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llvm-mirror/tools/llvm-config/llvm-config.cpp
Chandler Carruth ae65e281f3 Update the file headers across all of the LLVM projects in the monorepo 
to reflect the new license.

We understand that people may be surprised that we're moving the header
entirely to discuss the new license. We checked this carefully with the
Foundation's lawyer and we believe this is the correct approach.

Essentially, all code in the project is now made available by the LLVM
project under our new license, so you will see that the license headers
include that license only. Some of our contributors have contributed
code under our old license, and accordingly, we have retained a copy of
our old license notice in the top-level files in each project and
repository.

llvm-svn: 351636
2019-01-19 08:50:56 +00:00

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//===-- llvm-config.cpp - LLVM project configuration utility --------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// 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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