346 lines
10 KiB
C++
346 lines
10 KiB
C++
#include "cmOrderLinkDirectories.h"
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#include "cmSystemTools.h"
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#include "cmsys/RegularExpression.hxx"
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//-------------------------------------------------------------------
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bool cmOrderLinkDirectories::LibraryInDirectory(const char* dir,
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const char* libIn)
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{
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cmStdString path = dir;
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path += "/";
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path += libIn;
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// first look for the library as given
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if(cmSystemTools::FileExists(path.c_str()))
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{
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return true;
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}
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// next remove the extension (.a, .so ) and look for the library
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// under a different name as the linker can do either
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if(m_RemoveLibraryExtension.find(libIn))
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{
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cmStdString lib = m_RemoveLibraryExtension.match(1);
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cmStdString ext = m_RemoveLibraryExtension.match(2);
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for(std::vector<cmStdString>::iterator i = m_LinkExtensions.begin();
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i != m_LinkExtensions.end(); ++i)
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{
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if(ext != *i)
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{
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path = dir;
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path += "/";
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path += lib + *i;
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if(cmSystemTools::FileExists(path.c_str()))
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{
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return true;
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}
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}
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}
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}
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return false;
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}
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//-------------------------------------------------------------------
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void cmOrderLinkDirectories::FindLibrariesInSeachPaths()
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{
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for(std::set<cmStdString>::iterator dir = m_LinkPathSet.begin();
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dir != m_LinkPathSet.end(); ++dir)
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{
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for(std::map<cmStdString, Library>::iterator lib
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= m_FullPathLibraries.begin();
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lib != m_FullPathLibraries.end(); ++lib)
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{
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if(lib->second.Path != *dir)
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{
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if(this->LibraryInDirectory(dir->c_str(), lib->second.File.c_str()))
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{
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m_LibraryToDirectories[lib->second.FullPath].push_back(*dir);
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}
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}
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}
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}
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}
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//-------------------------------------------------------------------
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void cmOrderLinkDirectories::FindIndividualLibraryOrders()
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{
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for(std::vector<Library>::iterator lib = m_MultiDirectoryLibraries.begin();
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lib != m_MultiDirectoryLibraries.end(); ++lib)
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{
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std::vector<cmStdString>& dirs = m_LibraryToDirectories[lib->FullPath];
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m_DirectoryToAfterList[lib->Path] = dirs;
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}
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}
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//-------------------------------------------------------------------
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void cmOrderLinkDirectories::CreateRegularExpressions()
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{
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cmStdString libext = "(";
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bool first = true;
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for(std::vector<cmStdString>::iterator i = m_LinkExtensions.begin();
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i != m_LinkExtensions.end(); ++i)
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{
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if(!first)
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{
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libext += "|";
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}
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first = false;
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libext += "\\";
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libext += *i;
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}
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libext += ").*";
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cmStdString reg("(.*)");
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reg += libext;
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m_RemoveLibraryExtension.compile(reg.c_str());
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reg = "^lib([^/]*)";
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reg += libext;
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m_ExtractBaseLibraryName.compile(reg.c_str());
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reg = "([^/]*)";
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reg += libext;
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m_ExtractBaseLibraryNameNoPrefix.compile(reg.c_str());
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}
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//-------------------------------------------------------------------
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void cmOrderLinkDirectories::PrepareLinkTargets()
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{
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for(std::vector<cmStdString>::iterator i = m_LinkItems.begin();
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i != m_LinkItems.end(); ++i)
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{
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// separate the library name from libfoo.a or foo.a
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if(m_ExtractBaseLibraryName.find(*i))
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{
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*i = m_ExtractBaseLibraryName.match(1);
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}
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else if(m_ExtractBaseLibraryNameNoPrefix.find(*i))
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{
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*i = m_ExtractBaseLibraryNameNoPrefix.match(1);
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}
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}
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}
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//-------------------------------------------------------------------
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bool cmOrderLinkDirectories::FindPathNotInDirectoryToAfterList(
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cmStdString& path)
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{
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for(std::map<cmStdString, std::vector<cmStdString> >::iterator i
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= m_DirectoryToAfterList.begin();
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i != m_DirectoryToAfterList.end(); ++i)
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{
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const cmStdString& p = i->first;
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bool found = false;
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for(std::map<cmStdString, std::vector<cmStdString> >::iterator j
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= m_DirectoryToAfterList.begin(); j != m_DirectoryToAfterList.end()
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&& !found; ++j)
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{
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if(j != i)
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{
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found = (std::find(j->second.begin(), j->second.end(), p) != j->second.end());
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}
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}
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if(!found)
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{
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path = p;
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m_DirectoryToAfterList.erase(i);
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return true;
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}
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}
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return false;
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}
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//-------------------------------------------------------------------
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void cmOrderLinkDirectories::OrderPaths(std::vector<cmStdString>&
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orderedPaths)
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{
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cmStdString path;
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// This is a topological sort implementation
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// One at a time find paths that are not in any other paths after list
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// and put them into the orderedPaths vector in that order
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// FindPathNotInDirectoryToAfterList removes the path from the
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// m_DirectoryToAfterList once it is found
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while(this->FindPathNotInDirectoryToAfterList(path))
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{
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orderedPaths.push_back(path);
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}
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// at this point if there are still paths in m_DirectoryToAfterList
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// then there is a cycle and we are stuck
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if(m_DirectoryToAfterList.size())
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{
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for(std::map<cmStdString, std::vector<cmStdString> >::iterator i
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= m_DirectoryToAfterList.begin();
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i != m_DirectoryToAfterList.end(); ++i)
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{
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m_ImposibleDirectories.insert(i->first);
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}
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// if it failed, then fall back to original order
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orderedPaths.clear();
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for(std::set<cmStdString>::iterator dir = m_LinkPathSet.begin();
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dir != m_LinkPathSet.end(); ++dir)
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{
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orderedPaths.push_back(*dir);
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}
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}
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}
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//-------------------------------------------------------------------
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void cmOrderLinkDirectories::SetLinkInformation(const cmTarget& target,
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cmTarget::LinkLibraryType
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linktype,
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const char* targetLibrary)
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{
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// collect the search paths from the target into paths set
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const std::vector<std::string>& searchPaths = target.GetLinkDirectories();
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std::vector<cmStdString> empty;
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for(std::vector<std::string>::const_iterator p = searchPaths.begin();
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p != searchPaths.end(); ++p)
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{
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m_DirectoryToAfterList[*p] = empty;
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m_LinkPathSet.insert(*p);
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}
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// collect the link items from the target and put it into libs
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const cmTarget::LinkLibraries& tlibs = target.GetLinkLibraries();
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std::vector<cmStdString> libs;
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for(cmTarget::LinkLibraries::const_iterator lib = tlibs.begin();
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lib != tlibs.end(); ++lib)
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{
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// skip zero size library entries, this may happen
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// if a variable expands to nothing.
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if (lib->first.size() == 0)
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{
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continue;
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}
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// Don't link the library against itself!
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if(targetLibrary && (lib->first == targetLibrary))
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{
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continue;
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}
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// use the correct lib for the current configuration
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if (lib->second == cmTarget::DEBUG && linktype != cmTarget::DEBUG)
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{
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continue;
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}
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if (lib->second == cmTarget::OPTIMIZED &&
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linktype != cmTarget::OPTIMIZED)
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{
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continue;
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}
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m_RawLinkItems.push_back(lib->first);
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}
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}
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//-------------------------------------------------------------------
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bool cmOrderLinkDirectories::DetermineLibraryPathOrder()
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{
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// set up all the regular expressions
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this->CreateRegularExpressions();
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std::vector<cmStdString> finalOrderPaths;
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// find all libs that are full paths
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Library aLib;
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cmStdString dir;
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cmStdString file;
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for(unsigned int i=0; i < m_RawLinkItems.size(); ++i)
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{
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if(cmSystemTools::FileIsFullPath(m_RawLinkItems[i].c_str()))
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{
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cmSystemTools::SplitProgramPath(m_RawLinkItems[i].c_str(),
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dir, file);
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m_LinkPathSet.insert(dir);
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aLib.FullPath = m_RawLinkItems[i];
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aLib.File = file;
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aLib.Path = dir;
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m_FullPathLibraries[aLib.FullPath] = aLib;
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m_LinkItems.push_back(file);
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}
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else
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{
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m_LinkItems.push_back(m_RawLinkItems[i]);
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}
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}
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this->FindLibrariesInSeachPaths();
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for(std::map<cmStdString, std::vector<cmStdString> >::iterator lib =
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m_LibraryToDirectories.begin(); lib!= m_LibraryToDirectories.end();
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++lib)
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{
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if(lib->second.size() > 0)
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{
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m_MultiDirectoryLibraries.push_back(m_FullPathLibraries[lib->first]);
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}
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else
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{
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m_SingleDirectoryLibraries.push_back(m_FullPathLibraries[lib->first]);
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}
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}
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this->FindIndividualLibraryOrders();
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m_SortedSearchPaths.clear();
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this->OrderPaths(m_SortedSearchPaths);
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// now turn libfoo.a into foo and foo.a into foo
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// This will prepare the link items for -litem
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this->PrepareLinkTargets();
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if(m_ImposibleDirectories.size())
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{
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cmSystemTools::Message(this->GetWarnings().c_str());
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return false;
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}
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return true;
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}
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std::string cmOrderLinkDirectories::GetWarnings()
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{
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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 involvied are:\n";
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for(std::set<cmStdString>::iterator i = m_ImposibleDirectories.begin();
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i != m_ImposibleDirectories.end(); ++i)
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{
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warning += "Directory: ";
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warning += *i;
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warning += " contains:\n";
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std::map<cmStdString, std::vector<cmStdString> >::iterator j;
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for(j = m_LibraryToDirectories.begin();
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j != m_LibraryToDirectories.end(); ++j)
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{
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if(std::find(j->second.begin(), j->second.end(), *i)
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!= j->second.end())
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{
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warning += "Library: ";
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warning += j->first;
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warning += "\n";
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}
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}
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warning += "\n";
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}
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warning += "\n";
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return warning;
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}
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//-------------------------------------------------------------------
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void
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cmOrderLinkDirectories::PrintMap(const char* name,
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std::map<cmStdString, std::vector<cmStdString> >& m)
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{
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std::cerr << name << "\n";
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for(std::map<cmStdString, std::vector<cmStdString> >::iterator i =
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m.begin(); i != m.end();
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++i)
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{
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std::cerr << i->first << ": ";
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for(std::vector<cmStdString>::iterator l = i->second.begin();
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l != i->second.end(); ++l)
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{
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std::cerr << *l << " ";
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}
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std::cerr << "\n";
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}
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}
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void cmOrderLinkDirectories::GetFullPathLibraries(std::vector<cmStdString>&
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libs)
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{
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for(std::map<cmStdString, Library>::iterator i = m_FullPathLibraries.begin();
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i != m_FullPathLibraries.end(); ++i)
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{
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libs.push_back(i->first);
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}
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}
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