[clang] [clang] Only build c-index-test when clang tests are included (PR #151157)

[David Spickett via cfe-commits]

https://github.com/DavidSpickett created https://github.com/llvm/llvm-project/pull/151157

c-index-test is only used for testing, and it's used in tests that are already guarded by CLANG_INCLUDE_TESTS in clang/CMakeLists.txt.

This change enables us to do builds with LLVM_INSTALL_TOOLCHAIN_ONLY=OFF, and CLANG_INCLUDE_TESTS=OFF, which contain the required files to build other bits of llvm-project standalone, but does not include c-index-test which we have no need for.

>From 714a9cb319a8946fa670c7e8bbe7f29f847fa45f Mon Sep 17 00:00:00 2001
From: David Spickett <david.spickett at linaro.org>
Date: Tue, 29 Jul 2025 14:17:56 +0000
Subject: [PATCH] [clang] Only build c-index-test when clang tests are included

c-index-test is only used for testing, and it's used in tests
that are already guarded by CLANG_INCLUDE_TESTS in clang/CMakeLists.txt.

This change enables us to do builds with LLVM_INSTALL_TOOLCHAIN_ONLY=OFF,
and CLANG_INCLUDE_TESTS=OFF, which contain the required files
to build other bits of llvm-project standalone, but does not
include c-index-test which we have no need for.
---
 clang/tools/CMakeLists.txt | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/clang/tools/CMakeLists.txt b/clang/tools/CMakeLists.txt
index 50e3d694236ac..99292f3d6ca9a 100644
--- a/clang/tools/CMakeLists.txt
+++ b/clang/tools/CMakeLists.txt
@@ -23,7 +23,9 @@ if(HAVE_CLANG_REPL_SUPPORT)
   add_clang_subdirectory(clang-repl)
 endif()
 
-add_clang_subdirectory(c-index-test)
+if(CLANG_INCLUDE_TESTS)
+  add_clang_subdirectory(c-index-test)
+endif()
 
 add_clang_subdirectory(clang-refactor)
 # For MinGW/Cygwin we only enable shared library if LLVM_LINK_LLVM_DYLIB=ON.