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CMake/Source/cmFindLibraryCommand.cxx
Brad King 3ba1713f6f find_library: Use lib->lib64 conversion in CXX-only projects (#12247,#12248) 
Do not require the C language to be enabled to do lib->lib64 conversion.
The check was originally added by commit a5825cd1 (check in new find
stuff, 2006-03-02) to ensure that CMAKE_SIZEOF_VOID_P is set.  Since
commit 3fdf1411 (FIND_LIBRARY should not require CMAKE_SIZEOF_VOID_P,
2008-02-11) the code following the check does not fail when the variable
is not set, so just remove the original check.  This allows conversion
for any language that is enabled so long as the address size is known.

Reported-by: Christoph Höger <choeger@cs.tu-berlin.de>
2011-06-15 08:32:22 -04:00

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/*============================================================================
CMake - Cross Platform Makefile Generator
Copyright 2000-2009 Kitware, Inc., Insight Software Consortium
Distributed under the OSI-approved BSD License (the "License");
see accompanying file Copyright.txt for details.
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.
============================================================================*/
#include "cmFindLibraryCommand.h"
#include "cmCacheManager.h"
#include <cmsys/Directory.hxx>
#include <cmsys/stl/algorithm>
cmFindLibraryCommand::cmFindLibraryCommand()
{
this->EnvironmentPath = "LIB";
}
//----------------------------------------------------------------------------
void cmFindLibraryCommand::GenerateDocumentation()
{
this->cmFindBase::GenerateDocumentation();
cmSystemTools::ReplaceString(this->GenericDocumentation,
"FIND_XXX", "find_library");
cmSystemTools::ReplaceString(this->GenericDocumentation,
"CMAKE_XXX_PATH", "CMAKE_LIBRARY_PATH");
cmSystemTools::ReplaceString(this->GenericDocumentation,
"CMAKE_XXX_MAC_PATH",
"CMAKE_FRAMEWORK_PATH");
cmSystemTools::ReplaceString(this->GenericDocumentation,
"CMAKE_SYSTEM_XXX_MAC_PATH",
"CMAKE_SYSTEM_FRAMEWORK_PATH");
cmSystemTools::ReplaceString(this->GenericDocumentation,
"XXX_SYSTEM", "LIB");
cmSystemTools::ReplaceString(this->GenericDocumentation,
"CMAKE_SYSTEM_XXX_PATH",
"CMAKE_SYSTEM_LIBRARY_PATH");
cmSystemTools::ReplaceString(this->GenericDocumentation,
"SEARCH_XXX_DESC", "library");
cmSystemTools::ReplaceString(this->GenericDocumentation,
"SEARCH_XXX", "library");
cmSystemTools::ReplaceString(this->GenericDocumentation,
"XXX_SUBDIR", "lib");
cmSystemTools::ReplaceString(
this->GenericDocumentation,
"XXX_EXTRA_PREFIX_ENTRY",
" <prefix>/lib/<arch> if CMAKE_LIBRARY_ARCHITECTURE is set, and\n");
cmSystemTools::ReplaceString(this->GenericDocumentation,
"CMAKE_FIND_ROOT_PATH_MODE_XXX",
"CMAKE_FIND_ROOT_PATH_MODE_LIBRARY");
this->GenericDocumentation +=
"\n"
"If the library found is a framework, then VAR will be set to "
"the full path to the framework <fullPath>/A.framework. "
"When a full path to a framework is used as a library, "
"CMake will use a -framework A, and a -F<fullPath> to "
"link the framework to the target. ";
}
// cmFindLibraryCommand
bool cmFindLibraryCommand
::InitialPass(std::vector<std::string> const& argsIn, cmExecutionStatus &)
{
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.c_str(), "",
this->VariableDocumentation.c_str(),
cmCacheManager::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->GetCMakeInstance()
->GetPropertyAsBool("FIND_LIBRARY_USE_LIB64_PATHS"))
{
// add special 64 bit paths if this is a 64 bit compile.
this->AddLib64Paths();
}
std::string library = this->FindLibrary();
if(library != "")
{
// Save the value in the cache
this->Makefile->AddCacheDefinition(this->VariableName.c_str(),
library.c_str(),
this->VariableDocumentation.c_str(),
cmCacheManager::FILEPATH);
return true;
}
std::string notfound = this->VariableName + "-NOTFOUND";
this->Makefile->AddCacheDefinition(this->VariableName.c_str(),
notfound.c_str(),
this->VariableDocumentation.c_str(),
cmCacheManager::FILEPATH);
return true;
}
//----------------------------------------------------------------------------
void cmFindLibraryCommand::AddArchitecturePaths(const char* suffix)
{
std::vector<std::string> newPaths;
bool found = false;
std::string subpath = "lib";
subpath += suffix;
subpath += "/";
for(std::vector<std::string>::iterator i = this->SearchPaths.begin();
i != this->SearchPaths.end(); ++i)
{
// Try replacing lib/ with lib<suffix>/
std::string s = *i;
cmSystemTools::ReplaceString(s, "lib/", subpath.c_str());
if((s != *i) && cmSystemTools::FileIsDirectory(s.c_str()))
{
found = true;
newPaths.push_back(s);
}
// Now look for lib<suffix>
s = *i;
s += suffix;
if(cmSystemTools::FileIsDirectory(s.c_str()))
{
found = true;
newPaths.push_back(s);
}
// now add the original unchanged path
if(cmSystemTools::FileIsDirectory(i->c_str()))
{
newPaths.push_back(*i);
}
}
// If any new paths were found replace the original set.
if(found)
{
this->SearchPaths = newPaths;
}
}
void cmFindLibraryCommand::AddLib64Paths()
{
std::string voidsize =
this->Makefile->GetSafeDefinition("CMAKE_SIZEOF_VOID_P");
int size = atoi(voidsize.c_str());
if(size != 8)
{
return;
}
std::vector<std::string> path64;
bool found64 = false;
for(std::vector<std::string>::iterator i = this->SearchPaths.begin();
i != this->SearchPaths.end(); ++i)
{
std::string s = *i;
std::string s2 = *i;
cmSystemTools::ReplaceString(s, "lib/", "lib64/");
// try to replace lib with lib64 and see if it is there,
// then prepend it to the path
// Note that all paths have trailing slashes.
if((s != *i) && cmSystemTools::FileIsDirectory(s.c_str()))
{
path64.push_back(s);
found64 = true;
}
// now just add a 64 to the path name and if it is there,
// add it to the path
s2 += "64/";
if(cmSystemTools::FileIsDirectory(s2.c_str()))
{
found64 = true;
path64.push_back(s2);
}
// now add the original unchanged path
if(cmSystemTools::FileIsDirectory(i->c_str()))
{
path64.push_back(*i);
}
}
// now replace the SearchPaths with the 64 bit converted path
// if any 64 bit paths were discovered
if(found64)
{
this->SearchPaths = path64;
}
}
//----------------------------------------------------------------------------
std::string cmFindLibraryCommand::FindLibrary()
{
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;
size_type BestPrefix;
size_type BestSuffix;
// Support for OpenBSD shared library naming: lib<name>.so.<major>.<minor>
bool OpenBSD;
unsigned int BestMajor;
unsigned int BestMinor;
// Current name under consideration.
cmsys::RegularExpression NameRegex;
bool TryRawName;
std::string RawName;
// 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 cmsys_stl::find(this->Prefixes.begin(), this->Prefixes.end(),
prefix) - this->Prefixes.begin();
}
size_type GetSuffixIndex(std::string const& suffix)
{
return cmsys_stl::find(this->Suffixes.begin(), this->Suffixes.end(),
suffix) - this->Suffixes.begin();
}
bool HasValidSuffix(std::string const& name);
void SetName(std::string const& name);
bool CheckDirectory(std::string const& path);
};
//----------------------------------------------------------------------------
cmFindLibraryHelper::cmFindLibraryHelper(cmMakefile* mf):
Makefile(mf)
{
this->GG = this->Makefile->GetLocalGenerator()->GetGlobalGenerator();
// Collect the list of library name prefixes/suffixes to try.
const char* prefixes_list =
this->Makefile->GetRequiredDefinition("CMAKE_FIND_LIBRARY_PREFIXES");
const char* suffixes_list =
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->GetCMakeInstance()
->GetPropertyAsBool("FIND_LIBRARY_USE_OPENBSD_VERSIONING");
this->TryRawName = false;
// No library file has yet been found.
this->BestPrefix = this->Prefixes.size();
this->BestSuffix = this->Suffixes.size();
this->BestMajor = 0;
this->BestMinor = 0;
}
//----------------------------------------------------------------------------
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 == '$')
{
out += "\\";
}
#if defined(_WIN32) || defined(__APPLE__)
out += tolower(ch);
#else
out += ch;
#endif
}
}
//----------------------------------------------------------------------------
void cmFindLibraryHelper::RegexFromList(std::string& out,
std::vector<std::string> const& in)
{
// Surround the list in parens so the '|' does not apply to anything
// else and the result can be checked after matching.
out += "(";
const char* sep = "";
for(std::vector<std::string>::const_iterator si = in.begin();
si != in.end(); ++si)
{
// Separate from previous item.
out += sep;
sep = "|";
// Append this item.
this->RegexFromLiteral(out, *si);
}
out += ")";
}
//----------------------------------------------------------------------------
bool cmFindLibraryHelper::HasValidSuffix(std::string const& name)
{
// Check if the given name ends in a valid library suffix.
for(std::vector<std::string>::const_iterator si = this->Suffixes.begin();
si != this->Suffixes.end(); ++si)
{
std::string const& suffix = *si;
if(name.length() > suffix.length() &&
name.substr(name.size()-suffix.length()) == suffix)
{
return true;
}
}
return false;
}
//----------------------------------------------------------------------------
void cmFindLibraryHelper::SetName(std::string const& name)
{
// Consider checking the raw name too.
this->TryRawName = this->HasValidSuffix(name);
this->RawName = name;
// Build a regular expression to match library names.
std::string regex = "^";
regex += this->PrefixRegexStr;
this->RegexFromLiteral(regex, name);
regex += this->SuffixRegexStr;
if(this->OpenBSD)
{
regex += "(\\.[0-9]+\\.[0-9]+)?";
}
regex += "$";
this->NameRegex.compile(regex.c_str());
}
//----------------------------------------------------------------------------
bool cmFindLibraryHelper::CheckDirectory(std::string const& path)
{
// 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(this->TryRawName)
{
this->TestPath = path;
this->TestPath += this->RawName;
if(cmSystemTools::FileExists(this->TestPath.c_str(), true))
{
this->BestPath =
cmSystemTools::CollapseFullPath(this->TestPath.c_str());
cmSystemTools::ConvertToUnixSlashes(this->BestPath);
return true;
}
}
// Search for a file matching the library name regex.
std::string dir = path;
cmSystemTools::ConvertToUnixSlashes(dir);
std::set<cmStdString> const& files = this->GG->GetDirectoryContent(dir);
for(std::set<cmStdString>::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(this->NameRegex.find(testName))
{
this->TestPath = path;
this->TestPath += origName;
if(!cmSystemTools::FileIsDirectory(this->TestPath.c_str()))
{
// 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(this->NameRegex.match(1));
size_type suffix = this->GetSuffixIndex(this->NameRegex.match(2));
unsigned int major = 0;
unsigned int minor = 0;
if(this->OpenBSD)
{
sscanf(this->NameRegex.match(3).c_str(), ".%u.%u", &major, &minor);
}
if(this->BestPath.empty() || prefix < this->BestPrefix ||
(prefix == this->BestPrefix && suffix < this->BestSuffix) ||
(prefix == this->BestPrefix && suffix == this->BestSuffix &&
(major > this->BestMajor ||
(major == this->BestMajor && minor > this->BestMinor))))
{
this->BestPath = this->TestPath;
this->BestPrefix = prefix;
this->BestSuffix = suffix;
this->BestMajor = major;
this->BestMinor = minor;
}
}
}
}
// Use the best candidate found in this directory, if any.
return !this->BestPath.empty();
}
//----------------------------------------------------------------------------
std::string cmFindLibraryCommand::FindNormalLibrary()
{
// 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.
std::string const& name = *ni;
helper.SetName(name);
// 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::FindFrameworkLibrary()
{
// Search for a framework of each name in the entire search path.
for(std::vector<std::string>::const_iterator ni = this->Names.begin();
ni != this->Names.end() ; ++ni)
{
// Search the paths for a framework with this name.
std::string fwName = *ni;
fwName += ".framework";
std::string fwPath = cmSystemTools::FindDirectory(fwName.c_str(),
this->SearchPaths,
true);
if(!fwPath.empty())
{
return fwPath;
}
}
// No framework found.
return "";
}
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