forked from OSchip/llvm-project
fc0aa8424c
In GNU ld, the definition precedence is: regular symbol assignment > relocatable object definition > `PROVIDE` symbol assignment. GNU ld's internal linker scripts define the non-reserved (by C and C++) edata/end/etext with `PROVIDE` so the relocatable object definition takes precedence. This makes sense because `int end;` is valid. We currently redefine such symbols if they are COMMON, but not if they are regular definitions, so `int end;` with -fcommon is essentially a UB in ld.lld. Fix this (also improve consistency and match GNU ld) by using the `isDefined` code path for `isCommon`. In GNU ld, reserved identifiers like `__ehdr_start` do not use `PROVIDE`, while we treat them all as `PROVIDE`, this seems fine. Reviewed By: peter.smith Differential Revision: https://reviews.llvm.org/D120389 |
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| Unit | ||
| wasm | ||
| CMakeLists.txt | ||
| lit.cfg.py | ||
| lit.site.cfg.py.in | ||