1 files changed, 9 insertions, 0 deletions
diff --git a/Source/cmcmd.cxx b/Source/cmcmd.cxx
index 7eeb97f..2bccbc7 100644
--- a/Source/cmcmd.cxx
+++ b/Source/cmcmd.cxx
@@ -1697,6 +1697,11 @@ int cmcmd::RunPreprocessor(const std::vector<std::string>& command,
   }
   auto status = process.GetStatus();
   if (!status[0] || status[0]->ExitStatus != 0) {
+    auto errorStream = process.ErrorStream();
+    if (errorStream) {
+      std::cerr << errorStream->rdbuf();
+    }
+
     return 1;
   }
 
@@ -1765,6 +1770,10 @@ int cmcmd::RunLLVMRC(std::vector<std::string> const& args)
   }
   auto status = process.GetStatus();
   if (!status[0] || status[0]->ExitStatus != 0) {
+    auto errorStream = process.ErrorStream();
+    if (errorStream) {
+      std::cerr << errorStream->rdbuf();
+    }
     return 1;
   }