From cb497b888aabebe13de431c8a6e7c7d31f4dea0c Mon Sep 17 00:00:00 2001
From: Daniel Dunbar <daniel@zuster.org>
Date: Thu, 1 Dec 2011 20:18:09 +0000
Subject: llvm-config: Replace with C++ version (was llvm-config-2).    -
 Another reapply of r144300, with hopefully one last fix.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145623 91177308-0d34-0410-b5e6-96231b3b80d8
---
 tools/llvm-config-2/llvm-config.cpp | 334 ------------------------------------
 1 file changed, 334 deletions(-)
 delete mode 100644 tools/llvm-config-2/llvm-config.cpp

(limited to 'tools/llvm-config-2/llvm-config.cpp')

diff --git a/tools/llvm-config-2/llvm-config.cpp b/tools/llvm-config-2/llvm-config.cpp
deleted file mode 100644
index bf3357e9f2..0000000000
--- a/tools/llvm-config-2/llvm-config.cpp
+++ /dev/null
@@ -1,334 +0,0 @@
-//===-- llvm-config.cpp - LLVM project configuration utility --------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This tool encapsulates information about an LLVM project configuration for
-// use by other project's build environments (to determine installed path,
-// available features, required libraries, etc.).
-//
-// Note that although this tool *may* be used by some parts of LLVM's build
-// itself (i.e., the Makefiles use it to compute required libraries when linking
-// tools), this tool is primarily designed to support external projects.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/ADT/STLExtras.h"
-#include "llvm/ADT/StringMap.h"
-#include "llvm/ADT/StringRef.h"
-#include "llvm/ADT/Twine.h"
-#include "llvm/Config/config.h"
-#include "llvm/Config/llvm-config.h"
-#include "llvm/Support/FileSystem.h"
-#include "llvm/Support/Path.h"
-#include "llvm/Support/TargetRegistry.h"
-#include "llvm/Support/raw_ostream.h"
-#include <cstdlib>
-#include <set>
-#include <vector>
-
-using namespace llvm;
-
-// Include the build time variables we can report to the user. This is generated
-// at build time from the BuildVariables.inc.in file by the build system.
-#include "BuildVariables.inc"
-
-// Include the component table. This creates an array of struct
-// AvailableComponent entries, which record the component name, library name,
-// and required components for all of the available libraries.
-//
-// Not all components define a library, we also use "library groups" as a way to
-// create entries for pseudo groups like x86 or all-targets.
-#include "LibraryDependencies.inc"
-
-/// \brief Traverse a single component adding to the topological ordering in
-/// \arg RequiredLibs.
-///
-/// \param Name - The component to traverse.
-/// \param ComponentMap - A prebuilt map of component names to descriptors.
-/// \param VisitedComponents [in] [out] - The set of already visited components.
-/// \param RequiredLibs [out] - The ordered list of required libraries.
-static void VisitComponent(StringRef Name,
-                           const StringMap<AvailableComponent*> &ComponentMap,
-                           std::set<AvailableComponent*> &VisitedComponents,
-                           std::vector<StringRef> &RequiredLibs) {
-  // Lookup the component.
-  AvailableComponent *AC = ComponentMap.lookup(Name);
-  assert(AC && "Invalid component name!");
-
-  // Add to the visited table.
-  if (!VisitedComponents.insert(AC).second) {
-    // We are done if the component has already been visited.
-    return;
-  }
-
-  // Otherwise, visit all the dependencies.
-  for (unsigned i = 0; AC->RequiredLibraries[i]; ++i) {
-    VisitComponent(AC->RequiredLibraries[i], ComponentMap, VisitedComponents,
-                   RequiredLibs);
-  }
-
-  // Add to the required library list.
-  if (AC->Library)
-    RequiredLibs.push_back(AC->Library);
-}
-
-/// \brief Compute the list of required libraries for a given list of
-/// components, in an order suitable for passing to a linker (that is, libraries
-/// appear prior to their dependencies).
-///
-/// \param Components - The names of the components to find libraries for.
-/// \param RequiredLibs [out] - On return, the ordered list of libraries that
-/// are required to link the given components.
-void ComputeLibsForComponents(const std::vector<StringRef> &Components,
-                              std::vector<StringRef> &RequiredLibs) {
-  std::set<AvailableComponent*> VisitedComponents;
-
-  // Build a map of component names to information.
-  StringMap<AvailableComponent*> ComponentMap;
-  for (unsigned i = 0; i != array_lengthof(AvailableComponents); ++i) {
-    AvailableComponent *AC = &AvailableComponents[i];
-    ComponentMap[AC->Name] = AC;
-  }
-
-  // Visit the components.
-  for (unsigned i = 0, e = Components.size(); i != e; ++i) {
-    // Users are allowed to provide mixed case component names.
-    std::string ComponentLower = Components[i].lower();
-
-    // Validate that the user supplied a valid component name.
-    if (!ComponentMap.count(ComponentLower)) {
-      llvm::errs() << "llvm-config: unknown component name: " << Components[i]
-                   << "\n";
-      exit(1);
-    }
-
-    VisitComponent(ComponentLower, ComponentMap, VisitedComponents,
-                   RequiredLibs);
-  }
-
-  // The list is now ordered with leafs first, we want the libraries to printed
-  // in the reverse order of dependency.
-  std::reverse(RequiredLibs.begin(), RequiredLibs.end());
-}
-
-/* *** */
-
-void usage() {
-  errs() << "\
-usage: llvm-config <OPTION>... [<COMPONENT>...]\n\
-\n\
-Get various configuration information needed to compile programs which use\n\
-LLVM.  Typically called from 'configure' scripts.  Examples:\n\
-  llvm-config --cxxflags\n\
-  llvm-config --ldflags\n\
-  llvm-config --libs engine bcreader scalaropts\n\
-\n\
-Options:\n\
-  --version         Print LLVM version.\n\
-  --prefix          Print the installation prefix.\n\
-  --src-root        Print the source root LLVM was built from.\n\
-  --obj-root        Print the object root used to build LLVM.\n\
-  --bindir          Directory containing LLVM executables.\n\
-  --includedir      Directory containing LLVM headers.\n\
-  --libdir          Directory containing LLVM libraries.\n\
-  --cppflags        C preprocessor flags for files that include LLVM headers.\n\
-  --cflags          C compiler flags for files that include LLVM headers.\n\
-  --cxxflags        C++ compiler flags for files that include LLVM headers.\n\
-  --ldflags         Print Linker flags.\n\
-  --libs            Libraries needed to link against LLVM components.\n\
-  --libnames        Bare library names for in-tree builds.\n\
-  --libfiles        Fully qualified library filenames for makefile depends.\n\
-  --components      List of all possible components.\n\
-  --targets-built   List of all targets currently built.\n\
-  --host-target     Target triple used to configure LLVM.\n\
-  --build-mode      Print build mode of LLVM tree (e.g. Debug or Release).\n\
-Typical components:\n\
-  all               All LLVM libraries (default).\n\
-  backend           Either a native backend or the C backend.\n\
-  engine            Either a native JIT or a bitcode interpreter.\n";
-  exit(1);
-}
-
-/// \brief Compute the path to the main executable.
-llvm::sys::Path GetExecutablePath(const char *Argv0) {
-  // This just needs to be some symbol in the binary; C++ doesn't
-  // allow taking the address of ::main however.
-  void *P = (void*) (intptr_t) GetExecutablePath;
-  return llvm::sys::Path::GetMainExecutable(Argv0, P);
-}
-
-int main(int argc, char **argv) {
-  std::vector<StringRef> Components;
-  bool PrintLibs = false, PrintLibNames = false, PrintLibFiles = false;
-  bool HasAnyOption = false;
-
-  // llvm-config is designed to support being run both from a development tree
-  // and from an installed path. We try and auto-detect which case we are in so
-  // that we can report the correct information when run from a development
-  // tree.
-  bool IsInDevelopmentTree, DevelopmentTreeLayoutIsCMakeStyle;
-  llvm::SmallString<256> CurrentPath(GetExecutablePath(argv[0]).str());
-  std::string CurrentExecPrefix;
-  std::string ActiveObjRoot;
-
-  // Create an absolute path, and pop up one directory (we expect to be inside a
-  // bin dir).
-  sys::fs::make_absolute(CurrentPath);
-  CurrentExecPrefix = sys::path::parent_path(
-    sys::path::parent_path(CurrentPath)).str();
-
-  // Check to see if we are inside a development tree by comparing to possible
-  // locations (prefix style or CMake style). This could be wrong in the face of
-  // symbolic links, but is good enough.
-  if (CurrentExecPrefix == std::string(LLVM_OBJ_ROOT) + "/" + LLVM_BUILDMODE) {
-    IsInDevelopmentTree = true;
-    DevelopmentTreeLayoutIsCMakeStyle = false;
-
-    // If we are in a development tree, then check if we are in a BuildTools
-    // directory. This indicates we are built for the build triple, but we
-    // always want to provide information for the host triple.
-    if (sys::path::filename(LLVM_OBJ_ROOT) == "BuildTools") {
-      ActiveObjRoot = sys::path::parent_path(LLVM_OBJ_ROOT);
-    } else {
-      ActiveObjRoot = LLVM_OBJ_ROOT;
-    }
-  } else if (CurrentExecPrefix == std::string(LLVM_OBJ_ROOT) + "/bin") {
-    IsInDevelopmentTree = true;
-    DevelopmentTreeLayoutIsCMakeStyle = true;
-    ActiveObjRoot = LLVM_OBJ_ROOT;
-  } else {
-    IsInDevelopmentTree = false;
-  }
-
-  // Compute various directory locations based on the derived location
-  // information.
-  std::string ActivePrefix, ActiveBinDir, ActiveIncludeDir, ActiveLibDir;
-  std::string ActiveIncludeOption;
-  if (IsInDevelopmentTree) {
-    ActiveIncludeDir = std::string(LLVM_SRC_ROOT) + "/include";
-    ActivePrefix = CurrentExecPrefix;
-
-    // CMake organizes the products differently than a normal prefix style
-    // layout.
-    if (DevelopmentTreeLayoutIsCMakeStyle) {
-      ActiveBinDir = ActiveObjRoot + "/bin/" + LLVM_BUILDMODE;
-      ActiveLibDir = ActiveObjRoot + "/lib/" + LLVM_BUILDMODE;
-    } else {
-      ActiveBinDir = ActiveObjRoot + "/" + LLVM_BUILDMODE + "/bin";
-      ActiveLibDir = ActiveObjRoot + "/" + LLVM_BUILDMODE + "/lib";
-    }
-
-    // We need to include files from both the source and object trees.
-    ActiveIncludeOption = ("-I" + ActiveIncludeDir + " " +
-                           "-I" + ActiveObjRoot + "/include");
-  } else {
-    ActivePrefix = CurrentExecPrefix;
-    ActiveIncludeDir = ActivePrefix + "/include";
-    ActiveBinDir = ActivePrefix + "/bin";
-    ActiveLibDir = ActivePrefix + "/lib";
-    ActiveIncludeOption = "-I" + ActiveIncludeDir;
-  }
-
-  raw_ostream &OS = outs();
-  for (int i = 1; i != argc; ++i) {
-    StringRef Arg = argv[i];
-
-    if (Arg.startswith("-")) {
-      HasAnyOption = true;
-      if (Arg == "--version") {
-        OS << PACKAGE_VERSION << '\n';
-      } else if (Arg == "--prefix") {
-        OS << ActivePrefix << '\n';
-      } else if (Arg == "--bindir") {
-        OS << ActiveBinDir << '\n';
-      } else if (Arg == "--includedir") {
-        OS << ActiveIncludeDir << '\n';
-      } else if (Arg == "--libdir") {
-        OS << ActiveLibDir << '\n';
-      } else if (Arg == "--cppflags") {
-        OS << ActiveIncludeOption << ' ' << LLVM_CPPFLAGS << '\n';
-      } else if (Arg == "--cflags") {
-        OS << ActiveIncludeOption << ' ' << LLVM_CFLAGS << '\n';
-      } else if (Arg == "--cxxflags") {
-        OS << ActiveIncludeOption << ' ' << LLVM_CXXFLAGS << '\n';
-      } else if (Arg == "--ldflags") {
-        OS << "-L" << ActiveLibDir << ' ' << LLVM_LDFLAGS
-           << ' ' << LLVM_SYSTEM_LIBS << '\n';
-      } else if (Arg == "--libs") {
-        PrintLibs = true;
-      } else if (Arg == "--libnames") {
-        PrintLibNames = true;
-      } else if (Arg == "--libfiles") {
-        PrintLibFiles = true;
-      } else if (Arg == "--components") {
-        for (unsigned j = 0; j != array_lengthof(AvailableComponents); ++j) {
-          OS << ' ';
-          OS << AvailableComponents[j].Name;
-        }
-        OS << '\n';
-      } else if (Arg == "--targets-built") {
-        bool First = true;
-        for (TargetRegistry::iterator I = TargetRegistry::begin(),
-               E = TargetRegistry::end(); I != E; First = false, ++I) {
-          if (!First)
-            OS << ' ';
-          OS << I->getName();
-        }
-        OS << '\n';
-      } else if (Arg == "--host-target") {
-        OS << LLVM_DEFAULT_TARGET_TRIPLE << '\n';
-      } else if (Arg == "--build-mode") {
-        OS << LLVM_BUILDMODE << '\n';
-      } else if (Arg == "--obj-root") {
-        OS << LLVM_OBJ_ROOT << '\n';
-      } else if (Arg == "--src-root") {
-        OS << LLVM_SRC_ROOT << '\n';
-      } else {
-        usage();
-      }
-    } else {
-      Components.push_back(Arg);
-    }
-  }
-
-  if (!HasAnyOption)
-    usage();
-
-  if (PrintLibs || PrintLibNames || PrintLibFiles) {
-    // Construct the list of all the required libraries.
-    std::vector<StringRef> RequiredLibs;
-    ComputeLibsForComponents(Components, RequiredLibs);
-
-    for (unsigned i = 0, e = RequiredLibs.size(); i != e; ++i) {
-      StringRef Lib = RequiredLibs[i];
-      if (i)
-        OS << ' ';
-
-      if (PrintLibNames) {
-        OS << Lib;
-      } else if (PrintLibFiles) {
-        OS << ActiveLibDir << '/' << Lib;
-      } else if (PrintLibs) {
-        // If this is a typical library name, include it using -l.
-        if (Lib.startswith("lib") && Lib.endswith(".a")) {
-          OS << "-l" << Lib.slice(3, Lib.size()-2);
-          continue;
-        }
-
-        // Otherwise, print the full path.
-        OS << ActiveLibDir << '/' << Lib;
-      }
-    }
-    OS << '\n';
-  } else if (!Components.empty()) {
-    errs() << "llvm-config: error: components given, but unused\n\n";
-    usage();
-  }
-
-  return 0;
-}
-- 
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