From ea18b1a1ad6712a8071bd536da925e8a489dcefb Mon Sep 17 00:00:00 2001
From: falkTX <falktx@falktx.com>
Date: Mon, 4 Jul 2022 14:18:28 +0100
Subject: [PATCH] Get all plugins to build for wasm

Signed-off-by: falkTX <falktx@falktx.com>
---
 Makefile.base.mk                     | 12 +++++++++---
 Makefile.plugins.mk                  |  4 ++--
 distrho/src/DistrhoPluginVST2.cpp    |  2 +-
 distrho/src/jackbridge/SDLBridge.hpp |  2 ++
 4 files changed, 14 insertions(+), 6 deletions(-)

diff --git a/Makefile.base.mk b/Makefile.base.mk
index 14c55d32..3156686e 100644
--- a/Makefile.base.mk
+++ b/Makefile.base.mk
@@ -175,20 +175,24 @@ endif
 endif
 
 ifeq ($(MACOS),true)
+
 # MacOS linker flags
 LINK_OPTS  = -fdata-sections -ffunction-sections -Wl,-dead_strip,-dead_strip_dylibs
 ifneq ($(SKIP_STRIPPING),true)
 LINK_OPTS += -Wl,-x
 endif
+
 else
+
 # Common linker flags
 LINK_OPTS  = -fdata-sections -ffunction-sections -Wl,-O1,--gc-sections
+ifneq ($(WASM),true)
+LINK_OPTS += -Wl,--as-needed
 ifneq ($(SKIP_STRIPPING),true)
 LINK_OPTS += -Wl,--strip-all
 endif
-ifneq ($(WASM),true)
-LINK_OPTS += -Wl,--as-needed
 endif
+
 endif
 
 ifeq ($(SKIP_STRIPPING),true)
@@ -535,6 +539,8 @@ endif
 
 ifeq ($(MACOS),true)
 LIB_EXT = .dylib
+else ifeq ($(WASM),true)
+LIB_EXT = .wasm
 else ifeq ($(WINDOWS),true)
 LIB_EXT = .dll
 else
@@ -547,7 +553,7 @@ endif
 ifeq ($(MACOS),true)
 SHARED = -dynamiclib
 else ifeq ($(WASM),true)
-SHARED = -sSIDE_MODULE=1
+SHARED = -sSIDE_MODULE=2
 else
 SHARED = -shared
 endif
diff --git a/Makefile.plugins.mk b/Makefile.plugins.mk
index 619b44bc..59f91dd5 100644
--- a/Makefile.plugins.mk
+++ b/Makefile.plugins.mk
@@ -170,9 +170,9 @@ SYMBOLS_SHARED = -Wl,-exported_symbols_list,$(DPF_PATH)/utils/symbols/shared.exp
 else ifeq ($(WASM),true)
 SYMBOLS_LADSPA = -sEXPORTED_FUNCTIONS="['ladspa_descriptor']"
 SYMBOLS_DSSI   = -sEXPORTED_FUNCTIONS="['ladspa_descriptor','dssi_descriptor']"
-SYMBOLS_LV2DSP = -sEXPORTED_FUNCTIONS="['lv2_descriptor']"
+SYMBOLS_LV2DSP = -sEXPORTED_FUNCTIONS="['lv2_descriptor','lv2_generate_ttl']"
 SYMBOLS_LV2UI  = -sEXPORTED_FUNCTIONS="['lv2ui_descriptor']"
-SYMBOLS_LV2    = -sEXPORTED_FUNCTIONS="['lv2_descriptor','lv2ui_descriptor']"
+SYMBOLS_LV2    = -sEXPORTED_FUNCTIONS="['lv2_descriptor','lv2_generate_ttl','lv2ui_descriptor']"
 SYMBOLS_VST2   = -sEXPORTED_FUNCTIONS="['VSTPluginMain']"
 SYMBOLS_VST3   = -sEXPORTED_FUNCTIONS="['GetPluginFactory','ModuleEntry','ModuleExit']"
 SYMBOLS_SHARED = -sEXPORTED_FUNCTIONS="['createSharedPlugin']"
diff --git a/distrho/src/DistrhoPluginVST2.cpp b/distrho/src/DistrhoPluginVST2.cpp
index 56a3e116..b158629d 100644
--- a/distrho/src/DistrhoPluginVST2.cpp
+++ b/distrho/src/DistrhoPluginVST2.cpp
@@ -1665,7 +1665,7 @@ static struct Cleanup {
 END_NAMESPACE_DISTRHO
 
 DISTRHO_PLUGIN_EXPORT
-#if DISTRHO_OS_WINDOWS || DISTRHO_OS_MAC
+#if DISTRHO_OS_MAC || DISTRHO_OS_WASM || DISTRHO_OS_WINDOWS
 const AEffect* VSTPluginMain(audioMasterCallback audioMaster);
 #else
 const AEffect* VSTPluginMain(audioMasterCallback audioMaster) asm ("main");
diff --git a/distrho/src/jackbridge/SDLBridge.hpp b/distrho/src/jackbridge/SDLBridge.hpp
index 149963ca..2c5138ac 100644
--- a/distrho/src/jackbridge/SDLBridge.hpp
+++ b/distrho/src/jackbridge/SDLBridge.hpp
@@ -204,11 +204,13 @@ struct SDLBridge {
 
         self->jackProcessCallback(numFrames, self->jackProcessArg);
 
+#if DISTRHO_PLUGIN_NUM_OUTPUTS > 0
         for (uint i=0; i < DISTRHO_PLUGIN_NUM_OUTPUTS; ++i)
         {
             for (uint j=0; j < numFrames; ++j)
                 fstream[j * DISTRHO_PLUGIN_NUM_OUTPUTS + i] = self->audioBuffers[DISTRHO_PLUGIN_NUM_INPUTS+i][j];
         }
+#endif
     }
 
 };