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Add the INTERFACE_LIBRARY target type.

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This target type only contains INTERFACE_* properties, so it can be
used as a structural node. The target-specific commands enforce
that they may only be used with the INTERFACE keyword when used
with INTERFACE_LIBRARY targets. The old-style target properties
matching LINK_INTERFACE_LIBRARIES_<CONFIG> are always ignored for
this target type.

The name of the INTERFACE_LIBRARY must match a validity generator
expression. The validity is similar to that of an ALIAS target,
but with the additional restriction that it may not contain
double colons. Double colons will carry the meaning of IMPORTED
or ALIAS targets in CMake 2.8.13.

An ALIAS target may be created for an INTERFACE library.

At this point it can not be exported and does not appear in the
buildsystem and project files are not created for them. That may
be added as a feature in a later commit.

The generators need some changes to handle the INTERFACE_LIBRARY
targets returned by cmComputeLinkInterface::GetItems. The Ninja
generator does not use that API, so it doesn't require changes
related to that.
This commit is contained in:
Stephen Kelly
2012-11-02 15:47:40 +01:00
committed by Brad King
parent d4134352ab
commit fe732264e9
56 changed files with 528 additions and 49 deletions
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12
Source/cmLocalVisualStudio7Generator.cxx
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@@ -78,6 +78,10 @@ void cmLocalVisualStudio7Generator::AddHelperCommands()
static_cast<cmGlobalVisualStudio7Generator *>(this->GlobalGenerator);
for(cmTargets::iterator l = tgts.begin(); l != tgts.end(); l++)
{
if(l->second.GetType() == cmTarget::INTERFACE_LIBRARY)
{
continue;
}
const char* path = l->second.GetProperty("EXTERNAL_MSPROJECT");
if(path)
{
@@ -181,6 +185,10 @@ void cmLocalVisualStudio7Generator::WriteProjectFiles()
for(cmTargets::iterator l = tgts.begin();
l != tgts.end(); l++)
{
if(l->second.GetType() == cmTarget::INTERFACE_LIBRARY)
{
continue;
}
// INCLUDE_EXTERNAL_MSPROJECT command only affects the workspace
// so don't build a projectfile for it
if(!l->second.GetProperty("EXTERNAL_MSPROJECT"))
@@ -1258,6 +1266,7 @@ void cmLocalVisualStudio7Generator::OutputBuildTool(std::ostream& fout,
}
case cmTarget::UTILITY:
case cmTarget::GLOBAL_TARGET:
case cmTarget::INTERFACE_LIBRARY:
break;
}
}
@@ -1288,7 +1297,8 @@ cmLocalVisualStudio7GeneratorInternals
cmLocalGenerator::UNCHANGED);
fout << lg->ConvertToXMLOutputPath(rel.c_str()) << " ";
}
else
else if (!l->Target
|| l->Target->GetType() != cmTarget::INTERFACE_LIBRARY)
{
fout << l->Value << " ";
}