From e18eee6532f5dc4b0f7ee99024e24bf4c8e12fc2 Mon Sep 17 00:00:00 2001
From: Frank Denis <github@pureftpd.org>
Date: Wed, 11 Feb 2026 12:00:10 +0100
Subject: [PATCH] emscripten: build native ESM module

---
 dist-build/emscripten.sh | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/dist-build/emscripten.sh b/dist-build/emscripten.sh
index 10d2ddf1..9ee7e6fc 100755
--- a/dist-build/emscripten.sh
+++ b/dist-build/emscripten.sh
@@ -240,9 +240,14 @@ ENDJS
 
   rm "${PREFIX}/lib/libsodium.pre.tmp.js" "${PREFIX}/lib/libsodium.mid.tmp.js" "${PREFIX}/lib/libsodium.end.tmp.js"
 
-  #KEEP rm "${PREFIX}/lib/libsodium.asm.tmp.js" "${PREFIX}/lib/libsodium.wasm.tmp.js"
+  # Build native ESM module (WASM-only, factory pattern, no asm.js fallback)
+  emccLibsodium "${PREFIX}/lib/libsodium.esm.mjs" -O3 ${SIMD_CFLAGS} \
+    -s WASM=1 -s EVAL_CTORS=2 -s INITIAL_MEMORY=${WASM_INITIAL_MEMORY} \
+    -s MODULARIZE=1 -s EXPORT_ES6=1 -s EXPORT_NAME=createLibsodium \
+    -s ENVIRONMENT=web,worker
+
   touch -r "${PREFIX}/lib/libsodium.js" "$DONE_FILE"
-  ls -l "${PREFIX}/lib/libsodium.js"
+  ls -l "${PREFIX}/lib/libsodium.js" "${PREFIX}/lib/libsodium.esm.mjs"
   exit 0
 fi