Initialize LINK_INTERFACE_LIBRARIES target property with a variable

Define variable CMAKE_LINK_INTERFACE_LIBRARIES to initialize the
value of this property when a target is created.  This allows authors
to write

  set(CMAKE_LINK_INTERFACE_LIBRARIES "")

to disable transitive linking to implementation dependencies of shared
libraries on platforms where it is possible.

2 files changed, 12 insertions, 1 deletions

diff --git a/Source/cmDocumentVariables.cxx b/Source/cmDocumentVariables.cxx
index f2b01f1..f4d4e7c 100644
--- a/Source/cmDocumentVariables.cxx
+++ b/Source/cmDocumentVariables.cxx
@@ -1219,7 +1219,14 @@ void cmDocumentVariables::DefineVariables(cmake* cm)
      "Therefore a specific build configuration must be chosen even "
      "if the generated build system supports multiple configurations.",false,
      "Variables that Control the Build");
-
+  cm->DefineProperty
+    ("CMAKE_LINK_INTERFACE_LIBRARIES", cmProperty::VARIABLE,
+     "Default value for LINK_INTERFACE_LIBRARIES of targets.",
+     "This variable is used to initialize the "
+     "LINK_INTERFACE_LIBRARIES property on all the targets. "
+     "See that target property for additional information.",
+     false,
+     "Variables that Control the Build");
 
 //   Variables defined when the a language is enabled These variables will
 // also be defined whenever CMake has loaded its support for compiling (LANG)
diff --git a/Source/cmTarget.cxx b/Source/cmTarget.cxx
index fb92016..14b73d1 100644
--- a/Source/cmTarget.cxx
+++ b/Source/cmTarget.cxx
@@ -619,6 +619,9 @@ void cmTarget::DefineProperties(cmake *cm)
      "If the list is empty then no transitive link dependencies will be "
      "incorporated when this target is linked into another target even if "
      "the default set is non-empty.  "
+     "This property is initialized by the value of the variable "
+     "CMAKE_LINK_INTERFACE_LIBRARIES if it is set when a target is "
+     "created.  "
      "This property is ignored for STATIC libraries.");
 
   cm->DefineProperty
@@ -1153,6 +1156,7 @@ void cmTarget::SetMakefile(cmMakefile* mf)
   this->SetPropertyDefault("Fortran_MODULE_DIRECTORY", 0);
   this->SetPropertyDefault("OSX_ARCHITECTURES", 0);
   this->SetPropertyDefault("AUTOMOC", 0);
+  this->SetPropertyDefault("LINK_INTERFACE_LIBRARIES", 0);
 
   // Collect the set of configuration types.
   std::vector<std::string> configNames;