Initial Spring 2016 commit.

mk/os161.hostlib.mk

@@ -0,0 +1,78 @@
+#
+# OS/161 build environment: build a library for the compile host
+#
+# Usage:
+#    TOP=../..
+#    .include "$(TOP)/mk/os161.config.mk"
+#    [defs go here]
+#    .include "$(TOP)/mk/os161.hostlib.mk"
+#    [any extra rules go here]
+#
+# Variables controlling this file:
+#
+# LIB				Name of library. We create lib$(LIB).a.
+# SRCS				.c and .S files to compile.
+#
+# HOST_CFLAGS			Compile flags.
+#
+# Note that individual program makefiles should only *append* to
+# HOST_CFLAGS, not assign it. Otherwise stuff set by os161.config.mk
+# will get lost and bad things will happen.
+#
+# Because we only build static libs, we can't use and don't need
+# LDFLAGS or LIBS. (Shared libs would want these.)
+#
+# Note that there's no HOSTLIBDIR; host libs are always put in
+# $(TOOLDIR)/hostlib and do not end up in $(OSTREE).
+#
+
+_LIB_=lib$(LIB).a
+
+# We may want these directories created. (Used by os161.baserules.mk.)
+MKDIRS+=$(MYBUILDDIR)
+MKDIRS+=$(TOOLDIR)/hostlib
+
+# Default rule: create the program.
+# (In make the first rule found is the default.)
+all: all-local
+all-local: $(MYBUILDDIR) .WAIT $(MYBUILDDIR)/$(_LIB_)
+
+# Now get rules to compile the SRCS.
+.include "$(TOP)/mk/os161.hostcompile.mk"
+
+# Further rules for libraries.
+
+#
+# Install: we can install into either $(INSTALLTOP) or $(OSTREE).
+# When building the whole system, we always install into the staging
+# area. We provide the same direct install that os161.prog.mk
+# provides; however, because it this doesn't relink anything using the
+# library it generally isn't a very useful thing to do. Hence the
+# warning.
+#
+# Note that we make a hard link instead of a copy by default to reduce
+# overhead.
+#
+install-staging-local: $(TOOLDIR)/hostlib .WAIT $(TOOLDIR)/hostlib/$(_LIB_)
+$(TOOLDIR)/hostlib/$(_LIB_): $(MYBUILDDIR)/$(_LIB_)
+	rm -f $(.TARGET)
+	ln $(MYBUILDDIR)/$(_LIB_) $(.TARGET) || \
+	  cp $(MYBUILDDIR)/$(_LIB_) $(.TARGET)
+
+install-local:
+	@echo "Nothing to manually install"
+
+# Build the library.
+$(MYBUILDDIR)/$(_LIB_): $(HOST_OBJS)
+	rm -f $(.TARGET)
+	$(HOST_AR) -cq $(.TARGET) $(HOST_OBJS)
+	$(HOST_RANLIB) $(.TARGET)
+
+# Mark targets that don't represent files PHONY, to prevent various
+# lossage if files by those names appear.
+.PHONY: all all-local install-staging-local install-local
+
+# Finally, get the shared definitions for the most basic rules.
+.include "$(TOP)/mk/os161.baserules.mk"
+
+# End.