[swift-corelibs-dev] libdispatch module on Linux

[Pierre Habouzit]

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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