Fix bug in resolving paths in system::unarchiveFolder().

Create .tar.zst plugins in `make dist` for plugins.
Link to libstdc++ statically for plugins.
Remove -lstdc++fs since we replaced it with ghc::filesystem.

Makefile

@@ -33,7 +33,7 @@ build/dep/osdialog/osdialog_gtk3.c.o: FLAGS += $(shell pkg-config --cflags gtk+-
 	FLAGS += -fno-gnu-unique
 
 	LDFLAGS += -Wl,--whole-archive
-	LDFLAGS += dep/lib/libGLEW.a dep/lib/libglfw3.a dep/lib/libjansson.a dep/lib/libcurl.a dep/lib/libssl.a dep/lib/libcrypto.a dep/lib/libarchive.a dep/lib/libzstd.a dep/lib/libspeexdsp.a dep/lib/libsamplerate.a dep/lib/librtmidi.a dep/lib/librtaudio.a -lstdc++fs
+	LDFLAGS += dep/lib/libGLEW.a dep/lib/libglfw3.a dep/lib/libjansson.a dep/lib/libcurl.a dep/lib/libssl.a dep/lib/libcrypto.a dep/lib/libarchive.a dep/lib/libzstd.a dep/lib/libspeexdsp.a dep/lib/libsamplerate.a dep/lib/librtmidi.a dep/lib/librtaudio.a
 	LDFLAGS += -Wl,--no-whole-archive
 	LDFLAGS += -lpthread -lGL -ldl -lX11 -lasound -ljack
 	LDFLAGS += $(shell pkg-config --libs gtk+-3.0)
@@ -65,7 +65,7 @@ ifdef ARCH_WIN
 	LDFLAGS += -Wl,--export-all-symbols
 	LDFLAGS += -Wl,--out-implib,$(TARGET).a
 	LDFLAGS += -Wl,-Bstatic -Wl,--whole-archive
-	LDFLAGS += dep/lib/libglew32.a dep/lib/libglfw3.a dep/lib/libjansson.a dep/lib/libspeexdsp.a dep/lib/libsamplerate.a dep/lib/libarchive.a dep/lib/libzstd.a dep/lib/libcurl.a dep/lib/libssl.a dep/lib/libcrypto.a dep/lib/librtaudio.a dep/lib/librtmidi.a -lstdc++fs
+	LDFLAGS += dep/lib/libglew32.a dep/lib/libglfw3.a dep/lib/libjansson.a dep/lib/libspeexdsp.a dep/lib/libsamplerate.a dep/lib/libarchive.a dep/lib/libzstd.a dep/lib/libcurl.a dep/lib/libssl.a dep/lib/libcrypto.a dep/lib/librtaudio.a dep/lib/librtmidi.a
 	LDFLAGS += -Wl,-Bdynamic -Wl,--no-whole-archive
 	LDFLAGS += -lpthread -lopengl32 -lgdi32 -lws2_32 -lcomdlg32 -lole32 -ldsound -lwinmm -lksuser -lshlwapi -lmfplat -lmfuuid -lwmcodecdspuuid -ldbghelp
 

plugin.mk

@@ -20,6 +20,9 @@ FLAGS += -I$(RACK_DIR)/include -I$(RACK_DIR)/dep/include
 LDFLAGS += -shared
 LDFLAGS += -L$(RACK_DIR) -lRack
 
+# Since the compiler we're using could have a newer version than the minimum supported libstdc++ version, link it statically.
+LDFLAGS += -static-libstdc++
+
 include $(RACK_DIR)/arch.mk
 
 ifdef ARCH_LIN
@@ -71,10 +74,10 @@ else
 	cp -r --parents $(DISTRIBUTABLES) dist/"$(SLUG)"/
 endif
 	@# Create ZIP package
-	cd dist && zip -q -9 -r "$(SLUG)"-"$(VERSION)"-$(ARCH).zip "$(SLUG)"
+	cd dist && ZSTD_CLEVEL=19 tar -cf "$(SLUG)"-"$(VERSION)"-$(ARCH).vcvplugin --zstd "$(SLUG)"
 
 install: dist
-	cp dist/"$(SLUG)"-"$(VERSION)"-$(ARCH).zip $(RACK_USER_DIR)/plugins-v2/
+	cp dist/"$(SLUG)"-"$(VERSION)"-$(ARCH).vcvplugin $(RACK_USER_DIR)/plugins-v2/
 
 .PHONY: clean dist
 .DEFAULT_GOAL := all

src/system.cpp

@@ -415,7 +415,7 @@ void unarchiveToFolder(const std::string& archivePath, const std::string& folder
 		std::string entryPath = archive_entry_pathname(entry);
 		if (!fs::u8path(entryPath).is_relative())
 			throw Exception(string::f("Unarchiver does not support absolute tar paths: %s", entryPath.c_str()));
-		entryPath = fs::relative(fs::u8path(entryPath), fs::u8path(folderPath)).generic_u8string();
+		entryPath = (fs::u8path(folderPath) / fs::u8path(entryPath)).generic_u8string();
 #if defined ARCH_WIN
 		archive_entry_copy_pathname_w(entry, string::U8toU16(entryPath).c_str());
 #else