Convert Makefile to use vcpkg

Makefile

@@ -1,38 +1,44 @@
 # If RACK_DIR is not defined when calling the Makefile, default to two levels above
 RACK_DIR ?= ../..
 
+# Must include the VCV plugin Makefile framework
+include $(RACK_DIR)/arch.mk
+
+# Assume that `vcpkg install` has run so the dependencies from `vcpkg.json` are available
+# under `vcpkg_installed` in the source dir.
+
 PKGCONFIG= pkg-config
 PACKAGES= libusb-1.0 librtlsdr
 
+# Map VCVRack's arch.mk to vcpkg's triplet
+ifeq ($(ARCH_OS), lin)
+  TRIPLET := $(ARCH_CPU)-linux
+else ifeq ($(ARCH_OS), mac)
+  TRIPLET := $(ARCH_CPU)-osx
+else ifeq ($(ARCH_OS), win)
+  TRIPLET := $(ARCH_CPU)-windows
+else
+  $(error Unrecognized OS "$(ARCH_OS)")
+endif
+
+PKG_CONFIG_PATH = $(abspath vcpkg_installed)/$(TRIPLET)/lib/pkgconfig
+PKGCONFIG := $(abspath vcpkg_installed)/$(TRIPLET)/tools/pkgconf/pkgconf --with-path=$(PKG_CONFIG_PATH)
+
 # FLAGS will be passed to both the C and C++ compiler
-FLAGS += $(shell $(PKGCONFIG) --cflags $(PACKAGES))
+FLAGS += $(shell $(PKGCONFIG)  --cflags $(PACKAGES))
 CFLAGS +=
 CXXFLAGS +=
+LDFLAGS += $(shell $(PKGCONFIG)  --libs $(PACKAGES))
 
 # Add .cpp and .c files to the build
 SOURCES = $(wildcard src/*.cpp src/*.c src/*/*.cpp src/*/*.c)
 
-# Must include the VCV plugin Makefile framework
-include $(RACK_DIR)/arch.mk
-
-# Careful about linking to libraries, since you can't assume much about the user's environment and library search path.
-# Static libraries are fine.
-ifeq ($(ARCH), lin)
-	# WARNING: static compilation is broken on Linux
-	LDFLAGS +=$(shell $(PKGCONFIG) --libs $(PACKAGES))
-endif
-
-ifeq ($(ARCH), mac)
-	LDFLAGS +=$(shell $(PKGCONFIG) --variable=libdir libusb-1.0)/libusb-1.0.a
-	LDFLAGS +=$(shell $(PKGCONFIG) --variable=libdir librtlsdr)/librtlsdr.a
-endif
-
-ifeq ($(ARCH), win)
-	LDFLAGS +=$(shell $(PKGCONFIG) --variable=libdir librtlsdr)/librtlsdr_static.a
-	LDFLAGS +=$(shell $(PKGCONFIG) --variable=libdir libusb-1.0)/libusb-1.0.a
-endif
-
 DISTRIBUTABLES += $(wildcard LICENSE*) res
 
 # Include the VCV Rack plugin Makefile framework
 include $(RACK_DIR)/plugin.mk
+
+.PHONY: vcpkg
+
+vcpkg:
+	vcpkg install --no-print-usage

README.md

@@ -5,3 +5,13 @@ A voltage-controlled FM radio tuner for [VCVRack](https://vcvrack.com) supportin
 [Downloads](https://vcvrack.com/plugins.html#RTL_SDR)
 
 [![Build Status](https://travis-ci.org/WIZARDISHUNGRY/vcvrack-rtlsdr.svg?branch=master)](https://travis-ci.org/WIZARDISHUNGRY/vcvrack-rtlsdr)
+
+## Build
+
+Building a package requires the VCVRack source tree. You can either check out this module inside the `plugins` directory, or build with an explicit path like
+
+    make RACK_DIR=$HOME/src/vcvrack
+
+This branch can use [vcpkg](https://learn.microsoft.com/en-us/vcpkg/) to fetch dependencies, and requires that `vcpkg` already be installed. Before building, run
+
+    make vcpkg