fix: Build the emscripten bindings with EXPORT_ES6=1 (#106)

Author: robertoraggi

.devcontainer/emscripten_dev/Dockerfile

@@ -1,6 +1,7 @@
 FROM emscripten/emsdk:3.1.42
 
 RUN apt-get update && apt-get install -y \
+    bash-completion \
     ninja-build \
     wget \
     unzip

.devcontainer/emscripten_dev/devcontainer.json

@@ -19,6 +19,7 @@
         "cmake.configureArgs": [
           "-DCMAKE_TOOLCHAIN_FILE=/emsdk/upstream/emscripten/cmake/Modules/Platform/Emscripten.cmake",
           "-DFLATBUFFERS_FLATC_EXECUTABLE=/usr/bin/flatc",
+          "-DCMAKE_BUILD_TYPE=MinSizeRel",
           "-DKWGEN_EXECUTABLE=/usr/bin/kwgen"
         ],
         "cmake.buildDirectory": "${workspaceFolder}/build.em",

.github/workflows/ci.yml

@@ -75,7 +75,9 @@ jobs:
       - name: Test
         working-directory: packages/cxx-frontend/examples
         run: |
-          node dump.mjs
+          for i in *.mjs; do
+            node dump.mjs
+          done
 
       - name: Upload artifacts
         uses: actions/upload-artifact@v3

packages/cxx-frontend/package.json

@@ -17,7 +17,9 @@
   "keywords": [
     "c++",
     "compiler",
+    "lexer",
     "parser",
+    "preprocessor",
     "syntax"
   ],
   "author": {

scripts/build-emscripten.sh

@@ -8,13 +8,15 @@ project_root=$(cd "$me/.." && pwd)
 
 CMAKE_CONFIGURE_OPTIONS="
 -DCMAKE_INSTALL_PREFIX=build.em/install/usr \
--DCMAKE_BUILD_TYPE=MinSizeRel \
--DCMAKE_INTERPROCEDURAL_OPTIMIZATION=1 \
--DKWGEN_EXECUTABLE=/usr/bin/kwgen \
--DFLATBUFFERS_FLATC_EXECUTABLE=/usr/bin/flatc"
+-DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE:-MinSizeRel} \
+-DCMAKE_INTERPROCEDURAL_OPTIMIZATION=${CMAKE_INTERPROCEDURAL_OPTIMIZATION:-1} \
+-DKWGEN_EXECUTABLE=${KWGEN_EXECUTABLE:-/usr/bin/kwgen} \
+-DFLATBUFFERS_FLATC_EXECUTABLE=${FLATBUFFERS_FLATC_EXECUTABLE:-/usr/bin/flatc}"
 
 if [ ! -z "${CODESPACES}" ] && [ ! -z "${EMSDK}" ]; then
-    cmake -G Ninja ${CMAKE_CONFIGURE_OPTIONS} -S ${project_root} -B ${project_root}/build.em
+    if [ ! -d "${project_root}/build.em" ]; then
+        cmake -G Ninja ${CMAKE_CONFIGURE_OPTIONS} -S ${project_root} -B ${project_root}/build.em
+    fi
     cmake --build $project_root/build.em
     exit 0
 fi

src/js/CMakeLists.txt

@@ -30,13 +30,13 @@ target_link_libraries(cxx-js cxx-parser)
 target_link_options(cxx-js PUBLIC
     "SHELL:--bind"
     "SHELL:-s ENVIRONMENT=web"
+    "SHELL:-s EXPORT_ES6=1"
     "SHELL:-s WASM_ASYNC_COMPILATION=1"
     "SHELL:-s MODULARIZE=1"
     "SHELL:-s MALLOC=emmalloc"
     "SHELL:-s ALLOW_MEMORY_GROWTH=1"
     "SHELL:-s FILESYSTEM=0"
     "SHELL:-s NO_DYNAMIC_EXECUTION=1"
     "SHELL:-s WASM_BIGINT=1"
-    "SHELL:--extern-post-js ${CMAKE_CURRENT_SOURCE_DIR}/cxx/suffix.js"
 )