fileapi: Fix codemodel target install destination for cross-dir rules

Since commit e89ad0f94e (install: Allow installing targets created in
another directory, 2018-06-18, v3.13.0-rc1~407^2) we support calling
`install(TARGETS)` for targets created in another directory.  However,
install generators are associated with the directory in which the call
to `install()` appears.  This may not be the same directory in which the
target is defined.  Record in each target the list of install generators
it has.

Fixes: #19546

1 files changed, 3 insertions, 6 deletions

diff --git a/Source/cmFileAPICodemodel.cxx b/Source/cmFileAPICodemodel.cxx
index 0fb166a..6025025 100644
--- a/Source/cmFileAPICodemodel.cxx
+++ b/Source/cmFileAPICodemodel.cxx
@@ -1025,12 +1025,9 @@ Json::Value Target::DumpInstallPrefix()
 Json::Value Target::DumpInstallDestinations()
 {
   Json::Value destinations = Json::arrayValue;
-  auto installGens = this->GT->Makefile->GetInstallGenerators();
-  for (auto iGen : installGens) {
-    auto itGen = dynamic_cast<cmInstallTargetGenerator*>(iGen);
-    if (itGen != nullptr && itGen->GetTarget() == this->GT) {
-      destinations.append(this->DumpInstallDestination(itGen));
-    }
+  auto installGens = this->GT->Target->GetInstallGenerators();
+  for (auto itGen : installGens) {
+    destinations.append(this->DumpInstallDestination(itGen));
   }
   return destinations;
 }