[swift-users] statically link the standard library on Linux

[Drew Crawford]

I traced this down to the sourcecode after I posted here: https://bugs.swift.org/browse/SR-730 <https://bugs.swift.org/browse/SR-730>

tll;dr the standard library is forcibly dynamically-linked on Linux, and we need a way to opt out of that from the swift frontend.  I have not gone further with that since A) my C++-foo is not very excellent and B) core hasn't blessed any particular solution I proffered in that thread.  If you can make progress there I would be grateful.

Then it is just a matter of getting the flags right; in practice, OSX wants -L path/to/swift_static -lc++ -framework Foundation -Xlinker -force_load_swift_libs, whereas Linux wants (I believe) -licuuc -licu18n -lbsd /path/to/swift_static/a.a /path/to/swift_static/b.a /path/to/swift_static/c.a ...  There may be an equivalent to force_load_swift_libs that knows what libs to load, but I haven't found it yet.

However as long as the Swift frontend forcibly injects the dynamic link we are SOL, so some progress needs to be made in the frontend first.




> On Feb 17, 2016, at 1:37 PM, Max Howell <max.howell at apple.com> wrote:
> 
> We have a ticket open to implement static linking of swift libs.
> 
> If anyone on the Swift team knows how to do this and can comment here then I’m sure we can get it implemented pretty quickly.
> 
>> On Feb 13, 2016, at 7:54 PM, Drew Crawford via swift-users <swift-users at swift.org <mailto:swift-users at swift.org>> wrote:
>> 
>> Whenever I update the installed Linux snapshot, my binaries break, with errors of the form:
>> 
>> [programname]: symbol lookup error: [programname]: undefined symbol: _TFOs7Processau9argumentsGSaSS_
>> 
>> I assume this is the standard library symbol Process.arguments (which is used in my program).
>> 
>> I guess this is because the standard library is not statically linked/embedded in this executable.  This happens by default on OSX, but I guess might not on Linux.
>> 
>> Is that a bug?
>> Is there a way to force statically link the standard library on Linux, so my binaries work without a recompile each new snapshot?
>> 
>> 
>> 
>> 
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> 

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