[Bug middle-end/92183] gcc tries to create a relocation in a mergeable section

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92183

--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #3)
> It should be easy to fix this in default_elf_select_rtx_section.
> 
> before calling mergeable_constant_section check reloc and return rodata if
> reloc is true.
> 
> Let me see if that fixes this.

yes that fixed it:
```
        .section        .rodata
        .align 8
.LC2:
        .quad   .LC0
        .align 8
.LC3:
        .quad   .LC1
```

The patch itself:
```
diff --git a/gcc/varasm.cc b/gcc/varasm.cc
index 0d78f5b384f..891b4437f1c 100644
--- a/gcc/varasm.cc
+++ b/gcc/varasm.cc
@@ -7757,6 +7757,10 @@ default_elf_select_rtx_section (machine_mode mode, rtx
x,
       return get_section (name, flags | SECTION_LINKONCE, decl);
     }

+  /* Don't output relocations into mergeable sections. */
+  if (reloc)
+    return readonly_data_section;
+
   return mergeable_constant_section (mode, align, 0);
 }

```