npm run build error on the Ubuntu 19.04

[LaMavia]

I've tried building the [example-flow-field](https://github.com/ekosz/reprocessing-example-flow-field example) and I got this error:

> reprocessing-example@ build /home/tomasz/Desktop/projects/cp-flow
> bsb -make-world

ninja: no work to do.
[1/1] Building run_build_script
FAILED: run_build_script 
/home/tomasz/Desktop/projects/cp-flow/node_modules/Tsdl/lib/bs/bytecode/build_script.exe /home/tomasz/Desktop/projects/cp-flow/node_modules/bs-platform/vendor /home/tomasz/Desktop/projects/cp-flow/node_modules/bs-platform/vendor/ocaml/lib/ocaml /home/tomasz/Desktop/projects/cp-flow/node_modules/Tsdl /home/tomasz/Desktop/projects/cp-flow
Fatal error: cannot load shared library dllunix
Reason: /home/tomasz/.opam/default/lib/ocaml/stublibs/dllunix.so: undefined symbol: caml_ba_element_size
ninja: error: rebuilding 'build.ninja': subcommand failed
Failure: /home/tomasz/Desktop/projects/cp-flow/node_modules/bs-platform/lib/ninja.exe 
 Location: /home/tomasz/Desktop/projects/cp-flow/node_modules/Tsdl/lib/bs/bytecode

I'd gone through other issues, such as #8 but I still couldn't solve it.

[Schmavery]

@bsansouci looks like that global ocaml issue again?
@LastShadowPL you said you went through #8, do you have a global ocaml/opam install?

[LaMavia]

To make sure I reinstalled both opam and ocaml.
First I installed the ocaml with sudo apt install ocaml, then I downloaded the opam's source code from https://github.com/ocaml/opam/releases and built it according to the guide

./configure --prefix=/home/tomasz/.opam
make lib-ext
make
sudo make install
opam init

I used sudo with the make install, because I ran into errors:

Creating directory /home/tomasz/.opam/doc/opam-core
[ERROR] Failure during install
./opam-installer: "mkdir" failed on /home/tomasz/.opam/doc/opam-core: Permission denied
make: *** [Makefile:133: installlib-core] Error 1
rm opam-core.install

Now when running the npm run build I get something like this:

> reprocessing-example@ build /home/tomasz/Desktop/projects/cp-flow
> bsb -make-world

ninja: no work to do.
[1/1] Building run_build_script
[1/1] Building run_build_script
[1/1] Building run_build_script
[1/1] Building run_build_script
Fatal error: exception Unix.Unix_error(Unix.EPERM, "utimes", "/home/tomasz/Desktop/projects/cp-flow/node_modules/Tgls/lib/ocaml/bytecode/tgls_new.cmi")

[LaMavia]

Now I followed this guide from http://ocaml.org/docs/install.html#OPAM :

# environment setup
opam init
eval `opam env`
# install given version of the compiler
opam switch create 4.06.1
eval `opam env`
# check you got what you want
which ocaml
ocaml -version

Here's the which ocaml output: /home/tomasz/.opam/4.06.1/bin/ocaml
And here's the the error:

> reprocessing-example@ build /home/tomasz/Desktop/projects/cp-flow
> bsb -make-world

ninja: no work to do.
[1/1] Building run_build_script
[1/1] Building run_build_script
[1/1] Building run_build_script
[1/1] Building run_build_script
[1/4] Building src/RGLInterface.mlast
FAILED: src/RGLInterface.mlast 
/home/tomasz/Desktop/projects/cp-flow/node_modules/bs-platform/lib/bsc.exe -pp "/home/tomasz/Desktop/projects/cp-flow/node_modules/bs-platform/lib/refmt3.exe --print binary"    -bs-super-errors -w -30-40+6+7+27+32..39+44+45+101-44 -bs-D BSB_BACKEND="bytecode" -nostdlib -I '/home/tomasz/Desktop/projects/cp-flow/node_modules/bs-platform/lib/ocaml' -no-alias-deps -color always -c -o src/RGLInterface.mlast -bs-syntax-only -bs-simple-binary-ast -bs-binary-ast -impl /home/tomasz/Desktop/projects/cp-flow/node_modules/Reasongl/src/RGLInterface.re
File "/home/tomasz/Desktop/projects/cp-flow/node_modules/Reasongl/src/RGLInterface.re", line 217, characters 6-7:
Error: 337: <UNKNOWN SYNTAX ERROR>

  We've found a bug for you!
  /home/tomasz/Desktop/projects/cp-flow/node_modules/Reasongl/src/RGLInterface.re
  
  There's been an error running Reason's refmt parser on a file.
  This was the command:
  
  /home/tomasz/Desktop/projects/cp-flow/node_modules/bs-platform/lib/refmt3.exe --print binary '/home/tomasz/Desktop/projects/cp-flow/node_modules/Reasongl/src/RGLInterface.re' > /tmp/ocamlpp534e7d
  
  Please file an issue on github.com/facebook/reason. Thanks!
  
ninja: error: rebuilding 'build.ninja': subcommand failed
Failure: /home/tomasz/Desktop/projects/cp-flow/node_modules/bs-platform/lib/ninja.exe 
 Location: /home/tomasz/Desktop/projects/cp-flow/node_modules/Reasongl/lib/bs/bytecode

[bsansouci]

Hey! Awesome that you got this far, I think turning off opam is the simplest way to get around this issue. That being said, the project you forked uses an older version of bsb-native. If you bump that to be “bsb-native”: “4.0.7000” and also make reprocessing be the latest version, it should build better.

[Schmavery]

Sorry about the misunderstanding! To be more clear, as ben said, the current release of bsb-native has a known issue where it sometimes doesn't work with a global opam install because of some env vars that opam shoves in your env that confuse the compiler :) (we actually found a fix last night and we're working on making a release)

[LaMavia]

Hi there. I'm sorry to bother you again, but I updated the bsb-native (global install) to the version 4.0.7000 and linked it in the cloned dir (npm link bsb-native). Now I'm getting this error when running npm run build:

> reprocessing-example@ build /home/tomasz/Desktop/projects/cp-flow
> bsb -make-world

[2/2] Building fake_src/sdl_index.mlast.d
[2/2] Building lib.cma
[4/4] Running build_script
Fatal error: cannot load shared library dllunix
Reason: /home/tomasz/.opam/4.06.1/lib/ocaml/stublibs/dllunix.so: undefined symbol: caml_ba_element_size
ninja: error: rebuilding 'build.ninja': subcommand failed
Failure: /home/tomasz/.npm/lib/node_modules/bsb-native/lib/ninja.exe 
 Location: /home/tomasz/Desktop/projects/cp-flow/node_modules/Tsdl/lib/bs/bytecode

[LaMavia]

I got rid of the last error by installing the flexdll lib. sudo apt install flexdll.
Thanks for the help :)

[bsansouci]

Wow ok, that's interesting! Could you print out the value of your env variable: CAML_LD_LIBRARY_PATH from where you were building the app?

I'm going to re-open because this is the issue that we're working on fixing, so you don't have to install anything else. I'm glad you were able to make it work though haha.

[LaMavia]

Sure thing, here you go /home/tomasz/.opam/4.06.1/lib/stublibs:/home/tomasz/.opam/4.06.1/lib/ocaml/stublibs:/home/tomasz/.opam/4.06.1/lib/ocaml