Add OpenOCD (and libusb) as another target

You can now ask to build "*-gcc" to just get the GCC builds, or
"*-openocd" to just get the OpenOCD builds.

.gitmodules

@@ -4,3 +4,9 @@
 [submodule "src/libexpat"]
 	path = src/libexpat
 	url = git://github.com/libexpat/libexpat
+[submodule "src/riscv-openocd"]
+	path = src/riscv-openocd
+	url = git://github.com/riscv/riscv-openocd.git
+[submodule "src/libusb"]
+	path = src/libusb
+	url = git://github.com/libusb/libusb.git

Makefile

@@ -17,20 +17,30 @@ OBJ_UBUNTU := $(OBJDIR)/$(UBUNTU)
 OBJ_WIN64  := $(OBJDIR)/$(WIN64)
 
 SRC_RGT := $(SRCDIR)/riscv-gnu-toolchain
+SRC_ROCD := $(SRCDIR)/riscv-openocd
 SRC_EXPAT := $(SRCDIR)/libexpat/expat
 SRC_ZLIB := $(SRCDIR)/zlib
+SRC_LIBUSB := $(SRCDIR)/libusb
 
 # The version that will be appended to the various tool builds.
 RGT_VERSION ?= $(shell cd $(SRC_RGT); git describe --tags | sed s/^v//g)
+ROCD_VERSION ?= $(shell cd $(SRC_ROCD); git describe --tags | sed s/^v//g)
 
 # The actual output of this repository is a set of tarballs.
-.PHONY: win64
+.PHONY: windows windows-openocd windows-gcc
-win64: $(BINDIR)/riscv64-unknown-elf-gcc-$(RGT_VERSION)-$(WIN64).zip
+win64: win64-openocd win64-gcc
-win64: $(BINDIR)/riscv64-unknown-elf-gcc-$(RGT_VERSION)-$(WIN64).tar.gz
+win64-gcc: $(BINDIR)/riscv64-unknown-elf-gcc-$(RGT_VERSION)-$(WIN64).zip
-win64: $(BINDIR)/riscv64-unknown-elf-gcc-$(RGT_VERSION)-$(WI64).src.tar.gz
+win64-gcc: $(BINDIR)/riscv64-unknown-elf-gcc-$(RGT_VERSION)-$(WIN64).tar.gz
-.PHONY: ubuntu
+win64-gcc: $(BINDIR)/riscv64-unknown-elf-gcc-$(RGT_VERSION)-$(WIN64).src.tar.gz
-ubuntu: $(BINDIR)/riscv64-unknown-elf-gcc-$(RGT_VERSION)-$(UBUNTU).tar.gz
+win64-openocd: $(BINDIR)/riscv-openocd-$(ROCD_VERSION)-$(WIN64).zip
-ubuntu: $(BINDIR)/riscv64-unknown-elf-gcc-$(RGT_VERSION)-$(UBUNTU).src.tar.gz
+win64-openocd: $(BINDIR)/riscv-openocd-$(ROCD_VERSION)-$(WIN64).tar.gz
+win64-openocd: $(BINDIR)/riscv-openocd-$(ROCD_VERSION)-$(WIN64).src.tar.gz
+.PHONY: ubuntu ubuntu-gcc ubuntu-openocd
+ubuntu: ubuntu-gcc ubuntu-openocd
+ubuntu-gcc: $(BINDIR)/riscv64-unknown-elf-gcc-$(RGT_VERSION)-$(UBUNTU).tar.gz
+ubuntu-gcc: $(BINDIR)/riscv64-unknown-elf-gcc-$(RGT_VERSION)-$(UBUNTU).src.tar.gz
+ubuntu-openocd: $(BINDIR)/riscv-openocd-$(ROCD_VERSION)-$(UBUNTU).tar.gz
+ubuntu-openocd: $(BINDIR)/riscv-openocd-$(ROCD_VERSION)-$(UBUNTU).src.tar.gz
 
 # FIXME: Check to see if the Windows tools should be built based on the
 # presence of the Windows cross compiler.
@@ -39,7 +49,7 @@ all: ubuntu
 
 # Some special riscv-gnu-toolchain configure flags for specific targets.
 i686-w64-mingw32-rgt-configure   := --without-system-zlib
-i686-w64-mingw32-rocd-vars       := LIBUSB1_LIBS="-L$(abspath $(OBJ_WIN64)/install/riscv-openocd-$(RGT_VERSION)-$(WIN64))/lib"
+i686-w64-mingw32-rocd-vars       := LIBUSB1_LIBS="-L$(abspath $(OBJ_WIN64)/install/riscv-openocd-$(ROCD_VERSION)-$(WIN64))/lib"
 
 # There's enough % rules that make starts blowing intermediate files away.
 .SECONDARY:
@@ -108,6 +118,69 @@ $(OBJDIR)/%/build/expat/configure:
 	cd $(dir $@); ./buildconf.sh
 	touch -c $@
 
+# The OpenOCD builds go here
+$(BINDIR)/riscv-openocd-$(ROCD_VERSION)-%.zip: \
+		$(OBJDIR)/%/stamps/riscv-openocd/install.stamp
+	$(eval $@_TARGET := $(patsubst $(BINDIR)/riscv-openocd-$(ROCD_VERSION)-%.zip,%,$@))
+	mkdir -p $(dir $@)
+	cd $(OBJDIR)/$($@_TARGET)/install; zip -r $(abspath $@) riscv-openocd-$(ROCD_VERSION)-$($@_TARGET)
+
+$(BINDIR)/riscv-openocd-$(ROCD_VERSION)-%.tar.gz: \
+		$(OBJDIR)/%/stamps/riscv-openocd/install.stamp
+	$(eval $@_TARGET := $(patsubst $(BINDIR)/riscv-openocd-$(ROCD_VERSION)-%.tar.gz,%,$@))
+	mkdir -p $(dir $@)
+	tar -C $(OBJDIR)/$($@_TARGET)/install -c riscv-openocd-$(ROCD_VERSION)-$($@_TARGET) | gzip > $(abspath $@)
+
+$(BINDIR)/riscv-openocd-$(ROCD_VERSION)-%.src.tar.gz: \
+		$(OBJDIR)/%/stamps/riscv-openocd/install.stamp
+	$(eval $@_TARGET := $(patsubst $(BINDIR)/riscv-openocd-$(ROCD_VERSION)-%.src.tar.gz,%,$@))
+	mkdir -p $(dir $@)
+	tar -C $(OBJDIR)/$($@_TARGET)/build -c . | gzip > $(abspath $@)
+
+$(OBJDIR)/%/stamps/riscv-openocd/install.stamp: \
+		$(OBJDIR)/%/stamps/libusb/install.stamp \
+		$(OBJDIR)/%/build/riscv-openocd/configure
+	$(eval $@_TARGET := $(patsubst $(OBJDIR)/%/stamps/riscv-openocd/install.stamp,%,$@))
+	$(eval $@_BUILD := $(patsubst %/stamps/riscv-openocd/install.stamp,%/build/riscv-openocd,$@))
+	$(eval $@_INSTALL := $(patsubst %/stamps/riscv-openocd/install.stamp,%/install/riscv-openocd-$(ROCD_VERSION)-$($@_TARGET),$@))
+	mkdir -p $($@_BUILD)
+	cd $($@_BUILD); $($($@_TARGET)-rocd-vars) ./configure --prefix=$(abspath $($@_INSTALL)) --host=$($@_TARGET) --enable-remote-bitbang --disable-werror --enable-ftdi
+	$(MAKE) -C $($@_BUILD)
+	$(MAKE) -C $($@_BUILD) install
+	mkdir -p $(dir $@)
+	date > $@
+
+$(OBJDIR)/%/build/riscv-openocd/configure:
+	rm -rf $(dir $@)
+	mkdir -p $(dir $@)
+	cp -r $(SRC_ROCD)/* $(dir $@)
+	cd $(dir $@); autoreconf -i
+	touch -c $@
+
+# Use the host libusb unless we expect there to be none
+$(OBJ_WIN64)/stamps/riscv-openocd/install.stamp: \
+		$(OBJ_WIN64)/stamps/libusb/install.stamp
+
+# OpenOCD needs libusb
+$(OBJDIR)/%/stamps/libusb/install.stamp: \
+		$(OBJDIR)/%/build/libusb/configure
+	$(eval $@_TARGET := $(patsubst $(OBJDIR)/%/stamps/libusb/install.stamp,%,$@))
+	$(eval $@_BUILD := $(patsubst %/stamps/libusb/install.stamp,%/build/libusb,$@))
+	$(eval $@_INSTALL := $(patsubst %/stamps/libusb/install.stamp,%/install/riscv-openocd-$(ROCD_VERSION)-$($@_TARGET),$@))
+	mkdir -p $($@_BUILD)
+	cd $($@_BUILD); ./configure --prefix=$(abspath $($@_INSTALL)) --host=$($@_TARGET) --disable-udev
+	$(MAKE) -C $($@_BUILD)
+	$(MAKE) -C $($@_BUILD) install
+	mkdir -p $(dir $@)
+	date > $@
+
+$(OBJDIR)/%/build/libusb/configure:
+	rm -rf $(dir $@)
+	mkdir -p $(dir $@)
+	cp -r $(SRC_LIBUSB)/* $(dir $@)
+	cd $(dir $@); ./autogen.sh --disable-udev
+	touch -c $@
+
 # Targets that don't build anything
 .PHONY: clean
 clean::

src/libusb

@@ -0,0 +1 @@
+Subproject commit 448eb4e38e8e3e1e2f0cd3ba8cefe64fcc6e1326

src/riscv-openocd

@@ -0,0 +1 @@
+Subproject commit 11008baee3c5e9b10056b28d5b1aac86e7eef37c