Fibers and compiling without exceptions

[John Demme]

Hi All-

I have a code base which doesn't have exceptions enabled (it's an LLVM code base wherein policy prevents compiling with exceptions). I'd like to use the Cap'n Proto (C++) RPC server but cannot use fibers without exceptions. I know it's possible to compile Cap'n Proto without fibers but I'd rather not require a custom compile for my fellow devs -- I'd rather let them use their system install of capnp. Is this possible?

~John

[Kenton Varda]

Hi John,

Sorry for the very slow response, I've been on leave.

Fibers won't be used unless you explicitly ask for them.

However, regardless of fibers, you cannot use a version of Cap'n Proto compiled with exceptions enabled inside of an application compiled with exceptions disabled. Compiling with -fno-exceptions is essentially an ABI-breaking switch for libcapnp and libkj; you must apply the same flag when building the library itself and the app that uses it.

So, unfortunately, it sounds like you cannot use the system-installed capnp, which is typically built with exceptions enabled.

-Kenton

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[John Demme]

Hi Kenton-

No worries about the delay. And yeah, that's what I figured. Just wanted to check the I wasn't missing anything.

Thanks!

~John