find_*(): Add CMAKE_IGNORE_PREFIX_PATH variable

Fixes: #20878

1 files changed, 12 insertions, 1 deletions

diff --git a/Source/cmFindPackageCommand.cxx b/Source/cmFindPackageCommand.cxx
index 85badf6..fac0e08 100644
--- a/Source/cmFindPackageCommand.cxx
+++ b/Source/cmFindPackageCommand.cxx
@@ -665,6 +665,16 @@ bool cmFindPackageCommand::FindPackageUsingConfigMode()
   this->IgnoredPaths.clear();
   this->IgnoredPaths.insert(ignored.begin(), ignored.end());
 
+  // get igonored prefix paths from vars and reroot them.
+  std::vector<std::string> ignoredPrefixes;
+  this->GetIgnoredPrefixPaths(ignoredPrefixes);
+  this->RerootPaths(ignoredPrefixes);
+
+  // Construct a set of ignored prefix paths
+  this->IgnoredPrefixPaths.clear();
+  this->IgnoredPrefixPaths.insert(ignoredPrefixes.begin(),
+                                  ignoredPrefixes.end());
+
   // Find and load the package.
   return this->HandlePackageMode(HandlePackageModeType::Config);
 }
@@ -2291,7 +2301,8 @@ bool cmFindPackageCommand::SearchPrefix(std::string const& prefix_in)
   if (prefixWithoutSlash != "/" && prefixWithoutSlash.back() == '/') {
     prefixWithoutSlash.erase(prefixWithoutSlash.length() - 1);
   }
-  if (this->IgnoredPaths.count(prefixWithoutSlash)) {
+  if (this->IgnoredPaths.count(prefixWithoutSlash) ||
+      this->IgnoredPrefixPaths.count(prefixWithoutSlash)) {
     return false;
   }