--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/platform/wasm/tools/build.sh	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,82 @@
+#!/bin/bash
+#
+# Script to build the WASM binary.
+#
+# The following environment variables can be used to configure the build:
+#   EMSDK, BUILD, SUFFIX, DEFINES, FEATURES
+#
+# EMSDK must point to the directory where emsdk is installed
+# BUILD should be "small" or "memento"
+# DEFINES should be a set of -D defines (e.g. "-DTOFU")
+# FEATURES should be a list of "feature=no" (e.g. "brotli=no mujs=no extract=no xps=no svg=no html=no")
+# SUFFIX should be a tag to keep build files for different configurations separate
+#
+
+EMSDK=${EMSDK:-/opt/emsdk}
+BUILD=${BUILD:-small}
+DEFINES=${DEFINES:--DTOFU -DTOFU_CJK_EXT}
+FEATURES=${FEATURES:-brotli=no mujs=no extract=no xps=no svg=no}
+
+if [ "$BUILD" = "memento" ]
+then
+	MEMENTO="-DMEMENTO -DMEMENTO_STACKTRACE_METHOD=0"
+fi
+
+export EMSDK_QUIET=1
+source $EMSDK/emsdk_env.sh
+
+emsdk install 4.0.8 >/dev/null || exit
+emsdk activate 4.0.8 >/dev/null || exit
+
+mkdir -p dist
+rm -f dist/*
+
+echo "COMPILING ($BUILD)"
+
+make --no-print-directory -j $(nproc) \
+	-C ../.. \
+	build=$BUILD \
+	build_suffix=$SUFFIX \
+	OS=wasm \
+	XCFLAGS="$MEMENTO $DEFINES" \
+	$FEATURES \
+	libs
+
+echo "LINKING"
+
+emcc -o dist/mupdf-wasm.js \
+	-I ../../include \
+	-Os -g2 \
+	$MEMENTO \
+	--no-entry \
+	-mno-nontrapping-fptoint \
+	-fwasm-exceptions \
+	-sSUPPORT_LONGJMP=wasm \
+	-sMODULARIZE=1 \
+	-sEXPORT_ES6=1 \
+	-sEXPORT_NAME='"libmupdf_wasm"' \
+	-sALLOW_MEMORY_GROWTH=1 \
+	-sTEXTDECODER=2 \
+	-sFILESYSTEM=0 \
+	-sEXPORTED_RUNTIME_METHODS='["UTF8ToString","lengthBytesUTF8","stringToUTF8","HEAPU8","HEAP32","HEAPU32","HEAPF32"]' \
+	lib/mupdf.c \
+	 ../../build/wasm/$BUILD$SUFFIX/libmupdf.a \
+	 ../../build/wasm/$BUILD$SUFFIX/libmupdf-third.a
+
+# remove executable bit from wasm-ld output
+chmod -x dist/mupdf-wasm.wasm
+
+echo "TYPESCRIPT"
+
+sed < lib/mupdf.c '/#include/d' | emcc -E - | node tools/make-wasm-type.js > lib/mupdf-wasm.d.ts
+cp lib/mupdf-wasm.d.ts dist/mupdf-wasm.d.ts
+
+npx tsc -p .
+
+# convert spaces to tabs
+sed -i -e 's/    /\t/g' dist/mupdf.js
+
+echo "TERSER"
+
+npx terser --module -c -m -o dist/mupdf-wasm.js dist/mupdf-wasm.js
+# npx terser --module -c -m -o dist/mupdf.min.js dist/mupdf.js