ELF2: Avoid using "finalize" as a function name.

"finalize" does not give a hint about what that function is actually
going to do. This patch make it more specific by renaming scanShlibUndefined.
Also add a comment that we basically ignore undefined symbols in DSOs except
this function.

llvm-svn: 250191

lld/ELF/Driver.cpp

@@ -227,6 +227,6 @@ template <class ELFT> void LinkerDriver::link(opt::InputArgList &Args) {
     Config->OutputFile = "a.out";
 
   // Write the result to the file.
-  Symtab.finalize();
+  Symtab.scanShlibUndefined();
   writeResult<ELFT>(&Symtab);
 }

lld/ELF/SymbolTable.cpp

@@ -237,13 +237,14 @@ template <class ELFT> void SymbolTable<ELFT>::addMemberFile(Lazy *Body) {
   addFile(std::move(File));
 }
 
-template <class ELFT> void SymbolTable<ELFT>::finalize() {
-  // This code takes care of the case in which shared libraries depend on
-  // the user program (not the other way, which is usual). Shared libraries
-  // may have undefined symbols, expecting that the user program provides
-  // the definitions for them. An example is BSD's __progname symbol.
-  // We need to put such symbols to the main program's .dynsym so that
-  // shared libraries can find them.
+// This function takes care of the case in which shared libraries depend on
+// the user program (not the other way, which is usual). Shared libraries
+// may have undefined symbols, expecting that the user program provides
+// the definitions for them. An example is BSD's __progname symbol.
+// We need to put such symbols to the main program's .dynsym so that
+// shared libraries can find them.
+// Except this, we ignore undefined symbols in DSOs.
+template <class ELFT> void SymbolTable<ELFT>::scanShlibUndefined() {
   for (std::unique_ptr<SharedFile<ELFT>> &File : SharedFiles)
     for (StringRef U : File->getUndefinedSymbols())
       if (SymbolBody *Sym = find(U))

lld/ELF/SymbolTable.h

@@ -52,7 +52,7 @@ public:
   void addSyntheticSym(StringRef Name, OutputSection<ELFT> &Section,
                        typename llvm::object::ELFFile<ELFT>::uintX_t Value);
   void addIgnoredSym(StringRef Name);
-  void finalize();
+  void scanShlibUndefined();
 
 private:
   Symbol *insert(SymbolBody *New);