Initial Spring 2016 commit.

mk/os161.compile.mk

@@ -0,0 +1,75 @@
+#
+# OS/161 build environment: compile source files.
+#
+# Usage: use os161.prog.mk or os161.lib.mk
+#
+# Variables controlling this file:
+#
+# SRCS				.c and .S files to compile.
+#
+# Provides:
+#
+# OBJS				.o files from compilation.
+#
+
+# Objects list starts empty. It is added to below.
+OBJS=
+
+clean-local: cleancompile
+cleancompile:
+	rm -f $(MYBUILDDIR)/*.[oa]
+
+distclean-local: distcleancompile
+distcleancompile:
+	rm -f $(MYBUILDDIR)/.depend
+
+#
+# Depend: generate dependency information.
+# Use gcc's -M argument for this.
+#
+# Note that we use -M rather than -MM, to get both system headers
+# and program-local headers. This is because we *are* the system and
+# we might well change those system headers.
+#
+# The fixdepends script transforms the results by substituting some
+# make variables back into them; this way the depend files are
+# independent of (at least some of) the build configuration. It also
+# allows for placing the .o files in the build directory.
+#
+depend-local: $(MYBUILDDIR) .WAIT predepend .WAIT dependcompile
+dependcompile:
+	$(CC) $(CFLAGS) $(MORECFLAGS) -M $(SRCS) |\
+		$(TOP)/mk/fixdepends.sh '$(INSTALLTOP)' native \
+		> $(MYBUILDDIR)/.deptmp
+	mv -f $(MYBUILDDIR)/.deptmp $(MYBUILDDIR)/.depend
+
+.-include "$(MYBUILDDIR)/.depend"
+
+predepend:
+.PHONY: predepend
+
+tags: tagscompile
+tagscompile:
+	ctags -wtd $(SRCS) *.h
+
+#
+# Compile rules.
+# We can use the same rules for .c and .S because gcc knows how to handle
+# .S files.
+#
+# Make it so typing "make foo.o" does the right thing.
+#
+.for _S_ in $(SRCS:M*.[cS])
+OBJS+=$(MYBUILDDIR)/$(_S_:T:R).o
+$(MYBUILDDIR)/$(_S_:T:R).o: $(_S_)
+	$(CC) $(CFLAGS) $(MORECFLAGS) -c $(_S_) -o $(.TARGET)
+
+$(_S_:T:R).o: $(MYBUILDDIR)/$(_S_:T:R).o
+.PHONY: $(_S_:T:R).o
+.endfor
+
+# Make non-file rules PHONY.
+.PHONY: clean-local cleancompile distclean-local distcleancompile
+.PHONY: depend-local dependcompile tags tagscompile
+
+# End.