Build downloaded dependencies and link against them.

mingw/Makefile

 # Cross-compiling opus file under mingw
 
-TOOL_PREFIX ?= i686-w64-mingw32-
+TOOL_PREFIX ?= i686-w64-mingw32
 
 # To build opusfile under mingw, you need to first build:
 DEPS = ogg opus ssl
@@ -14,20 +14,26 @@ opus_URL := http://downloads.xiph.org/releases/opus/opus-1.1-beta.tar.gz
 opus_SHA := ec1784287f385aef994b64734aaecae04860e61aa50fc6eef6643fa7e40dd193
 
 ssl_URL := http://www.openssl.org/source/openssl-1.0.1e.tar.gz
-ssl_SHA := f74f15e8c8ff11aa3d5bb5f276d202ec18d7246e95f961db76054199c69c1ae3h
+ssl_SHA := f74f15e8c8ff11aa3d5bb5f276d202ec18d7246e95f961db76054199c69c1ae3
 
 libopusfile-0.dll: ../unix/Makefile $(DEPS)
-	CC=$(TOOL_PREFIX)gcc \
-	RANLIB=$(TOOL_PREFIX)ranlib \
+	CC=$(TOOL_PREFIX)-gcc \
+	RANLIB=$(TOOL_PREFIX)-ranlib \
 	PKG_CONFIG_PATH=${PWD}/lib/pkgconfig \
 	$(MAKE) -f $<
 
+opusfile: $(DEPS)
+	../configure --host=$(TOOL_PREFIX) --prefix=${PWD} \
+	  PKG_CONFIG_PATH=${PWD}/lib/pkgconfig
+	$(MAKE)
+
 clean:
 	$(RM) -r objs
 
 # Generate rules to download and verify each dependency.
 define WGET_template =
- $(1): $$(notdir $$($(1)_URL))
+$(1)_DIR := $$(basename $$(basename $$(notdir $$($(1)_URL))))
+ $(1)_DIR: $$(notdir $$($(1)_URL))
 	@if test "$$($(1)_SHA)" = "$$$$(sha256sum $$< | cut -f 1 -d ' ')"; \
 	then \
 	  echo "+ $$@ checksum verified."; \
@@ -38,9 +44,28 @@ define WGET_template =
 	tar xf $$<
  $$(notdir $$($(1)_URL)):
 	wget $$($(1)_URL)
+ $(1): $(1)_BUILD
 endef
 $(foreach dep,$(DEPS),$(eval $(call WGET_template,$(dep))))
 
+ogg_BUILD: $(ogg_DIR)
+	cd $< && ./configure --host=$(TOOL_PREFIX) --prefix=${PWD}
+	$(MAKE) -C $< check
+	$(MAKE) -C $< install
+
+opus_BUILD: $(opus_DIR)
+	cd $< && ./configure --host=$(TOOL_PREFIX) --prefix=${PWD}
+	$(MAKE) -C $< check
+	$(MAKE) -C $< install
+
+ssl_BUILD: $(ssl_DIR)
+	cd $< && ./Configure shared mingw64 no-asm \
+	  --prefix=${PWD} \
+	  --cross-compile-prefix=$(TOOL_PREFIX)-
+	$(MAKE) -C $< depend
+	$(MAKE) -C $<
+	$(MAKE) -C $< install
+
 # CROSS_COMPILE="i686-w64-mingw32-" ./Configure mingw no-asm no-shared --prefix=$PWD/mingw && make depend && make -j8 && make install