build: Use build macros for mediaconv.

make/rules-cargo.mk

@@ -0,0 +1,22 @@
+# parameters:
+#   $(1): lowercase package name
+#   $(2): uppercase package name
+#   $(3): 32/64, build type
+#
+define create-rules-cargo
+$(call create-rules-common,$(1),$(2),$(3))
+
+ifeq ($(CONTAINER),1)
+$(OBJ)/.$(1)-configure$(3):
+	@echo ":: configuring $(3)bit $(1)..." >&2
+	touch $$@
+
+$(OBJ)/.$(1)-build$(3):
+	@echo ":: building $(3)bit $(1)..." >&2
+	cd $$($(2)_SRC) && env $$($(2)_ENV$(3)) \
+	cargo build --target "$$(ARCH$(3))-unknown-linux-gnu" --target-dir $$($(2)_OBJ$(3)) $$(CARGO_BUILD_ARG)
+	touch $$@
+endif
+endef
+
+rules-cargo = $(call create-rules-cargo,$(1),$(call toupper,$(1)),$(2))

make/rules-common.mk

@@ -57,6 +57,8 @@ all: $(1)
 
 
 $(2)_ENV$(3) = \
+    CARGO_HOME=$$(OBJ)/.cargo \
+    CARGO_TARGET_$$(call toupper,$$(ARCH$(3))-unknown-linux-gnu)_LINKER="$$(ARCH$(3))-linux-gnu-gcc" \
     CCACHE_BASEDIR="$$(CCACHE_BASEDIR)" \
     STRIP="$$(STRIP)" \
     CC="$$(CCACHE_BIN) $$(ARCH$(3))-linux-gnu-gcc" \