CMake/Source/cmFindLibraryCommand.cxx

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/*============================================================================
CMake - Cross Platform Makefile Generator
Copyright 2000-2009 Kitware, Inc., Insight Software Consortium
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Distributed under the OSI-approved BSD License (the "License");
see accompanying file Copyright.txt for details.
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This software is distributed WITHOUT ANY WARRANTY; without even the
implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the License for more information.
============================================================================*/
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#include "cmFindLibraryCommand.h"
#include <cmsys/Directory.hxx>
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cmFindLibraryCommand::cmFindLibraryCommand()
{
this->EnvironmentPath = "LIB";
this->NamesPerDirAllowed = true;
}
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// cmFindLibraryCommand
bool cmFindLibraryCommand::InitialPass(std::vector<std::string> const& argsIn,
cmExecutionStatus&)
{
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this->VariableDocumentation = "Path to a library.";
this->CMakePathName = "LIBRARY";
if (!this->ParseArguments(argsIn)) {
return false;
}
if (this->AlreadyInCache) {
// If the user specifies the entry on the command line without a
// type we should add the type and docstring but keep the original
// value.
if (this->AlreadyInCacheWithoutMetaInfo) {
this->Makefile->AddCacheDefinition(this->VariableName, "",
this->VariableDocumentation.c_str(),
cmState::FILEPATH);
}
return true;
}
if (const char* abi_name =
this->Makefile->GetDefinition("CMAKE_INTERNAL_PLATFORM_ABI")) {
std::string abi = abi_name;
if (abi.find("ELF N32") != abi.npos) {
// Convert lib to lib32.
this->AddArchitecturePaths("32");
}
}
if (this->Makefile->GetState()->GetGlobalPropertyAsBool(
"FIND_LIBRARY_USE_LIB64_PATHS")) {
// add special 64 bit paths if this is a 64 bit compile.
if (this->Makefile->PlatformIs64Bit()) {
this->AddArchitecturePaths("64");
}
}
std::string library = this->FindLibrary();
if (library != "") {
// Save the value in the cache
this->Makefile->AddCacheDefinition(this->VariableName, library.c_str(),
this->VariableDocumentation.c_str(),
cmState::FILEPATH);
return true;
}
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std::string notfound = this->VariableName + "-NOTFOUND";
this->Makefile->AddCacheDefinition(this->VariableName, notfound.c_str(),
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this->VariableDocumentation.c_str(),
cmState::FILEPATH);
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return true;
}
void cmFindLibraryCommand::AddArchitecturePaths(const char* suffix)
{
std::vector<std::string> original;
original.swap(this->SearchPaths);
for (std::vector<std::string>::const_iterator i = original.begin();
i != original.end(); ++i) {
this->AddArchitecturePath(*i, 0, suffix);
}
}
void cmFindLibraryCommand::AddArchitecturePath(
std::string const& dir, std::string::size_type start_pos, const char* suffix,
bool fresh)
{
std::string::size_type pos = dir.find("lib/", start_pos);
if (pos != std::string::npos) {
std::string cur_dir = dir.substr(0, pos + 3);
// Follow "lib<suffix>".
std::string next_dir = cur_dir + suffix;
if (cmSystemTools::FileIsDirectory(next_dir)) {
next_dir += dir.substr(pos + 3);
std::string::size_type next_pos = pos + 3 + strlen(suffix) + 1;
this->AddArchitecturePath(next_dir, next_pos, suffix);
}
// Follow "lib".
if (cmSystemTools::FileIsDirectory(cur_dir)) {
this->AddArchitecturePath(dir, pos + 3 + 1, suffix, false);
}
}
if (fresh) {
// Check for <dir><suffix>/.
std::string cur_dir = dir + suffix + "/";
if (cmSystemTools::FileIsDirectory(cur_dir)) {
this->SearchPaths.push_back(cur_dir);
}
// Now add the original unchanged path
if (cmSystemTools::FileIsDirectory(dir)) {
this->SearchPaths.push_back(dir);
}
}
}
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std::string cmFindLibraryCommand::FindLibrary()
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{
std::string library;
if (this->SearchFrameworkFirst || this->SearchFrameworkOnly) {
library = this->FindFrameworkLibrary();
}
if (library.empty() && !this->SearchFrameworkOnly) {
library = this->FindNormalLibrary();
}
if (library.empty() && this->SearchFrameworkLast) {
library = this->FindFrameworkLibrary();
}
return library;
}
struct cmFindLibraryHelper
{
cmFindLibraryHelper(cmMakefile* mf);
// Context information.
cmMakefile* Makefile;
cmGlobalGenerator* GG;
// List of valid prefixes and suffixes.
std::vector<std::string> Prefixes;
std::vector<std::string> Suffixes;
std::string PrefixRegexStr;
std::string SuffixRegexStr;
// Keep track of the best library file found so far.
typedef std::vector<std::string>::size_type size_type;
std::string BestPath;
// Support for OpenBSD shared library naming: lib<name>.so.<major>.<minor>
bool OpenBSD;
// Current names under consideration.
struct Name
{
bool TryRaw;
std::string Raw;
cmsys::RegularExpression Regex;
Name()
: TryRaw(false)
{
}
};
std::vector<Name> Names;
// Current full path under consideration.
std::string TestPath;
void RegexFromLiteral(std::string& out, std::string const& in);
void RegexFromList(std::string& out, std::vector<std::string> const& in);
size_type GetPrefixIndex(std::string const& prefix)
{
return std::find(this->Prefixes.begin(), this->Prefixes.end(), prefix) -
this->Prefixes.begin();
}
size_type GetSuffixIndex(std::string const& suffix)
{
return std::find(this->Suffixes.begin(), this->Suffixes.end(), suffix) -
this->Suffixes.begin();
}
bool HasValidSuffix(std::string const& name);
void AddName(std::string const& name);
void SetName(std::string const& name);
bool CheckDirectory(std::string const& path);
bool CheckDirectoryForName(std::string const& path, Name& name);
};
cmFindLibraryHelper::cmFindLibraryHelper(cmMakefile* mf)
: Makefile(mf)
{
this->GG = this->Makefile->GetGlobalGenerator();
// Collect the list of library name prefixes/suffixes to try.
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const char* prefixes_list =
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this->Makefile->GetRequiredDefinition("CMAKE_FIND_LIBRARY_PREFIXES");
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const char* suffixes_list =
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this->Makefile->GetRequiredDefinition("CMAKE_FIND_LIBRARY_SUFFIXES");
cmSystemTools::ExpandListArgument(prefixes_list, this->Prefixes, true);
cmSystemTools::ExpandListArgument(suffixes_list, this->Suffixes, true);
this->RegexFromList(this->PrefixRegexStr, this->Prefixes);
this->RegexFromList(this->SuffixRegexStr, this->Suffixes);
// Check whether to use OpenBSD-style library version comparisons.
this->OpenBSD = this->Makefile->GetState()->GetGlobalPropertyAsBool(
"FIND_LIBRARY_USE_OPENBSD_VERSIONING");
}
void cmFindLibraryHelper::RegexFromLiteral(std::string& out,
std::string const& in)
{
for (std::string::const_iterator ci = in.begin(); ci != in.end(); ++ci) {
char ch = *ci;
if (ch == '[' || ch == ']' || ch == '(' || ch == ')' || ch == '\\' ||
ch == '.' || ch == '*' || ch == '+' || ch == '?' || ch == '-' ||
ch == '^' || ch == '$') {
out += "\\";
}
#if defined(_WIN32) || defined(__APPLE__)
out += tolower(ch);
#else
out += ch;
#endif
}
}
void cmFindLibraryHelper::RegexFromList(std::string& out,
std::vector<std::string> const& in)
{
// Surround the list in parens so the '|' does not apply to anything
// else and the result can be checked after matching.
out += "(";
const char* sep = "";
for (std::vector<std::string>::const_iterator si = in.begin();
si != in.end(); ++si) {
// Separate from previous item.
out += sep;
sep = "|";
// Append this item.
this->RegexFromLiteral(out, *si);
}
out += ")";
}
bool cmFindLibraryHelper::HasValidSuffix(std::string const& name)
{
for (std::vector<std::string>::const_iterator si = this->Suffixes.begin();
si != this->Suffixes.end(); ++si) {
std::string suffix = *si;
if (name.length() <= suffix.length()) {
continue;
}
// Check if the given name ends in a valid library suffix.
if (name.substr(name.size() - suffix.length()) == suffix) {
return true;
}
// Check if a valid library suffix is somewhere in the name,
// this may happen e.g. for versioned shared libraries: libfoo.so.2
suffix += ".";
if (name.find(suffix) != name.npos) {
return true;
}
}
return false;
}
void cmFindLibraryHelper::AddName(std::string const& name)
{
Name entry;
// Consider checking the raw name too.
entry.TryRaw = this->HasValidSuffix(name);
entry.Raw = name;
// Build a regular expression to match library names.
std::string regex = "^";
regex += this->PrefixRegexStr;
this->RegexFromLiteral(regex, name);
regex += this->SuffixRegexStr;
if (this->OpenBSD) {
regex += "(\\.[0-9]+\\.[0-9]+)?";
}
regex += "$";
entry.Regex.compile(regex.c_str());
this->Names.push_back(entry);
}
void cmFindLibraryHelper::SetName(std::string const& name)
{
this->Names.clear();
this->AddName(name);
}
bool cmFindLibraryHelper::CheckDirectory(std::string const& path)
{
for (std::vector<Name>::iterator i = this->Names.begin();
i != this->Names.end(); ++i) {
if (this->CheckDirectoryForName(path, *i)) {
return true;
}
}
return false;
}
bool cmFindLibraryHelper::CheckDirectoryForName(std::string const& path,
Name& name)
{
// If the original library name provided by the user matches one of
// the suffixes, try it first. This allows users to search
// specifically for a static library on some platforms (on MS tools
// one cannot tell just from the library name whether it is a static
// library or an import library).
if (name.TryRaw) {
this->TestPath = path;
this->TestPath += name.Raw;
if (cmSystemTools::FileExists(this->TestPath.c_str(), true)) {
this->BestPath = cmSystemTools::CollapseFullPath(this->TestPath);
cmSystemTools::ConvertToUnixSlashes(this->BestPath);
return true;
}
}
// No library file has yet been found.
size_type bestPrefix = this->Prefixes.size();
size_type bestSuffix = this->Suffixes.size();
unsigned int bestMajor = 0;
unsigned int bestMinor = 0;
// Search for a file matching the library name regex.
std::string dir = path;
cmSystemTools::ConvertToUnixSlashes(dir);
std::set<std::string> const& files = this->GG->GetDirectoryContent(dir);
for (std::set<std::string>::const_iterator fi = files.begin();
fi != files.end(); ++fi) {
std::string const& origName = *fi;
#if defined(_WIN32) || defined(__APPLE__)
std::string testName = cmSystemTools::LowerCase(origName);
#else
std::string const& testName = origName;
#endif
if (name.Regex.find(testName)) {
this->TestPath = path;
this->TestPath += origName;
if (!cmSystemTools::FileIsDirectory(this->TestPath)) {
// This is a matching file. Check if it is better than the
// best name found so far. Earlier prefixes are preferred,
// followed by earlier suffixes. For OpenBSD, shared library
// version extensions are compared.
size_type prefix = this->GetPrefixIndex(name.Regex.match(1));
size_type suffix = this->GetSuffixIndex(name.Regex.match(2));
unsigned int major = 0;
unsigned int minor = 0;
if (this->OpenBSD) {
sscanf(name.Regex.match(3).c_str(), ".%u.%u", &major, &minor);
}
if (this->BestPath.empty() || prefix < bestPrefix ||
(prefix == bestPrefix && suffix < bestSuffix) ||
(prefix == bestPrefix && suffix == bestSuffix &&
(major > bestMajor ||
(major == bestMajor && minor > bestMinor)))) {
this->BestPath = this->TestPath;
bestPrefix = prefix;
bestSuffix = suffix;
bestMajor = major;
bestMinor = minor;
}
}
}
}
// Use the best candidate found in this directory, if any.
return !this->BestPath.empty();
}
std::string cmFindLibraryCommand::FindNormalLibrary()
{
if (this->NamesPerDir) {
return this->FindNormalLibraryNamesPerDir();
} else {
return this->FindNormalLibraryDirsPerName();
}
}
std::string cmFindLibraryCommand::FindNormalLibraryNamesPerDir()
{
// Search for all names in each directory.
cmFindLibraryHelper helper(this->Makefile);
for (std::vector<std::string>::const_iterator ni = this->Names.begin();
ni != this->Names.end(); ++ni) {
helper.AddName(*ni);
}
// Search every directory.
for (std::vector<std::string>::const_iterator p = this->SearchPaths.begin();
p != this->SearchPaths.end(); ++p) {
if (helper.CheckDirectory(*p)) {
return helper.BestPath;
}
}
// Couldn't find the library.
return "";
}
std::string cmFindLibraryCommand::FindNormalLibraryDirsPerName()
{
// Search the entire path for each name.
cmFindLibraryHelper helper(this->Makefile);
for (std::vector<std::string>::const_iterator ni = this->Names.begin();
ni != this->Names.end(); ++ni) {
// Switch to searching for this name.
helper.SetName(*ni);
// Search every directory.
for (std::vector<std::string>::const_iterator p =
this->SearchPaths.begin();
p != this->SearchPaths.end(); ++p) {
if (helper.CheckDirectory(*p)) {
return helper.BestPath;
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}
}
}
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// Couldn't find the library.
return "";
}
std::string cmFindLibraryCommand::FindFrameworkLibrary()
{
if (this->NamesPerDir) {
return this->FindFrameworkLibraryNamesPerDir();
} else {
return this->FindFrameworkLibraryDirsPerName();
}
}
std::string cmFindLibraryCommand::FindFrameworkLibraryNamesPerDir()
{
std::string fwPath;
// Search for all names in each search path.
for (std::vector<std::string>::const_iterator di = this->SearchPaths.begin();
di != this->SearchPaths.end(); ++di) {
for (std::vector<std::string>::const_iterator ni = this->Names.begin();
ni != this->Names.end(); ++ni) {
fwPath = *di;
fwPath += *ni;
fwPath += ".framework";
if (cmSystemTools::FileIsDirectory(fwPath)) {
return cmSystemTools::CollapseFullPath(fwPath);
}
}
}
// No framework found.
return "";
}
std::string cmFindLibraryCommand::FindFrameworkLibraryDirsPerName()
{
std::string fwPath;
// Search for each name in all search paths.
for (std::vector<std::string>::const_iterator ni = this->Names.begin();
ni != this->Names.end(); ++ni) {
for (std::vector<std::string>::const_iterator di =
this->SearchPaths.begin();
di != this->SearchPaths.end(); ++di) {
fwPath = *di;
fwPath += *ni;
fwPath += ".framework";
if (cmSystemTools::FileIsDirectory(fwPath)) {
return cmSystemTools::CollapseFullPath(fwPath);
}
}
}
// No framework found.
return "";
}