Hi all I m trying to introduce a rust library to KMP but I d

Question

Hi all I m trying to introduce a rust library to KMP but I don t know how to configure ios cinterops I ve tried to build an xcode project to verify that the ` h` ` a` is working but currently in KMP it prompts ```Undefined symbols for architecture x86 64 CTFontGetXHeight referenced from SkScalerContext Mac generateFontMetrics SkFontMetrics in libskia a fontmgr mac ct SkScalerContext mac ct o CTFontGetUnderlineThickness referenced from SkScalerContext Mac generateFontMetrics SkFontMetrics in libskia a fontmgr mac ct SkScalerContext mac ct o CTFontGetUnderlinePosition referenced from SkScalerContext Mac generateFontMetrics SkFontMetrics in libskia a fontmgr mac ct SkScalerContext mac ct o CTFontGetAdvancesForGlyphs referenced from SkScalerContext Mac generateMetrics SkGlyph SkArenaAlloc in libskia a fontmgr mac ct SkScalerContext mac ct o CTFontCreatePathForGlyph referenced from SkScalerContext Mac generateMetrics SkGlyph SkArenaAlloc in libskia a fontmgr mac ct SkScalerContext mac ct o SkScalerContext Mac generatePath SkGlyph const amp SkPath in libskia a fontmgr mac ct SkScalerContext mac ct o CTFontDrawGlyphs referenced from SkCTFontGetSmoothBehavior in libskia a libskia SkCTFont o SkScalerContext Mac Offscreen getCG SkScalerContext Mac const amp SkGlyph const amp unsigned short unsigned long bool in libskia a fontmgr mac ct SkScalerContext mac ct o kCTFontVariationAxisMinimumValueKey referenced from SkCTVariationFromSkFontArguments CTFont const SkFontArguments const amp in libskia a fontmgr mac ct SkTypeface mac ct o SkTypeface Mac onGetVariationDesignParameters SkFontParameters Variation Axis int const in libskia a fontmgr mac ct SkTypeface mac ct o CTFontGetSize referenced from CTFontGetSymbolicTraits referenced from create from name char const SkFontStyle const amp in libskia a fontmgr mac ct SkFontMgr mac ct o SkTypeface Mac Make std 1 unique ptr lt CTFont const SkFunctionWrapper lt void void const amp CFRelease gt gt OpszVariation std 1 unique ptr lt SkStreamAsset std 1 default delete lt SkStreamAsset gt gt $ 0 operator const in libskia a fontmgr mac ct SkTypeface mac ct o SkTypeface Mac onGetAdvancedMetrics const in libskia a fontmgr mac ct SkTypeface mac ct o kCTFontFamilyNameKey referenced from SkTypeface Mac onCreateFamilyNameIterator const in libskia a fontmgr mac ct SkTypeface mac ct o CTFontCollectionCreateMatchingFontDescriptors referenced from anonymous namespace SkCopyAvailableFontFamilyNames CTFontCollection const in libskia a fontmgr mac ct SkFontMgr mac ct o CTFontCopyAttribute referenced from SkCTFontCreateExactCopy CTFont const double OpszVariation in libskia a fontmgr mac ct SkTypeface mac ct o SkTypeface Mac onOpenStream int const in libskia a fontmgr mac ct SkTypeface mac ct o CTFontCreateForString referenced from SkFontMgr Mac onMatchFamilyStyleCharacter char const SkFontStyle const amp char const int int const in libskia a fontmgr mac ct SkFontMgr mac ct o ld symbol s not found for architecture x86 64``` demo <https github com qdsfdhvh compose hellorust>

napperley · Answer

Do note that Kotlin Native doesn t provide any Rust interop Interoperability with Rust isn t supported

kpgalligan · Answer

It would if rust exposes C interop yes

napperley · Answer

If rust generates a C compliant API then that would work with Kotlin Native via its C interop This doesn t automatically mean that Rust interop is supported since that would require direct communication between Kotlin and Rust without an intermediate API getting in the way

kpgalligan · Answer

Well I mean I would assume anybody trying to interop with Rust would expose a C interface AFAIK that s the only reasonable way to interop with Rust

kpgalligan · Answer

That is me making assumptions Definitely no direct interop

kpgalligan · Answer

Looking at the errors that does look like what the OP is trying to do

napperley · Answer

Not surprising since C in some ways acts as a common language for many native platforms APIs like JS does for web APIs

napperley · Answer

I m not familiar with how Rust generates C APIs Does Rust only generate header files or does it generate header and library files aka traditional C library

napperley · Answer

Looks like the OP hasn t setup the configuration properly for generating the C library from Rust Some libraries like LVGL for example <https docs lvgl io 8 porting project html configuration file> use configuration to determine which symbols to include in library files to keep the file size down as much as possible common in Embedded environments