kokkos: add support for replacing -isystem on demand

UoB-HPC · Sep 1, 2021 · 71a2ed5 · 71a2ed5
1 parent 295c0fe
commit 71a2ed5
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diff --git a/kokkos/CMakeLists.txt b/kokkos/CMakeLists.txt
@@ -2,6 +2,13 @@ cmake_minimum_required(VERSION 3.12 FATAL_ERROR)
 
 project(bude_kokkos)
 
+# XXX CMAKE_INCLUDE_SYSTEM_FLAG_* must be set after entry into this script as the flag gets overwritten at CMake initialisaiton.
+# so we can't just pass -DCMAKE_INCLUDE_SYSTEM_FLAG_CXX=...
+if(CUSTOM_SYSTEM_INCLUDE_FLAG)
+    set(CMAKE_INCLUDE_SYSTEM_FLAG_CXX "${CUSTOM_SYSTEM_INCLUDE_FLAG}")
+    set(CMAKE_INCLUDE_SYSTEM_FLAG_C   "${CUSTOM_SYSTEM_INCLUDE_FLAG}")
+endif()
+
 set(CMAKE_CXX_STANDARD 14)
 set(CMAKE_CXX_EXTENSIONS OFF)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)

diff --git a/kokkos/README.md b/kokkos/README.md
@@ -19,6 +19,7 @@ Flags:
   * `FORWARD_CXX_EXTRA_FLAGS_TO_KOKKOS` : `ON|OFF`, whether to forward `CXX_EXTRA_FLAGS` when building Kokkos. This is `OFF` by default as Kokkos has a set of tested flags for each compiler. 
 * `Kokkos_ROOT`: `STRING`, path to the local Kokkos installation, this is optional and mutually exclusive with `KOKKOS_IN_TREE`.  
 * `DEFAULT_WGSIZE`: `INGEGER`, sets the [block size](#block-size). Defaults to 64.
+* `CUSTOM_SYSTEM_INCLUDE_FLAG`, sets the prefix flag for including system libraries. For example, setting this flag to `-I` replaces all `-isystem <headers...>` with `-I <headers...>`. 
 
 Compilers can be specified via the usual CMake options, for example: