X-Git-Url: https://deadsoftware.ru/gitweb?p=odcread.git;a=blobdiff_plain;f=Makefile;h=415e3250cebaf0cde6ad7c7995e9f02e2ba2c42a;hp=260da917104710eaf8c5c5f7a0f6dca5c2015ed2;hb=cf88fc04686af2b4a34f9ccebc9f517cd83be491;hpb=067f77e22bace6d17204e3f1f677dd6a5ca6f563

diff --git a/Makefile b/Makefile
index 260da91..415e325 100644
--- a/Makefile
+++ b/Makefile
@@ -1,10 +1,15 @@
-MODULES := reader store alien typeregister textmodel fold typepath
+# Modules, each containing:
+#  * $(MODULE)/Make.inc -- makefile include
+#  * $(MODULE)/$(MODULE).h -- minimal "interface" header file
+#  * $(MODULE)/$(MODULE).ih -- internal/implementation header file
+#    (only to be included by sources within the module)
+#  * $(MODULE)/*.cc -- module source files
+MODULES := main reader store alien typeregister textmodel fold typepath
 
-# Add module directories to the include path
-CFLAGS += -I.
+CFLAGS := -I.
 
 # Variables for the modules to write to
-SRCS := odcread.cc
+SRCS := 
 
 # Include module definitions
 include $(patsubst %,%/Make.inc,$(MODULES))
@@ -13,22 +18,36 @@ include $(patsubst %,%/Make.inc,$(MODULES))
 odcread: $(SRCS:.cc=.o)
 	g++ -o $@ $^
 
-# This rule build an object (.o) from a source (.cc). It first builds a
-# dependency (.d) file which will ensure that the .o is rebuilt whenever the
-# header files included by the .cc are updated.
+%.o: %.cc
+	g++ $(CFLAGS) $< -c -o $@
+
+# For each implementation header (.ih) generate a dependency (.d) file which
+# will ensure that the compiled header (.ih.gch) is rebuilt whenever the header
+# files included by the .ih are updated.
 # The options given to GCC for this are as follows:
 #  -MM : calculate dependencies, but exclude system headers
 #  -MF : output dependencies to the given file
 #  -MP : generate "header.h:" rules to avoid errors on deletion of headers
 #  -MT : the main rule has the given target (to handle subdirs correctly)
 # The .d file is not an explicit target because it will need to be (re-)built
-# if and only if the .o needs to be rebuilt.
-%.o: %.cc
-	g++ $(CFLAGS) $< -MM -MF $*.d -MP -MT $@
-	g++ $(CFLAGS) $< -c -o $@
+# if and only if the .ih.gch needs to be rebuilt.
+%.ih.gch: %.ih
+	g++ $(CFLAGS) -x c++-header $< -MM -MF $(dir $@)module.d -MP -MT $@
+	g++ $(CFLAGS) -x c++-header $< -o $@
+
+# This rule build an object (.o) from a source (.cc). 
+# Each module has a .ih file that should be *the only* include from the .cc
+# files. These .ih files are pre-compiled to .ih.gch, and dependency caching
+# is based on the .ih files, not the .cc files.
+define depend_on_compiled_header
+$(patsubst %.cc,%.o,$(1)) : $(dir $(1))$(patsubst %/,%,$(dir $(1))).ih.gch
+endef
+$(foreach src,$(SRCS),$(eval $(call depend_on_compiled_header,$(src))))
 
 clean:
-	rm -f odcread *.d *.o */*.o */*.d
+	rm -f odcread *.o */*.o */*.d */*.ih.gch
 
 # Include the generated dependency files (if they exist)
--include $(SRCS:.cc=.d)
+-include $(patsubst %,%/module.d,$(MODULES))
+
+# TODO: rename all %/%.ih files to %/module.ih for simplicity of matching rules