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/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
file Copyright.txt or https://cmake.org/licensing for details. */
#include "cmBinUtilsMacOSMachOLinker.h"
#include <sstream>
#include <string>
#include <vector>
#include <cm/memory>
#include "cmBinUtilsMacOSMachOOToolGetRuntimeDependenciesTool.h"
#include "cmRuntimeDependencyArchive.h"
#include "cmStringAlgorithms.h"
#include "cmSystemTools.h"
cmBinUtilsMacOSMachOLinker::cmBinUtilsMacOSMachOLinker(
cmRuntimeDependencyArchive* archive)
: cmBinUtilsLinker(archive)
{
}
bool cmBinUtilsMacOSMachOLinker::Prepare()
{
std::string tool = this->Archive->GetGetRuntimeDependenciesTool();
if (tool.empty()) {
tool = "otool";
}
if (tool == "otool") {
this->Tool =
cm::make_unique<cmBinUtilsMacOSMachOOToolGetRuntimeDependenciesTool>(
this->Archive);
} else {
std::ostringstream e;
e << "Invalid value for CMAKE_GET_RUNTIME_DEPENDENCIES_TOOL: " << tool;
this->SetError(e.str());
return false;
}
return true;
}
bool cmBinUtilsMacOSMachOLinker::ScanDependencies(
std::string const& file, cmStateEnums::TargetType type)
{
std::string executableFile;
if (type == cmStateEnums::EXECUTABLE) {
executableFile = file;
} else {
executableFile = this->Archive->GetBundleExecutable();
}
std::string executablePath;
if (!executableFile.empty()) {
executablePath = cmSystemTools::GetFilenamePath(executableFile);
}
return this->ScanDependencies(file, executablePath);
}
bool cmBinUtilsMacOSMachOLinker::ScanDependencies(
std::string const& file, std::string const& executablePath)
{
std::vector<std::string> libs;
std::vector<std::string> rpaths;
if (!this->Tool->GetFileInfo(file, libs, rpaths)) {
return false;
}
std::string loaderPath = cmSystemTools::GetFilenamePath(file);
return this->GetFileDependencies(libs, executablePath, loaderPath, rpaths);
}
bool cmBinUtilsMacOSMachOLinker::GetFileDependencies(
std::vector<std::string> const& names, std::string const& executablePath,
std::string const& loaderPath, std::vector<std::string> const& rpaths)
{
for (std::string const& name : names) {
if (!this->Archive->IsPreExcluded(name)) {
std::string path;
bool resolved;
if (!this->ResolveDependency(name, executablePath, loaderPath, rpaths,
path, resolved)) {
return false;
}
if (resolved) {
if (!this->Archive->IsPostExcluded(path)) {
auto filename = cmSystemTools::GetFilenameName(path);
bool unique;
this->Archive->AddResolvedPath(filename, path, unique);
if (unique && !this->ScanDependencies(path, executablePath)) {
return false;
}
}
} else {
this->Archive->AddUnresolvedPath(name);
}
}
}
return true;
}
bool cmBinUtilsMacOSMachOLinker::ResolveDependency(
std::string const& name, std::string const& executablePath,
std::string const& loaderPath, std::vector<std::string> const& rpaths,
std::string& path, bool& resolved)
{
resolved = false;
if (cmHasLiteralPrefix(name, "@rpath/")) {
if (!this->ResolveRPathDependency(name, executablePath, loaderPath, rpaths,
path, resolved)) {
return false;
}
} else if (cmHasLiteralPrefix(name, "@loader_path/")) {
if (!this->ResolveLoaderPathDependency(name, loaderPath, path, resolved)) {
return false;
}
} else if (cmHasLiteralPrefix(name, "@executable_path/")) {
if (!this->ResolveExecutablePathDependency(name, executablePath, path,
resolved)) {
return false;
}
} else {
resolved = true;
path = name;
}
if (resolved && !cmSystemTools::FileIsFullPath(path)) {
this->SetError("Resolved path is not absolute");
return false;
}
return true;
}
bool cmBinUtilsMacOSMachOLinker::ResolveExecutablePathDependency(
std::string const& name, std::string const& executablePath,
std::string& path, bool& resolved)
{
if (executablePath.empty()) {
resolved = false;
return true;
}
// 16 is == "@executable_path".length()
path = name;
path.replace(0, 16, executablePath);
if (!cmSystemTools::PathExists(path)) {
resolved = false;
return true;
}
resolved = true;
return true;
}
bool cmBinUtilsMacOSMachOLinker::ResolveLoaderPathDependency(
std::string const& name, std::string const& loaderPath, std::string& path,
bool& resolved)
{
if (loaderPath.empty()) {
resolved = false;
return true;
}
// 12 is "@loader_path".length();
path = name;
path.replace(0, 12, loaderPath);
if (!cmSystemTools::PathExists(path)) {
resolved = false;
return true;
}
resolved = true;
return true;
}
bool cmBinUtilsMacOSMachOLinker::ResolveRPathDependency(
std::string const& name, std::string const& executablePath,
std::string const& loaderPath, std::vector<std::string> const& rpaths,
std::string& path, bool& resolved)
{
for (std::string const& rpath : rpaths) {
std::string searchFile = name;
searchFile.replace(0, 6, rpath);
if (cmHasLiteralPrefix(searchFile, "@loader_path/")) {
if (!this->ResolveLoaderPathDependency(searchFile, loaderPath, path,
resolved)) {
return false;
}
if (resolved) {
return true;
}
} else if (cmHasLiteralPrefix(searchFile, "@executable_path/")) {
if (!this->ResolveExecutablePathDependency(searchFile, executablePath,
path, resolved)) {
return false;
}
if (resolved) {
return true;
}
} else if (cmSystemTools::PathExists(searchFile)) {
/*
* paraphrasing @ben.boeckel:
* if /b/libB.dylib is supposed to be used,
* /a/libbB.dylib will be found first if it exists. CMake tries to
* sort rpath directories to avoid this, but sometimes there is no
* right answer.
*
* I believe it is possible to resolve this using otools -l
* then checking the LC_LOAD_DYLIB command whose name is
* equal to the value of search_file, UNLESS the build
* specifically sets the RPath to paths that will match
* duplicate libs; at this point can we just point to
* user error, or is there a reason why the advantages
* to this scenario outweigh its disadvantages?
*
* Also priority seems to be the order as passed in when compiled
* so as long as this method's resolution guarantees priority
* in that manner further checking should not be necessary?
*/
path = searchFile;
resolved = true;
return true;
}
}
resolved = false;
return true;
}
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