12e5efd710
It's not currently possible to build cgo programs that are partially compiled with gcc-15 on riscv64 using the internal linker. There are two reasons for this. 1. When gcc-15 compiles _cgo_export.c, which contains no actual code, for a riscv64 target, it emits a label in the .text section called .Letext0. This label is referred to by another section, .debug_line, and an entry is generated in the symbol table for it. The Go linker panics when processing the .Letext0 symbol in _cgo_export.o, as it occurs in an empty section. 2. GCC-15 is generating additional debug symbols with the .LVUS prefix, e.g., .LVUS33, that need to be ignored. We fix the issue by removing the check in cmd/link/internal/loader/loader.go that panics if we encounter a symbol in an empty section (the comments preceding this check suggest it's safe to remove it) and by adding .LVUS to the list of symbol prefixes to ignore. Fixes #72840 Change-Id: I00658b6bdd01606dde1581b5bc2f42edfc37de82 Reviewed-on: https://go-review.googlesource.com/c/go/+/668276 Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Dmitri Shuralyov <dmitshur@google.com> Reviewed-by: Joel Sing <joel@sing.id.au> Reviewed-by: Carlos Amedee <carlos@golang.org> Reviewed-by: Meng Zhuo <mengzhuo1203@gmail.com>
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