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llvm-project/llvm/tools/llvm-config/llvm-config.cpp

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//===-- 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/Config/llvm-config.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/Triple.h"
#include "llvm/ADT/Twine.h"
#include "llvm/Config/config.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/WithColor.h"
#include "llvm/Support/raw_ostream.h"
#include <cstdlib>
#include <set>
#include <unordered_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"
// LinkMode determines what libraries and flags are returned by llvm-config.
enum LinkMode {
// LinkModeAuto will link with the default link mode for the installation,
// which is dependent on the value of LLVM_LINK_LLVM_DYLIB, and fall back
// to the alternative if the required libraries are not available.
LinkModeAuto = 0,
// LinkModeShared will link with the dynamic component libraries if they
// exist, and return an error otherwise.
LinkModeShared = 1,
// LinkModeStatic will link with the static component libraries if they
// exist, and return an error otherwise.
LinkModeStatic = 2,
};
/// 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.
/// \param GetComponentNames - Get the component names instead of the
/// library name.
static void VisitComponent(const std::string &Name,
const StringMap<AvailableComponent *> &ComponentMap,
std::set<AvailableComponent *> &VisitedComponents,
std::vector<std::string> &RequiredLibs,
bool IncludeNonInstalled, bool GetComponentNames,
const std::function<std::string(const StringRef &)>
*GetComponentLibraryPath,
std::vector<std::string> *Missing,
const std::string &DirSep) {
// Lookup the component.
AvailableComponent *AC = ComponentMap.lookup(Name);
if (!AC) {
errs() << "Can't find component: '" << Name << "' in the map. Available components are: ";
for (const auto &Component : ComponentMap) {
errs() << "'" << Component.first() << "' ";
}
errs() << "\n";
report_fatal_error("abort");
}
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;
}
// Only include non-installed components if requested.
if (!AC->IsInstalled && !IncludeNonInstalled)
return;
// Otherwise, visit all the dependencies.
for (unsigned i = 0; AC->RequiredLibraries[i]; ++i) {
VisitComponent(AC->RequiredLibraries[i], ComponentMap, VisitedComponents,
RequiredLibs, IncludeNonInstalled, GetComponentNames,
GetComponentLibraryPath, Missing, DirSep);
}
if (GetComponentNames) {
RequiredLibs.push_back(Name);
return;
}
// Add to the required library list.
if (AC->Library) {
if (Missing && GetComponentLibraryPath) {
std::string path = (*GetComponentLibraryPath)(AC->Library);
if (DirSep == "\\") {
std::replace(path.begin(), path.end(), '/', '\\');
}
if (!sys::fs::exists(path))
Missing->push_back(path);
}
RequiredLibs.push_back(AC->Library);
}
}
/// 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 IncludeNonInstalled - Whether non-installed components should be
/// reported.
/// \param GetComponentNames - True if one would prefer the component names.
static std::vector<std::string> ComputeLibsForComponents(
const std::vector<StringRef> &Components, bool IncludeNonInstalled,
bool GetComponentNames, const std::function<std::string(const StringRef &)>
*GetComponentLibraryPath,
std::vector<std::string> *Missing, const std::string &DirSep) {
std::vector<std::string> 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, IncludeNonInstalled, GetComponentNames,
GetComponentLibraryPath, Missing, DirSep);
}
// 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());
return RequiredLibs;
}
/* *** */
static 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\
--cmakedir Directory containing LLVM cmake modules.\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\
--system-libs System Libraries needed to link against LLVM components.\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\
--assertion-mode Print assertion mode of LLVM tree (ON or OFF).\n\
--build-system Print the build system used to build LLVM (always cmake).\n\
--has-rtti Print whether or not LLVM was built with rtti (YES or NO).\n\
--has-global-isel Print whether or not LLVM was built with global-isel support (ON or OFF).\n\
--shared-mode Print how the provided components can be collectively linked (`shared` or `static`).\n\
--link-shared Link the components as shared libraries.\n\
--link-static Link the component libraries statically.\n\
--ignore-libllvm Ignore libLLVM and link component libraries instead.\n\
Typical components:\n\
all All LLVM libraries (default).\n\
engine Either a native JIT or a bitcode interpreter.\n";
exit(1);
}
/// Compute the path to the main executable.
std::string 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::fs::getMainExecutable(Argv0, P);
}
/// Expand the semi-colon delimited LLVM_DYLIB_COMPONENTS into
/// the full list of components.
std::vector<std::string> GetAllDyLibComponents(const bool IsInDevelopmentTree,
const bool GetComponentNames,
const std::string &DirSep) {
std::vector<StringRef> DyLibComponents;
StringRef DyLibComponentsStr(LLVM_DYLIB_COMPONENTS);
size_t Offset = 0;
while (true) {
const size_t NextOffset = DyLibComponentsStr.find(';', Offset);
DyLibComponents.push_back(DyLibComponentsStr.substr(Offset, NextOffset-Offset));
if (NextOffset == std::string::npos) {
break;
}
Offset = NextOffset + 1;
}
assert(!DyLibComponents.empty());
return ComputeLibsForComponents(DyLibComponents,
/*IncludeNonInstalled=*/IsInDevelopmentTree,
GetComponentNames, nullptr, nullptr, DirSep);
}
int main(int argc, char **argv) {
std::vector<StringRef> Components;
bool PrintLibs = false, PrintLibNames = false, PrintLibFiles = false;
bool PrintSystemLibs = false, PrintSharedMode = 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;
enum { CMakeStyle, CMakeBuildModeStyle } DevelopmentTreeLayout;
llvm::SmallString<256> CurrentPath(GetExecutablePath(argv[0]));
std::string CurrentExecPrefix;
std::string ActiveObjRoot;
// If CMAKE_CFG_INTDIR is given, honor it as build mode.
char const *build_mode = LLVM_BUILDMODE;
#if defined(CMAKE_CFG_INTDIR)
if (!(CMAKE_CFG_INTDIR[0] == '.' && CMAKE_CFG_INTDIR[1] == '\0'))
build_mode = CMAKE_CFG_INTDIR;
#endif
// 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).
if (sys::fs::equivalent(CurrentExecPrefix, LLVM_OBJ_ROOT)) {
IsInDevelopmentTree = true;
DevelopmentTreeLayout = CMakeStyle;
ActiveObjRoot = LLVM_OBJ_ROOT;
} else if (sys::fs::equivalent(CurrentExecPrefix,
Twine(LLVM_OBJ_ROOT) + "/bin")) {
IsInDevelopmentTree = true;
DevelopmentTreeLayout = CMakeBuildModeStyle;
ActiveObjRoot = LLVM_OBJ_ROOT;
} else {
IsInDevelopmentTree = false;
DevelopmentTreeLayout = CMakeStyle; // Initialized to avoid warnings.
}
// Compute various directory locations based on the derived location
// information.
std::string ActivePrefix, ActiveBinDir, ActiveIncludeDir, ActiveLibDir,
ActiveCMakeDir;
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.
switch (DevelopmentTreeLayout) {
case CMakeStyle:
ActiveBinDir = ActiveObjRoot + "/bin";
ActiveLibDir = ActiveObjRoot + "/lib" + LLVM_LIBDIR_SUFFIX;
ActiveCMakeDir = ActiveLibDir + "/cmake/llvm";
break;
case CMakeBuildModeStyle:
ActivePrefix = ActiveObjRoot;
ActiveBinDir = ActiveObjRoot + "/bin/" + build_mode;
ActiveLibDir =
ActiveObjRoot + "/lib" + LLVM_LIBDIR_SUFFIX + "/" + build_mode;
ActiveCMakeDir = ActiveLibDir + "/cmake/llvm";
break;
}
// We need to include files from both the source and object trees.
ActiveIncludeOption =
("-I" + ActiveIncludeDir + " " + "-I" + ActiveObjRoot + "/include");
} else {
ActivePrefix = CurrentExecPrefix;
ActiveIncludeDir = ActivePrefix + "/include";
SmallString<256> path(StringRef(LLVM_TOOLS_INSTALL_DIR));
sys::fs::make_absolute(ActivePrefix, path);
ActiveBinDir = path.str();
ActiveLibDir = ActivePrefix + "/lib" + LLVM_LIBDIR_SUFFIX;
ActiveCMakeDir = ActiveLibDir + "/cmake/llvm";
ActiveIncludeOption = "-I" + ActiveIncludeDir;
}
/// We only use `shared library` mode in cases where the static library form
/// of the components provided are not available; note however that this is
/// skipped if we're run from within the build dir. However, once installed,
/// we still need to provide correct output when the static archives are
/// removed or, as in the case of CMake's `BUILD_SHARED_LIBS`, never present
/// in the first place. This can't be done at configure/build time.
StringRef SharedExt, SharedVersionedExt, SharedDir, SharedPrefix, StaticExt,
StaticPrefix, StaticDir = "lib", DirSep = "/";
const Triple HostTriple(Triple::normalize(LLVM_HOST_TRIPLE));
if (HostTriple.isOSWindows()) {
SharedExt = "dll";
SharedVersionedExt = LLVM_DYLIB_VERSION ".dll";
if (HostTriple.isOSCygMing()) {
StaticExt = "a";
StaticPrefix = "lib";
} else {
StaticExt = "lib";
DirSep = "\\";
std::replace(ActiveObjRoot.begin(), ActiveObjRoot.end(), '/', '\\');
std::replace(ActivePrefix.begin(), ActivePrefix.end(), '/', '\\');
std::replace(ActiveBinDir.begin(), ActiveBinDir.end(), '/', '\\');
std::replace(ActiveLibDir.begin(), ActiveLibDir.end(), '/', '\\');
std::replace(ActiveCMakeDir.begin(), ActiveCMakeDir.end(), '/', '\\');
std::replace(ActiveIncludeOption.begin(), ActiveIncludeOption.end(), '/',
'\\');
}
SharedDir = ActiveBinDir;
StaticDir = ActiveLibDir;
} else if (HostTriple.isOSDarwin()) {
SharedExt = "dylib";
SharedVersionedExt = LLVM_DYLIB_VERSION ".dylib";
StaticExt = "a";
StaticDir = SharedDir = ActiveLibDir;
StaticPrefix = SharedPrefix = "lib";
} else {
// default to the unix values:
SharedExt = "so";
SharedVersionedExt = LLVM_DYLIB_VERSION ".so";
StaticExt = "a";
StaticDir = SharedDir = ActiveLibDir;
StaticPrefix = SharedPrefix = "lib";
}
const bool BuiltDyLib = !!LLVM_ENABLE_DYLIB;
/// CMake style shared libs, ie each component is in a shared library.
const bool BuiltSharedLibs = !!LLVM_ENABLE_SHARED;
bool DyLibExists = false;
const std::string DyLibName =
(SharedPrefix + "LLVM-" + SharedVersionedExt).str();
// If LLVM_LINK_DYLIB is ON, the single shared library will be returned
// for "--libs", etc, if they exist. This behaviour can be overridden with
// --link-static or --link-shared.
bool LinkDyLib = !!LLVM_LINK_DYLIB;
if (BuiltDyLib) {
std::string path((SharedDir + DirSep + DyLibName).str());
if (DirSep == "\\") {
std::replace(path.begin(), path.end(), '/', '\\');
}
DyLibExists = sys::fs::exists(path);
if (!DyLibExists) {
// The shared library does not exist: don't error unless the user
// explicitly passes --link-shared.
LinkDyLib = false;
}
}
LinkMode LinkMode =
(LinkDyLib || BuiltSharedLibs) ? LinkModeShared : LinkModeAuto;
/// Get the component's library name without the lib prefix and the
/// extension. Returns true if Lib is in a recognized format.
auto GetComponentLibraryNameSlice = [&](const StringRef &Lib,
StringRef &Out) {
if (Lib.startswith("lib")) {
unsigned FromEnd;
if (Lib.endswith(StaticExt)) {
FromEnd = StaticExt.size() + 1;
} else if (Lib.endswith(SharedExt)) {
FromEnd = SharedExt.size() + 1;
} else {
FromEnd = 0;
}
if (FromEnd != 0) {
Out = Lib.slice(3, Lib.size() - FromEnd);
return true;
}
}
return false;
};
/// Maps Unixizms to the host platform.
auto GetComponentLibraryFileName = [&](const StringRef &Lib,
const bool Shared) {
std::string LibFileName;
if (Shared) {
if (Lib == DyLibName) {
// Treat the DyLibName specially. It is not a component library and
// already has the necessary prefix and suffix (e.g. `.so`) added so
// just return it unmodified.
assert(Lib.endswith(SharedExt) && "DyLib is missing suffix");
LibFileName = Lib;
} else {
LibFileName = (SharedPrefix + Lib + "." + SharedExt).str();
}
} else {
// default to static
LibFileName = (StaticPrefix + Lib + "." + StaticExt).str();
}
return LibFileName;
};
/// Get the full path for a possibly shared component library.
auto GetComponentLibraryPath = [&](const StringRef &Name, const bool Shared) {
auto LibFileName = GetComponentLibraryFileName(Name, Shared);
if (Shared) {
return (SharedDir + DirSep + LibFileName).str();
} else {
return (StaticDir + DirSep + LibFileName).str();
}
};
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 == "--cmakedir") {
OS << ActiveCMakeDir << '\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 << ((HostTriple.isWindowsMSVCEnvironment()) ? "-LIBPATH:" : "-L")
<< ActiveLibDir << ' ' << LLVM_LDFLAGS << '\n';
} else if (Arg == "--system-libs") {
PrintSystemLibs = true;
} else if (Arg == "--libs") {
PrintLibs = true;
} else if (Arg == "--libnames") {
PrintLibNames = true;
} else if (Arg == "--libfiles") {
PrintLibFiles = true;
} else if (Arg == "--components") {
/// If there are missing static archives and a dylib was
/// built, print LLVM_DYLIB_COMPONENTS instead of everything
/// in the manifest.
std::vector<std::string> Components;
for (unsigned j = 0; j != array_lengthof(AvailableComponents); ++j) {
// Only include non-installed components when in a development tree.
if (!AvailableComponents[j].IsInstalled && !IsInDevelopmentTree)
continue;
Components.push_back(AvailableComponents[j].Name);
if (AvailableComponents[j].Library && !IsInDevelopmentTree) {
std::string path(
GetComponentLibraryPath(AvailableComponents[j].Library, false));
if (DirSep == "\\") {
std::replace(path.begin(), path.end(), '/', '\\');
}
if (DyLibExists && !sys::fs::exists(path)) {
Components =
GetAllDyLibComponents(IsInDevelopmentTree, true, DirSep);
llvm::sort(Components);
break;
}
}
}
for (unsigned I = 0; I < Components.size(); ++I) {
if (I) {
OS << ' ';
}
OS << Components[I];
}
OS << '\n';
} else if (Arg == "--targets-built") {
OS << LLVM_TARGETS_BUILT << '\n';
} else if (Arg == "--host-target") {
OS << Triple::normalize(LLVM_DEFAULT_TARGET_TRIPLE) << '\n';
} else if (Arg == "--build-mode") {
OS << build_mode << '\n';
} else if (Arg == "--assertion-mode") {
#if defined(NDEBUG)
OS << "OFF\n";
#else
OS << "ON\n";
#endif
} else if (Arg == "--build-system") {
OS << LLVM_BUILD_SYSTEM << '\n';
} else if (Arg == "--has-rtti") {
OS << (LLVM_HAS_RTTI ? "YES" : "NO") << '\n';
} else if (Arg == "--has-global-isel") {
OS << (LLVM_HAS_GLOBAL_ISEL ? "ON" : "OFF") << '\n';
} else if (Arg == "--shared-mode") {
PrintSharedMode = true;
} else if (Arg == "--obj-root") {
OS << ActivePrefix << '\n';
} else if (Arg == "--src-root") {
OS << LLVM_SRC_ROOT << '\n';
} else if (Arg == "--ignore-libllvm") {
LinkDyLib = false;
LinkMode = BuiltSharedLibs ? LinkModeShared : LinkModeAuto;
} else if (Arg == "--link-shared") {
LinkMode = LinkModeShared;
} else if (Arg == "--link-static") {
LinkMode = LinkModeStatic;
} else {
usage();
}
} else {
Components.push_back(Arg);
}
}
if (!HasAnyOption)
usage();
if (LinkMode == LinkModeShared && !DyLibExists && !BuiltSharedLibs) {
WithColor::error(errs(), "llvm-config") << DyLibName << " is missing\n";
return 1;
}
if (PrintLibs || PrintLibNames || PrintLibFiles || PrintSystemLibs ||
PrintSharedMode) {
if (PrintSharedMode && BuiltSharedLibs) {
OS << "shared\n";
return 0;
}
// If no components were specified, default to "all".
if (Components.empty())
Components.push_back("all");
// Construct the list of all the required libraries.
std::function<std::string(const StringRef &)>
GetComponentLibraryPathFunction = [&](const StringRef &Name) {
return GetComponentLibraryPath(Name, LinkMode == LinkModeShared);
};
std::vector<std::string> MissingLibs;
std::vector<std::string> RequiredLibs = ComputeLibsForComponents(
Components,
/*IncludeNonInstalled=*/IsInDevelopmentTree, false,
&GetComponentLibraryPathFunction, &MissingLibs, DirSep);
if (!MissingLibs.empty()) {
switch (LinkMode) {
case LinkModeShared:
if (LinkDyLib && !BuiltSharedLibs)
break;
// Using component shared libraries.
for (auto &Lib : MissingLibs)
WithColor::error(errs(), "llvm-config") << "missing: " << Lib << "\n";
return 1;
case LinkModeAuto:
if (DyLibExists) {
LinkMode = LinkModeShared;
break;
}
WithColor::error(errs(), "llvm-config")
<< "component libraries and shared library\n\n";
LLVM_FALLTHROUGH;
case LinkModeStatic:
for (auto &Lib : MissingLibs)
WithColor::error(errs(), "llvm-config") << "missing: " << Lib << "\n";
return 1;
}
} else if (LinkMode == LinkModeAuto) {
LinkMode = LinkModeStatic;
}
if (PrintSharedMode) {
std::unordered_set<std::string> FullDyLibComponents;
std::vector<std::string> DyLibComponents =
GetAllDyLibComponents(IsInDevelopmentTree, false, DirSep);
for (auto &Component : DyLibComponents) {
FullDyLibComponents.insert(Component);
}
DyLibComponents.clear();
for (auto &Lib : RequiredLibs) {
if (!FullDyLibComponents.count(Lib)) {
OS << "static\n";
return 0;
}
}
FullDyLibComponents.clear();
if (LinkMode == LinkModeShared) {
OS << "shared\n";
return 0;
} else {
OS << "static\n";
return 0;
}
}
if (PrintLibs || PrintLibNames || PrintLibFiles) {
auto PrintForLib = [&](const StringRef &Lib) {
const bool Shared = LinkMode == LinkModeShared;
if (PrintLibNames) {
OS << GetComponentLibraryFileName(Lib, Shared);
} else if (PrintLibFiles) {
OS << GetComponentLibraryPath(Lib, Shared);
} else if (PrintLibs) {
// On Windows, output full path to library without parameters.
// Elsewhere, if this is a typical library name, include it using -l.
if (HostTriple.isWindowsMSVCEnvironment()) {
OS << GetComponentLibraryPath(Lib, Shared);
} else {
StringRef LibName;
if (GetComponentLibraryNameSlice(Lib, LibName)) {
// Extract library name (remove prefix and suffix).
OS << "-l" << LibName;
} else {
// Lib is already a library name without prefix and suffix.
OS << "-l" << Lib;
}
}
}
};
if (LinkMode == LinkModeShared && LinkDyLib) {
PrintForLib(DyLibName);
} else {
for (unsigned i = 0, e = RequiredLibs.size(); i != e; ++i) {
auto Lib = RequiredLibs[i];
if (i)
OS << ' ';
PrintForLib(Lib);
}
}
OS << '\n';
}
// Print SYSTEM_LIBS after --libs.
// FIXME: Each LLVM component may have its dependent system libs.
if (PrintSystemLibs) {
// Output system libraries only if linking against a static
// library (since the shared library links to all system libs
// already)
OS << (LinkMode == LinkModeStatic ? LLVM_SYSTEM_LIBS : "") << '\n';
}
} else if (!Components.empty()) {
WithColor::error(errs(), "llvm-config")
<< "components given, but unused\n\n";
usage();
}
return 0;
}
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