From 368f172fe00581dc09405a2c1f1e5ccfcb273040 Mon Sep 17 00:00:00 2001
From: Tom Tan <Tom.Tan@microsoft.com>
Date: Wed, 20 Oct 2021 22:13:43 -0700
Subject: [PATCH] Fix cmake find thrift when vcpkg is used (#1022)

---
 CMakeLists.txt | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9c39c3687f3..b6e2585631c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -15,7 +15,10 @@ project(opentelemetry-cpp)
 # Mark variables as used so cmake doesn't complain about them
 mark_as_advanced(CMAKE_TOOLCHAIN_FILE)
 
-list(APPEND CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake/modules/")
+# Don't use customized cmake modules if vcpkg is used to resolve dependence.
+if(NOT DEFINED CMAKE_TOOLCHAIN_FILE)
+  list(APPEND CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake/modules/")
+endif()
 
 if(DEFINED ENV{ARCH})
   # Architecture may be specified via ARCH environment variable