Split Accelerator.hpp into multiple tcc files, one for each accelerator API

Author: giltirn

configure.ac

@@ -104,6 +104,14 @@ if test "x$enable_openmp" = "xyes"; then
      AC_MSG_FAILURE([OpenMP support was requested, but your compiler does not appear to support it])])
 fi
 
+
+if test "x$enable_cuda" = "xno" && test "x$enable_hip" = "xno" && test "x$enable_sycl" = "xno" && test "x$enable_openmp" = "xno" ; then
+   AC_MSG_FAILURE([No accelerator API was provided (CUDA,HIP,SYCL,OpenMP)])
+fi
+
+
+
+
 # Check for the --enable-cublas option
 AC_ARG_ENABLE([cublas],
   [AS_HELP_STRING([--enable-cublas],

doc/installation.md

@@ -1,11 +1,17 @@
 ## Dependencies
 
   * MPI
-  * OpenMP
-  * CUDA, HIP, SYCL (Optional)
-  * cuBLAS (CUDA), rocBLAS (HIP), oneMKL (SYCL)  (Optional)
-
-The non-GPU implementation is primarily for testing and development, and is not likely to achieve optimal performance
+  * Accelerator API, one of:
+      * CUDA
+      * HIP
+      * SYCL
+      * OpenMP (CPU-threading only, for testing/development -- not performant!)
+  * Host-side thread API (optional)
+      * OpenMP
+  * BLAS library for high-performance linear algebra (optional, recommended)
+      * cuBLAS (CUDA)
+      * rocBLAS (HIP)
+      * oneMKL (SYCL)
 
 ## Installation