Please remove front-matter.js?

[regnaio]

I'm unsure why there is the file front-matter.js? It is breaking the build process

I'm on Windows 10 with emsdk install 1.39.0. The last few lines of output from running cmake --build builds are:

shared : error : C:/dev/ammo.js/front-matter.js: Input file has an unknown suffix, don't know what to do with it! [C:\dev\ammo.js\builds\ammo-javascript.vcxproj]
C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Microsoft\VC\v160\Microsoft.CppCommon.targets(238,5): error MSB8066: Custom build for 'C:\dev\amm
o.js\builds\CMakeFiles\f8eaa61671472485174d6f054ffab191\ammo.js.rule;C:\dev\ammo.js\builds\CMakeFiles\e6bbd10bfef2029d5b5b22613118c551\ammo-javascript.rule' exited wit
h code 1. [C:\dev\ammo.js\builds\ammo-javascript.vcxproj]
  Building ammo webassembly
shared : error : C:/dev/ammo.js/front-matter.js: Input file has an unknown suffix, don't know what to do with it! [C:\dev\ammo.js\builds\ammo-wasm.vcxproj]
C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Microsoft\VC\v160\Microsoft.CppCommon.targets(238,5): error MSB8066: Custom build for 'C:\dev\amm
o.js\builds\CMakeFiles\f8eaa61671472485174d6f054ffab191\ammo.wasm.js.rule;C:\dev\ammo.js\builds\CMakeFiles\e6bbd10bfef2029d5b5b22613118c551\ammo-wasm.rule' exited with
 code 1. [C:\dev\ammo.js\builds\ammo-wasm.vcxproj]

Removing front-matter.js and deleting set(AMMO_FRONT_MATTER_FILE ${CMAKE_CURRENT_SOURCE_DIR}/front-matter.js) from CMakeLists.txt allows me to get further into the build process, but it still fails due to:

wasm-ld : error : glue.o: undefined symbol: gContactAddedCallback [C:\dev\ammo.js\builds\ammo-javascript.vcxproj]
wasm-ld : error : glue.o: undefined symbol: gContactProcessedCallback [C:\dev\ammo.js\builds\ammo-javascript.vcxproj]
wasm-ld : error : glue.o: undefined symbol: gContactDestroyedCallback [C:\dev\ammo.js\builds\ammo-javascript.vcxproj]
wasm-ld : error : glue.o: undefined symbol: vtable for btSphereShape [C:\dev\ammo.js\builds\ammo-javascript.vcxproj]
wasm-ld : error : glue.o: undefined symbol: vtable for btDefaultVehicleRaycaster [C:\dev\ammo.js\builds\ammo-javascript.vcxproj]
shared : error : 'C:/dev/emsdk/upstream/bin\wasm-ld.exe -o C:\Users\georg\AppData\Local\Temp\emscripten_temp_j6cgw2ha\ammo.wasm --allow-undefined --lto-O3 glue.o C:/de
v/ammo.js/builds/bullet/src/BulletCollision/Debug/libBulletCollision.a C:/dev/ammo.js/builds/bullet/src/BulletDynamics/Debug/libBulletDynamics.a C:/dev/ammo.js/builds/
bullet/src/BulletSoftBody/Debug/libBulletSoftBody.a -LC:\dev\emsdk\upstream\emscripten\system\local\lib C:/dev/ammo.js/builds/bullet/src/LinearMath/Debug/libLinearMath
.a -LC:\dev\emsdk\upstream\emscripten\system\lib -LC:\dev\emsdk\upstream\emscripten\cache\wasm-obj C:\dev\emsdk\upstream\emscripten\cache\wasm-obj\libc.a C:\dev\emsdk\
upstream\emscripten\cache\wasm-obj\libcompiler_rt.a C:\dev\emsdk\upstream\emscripten\cache\wasm-obj\libc-wasm.a C:\dev\emsdk\upstream\emscripten\cache\wasm-obj\libc++-
noexcept.a C:\dev\emsdk\upstream\emscripten\cache\wasm-obj\libc++abi-noexcept.a C:\dev\emsdk\upstream\emscripten\cache\wasm-obj\libdlmalloc.a C:\dev\emsdk\upstream\ems
cripten\cache\wasm-obj\libpthread_stub.a C:\dev\emsdk\upstream\emscripten\cache\wasm-obj\libc_rt_wasm.a --import-memory --import-table -mllvm -combiner-global-alias-an
alysis=false -mllvm -enable-emscripten-sjlj -mllvm -disable-lsr --export __wasm_call_ctors --export __data_end --export malloc --export free --export setThrew --export
 _ZSt18uncaught_exceptionv -z stack-size=5242880 --initial-memory=268435456 --no-entry --max-memory=268435456 --global-base=1024' failed (1) [C:\dev\ammo.js\builds\amm
o-javascript.vcxproj]
C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Microsoft\VC\v160\Microsoft.CppCommon.targets(238,5): error MSB8066: Custom build for 'C:\dev\amm
o.js\builds\CMakeFiles\f8eaa61671472485174d6f054ffab191\ammo.js.rule;C:\dev\ammo.js\builds\CMakeFiles\e6bbd10bfef2029d5b5b22613118c551\ammo-javascript.rule' exited wit
h code 1. [C:\dev\ammo.js\builds\ammo-javascript.vcxproj]

[ianpurvis]

Hi, I think your issue is that you are building with Visual Studio which has not been supported. Have you tried to build ammo with mingw? There is a link in the readme where you can download it-

On windows, you can build using cmake's mingw generator:

cmake -B builds -G 'MinGW Makefiles'
cmake --build builds

[regnaio]

Thank you so much for your help, @ianpurvis

Building on Windows was too difficult for me, so I tried Docker image (https://hub.docker.com/r/emscripten/emsdk), which worked smoothly

I forked Ammo.js and added two lines to .idl to resolve #350

Also, I added a new Dockerfile that should easily build Ammo on any system: https://github.com/regnaio/ammo.js/blob/master/Dockerfile

FROM emscripten/emsdk

WORKDIR /src

COPY . .

RUN cmake -B builds -DCLOSURE=1 -DTOTAL_MEMORY=268435456

RUN cmake --build builds

# Build image by running: docker build -t ammo .

# Run container by running: docker run -t ammo:latest

# Retrieve build files by running: docker cp <container-id>:/src/builds <host-path>