[swift-users] question about swift and c callbacks

[Yang Yang]

sorry， i made mistake on compiling. It still report the same link error.

Yang
On Wed, Jan 4, 2017 at 11:20 PM Yang Yang <cometyang at gmail.com> wrote:

> Thanks.
> It compiled successfully now under linux.
>
>
> 2017-01-04 12:29 GMT-06:00 Joe Groff <jgroff at apple.com>:
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>
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> > On Dec 30, 2016, at 11:17 AM, Yang Yang via swift-users <
> swift-users at swift.org> wrote:
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> >
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> > I try to wrap a c library in swift package named Test.
>
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> > The code looks like this:
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> >
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> > Test1.h
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> >
>
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> > struct MyParams {
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> >       int (*func)();
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> > };
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> >
>
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> > typedef struct MyParams MyParams;
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> >
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>
> > Test2.h
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> > #include "Test1.h"
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> >
>
>
> > static int test(){
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> >   return 0;
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> > }
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> >
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> > void myTest()
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> > {
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> >       MyParams params;
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> >       params.func = test;
>
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> > }
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> >
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> >
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> > Then I try to import the package into swift code and use
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> > in Test.swift.
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> > ************************
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> > import Test
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> >
>
>
> > class TestSwift {
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> >   func runtest(){
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> >     myTest()
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> >   }
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> > }
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> >
>
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> > However, the compiler report link error:
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> > function myTest: error: undefined reference to 'test'
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> >
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> > If I comment out
>
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> > "params.func = test;" in myTest.
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> >
>
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> > It successfully build. How should I handle this situation?
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> Try making `test` static inline instead of just static.
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> -Joe
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