Enable LTO, reduce asset count

Enable -flto, -sEVAL_CTORS=1, reduce output file size by doing link-time optimizations and pre-evaluating code.
--memory-init-file=0 allows for lesser split output files.

Disable AUTO_NATIVE_LIBRARIES

Use --embed-file instead of --preload-file

Author: WeebDataHoarder

Makefile

@@ -4,8 +4,8 @@
 BASE_DIR:=$(dir $(realpath $(firstword $(MAKEFILE_LIST))))
 DIST_DIR:=$(BASE_DIR)dist/libraries
 
-export LDFLAGS = -O3 -s ENVIRONMENT=web,webview,worker -s NO_EXIT_RUNTIME=1
-export CFLAGS = -O3 -s USE_PTHREADS=0
+export LDFLAGS = -O3 -s EVAL_CTORS=1 -flto -s ENVIRONMENT=web,webview,worker -s NO_EXIT_RUNTIME=1
+export CFLAGS = -O3 -flto -s USE_PTHREADS=0
 export CXXFLAGS = $(CFLAGS)
 export PKG_CONFIG_PATH = $(DIST_DIR)/lib/pkgconfig
 export EM_PKG_CONFIG_PATH = $(PKG_CONFIG_PATH)
@@ -155,12 +155,14 @@ all-src:
 EMCC_COMMON_ARGS = \
 	$(LDFLAGS) \
 	-s EXPORTED_FUNCTIONS="['_main', '_malloc']" \
+	-s DEFAULT_LIBRARY_FUNCS_TO_INCLUDE="['\$$Browser']" \
 	-s EXPORTED_RUNTIME_METHODS="['ccall', 'cwrap', 'getValue', 'FS_createPreloadedFile', 'FS_createPath']" \
-	--use-preload-plugins \
-	--preload-file assets/default.woff2 \
-	--preload-file assets/fonts.conf \
+	--embed-file assets/default.woff2 \
+	--embed-file assets/fonts.conf \
+	-s AUTO_NATIVE_LIBRARIES=0 \
 	-s ALLOW_MEMORY_GROWTH=1 \
 	-s NO_FILESYSTEM=0 \
+	--memory-init-file=0 \
 	--no-heap-copy \
 	-o $@