### Initialize CMake (some internal stuff)
cmake_minimum_required(VERSION 3.0)
set(CMAKE_DISABLE_IN_SOURCE_BUILD ON)

# Enable project
project(NEO-2-NTV)
enable_language(Fortran)

set(EXE_NAME "neo_2.x")

### Define paths to external libraries (load external file)
### Installation directory
set (CMAKE_INSTALL_PREFIX ${CMAKE_SOURCE_DIR})

### Path to the external libraries
set(PROJLIBS /proj/plasma/Libs/ CACHE STRING "Common library path")

set(GSL_PATH ${PROJLIBS}GSL_gcc-6.3/gsl-2.3/LIB)
set(GSL_LIB ${GSL_PATH}/lib/ CACHE STRING "GSL path")

set(FGSL_PATH /proj/plasma/Libs/FGSL_gcc-6.3/fgsl-1.2.0/LIB CACHE STRING "FGSL path")
set(FGSL_LIB ${FGSL_PATH}/lib/)
set(FGSL_INC ${FGSL_PATH}/include/fgsl/)

### Path to the ATLAS libraries
set(ATLASLIBS /usr/lib/atlas-base/)
set(LAPACK_LIB ${ATLASLIBS}/atlas/)
set(F77BLAS_LIB ${ATLASLIBS})
set(ATLASBLAS_LIB ${ATLASLIBS})

### Path to OpenBLAS
set(OPEN_BLAS_PATH /usr/lib/openblas-base/)
set(OPEN_BLAS_LAPACK_LIB ${OPEN_BLAS_PATH})
set(OPEN_BLAS_LIB ${OPEN_BLAS_PATH})

# Print the current compiler
message(STATUS "The Compiler ID is ${CMAKE_Fortran_COMPILER_ID}")

# Include directories for NEO-2
include_directories(${NEO2_Inc})
set(CMAKE_Fortran_FLAGS_DEBUG "-O0 -cpp -g -ffpe-trap=invalid,zero,overflow -fcheck=all -fbacktrace -Wall -Wno-unused-dummy-argument") 
set(CFLAGS "-O2 -DDOUBLE_APPEND_FORTRAN")

### Define container for *.o and *.mod files
set(CMAKE_Fortran_MODULE_DIRECTORY ${PROJECT_BINARY_DIR}/OBJS)

### Find libraries
# GSL
find_library(gsl_lib gsl ${GSL_LIB})
# FGSL
find_library(fgsl_lib fgsl ${FGSL_LIB} NO_DEFAULT_PATH)
include_directories(${FGSL_INC})

# LAPACK and BLAS
if (CMAKE_Fortran_COMPILER_ID MATCHES "GNU")
  find_library(lapack_lib lapack ${LAPACK_LIB} NO_DEFAULT_PATH)
  find_library(f77blas_lib f77blas ${F77BLAS_LIB} NO_DEFAULT_PATH)
  find_library(atlas_lib atlas ${ATLASBLAS_LIB} NO_DEFAULT_PATH)
  find_library(open_blas_lapack_lib lapack ${OPEN_BLAS_LAPACK_LIB} NO_DEFAULT_PATH)
  find_library(open_blas_lib blas ${OPEN_BLAS_LIB} NO_DEFAULT_PATH)
endif ()

### Source files
set(NEO2_SRC_FILES
        ./neo2.f90
)
set_source_files_properties(${NEO2_SRC_FILES} PROPERTIES COMPILE_FLAGS "${DEBUGFLAG} ${FFLAG_DEBUG} ${FFLAGS}")

### Define executable
add_executable(${EXE_NAME}
  ${NEO2_SRC_FILES}
)

if (CMAKE_Fortran_COMPILER_ID MATCHES "GNU")
  set(LINALG_LIBRARIES ${lapack_lib} ${f77blas_lib} ${atlas_lib})
endif ()

### Add libraries linked with executable
target_link_libraries(${EXE_NAME}
        ${fgsl_lib} ${gsl_lib}
        ${LINALG_LIBRARIES}
        )