August 19, 2019 [Issue 20144] New: standard pragma for weak linkage | ||||
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https://issues.dlang.org/show_bug.cgi?id=20144 Issue ID: 20144 Summary: standard pragma for weak linkage Product: D Version: D2 Hardware: All OS: All Status: NEW Severity: enhancement Priority: P1 Component: dmd Assignee: nobody@puremagic.com Reporter: turkeyman@gmail.com Marking symbols with weak linkage is common, and necessary in a lot of designs. Currently, describing weak linkage is implementation dependent, and also platform dependent. Since D doesn't have a preprocessor, and we have no aliasing mechanism for attributes or pragmas, it's impossible to wrangle all of this into one expression. The language needs to specify a weak linkage pragma, which can be mapped appropriately everywhere. `pragma(weak, true) void fun() {}` for instance; please choose you preferred name. GDC/LDC will map this to their backend directly (where they currently expose implementation defined attributes), DMD needs to implement this, which is mostly trivial. Posix just flags it in the output, and MS/Windows does this by embedding a linker directive in the output. We need this. It is time. -- |
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