From 4688b5ce895761c884ae15fc0234ed8d623b988b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Aleix=20Bon=C3=A9?= <aleix.boneribo@bsc.es>
Date: Tue, 2 Jul 2024 15:41:47 +0200
Subject: [PATCH] cmake: use clang from cmake variable

---
 cmake/LLVM.cmake | 22 ++++++++++++++++++++--
 1 file changed, 20 insertions(+), 2 deletions(-)

diff --git a/cmake/LLVM.cmake b/cmake/LLVM.cmake
index 71b786dc7..f4dbda065 100644
--- a/cmake/LLVM.cmake
+++ b/cmake/LLVM.cmake
@@ -281,11 +281,29 @@ macro(find_program_or_die OUTPUT_VAR PROG_NAME DOCSTRING)
   endif()
 endmacro()
 
-find_program_or_die( CLANG "clang" "clang binary")
+# -DCMAKE_C_COMPILER=riscv64-unknown-linux-gnu-clang -DCMAKE_CXX_COMPILER=riscv64-unknown-linux-gnu-clang++
+
+# if(DEFINED CLANG_EXECUTABLE)
+if(DEFINED CMAKE_C_COMPILER)
+  # set(CLANG "${CLANG_EXECUTABLE}")
+  set(CLANG "${CMAKE_C_COMPILER}")
+  message(STATUS "Using CLANG_EXECUTABLE: ${CLANG}")
+else()
+  find_program_or_die( CLANG "clang" "clang binary")
+endif()
 execute_process(COMMAND "${CLANG}" "--version" OUTPUT_VARIABLE LLVM_CLANG_VERSION RESULT_VARIABLE CLANG_RES)
+
 # TODO this should be optional
-find_program_or_die( CLANGXX "clang++" "clang++ binary")
+# if(DEFINED CLANGXX_EXECUTABLE)
+if(DEFINED CMAKE_CXX_COMPILER)
+  # set(CLANGXX "${CLANGXX_EXECUTABLE}")
+  set(CLANGXX "${CMAKE_CXX_COMPILER}")
+  message(STATUS "Using CLANGXX_EXECUTABLE: ${CLANGXX}")
+else()
+  find_program_or_die( CLANGXX "clang++" "clang++ binary")
+endif()
 execute_process(COMMAND "${CLANGXX}" "--version" OUTPUT_VARIABLE LLVM_CLANGXX_VERSION RESULT_VARIABLE CLANGXX_RES)
+
 if(CLANGXX_RES OR CLANG_RES)
   message(FATAL_ERROR "Failed running clang/clang++ --version")
 endif()
-- 
2.45.1