Initial Spring 2016 commit.

mk/os161.lib.mk

@@ -0,0 +1,84 @@
+#
+# OS/161 build environment: build a library
+#
+# Usage:
+#    TOP=../..
+#    .include "$(TOP)/mk/os161.config.mk"
+#    [defs go here]
+#    .include "$(TOP)/mk/os161.lib.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.
+#
+# CFLAGS			Compile flags.
+#
+# LIBDIR			Directory under $(OSTREE) to install into,
+#                               e.g. /lib. Should have a leading slash.
+#
+# Note that individual program makefiles should only *append* to
+# CFLAGS, not assign it. Otherwise stuff set by os161.config.mk will
+# get lost and bad things will happen.
+#
+# Because we only build static libs, we can't use and don't need
+# LDFLAGS, LIBS, or LIBDEPS. (Shared libs would want these.)
+#
+
+LIBDIR?=/lib
+
+_LIB_=lib$(LIB).a
+
+# We may want these directories created. (Used by os161.baserules.mk.)
+MKDIRS+=$(MYBUILDDIR)
+MKDIRS+=$(INSTALLTOP)$(LIBDIR)
+MKDIRS+=$(OSTREE)$(LIBDIR)
+
+# 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.compile.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: $(INSTALLTOP)$(LIBDIR) .WAIT $(INSTALLTOP)$(LIBDIR)/$(_LIB_)
+$(INSTALLTOP)$(LIBDIR)/$(_LIB_): $(MYBUILDDIR)/$(_LIB_)
+	rm -f $(.TARGET)
+	ln $(MYBUILDDIR)/$(_LIB_) $(.TARGET) || \
+	  cp $(MYBUILDDIR)/$(_LIB_) $(.TARGET)
+
+install-local: $(OSTREE)$(LIBDIR) $(MYBUILDDIR)/$(_LIB_)
+	@echo "Warning: manually installing library without relinking anything"
+	rm -f $(OSTREE)$(LIBDIR)/$(_LIB_)
+	ln $(MYBUILDDIR)/$(_LIB_) $(OSTREE)$(LIBDIR)/$(_LIB_) || \
+	  cp $(MYBUILDDIR)/$(_LIB_) $(OSTREE)$(LIBDIR)/$(_LIB_)
+
+# Build the library.
+$(MYBUILDDIR)/$(_LIB_): $(OBJS)
+	rm -f $(.TARGET)
+	$(AR) -cq $(.TARGET) $(OBJS)
+	$(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.