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https://github.com/c64scene-ar/llvm-6502.git
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- Hopefully fixes PR11600 (untested). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156865 91177308-0d34-0410-b5e6-96231b3b80d8
357 lines
14 KiB
C++
357 lines
14 KiB
C++
//===-- llvm-config.cpp - LLVM project configuration utility --------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This tool encapsulates information about an LLVM project configuration for
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// use by other project's build environments (to determine installed path,
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// available features, required libraries, etc.).
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//
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// Note that although this tool *may* be used by some parts of LLVM's build
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// itself (i.e., the Makefiles use it to compute required libraries when linking
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// tools), this tool is primarily designed to support external projects.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/ADT/StringMap.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/ADT/Twine.h"
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#include "llvm/Config/config.h"
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#include "llvm/Config/llvm-config.h"
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#include "llvm/Support/FileSystem.h"
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#include "llvm/Support/Path.h"
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#include "llvm/Support/raw_ostream.h"
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#include <cstdlib>
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#include <set>
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#include <vector>
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using namespace llvm;
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// Include the build time variables we can report to the user. This is generated
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// at build time from the BuildVariables.inc.in file by the build system.
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#include "BuildVariables.inc"
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// Include the component table. This creates an array of struct
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// AvailableComponent entries, which record the component name, library name,
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// and required components for all of the available libraries.
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//
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// Not all components define a library, we also use "library groups" as a way to
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// create entries for pseudo groups like x86 or all-targets.
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#include "LibraryDependencies.inc"
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/// \brief Traverse a single component adding to the topological ordering in
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/// \arg RequiredLibs.
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///
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/// \param Name - The component to traverse.
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/// \param ComponentMap - A prebuilt map of component names to descriptors.
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/// \param VisitedComponents [in] [out] - The set of already visited components.
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/// \param RequiredLibs [out] - The ordered list of required libraries.
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static void VisitComponent(StringRef Name,
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const StringMap<AvailableComponent*> &ComponentMap,
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std::set<AvailableComponent*> &VisitedComponents,
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std::vector<StringRef> &RequiredLibs,
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bool IncludeNonInstalled) {
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// Lookup the component.
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AvailableComponent *AC = ComponentMap.lookup(Name);
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assert(AC && "Invalid component name!");
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// Add to the visited table.
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if (!VisitedComponents.insert(AC).second) {
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// We are done if the component has already been visited.
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return;
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}
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// Only include non-installed components if requested.
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if (!AC->IsInstalled && !IncludeNonInstalled)
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return;
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// Otherwise, visit all the dependencies.
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for (unsigned i = 0; AC->RequiredLibraries[i]; ++i) {
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VisitComponent(AC->RequiredLibraries[i], ComponentMap, VisitedComponents,
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RequiredLibs, IncludeNonInstalled);
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}
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// Add to the required library list.
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if (AC->Library)
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RequiredLibs.push_back(AC->Library);
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}
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/// \brief Compute the list of required libraries for a given list of
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/// components, in an order suitable for passing to a linker (that is, libraries
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/// appear prior to their dependencies).
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///
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/// \param Components - The names of the components to find libraries for.
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/// \param RequiredLibs [out] - On return, the ordered list of libraries that
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/// are required to link the given components.
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/// \param IncludeNonInstalled - Whether non-installed components should be
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/// reported.
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void ComputeLibsForComponents(const std::vector<StringRef> &Components,
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std::vector<StringRef> &RequiredLibs,
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bool IncludeNonInstalled) {
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std::set<AvailableComponent*> VisitedComponents;
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// Build a map of component names to information.
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StringMap<AvailableComponent*> ComponentMap;
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for (unsigned i = 0; i != array_lengthof(AvailableComponents); ++i) {
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AvailableComponent *AC = &AvailableComponents[i];
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ComponentMap[AC->Name] = AC;
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}
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// Visit the components.
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for (unsigned i = 0, e = Components.size(); i != e; ++i) {
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// Users are allowed to provide mixed case component names.
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std::string ComponentLower = Components[i].lower();
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// Validate that the user supplied a valid component name.
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if (!ComponentMap.count(ComponentLower)) {
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llvm::errs() << "llvm-config: unknown component name: " << Components[i]
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<< "\n";
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exit(1);
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}
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VisitComponent(ComponentLower, ComponentMap, VisitedComponents,
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RequiredLibs, IncludeNonInstalled);
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}
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// The list is now ordered with leafs first, we want the libraries to printed
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// in the reverse order of dependency.
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std::reverse(RequiredLibs.begin(), RequiredLibs.end());
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}
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/* *** */
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void usage() {
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errs() << "\
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usage: llvm-config <OPTION>... [<COMPONENT>...]\n\
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\n\
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Get various configuration information needed to compile programs which use\n\
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LLVM. Typically called from 'configure' scripts. Examples:\n\
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llvm-config --cxxflags\n\
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llvm-config --ldflags\n\
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llvm-config --libs engine bcreader scalaropts\n\
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\n\
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Options:\n\
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--version Print LLVM version.\n\
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--prefix Print the installation prefix.\n\
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--src-root Print the source root LLVM was built from.\n\
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--obj-root Print the object root used to build LLVM.\n\
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--bindir Directory containing LLVM executables.\n\
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--includedir Directory containing LLVM headers.\n\
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--libdir Directory containing LLVM libraries.\n\
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--cppflags C preprocessor flags for files that include LLVM headers.\n\
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--cflags C compiler flags for files that include LLVM headers.\n\
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--cxxflags C++ compiler flags for files that include LLVM headers.\n\
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--ldflags Print Linker flags.\n\
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--libs Libraries needed to link against LLVM components.\n\
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--libnames Bare library names for in-tree builds.\n\
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--libfiles Fully qualified library filenames for makefile depends.\n\
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--components List of all possible components.\n\
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--targets-built List of all targets currently built.\n\
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--host-target Target triple used to configure LLVM.\n\
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--build-mode Print build mode of LLVM tree (e.g. Debug or Release).\n\
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Typical components:\n\
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all All LLVM libraries (default).\n\
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engine Either a native JIT or a bitcode interpreter.\n";
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exit(1);
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}
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/// \brief Compute the path to the main executable.
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llvm::sys::Path GetExecutablePath(const char *Argv0) {
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// This just needs to be some symbol in the binary; C++ doesn't
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// allow taking the address of ::main however.
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void *P = (void*) (intptr_t) GetExecutablePath;
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return llvm::sys::Path::GetMainExecutable(Argv0, P);
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}
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int main(int argc, char **argv) {
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std::vector<StringRef> Components;
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bool PrintLibs = false, PrintLibNames = false, PrintLibFiles = false;
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bool HasAnyOption = false;
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// llvm-config is designed to support being run both from a development tree
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// and from an installed path. We try and auto-detect which case we are in so
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// that we can report the correct information when run from a development
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// tree.
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bool IsInDevelopmentTree;
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enum { MakefileStyle, CMakeStyle, CMakeBuildModeStyle } DevelopmentTreeLayout;
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llvm::SmallString<256> CurrentPath(GetExecutablePath(argv[0]).str());
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std::string CurrentExecPrefix;
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std::string ActiveObjRoot;
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// Create an absolute path, and pop up one directory (we expect to be inside a
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// bin dir).
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sys::fs::make_absolute(CurrentPath);
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CurrentExecPrefix = sys::path::parent_path(
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sys::path::parent_path(CurrentPath)).str();
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// Check to see if we are inside a development tree by comparing to possible
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// locations (prefix style or CMake style).
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if (sys::fs::equivalent(CurrentExecPrefix,
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Twine(LLVM_OBJ_ROOT) + "/" + LLVM_BUILDMODE)) {
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IsInDevelopmentTree = true;
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DevelopmentTreeLayout = MakefileStyle;
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// If we are in a development tree, then check if we are in a BuildTools
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// directory. This indicates we are built for the build triple, but we
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// always want to provide information for the host triple.
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if (sys::path::filename(LLVM_OBJ_ROOT) == "BuildTools") {
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ActiveObjRoot = sys::path::parent_path(LLVM_OBJ_ROOT);
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} else {
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ActiveObjRoot = LLVM_OBJ_ROOT;
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}
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} else if (sys::fs::equivalent(CurrentExecPrefix, LLVM_OBJ_ROOT)) {
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IsInDevelopmentTree = true;
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DevelopmentTreeLayout = CMakeStyle;
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ActiveObjRoot = LLVM_OBJ_ROOT;
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} else if (sys::fs::equivalent(CurrentExecPrefix,
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Twine(LLVM_OBJ_ROOT) + "/bin")) {
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IsInDevelopmentTree = true;
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DevelopmentTreeLayout = CMakeBuildModeStyle;
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ActiveObjRoot = LLVM_OBJ_ROOT;
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} else {
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IsInDevelopmentTree = false;
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DevelopmentTreeLayout = MakefileStyle; // Initialized to avoid warnings.
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}
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// Compute various directory locations based on the derived location
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// information.
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std::string ActivePrefix, ActiveBinDir, ActiveIncludeDir, ActiveLibDir;
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std::string ActiveIncludeOption;
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if (IsInDevelopmentTree) {
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ActiveIncludeDir = std::string(LLVM_SRC_ROOT) + "/include";
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ActivePrefix = CurrentExecPrefix;
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// CMake organizes the products differently than a normal prefix style
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// layout.
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switch (DevelopmentTreeLayout) {
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case MakefileStyle:
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ActiveBinDir = ActiveObjRoot + "/" + LLVM_BUILDMODE + "/bin";
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ActiveLibDir = ActiveObjRoot + "/" + LLVM_BUILDMODE + "/lib";
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break;
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case CMakeStyle:
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ActiveBinDir = ActiveObjRoot + "/bin";
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ActiveLibDir = ActiveObjRoot + "/lib";
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break;
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case CMakeBuildModeStyle:
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ActiveBinDir = ActiveObjRoot + "/bin/" + LLVM_BUILDMODE;
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ActiveLibDir = ActiveObjRoot + "/lib/" + LLVM_BUILDMODE;
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break;
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}
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// We need to include files from both the source and object trees.
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ActiveIncludeOption = ("-I" + ActiveIncludeDir + " " +
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"-I" + ActiveObjRoot + "/include");
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} else {
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ActivePrefix = CurrentExecPrefix;
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ActiveIncludeDir = ActivePrefix + "/include";
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ActiveBinDir = ActivePrefix + "/bin";
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ActiveLibDir = ActivePrefix + "/lib";
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ActiveIncludeOption = "-I" + ActiveIncludeDir;
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}
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raw_ostream &OS = outs();
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for (int i = 1; i != argc; ++i) {
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StringRef Arg = argv[i];
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if (Arg.startswith("-")) {
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HasAnyOption = true;
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if (Arg == "--version") {
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OS << PACKAGE_VERSION << '\n';
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} else if (Arg == "--prefix") {
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OS << ActivePrefix << '\n';
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} else if (Arg == "--bindir") {
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OS << ActiveBinDir << '\n';
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} else if (Arg == "--includedir") {
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OS << ActiveIncludeDir << '\n';
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} else if (Arg == "--libdir") {
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OS << ActiveLibDir << '\n';
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} else if (Arg == "--cppflags") {
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OS << ActiveIncludeOption << ' ' << LLVM_CPPFLAGS << '\n';
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} else if (Arg == "--cflags") {
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OS << ActiveIncludeOption << ' ' << LLVM_CFLAGS << '\n';
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} else if (Arg == "--cxxflags") {
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OS << ActiveIncludeOption << ' ' << LLVM_CXXFLAGS << '\n';
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} else if (Arg == "--ldflags") {
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OS << "-L" << ActiveLibDir << ' ' << LLVM_LDFLAGS
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<< ' ' << LLVM_SYSTEM_LIBS << '\n';
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} else if (Arg == "--libs") {
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PrintLibs = true;
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} else if (Arg == "--libnames") {
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PrintLibNames = true;
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} else if (Arg == "--libfiles") {
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PrintLibFiles = true;
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} else if (Arg == "--components") {
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for (unsigned j = 0; j != array_lengthof(AvailableComponents); ++j) {
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// Only include non-installed components when in a development tree.
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if (!AvailableComponents[j].IsInstalled && !IsInDevelopmentTree)
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continue;
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OS << ' ';
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OS << AvailableComponents[j].Name;
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}
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OS << '\n';
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} else if (Arg == "--targets-built") {
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OS << LLVM_TARGETS_BUILT << '\n';
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} else if (Arg == "--host-target") {
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OS << LLVM_DEFAULT_TARGET_TRIPLE << '\n';
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} else if (Arg == "--build-mode") {
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OS << LLVM_BUILDMODE << '\n';
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} else if (Arg == "--obj-root") {
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OS << LLVM_OBJ_ROOT << '\n';
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} else if (Arg == "--src-root") {
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OS << LLVM_SRC_ROOT << '\n';
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} else {
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usage();
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}
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} else {
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Components.push_back(Arg);
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}
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}
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if (!HasAnyOption)
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usage();
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if (PrintLibs || PrintLibNames || PrintLibFiles) {
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// If no components were specified, default to "all".
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if (Components.empty())
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Components.push_back("all");
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// Construct the list of all the required libraries.
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std::vector<StringRef> RequiredLibs;
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ComputeLibsForComponents(Components, RequiredLibs,
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/*IncludeNonInstalled=*/IsInDevelopmentTree);
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for (unsigned i = 0, e = RequiredLibs.size(); i != e; ++i) {
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StringRef Lib = RequiredLibs[i];
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if (i)
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OS << ' ';
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if (PrintLibNames) {
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OS << Lib;
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} else if (PrintLibFiles) {
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OS << ActiveLibDir << '/' << Lib;
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} else if (PrintLibs) {
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// If this is a typical library name, include it using -l.
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if (Lib.startswith("lib") && Lib.endswith(".a")) {
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OS << "-l" << Lib.slice(3, Lib.size()-2);
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continue;
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}
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// Otherwise, print the full path.
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OS << ActiveLibDir << '/' << Lib;
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}
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}
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OS << '\n';
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} else if (!Components.empty()) {
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errs() << "llvm-config: error: components given, but unused\n\n";
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usage();
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}
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return 0;
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}
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