[LLD] symbol not found with PROVIDE script

[DianQK]

I tried the following code. I expect lld to link successful while also removing unused symbols, but it reports symbol not found: bar.

a.s:

.global _start
_start:
 nop
.section .text.foo,"ax",@progbits
.global foo
foo:
 nop
.section .text.bar,"ax",@progbits
.global bar
bar:
 nop

script.t:

PROVIDE(foo = bar);

commands:

llvm-mc -filetype=obj -triple=x86_64 a.s -o a.o
ld.lld -o a_gc a.o --gc-sections -T script.t

output:

ld.lld: error: script.t:1: symbol not found: bar
ld.lld: error: script.t:1: symbol not found: bar
ld.lld: error: script.t:1: symbol not found: bar

cc @MaskRay ebb326a

[MaskRay]

I cannot reproduce ld.lld: error: script.t:1: symbol not found: bar. Are you testing the latest lld?

foo is not in the symbol table. lld considers it unneeded.

[DianQK]

I cannot reproduce ld.lld: error: script.t:1: symbol not found: bar. Are you testing the latest lld?

foo is not in the symbol table. lld considers it unneeded.

Sorry, I mistakenly deleted the definition of foo. I may have forgotten to run the llvm-mc command to verify after the deletion. I have now fixed this description.