Optionally skip link dependencies on shared library files

Add target property LINK_DEPENDS_NO_SHARED and initialization variable
CMAKE_LINK_DEPENDS_NO_SHARED to enable this behavior.

Suggested-by: Leif Walsh <leif.walsh@gmail.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/Source/cmTarget.cxx b/Source/cmTarget.cxx
index 423b350..9cfcb63 100644
--- a/Source/cmTarget.cxx
+++ b/Source/cmTarget.cxx
@@ -651,6 +651,22 @@ void cmTarget::DefineProperties(cmake *cm)
      "custom Makefile link rules.");
 
   cm->DefineProperty
+    ("LINK_DEPENDS_NO_SHARED", cmProperty::TARGET,
+     "Do not depend on linked shared library files.",
+     "Set this property to true to tell CMake generators not to add "
+     "file-level dependencies on the shared library files linked by "
+     "this target.  "
+     "Modification to the shared libraries will not be sufficient to "
+     "re-link this target.  "
+     "Logical target-level dependencies will not be affected so the "
+     "linked shared libraries will still be brought up to date before "
+     "this target is built."
+     "\n"
+     "This property is initialized by the value of the variable "
+     "CMAKE_LINK_DEPENDS_NO_SHARED if it is set when a target is "
+     "created.");
+
+  cm->DefineProperty
     ("LINK_INTERFACE_LIBRARIES", cmProperty::TARGET,
      "List public interface libraries for a shared library or executable.",
      "By default linking to a shared library target transitively "
@@ -1314,6 +1330,7 @@ void cmTarget::SetMakefile(cmMakefile* mf)
   this->SetPropertyDefault("OSX_ARCHITECTURES", 0);
   this->SetPropertyDefault("AUTOMOC", 0);
   this->SetPropertyDefault("AUTOMOC_MOC_OPTIONS", 0);
+  this->SetPropertyDefault("LINK_DEPENDS_NO_SHARED", 0);
   this->SetPropertyDefault("LINK_INTERFACE_LIBRARIES", 0);
   this->SetPropertyDefault("WIN32_EXECUTABLE", 0);
   this->SetPropertyDefault("MACOSX_BUNDLE", 0);