Problems encountered when building cheerp

[unicornt]

I try to build cheerp according to build-instructions. However, I meet some problems.

Problem 1

In "Build utilities and libraries" section. When running instruction "ninja -C build_runtimes_genericjs", it will report no member error. I fix it by removing this code.

Problem 2

In "Build utilities and libraries" section. When running instruction "make -C stdlibs install INSTALL_PREFIX=/opt/cheerp CHEERP_PREFIX=/opt/cheerp". It will report no rule error. I fix it by removing "crt1.bc" from Makefile.

Problem 3

After building successfully, when trying to compile C++ file, it will report no file error.

I have fixed all of them and built cheerp successfully, but i am not sure if i do it right and why these problem would arise. These problems is because of bad environment configuration, or failure in these instructions?

[carlopi]

Hi @unicornt, thanks for trying Cheerp, and reporting back the problems you were faced with.

Problem 1: I think I have a fix, will check and come back to it in a bit.

Problem 2: The file crt1.bc should be genertated during cheerp-musl build step, and then found both at /opt/cheerp/lib/genericjs/crt1.bc and at /opt/cheerp/lib/asmjs/crt1.bc Could you possibly check whether this was the case?

Problem 3: I still have to check, unsure what's happening, the file libsystem.bc should also be listed in /opt/cheerp/bin/../lib/asmjs/libsystem.bc.

[unicornt]

Hi @unicornt, thanks for trying Cheerp, and reporting back the problems you were faced with.

Problem 1: I think I have a fix, will check and come back to it in a bit.

Problem 2: The file crt1.bc should be genertated during cheerp-musl build step, and then found both at /opt/cheerp/lib/genericjs/crt1.bc and at /opt/cheerp/lib/asmjs/crt1.bc Could you possibly check whether this was the case?

Problem 3: I still have to check, unsure what's happening, the file libsystem.bc should also be listed in /opt/cheerp/bin/../lib/asmjs/libsystem.bc.

In Problem 2, do you mean cheerp-musl? I didn't see it in Installation instructions.

[carlopi]

Yes, we recently moved from newlib to musl as the backing libc implementation.

Thanks for pointing out that the documentation is outdated, I will fix it now, this probably generates all 3 problems.

I will ping when the documentation is up to date.

By the way, probably the simplest way to get started with Cheerp development is using PPAs, also available for nightly builds.

[carlopi]

I believe all 3 problem are connected to the switch to musl.

I changed the build instructions to point to the latest stable release, Cheerp 2.7, that still uses cheerp-newlib: https://docs.leaningtech.com/cheerp/Linux-build-instructions.

Thanks you again for noticing, looking forward for other feedback you might have on Cheerp.