CMake/Source/cmOrderLinkDirectories.cxx

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#include "cmOrderLinkDirectories.h"
#include "cmSystemTools.h"
#include "cmsys/RegularExpression.hxx"
#include <ctype.h>
//#define CM_ORDER_LINK_DIRECTORIES_DEBUG
//-------------------------------------------------------------------
cmOrderLinkDirectories::cmOrderLinkDirectories()
{
this->StartLinkType = LinkUnknown;
this->LinkTypeEnabled = false;
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this->Debug = false;
}
//-------------------------------------------------------------------
void
cmOrderLinkDirectories
::SetLinkTypeInformation(LinkType start_link_type,
const char* static_link_type_flag,
const char* shared_link_type_flag)
{
// We can support link type switching only if all needed flags are
// known.
this->StartLinkType = start_link_type;
if(static_link_type_flag && *static_link_type_flag &&
shared_link_type_flag && *shared_link_type_flag)
{
this->LinkTypeEnabled = true;
this->StaticLinkTypeFlag = static_link_type_flag;
this->SharedLinkTypeFlag = shared_link_type_flag;
}
else
{
this->LinkTypeEnabled = false;
this->StaticLinkTypeFlag = "";
this->SharedLinkTypeFlag = "";
}
}
//-------------------------------------------------------------------
void cmOrderLinkDirectories::SetCurrentLinkType(LinkType lt)
{
if(this->CurrentLinkType != lt)
{
this->CurrentLinkType = lt;
if(this->LinkTypeEnabled)
{
switch(this->CurrentLinkType)
{
case LinkStatic:
this->LinkItems.push_back(this->StaticLinkTypeFlag); break;
case LinkShared:
this->LinkItems.push_back(this->SharedLinkTypeFlag); break;
default: break;
}
}
}
}
//-------------------------------------------------------------------
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();
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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$");
// Compute a regex to match link extensions.
cmStdString libext = this->CreateExtensionRegex(this->LinkExtensions);
// Create regex to remove any library extension.
cmStdString reg("(.*)");
reg += libext;
this->RemoveLibraryExtension.compile(reg.c_str());
// Create a regex to match a library name. Match index 1 will be
// the prefix if it exists and empty otherwise. Match index 2 will
// be the library name. Match index 3 will be the library
// extension.
reg = "^(";
for(std::set<cmStdString>::iterator p = this->LinkPrefixes.begin();
p != this->LinkPrefixes.end(); ++p)
{
reg += *p;
reg += "|";
}
reg += ")";
reg += "([^/]*)";
// Create a regex to match any library name.
cmStdString reg_any = reg;
reg_any += libext;
#ifdef CM_ORDER_LINK_DIRECTORIES_DEBUG
fprintf(stderr, "any regex [%s]\n", reg_any.c_str());
#endif
this->ExtractAnyLibraryName.compile(reg_any.c_str());
// Create a regex to match static library names.
if(!this->StaticLinkExtensions.empty())
{
cmStdString reg_static = reg;
reg_static += this->CreateExtensionRegex(this->StaticLinkExtensions);
#ifdef CM_ORDER_LINK_DIRECTORIES_DEBUG
fprintf(stderr, "static regex [%s]\n", reg_static.c_str());
#endif
this->ExtractStaticLibraryName.compile(reg_static.c_str());
}
// Create a regex to match shared library names.
if(!this->SharedLinkExtensions.empty())
{
cmStdString reg_shared = reg;
reg_shared += this->CreateExtensionRegex(this->SharedLinkExtensions);
#ifdef CM_ORDER_LINK_DIRECTORIES_DEBUG
fprintf(stderr, "shared regex [%s]\n", reg_shared.c_str());
#endif
this->ExtractSharedLibraryName.compile(reg_shared.c_str());
}
}
//-------------------------------------------------------------------
std::string
cmOrderLinkDirectories::CreateExtensionRegex(
std::vector<cmStdString> const& exts)
{
// Build a list of extension choices.
cmStdString libext = "(";
const char* sep = "";
for(std::vector<cmStdString>::const_iterator i = exts.begin();
i != exts.end(); ++i)
{
// Separate this choice from the previous one.
libext += sep;
sep = "|";
// Store this extension choice with the "." escaped.
libext += "\\";
#if defined(_WIN32) && !defined(__CYGWIN__)
libext += this->NoCaseExpression(i->c_str());
#else
libext += *i;
#endif
}
// Finish the list.
libext += ").*";
return libext;
}
//-------------------------------------------------------------------
void cmOrderLinkDirectories::PrepareLinkTargets()
{
std::vector<cmStdString> originalLinkItems = this->LinkItems;
this->LinkItems.clear();
this->CurrentLinkType = this->StartLinkType;
for(std::vector<cmStdString>::iterator i = originalLinkItems.begin();
i != originalLinkItems.end(); ++i)
{
// Parse out the prefix, base, and suffix components of the
// library name. If the name matches that of a shared or static
// library then set the link type accordingly.
//
// Search for shared library names first because some platforms
// have shared libraries with names that match the static library
// pattern. For example cygwin and msys use the convention
// libfoo.dll.a for import libraries and libfoo.a for static
// libraries. On AIX a library with the name libfoo.a can be
// shared!
if(this->ExtractSharedLibraryName.find(*i))
{
#ifdef CM_ORDER_LINK_DIRECTORIES_DEBUG
fprintf(stderr, "shared regex matched [%s] [%s] [%s]\n",
this->ExtractSharedLibraryName.match(1).c_str(),
this->ExtractSharedLibraryName.match(2).c_str(),
this->ExtractSharedLibraryName.match(3).c_str());
#endif
this->SetCurrentLinkType(LinkShared);
this->LinkItems.push_back(this->ExtractSharedLibraryName.match(2));
}
else if(this->ExtractStaticLibraryName.find(*i))
{
#ifdef CM_ORDER_LINK_DIRECTORIES_DEBUG
fprintf(stderr, "static regex matched [%s] [%s] [%s]\n",
this->ExtractStaticLibraryName.match(1).c_str(),
this->ExtractStaticLibraryName.match(2).c_str(),
this->ExtractStaticLibraryName.match(3).c_str());
#endif
this->SetCurrentLinkType(LinkStatic);
this->LinkItems.push_back(this->ExtractStaticLibraryName.match(2));
}
else if(this->ExtractAnyLibraryName.find(*i))
{
#ifdef CM_ORDER_LINK_DIRECTORIES_DEBUG
fprintf(stderr, "any regex matched [%s] [%s] [%s]\n",
this->ExtractAnyLibraryName.match(1).c_str(),
this->ExtractAnyLibraryName.match(2).c_str(),
this->ExtractAnyLibraryName.match(3).c_str());
#endif
this->SetCurrentLinkType(this->StartLinkType);
this->LinkItems.push_back(this->ExtractAnyLibraryName.match(2));
}
else
{
this->SetCurrentLinkType(this->StartLinkType);
this->LinkItems.push_back(*i);
}
}
// Restore the original linking type so system runtime libraries are
// linked properly.
this->SetCurrentLinkType(this->StartLinkType);
}
//-------------------------------------------------------------------
bool cmOrderLinkDirectories::FindPathNotInDirectoryToAfterList(
cmStdString& path)
{
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for(std::vector<std::pair<cmStdString, std::vector<cmStdString> >
>::iterator i = this->DirectoryToAfterList.begin();
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i != this->DirectoryToAfterList.end(); ++i)
{
const cmStdString& p = i->first;
bool found = false;
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for(std::vector<std::pair<cmStdString, std::vector<cmStdString> >
>::iterator j = this->DirectoryToAfterList.begin();
j != this->DirectoryToAfterList.end() && !found; ++j)
{
if(j != i)
{
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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())
{
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for(std::vector<std::pair<cmStdString, std::vector<cmStdString> >
>::iterator i = this->DirectoryToAfterList.begin();
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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;
#ifdef CM_ORDER_LINK_DIRECTORIES_DEBUG
fprintf(stderr, "Raw link item [%s]\n", this->RawLinkItems[i].c_str());
#endif
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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
{
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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];
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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;
#ifdef CM_ORDER_LINK_DIRECTORIES_DEBUG
fprintf(stderr, "Storing item [%s]\n", file.c_str());
#endif
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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);
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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";
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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();
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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;
}