# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1485527237 -3600
# Node ID b99c11afb6f52a39d531c42bbcc596b69e5bab34
# Parent  df30d1a4d19ab3d48fb986c7f0f6e9c5da68b962
Configure the Makefile using generated secondary Makefiles, replacing the
debug-specific Makefile and permitting the selection of included source files.

diff -r df30d1a4d19a -r b99c11afb6f5 generator.py
--- a/generator.py	Wed Jan 25 00:03:08 2017 +0100
+++ b/generator.py	Fri Jan 27 15:27:17 2017 +0100
@@ -98,9 +98,10 @@
 
         self.check_output()
         self.write_structures()
-        self.copy_templates(debug)
+        self.write_scripts(debug)
+        self.copy_templates()
 
-    def copy_templates(self, debug=False):
+    def copy_templates(self):
 
         "Copy template files to the generated output directory."
 
@@ -108,20 +109,6 @@
 
         for filename in listdir(templates):
             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
-
             pathname = join(templates, filename)
 
             # Copy files into the target directory.
@@ -438,6 +425,34 @@
             f_signatures.close()
             f_code.close()
 
+    def write_scripts(self, debug):
+
+        "Write scripts used to build the program."
+
+        f_native = open(join(self.output, "native.mk"), "w")
+        f_options = open(join(self.output, "options.mk"), "w")
+        try:
+            if debug:
+                print >>f_options, "CFLAGS = -g"
+
+            # Identify native modules used by the program.
+
+            native_modules = ["native/common.c"]
+
+            for name in self.importer.modules.keys():
+                parts = name.split(".", 1)
+
+                # Identify source files to be built.
+
+                if parts[0] == "native":
+                    native_modules.append("native/%s.c" % parts[1])
+
+            print >>f_native, "SRC =", " ".join(native_modules)
+
+        finally:
+            f_native.close()
+            f_options.close()
+
     def make_literal_constant(self, f_decls, f_defs, n, constant):
 
         """
diff -r df30d1a4d19a -r b99c11afb6f5 templates/Makefile
--- a/templates/Makefile	Wed Jan 25 00:03:08 2017 +0100
+++ b/templates/Makefile	Fri Jan 27 15:27:17 2017 +0100
@@ -1,7 +1,10 @@
-SRC = exceptions.c main.c $(wildcard native/*.c) ops.c progops.c progtypes.c $(wildcard src/*.c)
+include native.mk
+include options.mk
+
+SRC += exceptions.c main.c ops.c progops.c progtypes.c $(wildcard src/*.c)
 OBJ = $(SRC:.c=.o)
-CFLAGS = -Wall -I. -finput-charset=UTF-8
-LDFLAGS = -lm -lgc
+CFLAGS += -Wall -I. -finput-charset=UTF-8
+LDFLAGS += -lm -lgc
 
 ifdef ARCH
 CC := $(ARCH)-$(CC)
diff -r df30d1a4d19a -r b99c11afb6f5 templates/Makefile-debug
--- a/templates/Makefile-debug	Wed Jan 25 00:03:08 2017 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,19 +0,0 @@
-SRC = exceptions.c main.c $(wildcard native/*.c) ops.c progops.c progtypes.c $(wildcard src/*.c)
-OBJ = $(SRC:.c=.o)
-CFLAGS = -Wall -I. -finput-charset=UTF-8 -g
-LDFLAGS = -lm -lgc
-
-ifdef ARCH
-CC := $(ARCH)-$(CC)
-endif
-
-all: main
-
-clean:
-	rm -f main $(OBJ)
-
-main: $(OBJ)
-	$(CC) $(LDFLAGS) $(OBJ) -o $@
-
-.c.o:
-	$(CC) -c $(CFLAGS) $< -o $@