Re: [capnproto] Fibers and compiling without exceptions

[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

On Fri, Nov 25, 2022, 9:11 AM Kenton Varda  wrote:

> 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
>
> On Mon, Oct 10, 2022 at 3:36 PM John Demme  wrote:
>
>> 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
>>
>> --
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>> 
>> .
>>
>

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Re: [capnproto] Fibers and compiling without exceptions

['Kenton Varda' via Cap'n Proto]

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

On Mon, Oct 10, 2022 at 3:36 PM John Demme  wrote:

> 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
>
> --
> You received this message because you are subscribed to the Google Groups
> "Cap'n Proto" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to capnproto+unsubscr...@googlegroups.com.
> To view this discussion on the web visit
> https://groups.google.com/d/msgid/capnproto/34f283a1-8bf7-4fd8-946f-cbabf4d82bb9n%40googlegroups.com
> 
> .
>

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