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Fix #21241 - ImportC: wrong static function called after linking#21242

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thewilsonator merged 1 commit intodlang:masterfrom
drpriver:fix-21241
Apr 16, 2025
Merged

Fix #21241 - ImportC: wrong static function called after linking#21242
thewilsonator merged 1 commit intodlang:masterfrom
drpriver:fix-21241

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Fixes #21241

C Static functions were being given the same externally mangled name as their identifier, which caused only one to be picked when linking with linkers that supported that.

Additionally, the dmd glue code was only outputting one of these static functions as a workaround for a different linker issue.

Solve this by giving C static functions a unique name (by using D mangling) and adding an isStatic() check to the dmd glue hack.

Fixes dlang#21241

C Static functions were being given the same externally mangled
name as their identifier, which caused only one to be picked
when linking with linkers that supported that.

Additionally, the dmd glue code was only outputting one of these
static functions as a workaround for a different linker issue.

Solve this by giving C static functions a unique name (by using D
mangling) and adding an `isStatic()` check to the dmd glue hack.
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Thanks for your pull request and interest in making D better, @drpriver! We are looking forward to reviewing it, and you should be hearing from a maintainer soon.
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Testing this PR locally

If you don't have a local development environment setup, you can use Digger to test this PR:

dub run digger -- build "master + dmd#21242"

@thewilsonator thewilsonator merged commit 1244ef2 into dlang:master Apr 16, 2025
27 of 41 checks passed
@drpriver drpriver deleted the fix-21241 branch April 16, 2025 04:06
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ImportC: wrong static function called after linking when static functions in different C imports have same name

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