[lld] [lld][WebAssembly] Report Unsupported PIC Relocations as Errors (PR #104926)

[Luc Blaeser via llvm-commits]

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@@ -0,0 +1,39 @@
+# RUN: llvm-mc -filetype=obj -triple=wasm32-unknown-unknown -o %t.o %s
+
+# RUN: not wasm-ld --experimental-pic -shared %t.o -o /dev/null 2>&1 | \
+# RUN:   FileCheck %s
+
+# RUN: not wasm-ld --experimental-pic -shared %t.o -o /dev/null  --unresolved-symbols=report-all 2>&1 | \
+# RUN:   FileCheck %s
+
+# RUN: not wasm-ld --experimental-pic -shared %t.o -o /dev/null  --warn-unresolved-symbols 2>&1 | \
+# RUN:   FileCheck %s
+
+# RUN: not wasm-ld --experimental-pic -shared %t.o -o /dev/null  --unresolved-symbols=ignore-all 2>&1 | \
+# RUN:   FileCheck %s
+
+# RUN: not wasm-ld --experimental-pic -shared %t.o -o /dev/null  --unresolved-symbols=import-dynamic 2>&1 | \
+# RUN:   FileCheck %s
+
+.functype external_func () -> ()
+
+use_undefined_function:
+    .functype use_undefined_function () -> ()
+    i32.const external_func at TBREL
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luc-blaeser wrote:

I was using Rust and emitted LLVM IR that I manually compiled down to a Wasm object file.  During testing, I once missed a LLVM IR input file and then saw those relocations on unused functions, without getting an error. It is certainly an edge case.

https://github.com/llvm/llvm-project/pull/104926