From fc4d87100a01f08dbdf78b68e1a6a5c2584d840d Mon Sep 17 00:00:00 2001
From: Vy Nguyen <vyng@google.com>
Date: Wed, 12 Feb 2025 09:33:52 -0500
Subject: [PATCH] Define -DLLVM_BUILD_TELEMETRY to be used in ifdef  (#126746)

Background:

Telemetry code isn't always built (controlled by this
LLVM_BUILD_TELEMETRY cmake flag)
This means users of the library may not have the library. So we're
definding the `-DLLVM_BUILD_TELEMETRY` to be used in ifdef.
---
 lldb/source/Core/CMakeLists.txt              | 1 -
 lldb/source/Core/Telemetry.cpp               | 6 ++++--
 llvm/include/llvm/Config/llvm-config.h.cmake | 3 +++
 3 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/lldb/source/Core/CMakeLists.txt b/lldb/source/Core/CMakeLists.txt
index cf5f6ac9da489..82fb5f42f9f4b 100644
--- a/lldb/source/Core/CMakeLists.txt
+++ b/lldb/source/Core/CMakeLists.txt
@@ -18,7 +18,6 @@ endif()
 
 if (LLVM_BUILD_TELEMETRY)
    set(TELEMETRY_DEPS Telemetry)
-   add_definitions(-DLLDB_BUILD_TELEMETRY)
 endif()
 
 # TODO: Add property `NO_PLUGIN_DEPENDENCIES` to lldbCore
diff --git a/lldb/source/Core/Telemetry.cpp b/lldb/source/Core/Telemetry.cpp
index 99f5d43ccbaf0..0d0d7c1df3bb9 100644
--- a/lldb/source/Core/Telemetry.cpp
+++ b/lldb/source/Core/Telemetry.cpp
@@ -6,7 +6,9 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifdef LLDB_BUILD_TELEMETRY
+#include "llvm/Config/llvm-config.h"
+
+#ifdef LLVM_BUILD_TELEMETRY
 
 #include "lldb/Core/Telemetry.h"
 #include "lldb/Core/Debugger.h"
@@ -71,4 +73,4 @@ llvm::Error TelemetryManager::preDispatch(TelemetryInfo *entry) {
 } // namespace telemetry
 } // namespace lldb_private
 
-#endif // LLDB_BUILD_TELEMETRY
+#endif // LLVM_BUILD_TELEMETRY
diff --git a/llvm/include/llvm/Config/llvm-config.h.cmake b/llvm/include/llvm/Config/llvm-config.h.cmake
index 629977cc11d68..239f9dd3f38db 100644
--- a/llvm/include/llvm/Config/llvm-config.h.cmake
+++ b/llvm/include/llvm/Config/llvm-config.h.cmake
@@ -201,4 +201,7 @@
 /* Define if logf128 is available */
 #cmakedefine LLVM_HAS_LOGF128
 
+/* Define if building LLVM with LLVM_BUILD_TELEMETRY */
+#cmakedefine LLVM_BUILD_TELEMETRY ${LLVM_BUILD_TELEMETRY}
+
 #endif