[lld] [lld/ELF] Warn on conflicting SHF_X86_64_LARGE flag (PR #72335)

[Arthur Eubanks via llvm-commits]

================
@@ -149,6 +149,15 @@ void OutputSection::commitSection(InputSection *isec) {
       error("incompatible section flags for " + name + "\n>>> " +
             toString(isec) + ": 0x" + utohexstr(isec->flags) +
             "\n>>> output section " + name + ": 0x" + utohexstr(flags));
+    if (config->emachine == EM_X86_64) {
+      if ((flags ^ isec->flags) & SHF_X86_64_LARGE) {
+        InputSection *conflictISec = getFirstInputSection(this);
+        warn("incompatible SHF_X86_64_LARGE section flag for " + name +
----------------
aeubanks wrote:

done. should the error message above do the same?

https://github.com/llvm/llvm-project/pull/72335