From 6e17217d7b77a27bdf77da2c20044e89f112e9b1 Mon Sep 17 00:00:00 2001
From: Paul Zander <negril.nx+gentoo@gmail.com>
Date: Sun, 10 Nov 2024 17:19:56 +0100
Subject: do not inject include dirs with installed llvm

`string(FIND returns` returns `-1` on failure not `FALSE`.
If `_llvmSourceRoot` is equal to to first directory in `LLVM_INCLUDE_DIRS` 
this would include non-existant directories.

Signed-off-by: Paul Zander <negril.nx+gentoo@gmail.com>

diff --git a/cmake/FindClang.cmake b/cmake/FindClang.cmake
index b4f0b0a..eda8bb5 100644
--- a/cmake/FindClang.cmake
+++ b/cmake/FindClang.cmake
@@ -95,8 +95,7 @@ if(CLANG_FOUND)
     OUTPUT_VARIABLE _llvmSourceRoot
     OUTPUT_STRIP_TRAILING_WHITESPACE
   )
-  string(FIND "${LLVM_INCLUDE_DIRS}" "${_llvmSourceRoot}" _llvmIsInstalled)
-  if (NOT _llvmIsInstalled)
+  if(NOT "${_llvmSourceRoot}" IN_LIST LLVM_INCLUDE_DIRS)
     message(STATUS "Detected that llvm-config comes from a build-tree, adding more include directories for Clang")
     list(APPEND CLANG_INCLUDE_DIRS
          "${LLVM_INSTALL_PREFIX}/tools/clang/include" # build dir
diff --git a/cmake/FindLLVM.cmake b/cmake/FindLLVM.cmake
index c625eeb..1e1e902 100644
--- a/cmake/FindLLVM.cmake
+++ b/cmake/FindLLVM.cmake
@@ -140,8 +140,7 @@ if (LLVM_FOUND)
     OUTPUT_VARIABLE _llvmSourceRoot
     OUTPUT_STRIP_TRAILING_WHITESPACE
   )
-  string(FIND "${LLVM_INCLUDE_DIRS}" "${_llvmSourceRoot}" _llvmIsInstalled)
-  if (NOT _llvmIsInstalled)
+  if(NOT "${_llvmSourceRoot}" IN_LIST LLVM_INCLUDE_DIRS)
     list(APPEND LLVM_INCLUDE_DIRS "${LLVM_INSTALL_PREFIX}/include")
   endif()
 endif()
-- 
2.47.0