ELF: Implement basic support for --version-script.
This patch only implements support for version scripts of the form:
{ [ global: symbol1; symbol2; [...]; symbolN; ] local: *; };
No wildcards are supported, other than for the local entry. Symbol versioning
is also not supported.
It works by introducing a new Symbol flag which tracks whether a symbol
appears in the global section of a version script.
This patch also simplifies the logic in SymbolBody::isPreemptible(), and
teaches it to handle the case where symbols with default visibility in DSOs
do not appear in the dynamic symbol table because of a version script.
Fixes PR27482.
Differential Revision: http://reviews.llvm.org/D19430
llvm-svn: 267208
diff --git a/lld/ELF/SymbolListFile.h b/lld/ELF/SymbolListFile.h
new file mode 100644
index 0000000..60362a8
--- /dev/null
+++ b/lld/ELF/SymbolListFile.h
@@ -0,0 +1,25 @@
+//===- SymbolListFile.h -----------------------------------------*- C++ -*-===//
+//
+// The LLVM Linker
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLD_ELF_SYMBOL_LIST_FILE_H
+#define LLD_ELF_SYMBOL_LIST_FILE_H
+
+#include "lld/Core/LLVM.h"
+#include "llvm/Support/MemoryBuffer.h"
+
+namespace lld {
+namespace elf {
+
+void parseDynamicList(MemoryBufferRef MB);
+void parseVersionScript(MemoryBufferRef MB);
+
+} // namespace elf
+} // namespace lld
+
+#endif