handle non-debug resources.
+
+            if debug and exists(join(templates, "%s-debug" % filename)):
+                continue
+
+            copy(join(templates, filename), target)
 
     def write_structures(self):
 
diff -r 27ac1971cb38 -r 2ce83f67d8d3 lplc
--- a/lplc	Tue Nov 15 19:12:12 2016 +0100
+++ b/lplc	Tue Nov 15 22:55:57 2016 +0100
@@ -39,6 +39,7 @@
 
     verbose = "-v" in args
     reset = "-r" in args
+    debug = "-g" in args
 
     # Load the program.
 
@@ -71,7 +72,7 @@
         now = stopwatch("Optimisation", now)
 
         g = generator.Generator(i, o, "_generated")
-        g.to_output()
+        g.to_output(debug)
 
         now = stopwatch("Generation", now)
 
diff -r 27ac1971cb38 -r 2ce83f67d8d3 templates/Makefile-debug
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/templates/Makefile-debug	Tue Nov 15 22:55:57 2016 +0100
@@ -0,0 +1,14 @@
+SRC = exceptions.c main.c native.c ops.c progops.c progtypes.c $(wildcard src/*.c)
+OBJ = $(SRC:.c=.o)
+CFLAGS = -I. -g
+
+all: main
+
+clean:
+	rm -f main $(OBJ)
+
+main: $(OBJ)
+	$(CC) $(LDFLAGS) $(OBJ) -o $@
+
+.c.o:
+	$(CC) -c $(CFLAGS) $< -o $@