From fe30d7d432dc3cc6ab11cd71a1d0acc9baf98680 Mon Sep 17 00:00:00 2001
From: Joel Winarske <joel.winarske@toyotaconnected.com>
Date: Wed, 22 Jan 2025 18:36:58 -0800
Subject: [PATCH] LLVM_CONFIG cmake variable

-enable setting toolchain via LLVM_CONFIG

Signed-off-by: Joel Winarske <joel.winarske@toyotaconnected.com>
---
 cmake/context.cmake | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/cmake/context.cmake b/cmake/context.cmake
index 91e809c2..facc2c8c 100644
--- a/cmake/context.cmake
+++ b/cmake/context.cmake
@@ -34,8 +34,11 @@ endif ()
 # libc++
 #
 if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
+    if (NOT LLVM_CONFIG)
+        set(LLVM_CONFIG llvm-config)
+    endif ()
     execute_process(
-            COMMAND llvm-config --version
+            COMMAND ${LLVM_CONFIG} --version
             OUTPUT_VARIABLE LLVM_VERSION
             OUTPUT_STRIP_TRAILING_WHITESPACE
     )
@@ -45,14 +48,14 @@ if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
 
     if (NOT LLVM_ROOT)
         execute_process(
-                COMMAND llvm-config --prefix
+                COMMAND ${LLVM_CONFIG} --prefix
                 OUTPUT_VARIABLE LLVM_ROOT
                 OUTPUT_STRIP_TRAILING_WHITESPACE
         )
     endif ()
 
     if (NOT LLVM_ROOT)
-        message(WARNING "LLVM_ROOT not detected, using default")
+        message(WARNING "LLVM_ROOT not detected, using system default")
         set(LLVM_ROOT "/usr")
     endif ()
 
@@ -63,7 +66,7 @@ if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
     set(CONTEXT_COMPILE_OPTIONS $<$<COMPILE_LANGUAGE:CXX>:-stdlib=libc++> $<$<COMPILE_LANGUAGE:CXX>:-isystem${LLVM_ROOT}/include/c++/v1/>)
 
     execute_process(
-            COMMAND llvm-config --cmakedir
+            COMMAND ${LLVM_CONFIG} --cmakedir
             OUTPUT_VARIABLE LLVM_CMAKE_DIR
             OUTPUT_STRIP_TRAILING_WHITESPACE
     )