CMake/Source/cmOrderLinkDirectories.cxx

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#include "cmOrderLinkDirectories.h"
#include "cmSystemTools.h"
#include "cmsys/RegularExpression.hxx"
#include <ctype.h>
//-------------------------------------------------------------------
cmOrderLinkDirectories::cmOrderLinkDirectories()
{
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this->Debug = false;
}
//-------------------------------------------------------------------
bool cmOrderLinkDirectories::LibraryInDirectory(const char* desiredLib,
const char* dir,
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const char* libIn)
{
// first look for the library as given
if(this->LibraryMayConflict(desiredLib, dir, libIn))
{
return true;
}
// next remove the extension (.a, .so ) and look for the library
// under a different name as the linker can do either
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if(this->RemoveLibraryExtension.find(libIn))
{
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cmStdString lib = this->RemoveLibraryExtension.match(1);
cmStdString ext = this->RemoveLibraryExtension.match(2);
for(std::vector<cmStdString>::iterator i = this->LinkExtensions.begin();
i != this->LinkExtensions.end(); ++i)
{
if(ext != *i)
{
std::string fname = lib;
lib += *i;
if(this->LibraryMayConflict(desiredLib, dir, fname.c_str()))
{
return true;
}
}
}
}
return false;
}
//-------------------------------------------------------------------
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void cmOrderLinkDirectories::FindLibrariesInSearchPaths()
{
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for(std::set<cmStdString>::iterator dir = this->LinkPathSet.begin();
dir != this->LinkPathSet.end(); ++dir)
{
for(std::map<cmStdString, Library>::iterator lib
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= this->FullPathLibraries.begin();
lib != this->FullPathLibraries.end(); ++lib)
{
if(lib->second.Path != *dir)
{
if(this->LibraryInDirectory(lib->second.FullPath.c_str(),
dir->c_str(), lib->second.File.c_str()))
{
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this->LibraryToDirectories[lib->second.FullPath].push_back(*dir);
}
}
}
}
}
//-------------------------------------------------------------------
void cmOrderLinkDirectories::FindIndividualLibraryOrders()
{
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for(std::vector<Library>::iterator lib = this->MultiDirectoryLibraries.begin();
lib != this->MultiDirectoryLibraries.end(); ++lib)
{
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std::vector<cmStdString>& dirs = this->LibraryToDirectories[lib->FullPath];
std::vector<std::pair<cmStdString, std::vector<cmStdString> > >::iterator i;
for(i = this->DirectoryToAfterList.begin(); i != this->DirectoryToAfterList.end();
++i)
{
if(i->first == lib->Path)
{
break;
}
}
if(i == this->DirectoryToAfterList.end())
{
std::cerr << "ERROR: should not happen\n";
}
else
{
for(std::vector<cmStdString>::iterator d = dirs.begin();
d != dirs.end(); ++d)
{
i->second.push_back(*d);
}
}
}
}
//-------------------------------------------------------------------
std::string cmOrderLinkDirectories::NoCaseExpression(const char* str)
{
std::string ret;
const char* s = str;
while(*s)
{
if(*s == '.')
{
ret += *s;
}
else
{
ret += "[";
ret += tolower(*s);
ret += toupper(*s);
ret += "]";
}
s++;
}
return ret;
}
//-------------------------------------------------------------------
void cmOrderLinkDirectories::CreateRegularExpressions()
{
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this->SplitFramework.compile("(.*)/(.*)\\.framework$");
cmStdString libext = "(";
bool first = true;
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for(std::vector<cmStdString>::iterator i = this->LinkExtensions.begin();
i != this->LinkExtensions.end(); ++i)
{
if(!first)
{
libext += "|";
}
first = false;
libext += "\\";
#if defined(_WIN32) && !defined(__CYGWIN__)
libext += this->NoCaseExpression(i->c_str());
#else
libext += *i;
#endif
}
libext += ").*";
cmStdString reg("(.*)");
reg += libext;
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this->RemoveLibraryExtension.compile(reg.c_str());
reg = "";
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if(this->LinkPrefix.size())
{
reg = "^";
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reg += this->LinkPrefix;
}
reg += "([^/]*)";
reg += libext;
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this->ExtractBaseLibraryName.compile(reg.c_str());
reg = "([^/]*)";
reg += libext;
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this->ExtractBaseLibraryNameNoPrefix.compile(reg.c_str());
}
//-------------------------------------------------------------------
void cmOrderLinkDirectories::PrepareLinkTargets()
{
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for(std::vector<cmStdString>::iterator i = this->LinkItems.begin();
i != this->LinkItems.end(); ++i)
{
// separate the library name from libfoo.a or foo.a
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if(this->ExtractBaseLibraryName.find(*i))
{
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*i = this->ExtractBaseLibraryName.match(1);
}
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else if(this->ExtractBaseLibraryNameNoPrefix.find(*i))
{
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*i = this->ExtractBaseLibraryNameNoPrefix.match(1);
}
}
}
//-------------------------------------------------------------------
bool cmOrderLinkDirectories::FindPathNotInDirectoryToAfterList(
cmStdString& path)
{
for(std::vector<std::pair<cmStdString, std::vector<cmStdString> > >::iterator i
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= this->DirectoryToAfterList.begin();
i != this->DirectoryToAfterList.end(); ++i)
{
const cmStdString& p = i->first;
bool found = false;
for(std::vector<std::pair<cmStdString, std::vector<cmStdString> > >::iterator j
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= this->DirectoryToAfterList.begin(); j != this->DirectoryToAfterList.end()
&& !found; ++j)
{
if(j != i)
{
found = (std::find(j->second.begin(), j->second.end(), p) != j->second.end());
}
}
if(!found)
{
path = p;
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this->DirectoryToAfterList.erase(i);
return true;
}
}
path = "";
return false;
}
//-------------------------------------------------------------------
void cmOrderLinkDirectories::OrderPaths(std::vector<cmStdString>&
orderedPaths)
{
cmStdString path;
// This is a topological sort implementation
// One at a time find paths that are not in any other paths after list
// and put them into the orderedPaths vector in that order
// FindPathNotInDirectoryToAfterList removes the path from the
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// this->DirectoryToAfterList once it is found
while(this->FindPathNotInDirectoryToAfterList(path))
{
orderedPaths.push_back(path);
}
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// at this point if there are still paths in this->DirectoryToAfterList
// then there is a cycle and we are stuck
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if(this->DirectoryToAfterList.size())
{
for(std::vector<std::pair<cmStdString, std::vector<cmStdString> > >::iterator i
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= this->DirectoryToAfterList.begin();
i != this->DirectoryToAfterList.end(); ++i)
{
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this->ImpossibleDirectories.insert(i->first);
// still put it in the path list in the order we find them
orderedPaths.push_back(i->first);
}
}
}
//-------------------------------------------------------------------
void cmOrderLinkDirectories::SetLinkInformation(
const char* targetName,
const std::vector<std::string>& linkLibraries,
const std::vector<std::string>& linkDirectories,
const cmTargetManifest& manifest,
const char* configSubdir
)
{
// Save the target name.
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this->TargetName = targetName;
// Save the subdirectory used for linking in this configuration.
this->ConfigSubdir = configSubdir? configSubdir : "";
// Merge the link directory search path given into our path set.
std::vector<cmStdString> empty;
for(std::vector<std::string>::const_iterator p = linkDirectories.begin();
p != linkDirectories.end(); ++p)
{
std::string dir = *p;
#ifdef _WIN32
// Avoid case problems for windows paths.
if(dir.size() > 2 && dir[1] == ':')
{
if(dir[0] >= 'A' && dir[0] <= 'Z')
{
dir[0] += 'a' - 'A';
}
}
dir = cmSystemTools::GetActualCaseForPath(dir.c_str());
#endif
if(this->DirectoryToAfterListEmitted.insert(dir).second)
{
std::pair<cmStdString, std::vector<cmStdString> > dp;
dp.first = dir;
this->DirectoryToAfterList.push_back(dp);
this->LinkPathSet.insert(dir);
}
}
// Append the link library list into our raw list.
for(std::vector<std::string>::const_iterator l = linkLibraries.begin();
l != linkLibraries.end(); ++l)
{
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this->RawLinkItems.push_back(*l);
}
// Construct a set of files that will exist after building.
for(cmTargetManifest::const_iterator i = manifest.begin();
i != manifest.end(); ++i)
{
for(cmTargetSet::const_iterator j = i->second.begin();
j != i->second.end(); ++j)
{
this->ManifestFiles.insert(*j);
}
}
}
//-------------------------------------------------------------------
bool cmOrderLinkDirectories::DetermineLibraryPathOrder()
{
// set up all the regular expressions
this->CreateRegularExpressions();
std::vector<cmStdString> finalOrderPaths;
// find all libs that are full paths
Library aLib;
cmStdString dir;
cmStdString file;
std::vector<cmStdString> empty;
// do not add a -F for the system frameworks
this->EmittedFrameworkPaths.insert("/System/Library/Frameworks");
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for(unsigned int i=0; i < this->RawLinkItems.size(); ++i)
{
bool framework = false;
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if(cmSystemTools::FileIsFullPath(this->RawLinkItems[i].c_str()))
{
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if(cmSystemTools::FileIsDirectory(this->RawLinkItems[i].c_str()))
{
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if(cmSystemTools::IsPathToFramework(this->RawLinkItems[i].c_str()))
{
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this->SplitFramework.find(this->RawLinkItems[i]);
cmStdString path = this->SplitFramework.match(1);
// Add the -F path if we have not yet done so
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if(this->EmittedFrameworkPaths.insert(path).second)
{
std::string fpath = "-F";
fpath += cmSystemTools::ConvertToOutputPath(path.c_str());
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this->LinkItems.push_back(fpath);
}
// now add the -framework option
std::string frame = "-framework ";
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frame += this->SplitFramework.match(2);
this->LinkItems.push_back(frame);
framework = true;
}
else
{
std::string message = "Warning: Ignoring path found in link libraries for target: ";
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message += this->TargetName;
message += ", path is: ";
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message += this->RawLinkItems[i];
message += ". Expected a library name or a full path to a library name.";
cmSystemTools::Message(message.c_str());
continue;
}
}
if(!framework)
{
dir = cmSystemTools::GetFilenamePath(this->RawLinkItems[i]);
file = cmSystemTools::GetFilenameName(this->RawLinkItems[i]);
#ifdef _WIN32
// Avoid case problems for windows paths.
if(dir.size() > 2 && dir[1] == ':')
{
if(dir[0] >= 'A' && dir[0] <= 'Z')
{
dir[0] += 'a' - 'A';
}
}
dir = cmSystemTools::GetActualCaseForPath(dir.c_str());
#endif
if(this->DirectoryToAfterListEmitted.insert(dir).second)
{
std::pair<cmStdString, std::vector<cmStdString> > dp;
dp.first = dir;
this->DirectoryToAfterList.push_back(dp);
}
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this->LinkPathSet.insert(dir);
aLib.FullPath = this->RawLinkItems[i];
aLib.File = file;
aLib.Path = dir;
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this->FullPathLibraries[aLib.FullPath] = aLib;
this->LinkItems.push_back(file);
}
}
else
{
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this->LinkItems.push_back(this->RawLinkItems[i]);
}
}
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this->FindLibrariesInSearchPaths();
for(std::map<cmStdString, std::vector<cmStdString> >::iterator lib =
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this->LibraryToDirectories.begin(); lib!= this->LibraryToDirectories.end();
++lib)
{
if(lib->second.size() > 0)
{
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this->MultiDirectoryLibraries.push_back(this->FullPathLibraries[lib->first]);
}
else
{
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this->SingleDirectoryLibraries.push_back(this->FullPathLibraries[lib->first]);
}
}
this->FindIndividualLibraryOrders();
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this->SortedSearchPaths.clear();
if(this->Debug)
{
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this->PrintMap("this->LibraryToDirectories", this->LibraryToDirectories);
this->PrintVector("this->DirectoryToAfterList", this->DirectoryToAfterList);
}
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this->OrderPaths(this->SortedSearchPaths);
// now turn libfoo.a into foo and foo.a into foo
// This will prepare the link items for -litem
this->PrepareLinkTargets();
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if(this->ImpossibleDirectories.size())
{
cmSystemTools::Message(this->GetWarnings().c_str());
return false;
}
return true;
}
std::string cmOrderLinkDirectories::GetWarnings()
{
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std::string warning = "It is impossible to order the linker search path in such a way that libraries specified as full paths will be picked by the linker.\nDirectories and libraries involved are:\n";
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for(std::set<cmStdString>::iterator i = this->ImpossibleDirectories.begin();
i != this->ImpossibleDirectories.end(); ++i)
{
warning += "Directory: ";
warning += *i;
warning += " contains:\n";
std::map<cmStdString, std::vector<cmStdString> >::iterator j;
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for(j = this->LibraryToDirectories.begin();
j != this->LibraryToDirectories.end(); ++j)
{
if(std::find(j->second.begin(), j->second.end(), *i)
!= j->second.end())
{
warning += "Library: ";
warning += j->first;
warning += "\n";
}
}
warning += "\n";
}
warning += "\n";
return warning;
}
//-------------------------------------------------------------------
void
cmOrderLinkDirectories::PrintMap(const char* name,
std::map<cmStdString, std::vector<cmStdString> >& m)
{
std::cout << name << "\n";
for(std::map<cmStdString, std::vector<cmStdString> >::iterator i =
m.begin(); i != m.end();
++i)
{
std::cout << i->first << ": ";
for(std::vector<cmStdString>::iterator l = i->second.begin();
l != i->second.end(); ++l)
{
std::cout << *l << " ";
}
std::cout << "\n";
}
}
//-------------------------------------------------------------------
void
cmOrderLinkDirectories::PrintVector(const char* name,
std::vector<std::pair<cmStdString,
std::vector<cmStdString> > >& m)
{
std::cout << name << "\n";
for(std::vector<std::pair<cmStdString, std::vector<cmStdString> > >::iterator i =
m.begin(); i != m.end();
++i)
{
std::cout << i->first << ": ";
for(std::vector<cmStdString>::iterator l = i->second.begin();
l != i->second.end(); ++l)
{
std::cout << *l << " ";
}
std::cout << "\n";
}
}
void cmOrderLinkDirectories::GetFullPathLibraries(std::vector<cmStdString>&
libs)
{
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for(std::map<cmStdString, Library>::iterator i = this->FullPathLibraries.begin();
i != this->FullPathLibraries.end(); ++i)
{
libs.push_back(i->first);
}
}
//----------------------------------------------------------------------------
bool cmOrderLinkDirectories::LibraryMayConflict(const char* desiredLib,
const char* dir,
const char* fname)
{
// We need to check whether the given file may be picked up by the
// linker. This will occur if it exists as given or may be built
// using the name given.
bool found = false;
std::string path = dir;
path += "/";
path += fname;
if(this->ManifestFiles.find(path) != this->ManifestFiles.end())
{
found = true;
}
else if(cmSystemTools::FileExists(path.c_str()))
{
found = true;
}
// When linking with a multi-configuration build tool the
// per-configuration subdirectory is added to each link path. Check
// this subdirectory too.
if(!found && !this->ConfigSubdir.empty())
{
path = dir;
path += "/";
path += this->ConfigSubdir;
path += "/";
path += fname;
if(this->ManifestFiles.find(path) != this->ManifestFiles.end())
{
found = true;
}
else if(cmSystemTools::FileExists(path.c_str()))
{
found = true;
}
}
// A library conflicts if it is found and is not a symlink back to
// the desired library.
if(found)
{
return !cmSystemTools::SameFile(desiredLib, path.c_str());
}
return false;
}