From 013d0631e6842230b6043742289bc05de66f6402 Mon Sep 17 00:00:00 2001
From: howetuft <howetuft>
Date: Mon, 7 Mar 2022 15:42:47 +0100
Subject: Add CMake option to control CUDA host compiler

This revision allows to specify CUDA host compiler (nvcc's -ccbin command
line option) when configuring the build. It addresses the case where the
C/C++ compiler to be used in CUDA toolchain should be different from the
default C/C++ compiler, for instance in case of compilers versions conflicts
or multiple installed compilers.

The new CMake option is named `CUDA_HOST_COMPILER` and can be used as follows:
`cmake -DCUDA_HOST_COMPILER=<path-to-host-compiler>`

If the option is not specified, the build configuration behaves as previously.

Differential Revision: https://developer.blender.org/D14248
---
 intern/cycles/kernel/CMakeLists.txt | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/intern/cycles/kernel/CMakeLists.txt b/intern/cycles/kernel/CMakeLists.txt
index cfd503a621d..d660289ed17 100644
--- a/intern/cycles/kernel/CMakeLists.txt
+++ b/intern/cycles/kernel/CMakeLists.txt
@@ -407,6 +407,11 @@ if(WITH_CYCLES_CUDA_BINARIES)
       -o ${CMAKE_CURRENT_BINARY_DIR}/${cuda_file}
       -Wno-deprecated-gpu-targets)
 
+    if(CUDA_HOST_COMPILER)
+      set(cuda_flags ${cuda_flags}
+        -ccbin="${CUDA_HOST_COMPILER}")
+    endif()
+
     if(WITH_NANOVDB)
       set(cuda_flags ${cuda_flags}
         -D WITH_NANOVDB
-- 
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