From dc95d0c525636aed53a3b38258efa2dff4c83edf Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20Storsj=C3=B6?= <martin@martin.st>
Date: Thu, 14 Jul 2022 22:46:04 +0300
Subject: [PATCH] [clang-tidy] Add CLANG_TIDY_CONFUSABLE_CHARS_GEN cmake cache
 variable to avoid building when cross compiling

This is similar to the LLVM_TABLEGEN, CLANG_TABLEGEN and
CLANG_PSEUDO_GEN cmake cache variables.

Differential Revision: https://reviews.llvm.org/D129799
---
 clang-tools-extra/clang-tidy/misc/CMakeLists.txt | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/clang-tools-extra/clang-tidy/misc/CMakeLists.txt b/clang-tools-extra/clang-tidy/misc/CMakeLists.txt
index ee8fe0b37fce..de76b4b00c36 100644
--- a/clang-tools-extra/clang-tidy/misc/CMakeLists.txt
+++ b/clang-tools-extra/clang-tidy/misc/CMakeLists.txt
@@ -3,7 +3,13 @@ set(LLVM_LINK_COMPONENTS
   Support
   )
 
-if(LLVM_USE_HOST_TOOLS)
+set(CLANG_TIDY_CONFUSABLE_CHARS_GEN "clang-tidy-confusable-chars-gen" CACHE
+  STRING "Host clang-tidy-confusable-chars-gen executable. Saves building if cross-compiling.")
+
+if(NOT CLANG_TIDY_CONFUSABLE_CHARS_GEN STREQUAL "clang-tidy-confusable-chars-gen")
+  set(make_confusable_table ${CLANG_TIDY_CONFUSABLE_CHARS_GEN})
+  set(make_confusable_table_target ${CLANG_TIDY_CONFUSABLE_CHARS_GEN})
+elseif(LLVM_USE_HOST_TOOLS)
   build_native_tool(clang-tidy-confusable-chars-gen make_confusable_table)
   set(make_confusable_table_target "${make_confusable_table}")
 else()
-- 
2.37.1.595.g718a3a8f04-goog