Use correct VST 3 directory name on PowerPC

Should be ppc[64][le]-linux, depending on word size and endianness.

Makefile.base.mk

@@ -688,7 +688,9 @@ endif
 # Set VST3 binary directory, see https://vst3sdk-doc.diatonic.jp/doc/vstinterfaces/vst3loc.html
 
 ifeq ($(LINUX),true)
-VST3_BINARY_DIR = Contents/$(TARGET_PROCESSOR)-linux
+# This must match `uname -m`, which differs from `gcc -dumpmachine` on PowerPC.
+VST3_ARCHITECTURE := $(patsubst powerpc%,ppc%,$(TARGET_PROCESSOR))
+VST3_BINARY_DIR = Contents/$(VST3_ARCHITECTURE)-linux
 else ifeq ($(MACOS),true)
 VST3_BINARY_DIR = Contents/MacOS
 else ifeq ($(WASM),true)

cmake/DPF-plugin.cmake

@@ -456,7 +456,7 @@ function(dpf__determine_vst3_package_architecture OUTPUT_VARIABLE)
     else()
       set(vst3_package_arch "i386")
     endif()
-  elseif(vst3_system_arch MATCHES "^(armv[3-8][a-z]*)$")
+  elseif(vst3_system_arch MATCHES "^(armv[3-8][a-z]*|ppc(64)?(le)?)$")
     set(vst3_package_arch "${vst3_system_arch}")
   elseif(vst3_system_arch MATCHES "^(aarch64)$")
     set(vst3_package_arch "aarch64")