#//////////////////////////////////////////////////////////////////////////////////////
#// This file is distributed under the University of Illinois/NCSA Open Source License.
#// See LICENSE file in top directory for details.
#//
#// Copyright (c) 2023 QMCPACK developers.
#//
#// File developed by: Ye Luo, yeluo@anl.gov, Argonne National Laboratory
#//
#// File created by: Ye Luo, yeluo@anl.gov, Argonne National Laboratory
#//////////////////////////////////////////////////////////////////////////////////////

# To enable a custom qmcplusplus::isnan, remove fast-math. Only the file scope CMAKE_CXX_FLAGS gets affected.
if(CMAKE_CXX_FLAGS MATCHES " -ffast-math")
  string(REPLACE " -ffast-math" " -fno-fast-math" CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS})
endif()

add_library(platform_cpu_runtime math.cpp)
target_link_libraries(platform_cpu_runtime INTERFACE Math::scalar_vector_functions)

set(CPU_SRCS BlasThreadingEnv.cpp OMPThreadCountProtectorLA.cpp)
add_library(platform_cpu_LA ${CPU_SRCS})
target_link_libraries(platform_cpu_LA PUBLIC Math::BLAS_LAPACK platform_cpu_runtime)
if(BLAS_LIBRARIES MATCHES openblas)
  # Handle OpenBLAS changing number of OpenMP threads https://github.com/xianyi/OpenBLAS/issues/3940 
  target_compile_definitions(platform_cpu_LA PRIVATE HAVE_OPENBLAS)
endif()