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[Linker] Drop support for IR-level extended linking support (archives, etc.).

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- This code is dead, and the "right" way to get this support is to use the
   platform-specific linker-integrated LTO mechanisms, or the forthcoming LLVM
   linker.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172749 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Daniel Dunbar
2013-01-17 19:52:25 +00:00
parent d69a43a88d
commit 634bd8512a
6 changed files with 3 additions and 577 deletions
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67
lib/Linker/Linker.cpp
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@ -112,70 +112,3 @@ Linker::LoadObject(const sys::Path &FN) {
Error += ": " + ParseErrorMessage;
return std::auto_ptr<Module>();
}
// IsLibrary - Determine if "Name" is a library in "Directory". Return
// a non-empty sys::Path if its found, an empty one otherwise.
static inline sys::Path IsLibrary(StringRef Name,
const sys::Path &Directory) {
sys::Path FullPath(Directory);
// Try the libX.a form
FullPath.appendComponent(("lib" + Name).str());
FullPath.appendSuffix("a");
if (FullPath.isArchive())
return FullPath;
// Try the libX.bca form
FullPath.eraseSuffix();
FullPath.appendSuffix("bca");
if (FullPath.isArchive())
return FullPath;
// Try the libX.so (or .dylib) form
FullPath.eraseSuffix();
FullPath.appendSuffix(sys::Path::GetDLLSuffix());
if (FullPath.isDynamicLibrary()) // Native shared library?
return FullPath;
if (FullPath.isBitcodeFile()) // .so file containing bitcode?
return FullPath;
// Try libX form, to make it possible to add dependency on the
// specific version of .so, like liblzma.so.1.0.0
FullPath.eraseSuffix();
if (FullPath.isDynamicLibrary()) // Native shared library?
return FullPath;
if (FullPath.isBitcodeFile()) // .so file containing bitcode?
return FullPath;
// Not found .. fall through
// Indicate that the library was not found in the directory.
FullPath.clear();
return FullPath;
}
/// FindLib - Try to convert Filename into the name of a file that we can open,
/// if it does not already name a file we can open, by first trying to open
/// Filename, then libFilename.[suffix] for each of a set of several common
/// library suffixes, in each of the directories in LibPaths. Returns an empty
/// Path if no matching file can be found.
///
sys::Path
Linker::FindLib(StringRef Filename) {
// Determine if the pathname can be found as it stands.
sys::Path FilePath(Filename);
if (FilePath.canRead() &&
(FilePath.isArchive() || FilePath.isDynamicLibrary()))
return FilePath;
// Iterate over the directories in Paths to see if we can find the library
// there.
for (unsigned Index = 0; Index != LibPaths.size(); ++Index) {
sys::Path Directory(LibPaths[Index]);
sys::Path FullPath = IsLibrary(Filename, Directory);
if (!FullPath.isEmpty())
return FullPath;
}
return sys::Path();
}