[swift-corelibs-dev] libdispatch module on Linux

[Daniel Eggert]

I filed https://bugs.swift.org/browse/SR-577 “Compiler should pass -Xcc -fblocks when processing .h files”

/Daniel



> On 18 Jan 2016, at 19:06, Philippe Hausler <phausler at apple.com> wrote:
> 
> I am not certain on `swift build` but for swift and swiftc it is `-Xcc -fblocks`.
> 
> My rule of thumb is that if any time there is something that does not meet initial expectations filing a bug is always appreciated (even if it is marked as a dup/not-to-be-fixed/etc)
> 
>> On Jan 18, 2016, at 10:03 AM, Daniel Eggert <danieleggert at me.com> wrote:
>> 
>> How would I go about passing ‘-fblocks’ when building a module using ‘swift build’?
>> 
>> Should I file a bug to track this?
>> 
>> /Daniel
>> 
>> 
>>> On 18 Jan 2016, at 18:00, Pierre Habouzit <phabouzit at apple.com> wrote:
>>> 
>>> this is very likely as __BLOCKS__ is only defined when you pass -fblocks.
>>> 
>>> though, I’m told the blocks layout from swift and the one from libblocks-runtime-dev is not the same so it will likely crash (because dispatch as I said in another thread, uses that layout to get to the function pointer stored there). but worth trying.
>>> 
>>> -Pierre
>>> 
>>>> On Jan 18, 2016, at 8:58 AM, Philippe Hausler via swift-corelibs-dev <swift-corelibs-dev at swift.org> wrote:
>>>> 
>>>> I noticed with importing CoreFoundation into swift-corelibs-foundation that we needed to pass  -Xcc -fblocks to switfc to make it import a few things correctly on linux. I wonder if that is the same thing that is happening here too.
>>>> 
>>>>> On Jan 18, 2016, at 8:31 AM, Daniel Eggert via swift-corelibs-dev <swift-corelibs-dev at swift.org> wrote:
>>>>> 
>>>>> I’ve create a system module for libdispatch, but when I import it, I don’t see anything guarded by __BLOCKS__.
>>>>> 
>>>>> Is there something I need to do when defining the system module to make that work?
>>>>> 
>>>>> Or something when I use it?
>>>>> 
>>>>> /Daniel
>>>>> 
>>>>> 
>>>>> % cat Package.swift 
>>>>> import PackageDescription
>>>>> let package = Package(name: "CDispatch”)
>>>>> 
>>>>> 
>>>>> % cat module.modulemap 
>>>>> module CDispatch [system] {
>>>>> umbrella header "/usr/local/include/dispatch/dispatch.h"
>>>>> link "dispatch"
>>>>> export *
>>>>> }
>>>>> 
>>>>> 
>>>>> % uname -a
>>>>> Linux ubuntu 4.2.0-16-generic #19-Ubuntu SMP Thu Oct 8 15:35:06 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
>>>>> 
>>>>> 
>>>>> 
>>>>> % swift -I path/to/CDispatch-1.0.2
>>>>> Welcome to Swift version 2.2-dev (LLVM 3ebdbb2c7e, Clang f66c5bb67b, Swift 1f2908b4f7). Type :help for assistance.
>>>>> 1> import CDispatch
>>>>> 2> dispatch_group_
>>>>> Available completions:
>>>>> 	dispatch_group_async_f(group: dispatch_group_t, queue: dispatch_queue_t, context: UnsafeMutablePointer<Void>, work: dispatch_function_t(UnsafeMutablePointer<Void>) -> Void) -> Void
>>>>> 	dispatch_group_create() -> dispatch_group_t
>>>>> 	dispatch_group_enter(group: dispatch_group_t) -> Void
>>>>> 	dispatch_group_leave(group: dispatch_group_t) -> Void
>>>>> 	dispatch_group_notify_f(group: dispatch_group_t, queue: dispatch_queue_t, context: UnsafeMutablePointer<Void>, work: dispatch_function_t(UnsafeMutablePointer<Void>) -> Void) -> Void
>>>>> 	dispatch_group_t
>>>>> 	dispatch_group_wait(group: dispatch_group_t, timeout: dispatch_time_t) -> Int
>>>>> 
>>>>> _______________________________________________
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>>>> 
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>> 
>