Define LINK_DEPENDS target property (#11406)

Custom Makefile link rules may need to depend on linker scripts.  Define
this property to allow user-specified link-time dependencies.

2 files changed, 19 insertions, 0 deletions

diff --git a/Source/cmMakefileTargetGenerator.cxx b/Source/cmMakefileTargetGenerator.cxx
index 0c150df..9153f3a 100644
--- a/Source/cmMakefileTargetGenerator.cxx
+++ b/Source/cmMakefileTargetGenerator.cxx
@@ -1534,6 +1534,13 @@ void cmMakefileTargetGenerator
     {
     depends.push_back(*obj);
     }
+
+  // Add user-specified dependencies.
+  if(const char* linkDepends =
+     this->Target->GetProperty("LINK_DEPENDS"))
+    {
+    cmSystemTools::ExpandListArgument(linkDepends, depends);
+    }
 }
 
 //----------------------------------------------------------------------------
diff --git a/Source/cmTarget.cxx b/Source/cmTarget.cxx
index 5380257..ca61b1f 100644
--- a/Source/cmTarget.cxx
+++ b/Source/cmTarget.cxx
@@ -532,6 +532,18 @@ void cmTarget::DefineProperties(cmake *cm)
      "configurations explicitly.");
 
   cm->DefineProperty
+    ("LINK_DEPENDS", cmProperty::TARGET,
+     "Additional files on which a target binary depends for linking.",
+     "Specifies a semicolon-separated list of full-paths to files on which "
+     "the link rule for this target depends.  "
+     "The target binary will be linked if any of the named files is newer "
+     "than it."
+     "\n"
+     "This property is ignored by non-Makefile generators.  "
+     "It is intended to specify dependencies on \"linker scripts\" for "
+     "custom Makefile link rules.");
+
+  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 "