CMake/Source/cmOrderLinkDirectories.cxx

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#include "cmOrderLinkDirectories.h"
#include "cmSystemTools.h"
#include "cmsys/RegularExpression.hxx"
#include <ctype.h>
//-------------------------------------------------------------------
cmOrderLinkDirectories::cmOrderLinkDirectories()
{
m_Debug = false;
}
//-------------------------------------------------------------------
bool cmOrderLinkDirectories::LibraryInDirectory(const char* dir,
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const char* libIn)
{
cmStdString path = dir;
path += "/";
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path += libIn;
// first look for the library as given
if(cmSystemTools::FileExists(path.c_str()))
{
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(m_RemoveLibraryExtension.find(libIn))
{
cmStdString lib = m_RemoveLibraryExtension.match(1);
cmStdString ext = m_RemoveLibraryExtension.match(2);
for(std::vector<cmStdString>::iterator i = m_LinkExtensions.begin();
i != m_LinkExtensions.end(); ++i)
{
if(ext != *i)
{
path = dir;
path += "/";
path += lib + *i;
if(cmSystemTools::FileExists(path.c_str()))
{
return true;
}
}
}
}
return false;
}
//-------------------------------------------------------------------
void cmOrderLinkDirectories::FindLibrariesInSeachPaths()
{
for(std::set<cmStdString>::iterator dir = m_LinkPathSet.begin();
dir != m_LinkPathSet.end(); ++dir)
{
for(std::map<cmStdString, Library>::iterator lib
= m_FullPathLibraries.begin();
lib != m_FullPathLibraries.end(); ++lib)
{
if(lib->second.Path != *dir)
{
if(this->LibraryInDirectory(dir->c_str(), lib->second.File.c_str()))
{
m_LibraryToDirectories[lib->second.FullPath].push_back(*dir);
}
}
}
}
}
//-------------------------------------------------------------------
void cmOrderLinkDirectories::FindIndividualLibraryOrders()
{
for(std::vector<Library>::iterator lib = m_MultiDirectoryLibraries.begin();
lib != m_MultiDirectoryLibraries.end(); ++lib)
{
std::vector<cmStdString>& dirs = m_LibraryToDirectories[lib->FullPath];
m_DirectoryToAfterList[lib->Path] = dirs;
}
}
//-------------------------------------------------------------------
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()
{
cmStdString libext = "(";
bool first = true;
for(std::vector<cmStdString>::iterator i = m_LinkExtensions.begin();
i != m_LinkExtensions.end(); ++i)
{
if(!first)
{
libext += "|";
}
first = false;
libext += "\\";
#ifndef _WIN32
libext += *i;
#else
libext += this->NoCaseExpression(i->c_str());
#endif
}
libext += ").*";
cmStdString reg("(.*)");
reg += libext;
m_RemoveLibraryExtension.compile(reg.c_str());
reg = "^lib([^/]*)";
reg += libext;
m_ExtractBaseLibraryName.compile(reg.c_str());
reg = "([^/]*)";
reg += libext;
m_ExtractBaseLibraryNameNoPrefix.compile(reg.c_str());
}
//-------------------------------------------------------------------
void cmOrderLinkDirectories::PrepareLinkTargets()
{
for(std::vector<cmStdString>::iterator i = m_LinkItems.begin();
i != m_LinkItems.end(); ++i)
{
// separate the library name from libfoo.a or foo.a
if(m_ExtractBaseLibraryName.find(*i))
{
*i = m_ExtractBaseLibraryName.match(1);
}
else if(m_ExtractBaseLibraryNameNoPrefix.find(*i))
{
*i = m_ExtractBaseLibraryNameNoPrefix.match(1);
}
}
}
//-------------------------------------------------------------------
bool cmOrderLinkDirectories::FindPathNotInDirectoryToAfterList(
cmStdString& path)
{
for(std::map<cmStdString, std::vector<cmStdString> >::iterator i
= m_DirectoryToAfterList.begin();
i != m_DirectoryToAfterList.end(); ++i)
{
const cmStdString& p = i->first;
bool found = false;
for(std::map<cmStdString, std::vector<cmStdString> >::iterator j
= m_DirectoryToAfterList.begin(); j != m_DirectoryToAfterList.end()
&& !found; ++j)
{
if(j != i)
{
found = (std::find(j->second.begin(), j->second.end(), p) != j->second.end());
}
}
if(!found)
{
path = p;
m_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
// m_DirectoryToAfterList once it is found
while(this->FindPathNotInDirectoryToAfterList(path))
{
orderedPaths.push_back(path);
}
// at this point if there are still paths in m_DirectoryToAfterList
// then there is a cycle and we are stuck
if(m_DirectoryToAfterList.size())
{
for(std::map<cmStdString, std::vector<cmStdString> >::iterator i
= m_DirectoryToAfterList.begin();
i != m_DirectoryToAfterList.end(); ++i)
{
m_ImposibleDirectories.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 cmTarget& target,
cmTarget::LinkLibraryType
linktype,
const char* targetLibrary)
{
// collect the search paths from the target into paths set
const std::vector<std::string>& searchPaths = target.GetLinkDirectories();
std::vector<cmStdString> empty;
for(std::vector<std::string>::const_iterator p = searchPaths.begin();
p != searchPaths.end(); ++p)
{
m_DirectoryToAfterList[*p] = empty;
m_LinkPathSet.insert(*p);
}
// collect the link items from the target and put it into libs
const cmTarget::LinkLibraries& tlibs = target.GetLinkLibraries();
std::vector<cmStdString> libs;
for(cmTarget::LinkLibraries::const_iterator lib = tlibs.begin();
lib != tlibs.end(); ++lib)
{
// skip zero size library entries, this may happen
// if a variable expands to nothing.
if (lib->first.size() == 0)
{
continue;
}
// Don't link the library against itself!
if(targetLibrary && (lib->first == targetLibrary) &&
target.GetType() != cmTarget::EXECUTABLE)
{
continue;
}
// use the correct lib for the current configuration
if (lib->second == cmTarget::DEBUG && linktype != cmTarget::DEBUG)
{
continue;
}
if (lib->second == cmTarget::OPTIMIZED &&
linktype != cmTarget::OPTIMIZED)
{
continue;
}
m_RawLinkItems.push_back(lib->first);
}
}
//-------------------------------------------------------------------
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;
for(unsigned int i=0; i < m_RawLinkItems.size(); ++i)
{
if(cmSystemTools::FileIsFullPath(m_RawLinkItems[i].c_str()))
{
cmSystemTools::SplitProgramPath(m_RawLinkItems[i].c_str(),
dir, file);
m_DirectoryToAfterList[dir] = empty;
m_LinkPathSet.insert(dir);
aLib.FullPath = m_RawLinkItems[i];
aLib.File = file;
aLib.Path = dir;
m_FullPathLibraries[aLib.FullPath] = aLib;
m_LinkItems.push_back(file);
}
else
{
m_LinkItems.push_back(m_RawLinkItems[i]);
}
}
this->FindLibrariesInSeachPaths();
for(std::map<cmStdString, std::vector<cmStdString> >::iterator lib =
m_LibraryToDirectories.begin(); lib!= m_LibraryToDirectories.end();
++lib)
{
if(lib->second.size() > 0)
{
m_MultiDirectoryLibraries.push_back(m_FullPathLibraries[lib->first]);
}
else
{
m_SingleDirectoryLibraries.push_back(m_FullPathLibraries[lib->first]);
}
}
this->FindIndividualLibraryOrders();
m_SortedSearchPaths.clear();
if(m_Debug)
{
this->PrintMap("m_LibraryToDirectories", m_LibraryToDirectories);
this->PrintMap("m_DirectoryToAfterList", m_DirectoryToAfterList);
}
this->OrderPaths(m_SortedSearchPaths);
// now turn libfoo.a into foo and foo.a into foo
// This will prepare the link items for -litem
this->PrepareLinkTargets();
if(m_ImposibleDirectories.size())
{
cmSystemTools::Message(this->GetWarnings().c_str());
return false;
}
return true;
}
std::string cmOrderLinkDirectories::GetWarnings()
{
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 involvied are:\n";
for(std::set<cmStdString>::iterator i = m_ImposibleDirectories.begin();
i != m_ImposibleDirectories.end(); ++i)
{
warning += "Directory: ";
warning += *i;
warning += " contains:\n";
std::map<cmStdString, std::vector<cmStdString> >::iterator j;
for(j = m_LibraryToDirectories.begin();
j != m_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::GetFullPathLibraries(std::vector<cmStdString>&
libs)
{
for(std::map<cmStdString, Library>::iterator i = m_FullPathLibraries.begin();
i != m_FullPathLibraries.end(); ++i)
{
libs.push_back(i->first);
}
}