CMake/Source/cmOrderLinkDirectories.cxx

344 lines
10 KiB
C++

#include "cmOrderLinkDirectories.h"
#include "cmSystemTools.h"
#include "cmsys/RegularExpression.hxx"
//-------------------------------------------------------------------
bool cmOrderLinkDirectories::LibraryInDirectory(const char* dir,
const char* libIn)
{
cmStdString path = dir;
path += "/";
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
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(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;
}
}
//-------------------------------------------------------------------
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 += "\\";
libext += *i;
}
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::CanBeBefore(const cmStdString& d1,
const cmStdString& d2)
{
if(m_DirectoryToAfterList.count(d2) == 0)
{
return true;
}
std::vector<cmStdString>& d2dirs = m_DirectoryToAfterList[d2];
// is d1 in the d2's list of directories that d2 must be before
// if so, then d1 can not come before d2
for(std::vector<cmStdString>::iterator i = d2dirs.begin();
i != d2dirs.end(); ++i)
{
if(*i == d1)
{
return false;
}
}
return true;
}
// This is a stl function object used to sort
// the vector of library paths. It returns true
// if left directory can be before right directory (no swap).
// It also checks for the impossible case of two libraries and
// two directories that have both libraries.
struct cmOrderLinkDirectoriesCompare
: public std::binary_function <cmStdString, cmStdString, bool>
{
cmOrderLinkDirectoriesCompare()
{
This = 0;
}
bool operator()(
const cmStdString& left,
const cmStdString& right
) const
{
bool ret = This->CanBeBefore(left, right);
if(!ret)
{
// check for the case when both libraries have to come
// before each other
if(!This->CanBeBefore(right, left))
{
This->AddImpossible(right, left);
}
}
return ret;
}
cmOrderLinkDirectories* This;
};
//-------------------------------------------------------------------
void cmOrderLinkDirectories::AddImpossible(const cmStdString& d1,
const cmStdString& d2)
{
m_ImposibleDirectories.insert(d1);
m_ImposibleDirectories.insert(d2);
}
//-------------------------------------------------------------------
void cmOrderLinkDirectories::OrderPaths(std::vector<cmStdString>&
orderedPaths)
{
cmOrderLinkDirectoriesCompare comp;
comp.This = this;
std::sort(orderedPaths.begin(), orderedPaths.end(), comp);
}
//-------------------------------------------------------------------
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();
for(std::vector<std::string>::const_iterator p = searchPaths.begin();
p != searchPaths.end(); ++p)
{
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))
{
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;
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_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();
for(std::set<cmStdString>::iterator i = m_LinkPathSet.begin();
i != m_LinkPathSet.end(); ++i)
{
m_SortedSearchPaths.push_back(*i);
}
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())
{
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 ";
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";
return warning;
}
//-------------------------------------------------------------------
void
cmOrderLinkDirectories::PrintMap(const char* name,
std::map<cmStdString, std::vector<cmStdString> >& m)
{
std::cerr << name << "\n";
for(std::map<cmStdString, std::vector<cmStdString> >::iterator i =
m.begin(); i != m.end();
++i)
{
std::cerr << i->first << ": ";
for(std::vector<cmStdString>::iterator l = i->second.begin();
l != i->second.end(); ++l)
{
std::cerr << *l << " ";
}
std::cerr << "\n";
}
}