From 174f0bb07a20e0486ae3f1d0f0d4bf9437934b6b Mon Sep 17 00:00:00 2001
From: Ashley Ruglys <ashley.ruglys@gmail.com>
Date: Tue, 6 Feb 2024 21:27:31 +1300
Subject: [PATCH] Allow setting a custom dir to pull the clang includes from

---
 bbl/CMakeLists.txt | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/bbl/CMakeLists.txt b/bbl/CMakeLists.txt
index 21f0cf7..5a1876e 100644
--- a/bbl/CMakeLists.txt
+++ b/bbl/CMakeLists.txt
@@ -147,20 +147,24 @@ install(
     ${CMAKE_INSTALL_LIBDIR}/cmake/babble
 )
 
+if(NOT DEFINED LIBCLANG_DIR)
+  set(LIBCLANG_DIR ${CLANG_INSTALL_PREFIX})
+endif()
+
 # copy the clang resource dir to the installation so we can pick up the headers
 # first need to extract the major version to get the right path from the 
 # llvm installation
 install(
   DIRECTORY
-    ${CLANG_INSTALL_PREFIX}/lib/clang/${LLVM_VERSION_MAJOR}/include
+    ${LIBCLANG_DIR}/lib/clang/${LLVM_VERSION_MAJOR}/include
     DESTINATION
       ${CMAKE_INSTALL_LIBDIR}/resource
 )
 
 # also copy it to the binary dir so we can pick it up in the test runner
 file(
-  COPY 
-    ${CLANG_INSTALL_PREFIX}/lib/clang/${LLVM_VERSION_MAJOR}/include
+  COPY
+    ${LIBCLANG_DIR}/lib/clang/${LLVM_VERSION_MAJOR}/include
   DESTINATION
     ${CMAKE_BINARY_DIR}
-)
\ No newline at end of file
+)