1 files changed, 29 insertions, 2 deletions

diff --git a/Source/cmInstallTargetGenerator.cxx b/Source/cmInstallTargetGenerator.cxx
index d1d431653f..61e5979b73 100644
--- a/Source/cmInstallTargetGenerator.cxx
+++ b/Source/cmInstallTargetGenerator.cxx
@@ -19,6 +19,7 @@
 #include "cmStateTypes.h"
 #include "cmSystemTools.h"
 #include "cmTarget.h"
+#include "cmake.h"
 
 cmInstallTargetGenerator::cmInstallTargetGenerator(
   std::string targetName, const char* dest, bool implib,
@@ -211,8 +212,34 @@ void cmInstallTargetGenerator::GenerateScriptForConfig(
       // An import library looks like a static library.
       type = cmInstallType_STATIC_LIBRARY;
     } else if (this->Target->IsFrameworkOnApple()) {
-      // There is a bug in cmInstallCommand if this fails.
-      assert(this->NamelinkMode == NamelinkModeNone);
+      // FIXME: In principle we should be able to
+      //   assert(this->NamelinkMode == NamelinkModeNone);
+      // but since the current install() command implementation checks
+      // the FRAMEWORK property immediately instead of delaying until
+      // generate time, it is possible for project code to set the
+      // property after calling install().  In such a case, the install()
+      // command will use the LIBRARY code path and create two install
+      // generators, one for the namelink component (NamelinkModeOnly)
+      // and one for the primary artifact component (NamelinkModeSkip).
+      // Historically this was not diagnosed and resulted in silent
+      // installation of a framework to the LIBRARY destination.
+      // Retain that behavior and warn about the case.
+      switch (this->NamelinkMode) {
+        case NamelinkModeNone:
+          // Normal case.
+          break;
+        case NamelinkModeOnly:
+          // Assume the NamelinkModeSkip instance will warn and install.
+          return;
+        case NamelinkModeSkip: {
+          std::string e = "Target '" + this->Target->GetName() +
+            "' was changed to a FRAMEWORK sometime after install().  "
+            "This may result in the wrong install DESTINATION.  "
+            "Set the FRAMEWORK property earlier.";
+          this->Target->GetGlobalGenerator()->GetCMakeInstance()->IssueMessage(
+            MessageType::AUTHOR_WARNING, e, this->GetBacktrace());
+        } break;
+      }
 
       // Install the whole framework directory.
       type = cmInstallType_DIRECTORY;