Failing to build VCV-Recorder plugin

Hi, i’m trying to build the most recent version of the VCV-Recorder plugin. Building VCV itself works. I installed yasm, since it’s needed for building the plugin. I cloned the repo and changed the makefile. I think i did something wrong here, but i am not sure whether this is the problem. Here it is:

RACK_DIR ?= ../..

include $(RACK_DIR)/

FLAGS += -Idep/include
ifdef ARCH_LIN
	# No idea what this does. Recommended by
	LDFLAGS += -Wl,-Bsymbolic
ifdef ARCH_WIN
	# Windows DLLs need to link explicitly to other DLLs
	LDFLAGS += -lopengl32 -lbcrypt
ifdef ENABLE_H264

SOURCES += $(wildcard src/*.cpp)


ffmpeg := dep/lib/libavcodec.a
lame := dep/lib/libmp3lame.a
libopus := dep/lib/libopus.a
x264 := dep/lib/libx264.a
DEPS += $(ffmpeg)

# Order matters here
OBJECTS += dep/lib/libavformat.a
OBJECTS += dep/lib/libavcodec.a
OBJECTS += dep/lib/libavutil.a
OBJECTS += dep/lib/libswscale.a
OBJECTS += $(lame)
OBJECTS += $(libopus)
ifdef ENABLE_H264
	OBJECTS += $(x264)

# ffmpeg
# ffmpeg's configure script doesn't respect --prefix for finding dependencies, so add the paths manually here
DEP_FLAGS += Rack/plugins/VCV-Recorder/dep/include
DEP_LDFLAGS += Rack/plugins/VCV-Recorder/dep/lib

FFMPEG_FORMATS += --enable-muxer=wav --enable-encoder=pcm_s16le --enable-encoder=pcm_s24le
FFMPEG_FORMATS += --enable-muxer=aiff --enable-encoder=pcm_s16be --enable-encoder=pcm_s24be
FFMPEG_FORMATS += --enable-libmp3lame --enable-muxer=mp3 --enable-encoder=libmp3lame
FFMPEG_FORMATS += --enable-libopus --enable-muxer=opus --enable-encoder=libopus
FFMPEG_FORMATS += --enable-muxer=flac --enable-encoder=flac
FFMPEG_FORMATS += --enable-muxer=ipod --enable-encoder=alac
FFMPEG_FORMATS += --enable-muxer=mpeg1system --enable-encoder=mpeg2video --enable-encoder=mp2
FFMPEG_FORMATS += --enable-muxer=avi --enable-encoder=huffyuv
FFMPEG_FORMATS += --enable-muxer=avi --enable-encoder=ffv1
ifdef ENABLE_H264
	FFMPEG_FORMATS += --enable-libx264 --enable-muxer=mp4 --enable-encoder=libx264 --enable-encoder=aac
# VP8/9 software encoding is too slow for it to be useful for anyone.
# FFMPEG_FORMATS += --enable-libvpx --enable-muxer=webm --enable-encoder=libvpx_vp8
ifdef ARCH_MAC
# 	FFMPEG_FORMATS += --enable-videotoolbox --enable-muxer=mp4 --enable-encoder=h264_videotoolbox --enable-encoder=mp2

FFMPEG_DEPS += $(lame) $(libopus)
ifdef ENABLE_H264
	FFMPEG_DEPS += $(x264)

$(ffmpeg): $(FFMPEG_DEPS)
	# Don't use $(CONFIGURE) because this is a handwritten configure script
	# ffmpeg bug: The pkgconfig dir is not set from pkgconfigdir at all. Set it with PKG_CONFIG_PATH instead.
	cd ffmpeg && PKG_CONFIG_PATH="Rack/plugins/VCV-Recorder/lib/pkgconfig" ./configure --prefix="Rack/plugins/VCV-Recorder/dep" --enable-pic --enable-gpl \
		--disable-programs --disable-doc --disable-avdevice --disable-swresample --disable-postproc --disable-avfilter --disable-network --disable-iconv --disable-alsa --disable-autodetect --disable-everything \
		--enable-protocol=file \
	cd ffmpeg && $(MAKE)
	cd ffmpeg && $(MAKE) install

# lame
	# Use -nc because Sourceforce mirrors don't understand -c if the file already exists
	$(WGET) -nc ""
	$(SHA256) lame-3.100.tar.gz ddfe36cab873794038ae2c1210557ad34857a4b6bdc515785d1da9e175b1da1e
	cd dep && $(UNTAR) ../lame-3.100.tar.gz
	# Remove nonexistent symbol from symbols list
	cd dep && $(SED) "s/lame_init_old\n//g" lame-3.100/include/libmp3lame.sym
	cd dep/lame-3.100 && $(CONFIGURE) --enable-nasm --disable-gtktest --disable-decoder --disable-frontend --enable-shared=no
	cd dep/lame-3.100 && $(MAKE) install

# libopus
	$(WGET) ""
	$(SHA256) opus-1.3.1.tar.gz 65b58e1e25b2a114157014736a3d9dfeaad8d41be1c8179866f144a2fb44ff9d
	cd dep && $(UNTAR) ../opus-1.3.1.tar.gz
	# For some reason, we need to manually specify PIC on Windows. `--with-pic` doesn't seem to work.
	cd dep/opus-1.3.1 && CFLAGS="-fPIC" $(CONFIGURE) --enable-shared=no --enable-static=yes --disable-extra-programs
	cd dep/opus-1.3.1 && $(MAKE) install

# x264
X264_COMMIT := cde9a93319bea766a92e306d69059c76de970190
	$(WGET) "$(X264_COMMIT)/x264-$(X264_COMMIT).tar.gz"
	$(SHA256) x264-$(X264_COMMIT).tar.gz 8515baba9f82c723e07252747e9b0e166a16091ba72f2017387641724baec02d
	cd dep && $(UNTAR) ../x264-$(X264_COMMIT).tar.gz
	cd dep/x264-$(X264_COMMIT) && $(CONFIGURE) --disable-cli --enable-static --enable-pic
	cd dep/x264-$(X264_COMMIT) && $(MAKE) install

include $(RACK_DIR)/

When i “make” i get this error:

make: *** Keine Regel vorhanden, um das Ziel „dep/lib/libavformat.a“,
  benötigt von „plugin.dll“, zu erstellen.  Schluss.
make: *** Es wird auf noch nicht beendete Prozesse gewartet....
g++ -std=c++11 -Wsuggest-override  -Idep/include -fPIC -I../../include -I../../dep/include -MMD -MP -g -O3 -march=nocona -funsafe-math-optimizations -Wall -Wextra -Wno-unused-parameter -DARCH_WIN -D_USE_MATH_DEFINES  -c -o build/src/Recorder.cpp.o src/Recorder.cpp
src/Recorder.cpp:11:10: fatal error: libavcodec/avcodec.h: No such file or directory
   11 | #include <libavcodec/avcodec.h>
      |          ^~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
make: *** [../../ build/src/Recorder.cpp.o] Fehler 1

Maybe i should be able to so the mistake here, but i don’t. Maybe someone of you can help?

Please make sure you build the submodules and dependencies according to the manual:

Also, why did you change the Makefile? I built the plugin myself yesterday from the latest commit without any problems.

I’m having a show-stopping issue with the ffmpeg compile not picking up the opus pkgconfig file. And I have followed every step exactly with a freshly cloned repo. Andrew is aware of the issue. I’m on Ubuntu 18.04, btw.

Sorry, I missed to say I’m on Windows. Can’t say anything on the other OS.

I totally misunderstood the make output. Did everything from scratch: sucess!