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devel/llvm/16/patches/patch-lld_ELF_InputFiles_cpp

@@ -0,0 +1,69 @@
+Index: lld/ELF/InputFiles.cpp
+--- lld/ELF/InputFiles.cpp.orig
++++ lld/ELF/InputFiles.cpp
+@@ -45,6 +45,8 @@ uint32_t InputFile::nextGroupId;
+ 
+ std::unique_ptr<TarWriter> elf::tar;
+ 
++DenseMap<StringRef, StringRef> elf::gnuWarnings;
++
+ // Returns "<internal>", "foo.a(bar.o)" or "baz.o".
+ std::string lld::toString(const InputFile *f) {
+   static std::mutex mu;
+@@ -63,6 +65,17 @@ std::string lld::toString(const InputFile *f) {
+   return std::string(f->toStringCache);
+ }
+ 
++// .gnu.warning.SYMBOL are treated as warning symbols for the given symbol
++void lld::parseGNUWarning(StringRef name, ArrayRef<char> data, size_t size) {
++  if (!name.empty() && name.startswith(".gnu.warning.")) {
++    StringRef wsym = name.substr(13);
++    StringRef s(data.begin());
++    StringRef wng(s.substr(0, size));
++    symtab.insert(wsym)->gwarn = true;
++    gnuWarnings.insert({wsym, wng});
++  }
++}
++
+ static ELFKind getELFKind(MemoryBufferRef mb, StringRef archiveName) {
+   unsigned char size;
+   unsigned char endian;
+@@ -747,6 +760,14 @@ void ObjFile<ELFT>::initializeSections(bool ignoreComd
+     case SHT_RELA:
+     case SHT_NULL:
+       break;
++    case SHT_PROGBITS: {
++      this->sections[i] = createInputSection(i, sec, check(obj.getSectionName(sec, shstrtab)));
++      StringRef name = check(obj.getSectionName(sec, shstrtab));
++      ArrayRef<char> data =
++          CHECK(obj.template getSectionContentsAsArray<char>(sec), this);
++      parseGNUWarning(name, data, sec.sh_size);
++      }
++      break;
+     case SHT_LLVM_SYMPART:
+       ctx.hasSympart.store(true, std::memory_order_relaxed);
+       [[fallthrough]];
+@@ -1349,6 +1370,9 @@ template <class ELFT> void SharedFile::parse() {
+   const ELFFile<ELFT> obj = this->getObj<ELFT>();
+   ArrayRef<Elf_Shdr> sections = getELFShdrs<ELFT>();
+ 
++  StringRef sectionStringTable =
++      CHECK(obj.getSectionStringTable(sections), this);
++
+   const Elf_Shdr *versymSec = nullptr;
+   const Elf_Shdr *verdefSec = nullptr;
+   const Elf_Shdr *verneedSec = nullptr;
+@@ -1371,6 +1395,13 @@ template <class ELFT> void SharedFile::parse() {
+     case SHT_GNU_verneed:
+       verneedSec = &sec;
+       break;
++    case SHT_PROGBITS: {
++      StringRef name = CHECK(obj.getSectionName(sec, sectionStringTable), this);
++      ArrayRef<char> data =
++          CHECK(obj.template getSectionContentsAsArray<char>(sec), this);
++      parseGNUWarning(name, data, sec.sh_size);
++      break;
++    }
+     }
+   }
+