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Implicitly getting a new option by linking to support.o instead of support.a 

is a bad idea.  Make tools that want the option #include PluginSupport.h
explicitly.

llvm-svn: 14738
This commit is contained in:
Chris Lattner 2004-07-11 01:04:33 +00:00
parent 92f4e1e0aa
commit 99dcad4584
1 changed files with 8 additions and 23 deletions
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31
llvm/lib/Support/PluginLoader.cpp
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@ -7,34 +7,19 @@
//
//===----------------------------------------------------------------------===//
//
// This file implements the -load <plugin> command line option processor. When
// linked into a program, this new command line option is available that allows
// users to load shared objects into the running program.
//
// Note that there are no symbols exported by the .o file generated for this
// .cpp file. Because of this, a program must link against support.o instead of
// support.a: otherwise this translation unit will not be included.
// This file implements the -load <plugin> command line option handler.
//
//===----------------------------------------------------------------------===//
#define DONT_GET_PLUGIN_LOADER_OPTION
#include "Support/PluginLoader.h"
#include "Support/DynamicLinker.h"
#include "Support/CommandLine.h"
#include "Config/config.h"
#include <iostream>
using namespace llvm;
namespace {
struct PluginLoader {
void operator=(const std::string &Filename) {
std::string ErrorMessage;
if (LinkDynamicObject (Filename.c_str (), &ErrorMessage))
std::cerr << "Error opening '" << Filename << "': " << ErrorMessage
<< "\n -load request ignored.\n";
}
};
void PluginLoader::operator=(const std::string &Filename) {
std::string ErrorMessage;
if (LinkDynamicObject(Filename.c_str(), &ErrorMessage))
std::cerr << "Error opening '" << Filename << "': " << ErrorMessage
<< "\n -load request ignored.\n";
}
// This causes operator= above to be invoked for every -load option.
static cl::opt<PluginLoader, false, cl::parser<std::string> >
LoadOpt("load", cl::ZeroOrMore, cl::value_desc("plugin" SHLIBEXT),
cl::desc("Load the specified plugin"));