#
# Copyright (C) 2010-2020  (see AUTHORS file for a list of contributors)
#
# GNSS-SDR is a software-defined Global Navigation Satellite Systems receiver
#
# This file is part of GNSS-SDR.
#
# SPDX-License-Identifier: GPL-3.0-or-later
#


########################################################################
# header file detection
########################################################################
include(CheckIncludeFile)
check_include_file(cpuid.h HAVE_CPUID_H)
if(HAVE_CPUID_H)
    add_definitions(-DHAVE_CPUID_H)
endif()

check_include_file(intrin.h HAVE_INTRIN_H)
if(HAVE_INTRIN_H)
    add_definitions(-DHAVE_INTRIN_H)
endif()

check_include_file(fenv.h HAVE_FENV_H)
if(HAVE_FENV_H)
    add_definitions(-DHAVE_FENV_H)
endif()

check_include_file(dlfcn.h HAVE_DLFCN_H)
if(HAVE_DLFCN_H)
    add_definitions(-DHAVE_DLFCN_H)
    list(APPEND volk_gnsssdr_libraries ${CMAKE_DL_LIBS})
endif()

########################################################################
# Setup the compiler name
########################################################################
set(COMPILER_NAME ${CMAKE_C_COMPILER_ID})
if(MSVC) # its not set otherwise
    set(COMPILER_NAME MSVC)
endif()

message(STATUS "Compiler name: ${COMPILER_NAME}")

if(NOT DEFINED COMPILER_NAME)
    message(FATAL_ERROR "COMPILER_NAME undefined. Volk-gnsssdr build may not support this compiler.")
endif()

########################################################################
# Special clang flag so flag checks can fail
########################################################################
if(COMPILER_NAME MATCHES "GNU")
    include(CheckCXXCompilerFlag)
    check_cxx_compiler_flag("-Werror=unused-command-line-argument" HAVE_WERROR_UNUSED_CMD_LINE_ARG)
    if(HAVE_WERROR_UNUSED_CMD_LINE_ARG)
        set(VOLK_FLAG_CHECK_FLAGS "-Werror=unused-command-line-argument")
    endif()
endif()

########################################################################
# POSIX_MEMALIGN: If we have to fall back to `posix_memalign`,
# make it known to the compiler.
########################################################################
if(HAVE_POSIX_MEMALIGN)
    message(STATUS "Use `posix_memalign` for aligned malloc!")
    add_definitions(-DHAVE_POSIX_MEMALIGN)
endif()

########################################################################
# detect x86 flavor of CPU
########################################################################
if(${CMAKE_SYSTEM_PROCESSOR} MATCHES "^(i.86|x86|x86_64|amd64|AMD64)$")
    message(STATUS "x86* CPU detected")
    set(CPU_IS_x86 TRUE)
endif()

########################################################################
# determine passing architectures based on compile flag tests
########################################################################
if(NOT PYTHON_DASH_B)
    set(PYTHON_DASH_B "")
endif()
if(USE_CPU_FEATURES)
    set(VOLK_GNSSSSDR_ARCHS_XML_FILE "archs.xml")
else()
    set(VOLK_GNSSSSDR_ARCHS_XML_FILE "archs_old.xml")
endif()
configure_file(${PROJECT_SOURCE_DIR}/gen/volk_gnsssdr_arch_defs.py.in
    ${PROJECT_SOURCE_DIR}/gen/volk_gnsssdr_arch_defs.py
    @ONLY
)

execute_process(
    COMMAND ${PYTHON_EXECUTABLE} ${PYTHON_DASH_B}
    ${PROJECT_SOURCE_DIR}/gen/volk_gnsssdr_compile_utils.py
    --mode "arch_flags" --compiler "${COMPILER_NAME}"
    OUTPUT_VARIABLE arch_flag_lines OUTPUT_STRIP_TRAILING_WHITESPACE
)

macro(check_arch arch_name)
    set(flags ${ARGN})
    set(have_${arch_name} TRUE)
    foreach(flag ${flags})
        if(MSVC AND (${flag} STREQUAL "/arch:SSE2" OR ${flag} STREQUAL "/arch:SSE"))
            # SSE/SSE2 is supported in MSVC since VS 2005 but flag not available when compiling 64-bit so do not check
        else()
            include(CheckCXXCompilerFlag)
            set(have_flag have${flag})
            # make the have_flag have nice alphanum chars (just for looks/not necessary)
            execute_process(
                COMMAND ${PYTHON_EXECUTABLE} -c "import re; print(re.sub('\\W', '_', '${have_flag}'))"
                OUTPUT_VARIABLE have_flag OUTPUT_STRIP_TRAILING_WHITESPACE
            )
            if(VOLK_FLAG_CHECK_FLAGS)
                set(CMAKE_REQUIRED_FLAGS ${VOLK_FLAG_CHECK_FLAGS})
            endif()
            check_cxx_compiler_flag(${flag} ${have_flag})
            unset(CMAKE_REQUIRED_FLAGS)
            if(NOT ${have_flag})
                set(have_${arch_name} FALSE)
            endif()
        endif()
    endforeach()
    if(have_${arch_name})
        list(APPEND available_archs ${arch_name})
    endif()
endmacro()

foreach(line ${arch_flag_lines})
    string(REGEX REPLACE "," ";" arch_flags ${line})
    check_arch(${arch_flags})
endforeach()

macro(OVERRULE_ARCH arch reason)
    message(STATUS "${reason}, Overruled arch ${arch}")
    list(REMOVE_ITEM available_archs ${arch})
endmacro()

########################################################################
# eliminate AVX on if not on x86, or if the compiler does not accept
# the xgetbv instruction, or {if not cross-compiling and the xgetbv
# executable does not function correctly}.
########################################################################
set(HAVE_XGETBV 0)
set(HAVE_AVX_CVTPI32_PS 0)
if(CPU_IS_x86)
    # check to see if the compiler/linker works with xgetb instruction
    if(NOT MSVC)
        file(WRITE ${CMAKE_CURRENT_BINARY_DIR}/test_xgetbv.c "#include <volk_gnsssdr/volk_gnsssdr_common.h>\n unsigned long long _xgetbv(unsigned int index) { unsigned int eax, edx; __VOLK_ASM __VOLK_VOLATILE(\"xgetbv\" : \"=a\"(eax), \"=d\"(edx) : \"c\"(index)); return ((unsigned long long)edx << 32) | eax; } int main (void) { (void) _xgetbv(0); return (0); }")
        set(_AUX_INCLUDE_FLAG -I${PROJECT_SOURCE_DIR}/include)
    else()
        # MSVC defines an intrinsic
        file(WRITE ${CMAKE_CURRENT_BINARY_DIR}/test_xgetbv.c "#include <stdio.h> \n #include <intrin.h> \n int main() { int avxSupported = 0; \n#if (_MSC_FULL_VER >= 160040219) \nint cpuInfo[4]; __cpuid(cpuInfo, 1);\nif ((cpuInfo[2] & (1 << 27) || 0) && (cpuInfo[2] & (1 << 28) || 0)) \n{\nunsigned long long xcrFeatureMask = _xgetbv(_XCR_XFEATURE_ENABLED_MASK);\n   avxSupported = (xcrFeatureMask & 0x6) == 6;}\n#endif \n return 1- avxSupported; }")
    endif()
    execute_process(COMMAND ${CMAKE_C_COMPILER} ${_AUX_INCLUDE_FLAG} -o
        ${CMAKE_CURRENT_BINARY_DIR}/test_xgetbv
        ${CMAKE_CURRENT_BINARY_DIR}/test_xgetbv.c
        OUTPUT_QUIET ERROR_QUIET
        RESULT_VARIABLE avx_compile_result
    )
    if(NOT ${avx_compile_result} EQUAL 0)
        overrule_arch(avx "Compiler or linker missing xgetbv instruction")
    else()
        # compiler/linker seems to work; assume working
        set(HAVE_XGETBV 1)
    endif()
    file(REMOVE ${CMAKE_CURRENT_BINARY_DIR}/test_xgetbv
        ${CMAKE_CURRENT_BINARY_DIR}/test_xgetbv.c
    )

    #########################################################################
    # eliminate AVX if cvtpi32_ps intrinsic fails like some versions of clang
    #########################################################################

    # check to see if the compiler/linker works with cvtpi32_ps intrinsic when using AVX
    if(CMAKE_SIZEOF_VOID_P EQUAL 4)
        file(WRITE ${CMAKE_CURRENT_BINARY_DIR}/test_cvtpi32_ps.c "#include <immintrin.h>\nint main (void) {__m128 __a; __m64 __b; __m128 foo = _mm_cvtpi32_ps(__a, __b); return (0); }")
        execute_process(COMMAND ${CMAKE_C_COMPILER} -mavx -o
            ${CMAKE_CURRENT_BINARY_DIR}/test_cvtpi32_ps
            ${CMAKE_CURRENT_BINARY_DIR}/test_cvtpi32_ps.c
            OUTPUT_QUIET ERROR_QUIET
            RESULT_VARIABLE avx_compile_result
        )
        if(NOT ${avx_compile_result} EQUAL 0)
            overrule_arch(avx "Compiler missing cvtpi32_ps intrinsic")
        else()
            set(HAVE_AVX_CVTPI32_PS 1)
        endif()
        file(REMOVE ${CMAKE_CURRENT_BINARY_DIR}/test_cvtpi32_ps
            ${CMAKE_CURRENT_BINARY_DIR}/test_cvtpi32_ps.c
        )
    else()
        # 64-bit compilations won't need this command so don't overrule AVX
        set(HAVE_AVX_CVTPI32_PS 0)
    endif()

    # Disable SSE4a if Clang is less than version 3.2
    if(CMAKE_C_COMPILER_ID MATCHES "Clang")
        # Figure out the version of Clang
        if(CMAKE_VERSION VERSION_LESS "2.8.10")
            # Extract the Clang version from the --version string.
            # In cmake 2.8.10, we can just use CMAKE_C_COMPILER_VERSION
            # without having to go through these string manipulations
            execute_process(COMMAND ${CMAKE_C_COMPILER} --version
                OUTPUT_VARIABLE clang_version
            )
            string(REGEX MATCH "[0-9].[0-9]" CMAKE_C_COMPILER_VERSION ${clang_version})
        endif()

        if(CMAKE_C_COMPILER_VERSION VERSION_LESS "3.2")
            overrule_arch(sse4_a "Clang >= 3.2 required for SSE4a")
        endif()
    endif()
endif()

if(${HAVE_XGETBV})
    add_definitions(-DHAVE_XGETBV)
endif()

if(${HAVE_AVX_CVTPI32_PS})
    add_definitions(-DHAVE_AVX_CVTPI32_PS)
endif()

########################################################################
# if the CPU is not x86, eliminate all Intel SIMD
########################################################################

if(NOT CPU_IS_x86)
    overrule_arch(3dnow "Architecture is not x86 or x86_64")
    overrule_arch(mmx "Architecture is not x86 or x86_64")
    overrule_arch(sse "Architecture is not x86 or x86_64")
    overrule_arch(sse2 "Architecture is not x86 or x86_64")
    overrule_arch(sse3 "Architecture is not x86 or x86_64")
    overrule_arch(ssse3 "Architecture is not x86 or x86_64")
    overrule_arch(sse4_a "Architecture is not x86 or x86_64")
    overrule_arch(sse4_1 "Architecture is not x86 or x86_64")
    overrule_arch(sse4_2 "Architecture is not x86 or x86_64")
    overrule_arch(avx "Architecture is not x86 or x86_64")
    overrule_arch(avx512f "Architecture is not x86 or x86_64")
    overrule_arch(avx512cd "Architecture is not x86 or x86_64")
endif()

########################################################################
# Select neon based on ARM ISA version
########################################################################

# First, compile a test program to see if compiler supports neon.

include(CheckCSourceCompiles)

check_c_source_compiles("#include <arm_neon.h>\nint main(){ uint8_t *dest; uint8x8_t res; vst1_u8(dest, res); }"
    neon_compile_result)

if(neon_compile_result)
    set(CMAKE_REQUIRED_INCLUDES ${PROJECT_SOURCE_DIR}/include)
    check_c_source_compiles("#include <volk_gnsssdr/volk_gnsssdr_common.h>\n int main(){__VOLK_ASM __VOLK_VOLATILE(\"vrev32.8 q0, q0\");}"
        have_neonv7_result)
    check_c_source_compiles("#include <volk_gnsssdr/volk_gnsssdr_common.h>\n int main(){__VOLK_ASM __VOLK_VOLATILE(\"sub v1.4s,v1.4s,v1.4s\");}"
        have_neonv8_result)

    if(NOT have_neonv7_result)
        overrule_arch(neonv7 "Compiler doesn't support neonv7")
    endif()

    if(NOT have_neonv8_result)
        overrule_arch(neonv8 "Compiler doesn't support neonv8")
    endif()
else()
    overrule_arch(neon "Compiler doesn't support NEON")
    overrule_arch(neonv7 "Compiler doesn't support NEON")
    overrule_arch(neonv8 "Compiler doesn't support NEON")
endif()

########################################################################
# implement overruling in the ORC case,
# since ORC always passes flag detection
########################################################################
if(NOT ORC_FOUND)
    overrule_arch(orc "ORC support not found")
endif()

########################################################################
# implement overruling in the non-multilib case
# this makes things work when both -m32 and -m64 pass
########################################################################
if(NOT CROSSCOMPILE_MULTILIB AND CPU_IS_x86)
    include(CheckTypeSize)
    check_type_size("void*[8]" SIZEOF_CPU BUILTIN_TYPES_ONLY)
    if(${SIZEOF_CPU} EQUAL 64)
        overrule_arch(32 "CPU width is 64 bits")
    endif()
    if(${SIZEOF_CPU} EQUAL 32)
        overrule_arch(64 "CPU width is 32 bits")
    endif()

    # MSVC 64 bit does not have MMX, overrule it
    if(${SIZEOF_CPU} EQUAL 64 AND MSVC)
        overrule_arch(mmx "No MMX for Win64")
        if(MSVC_VERSION GREATER 1700)
            overrule_arch(sse "No SSE for Win64 Visual Studio 2013")
        endif()
    endif()

endif()

########################################################################
# done overrules! print the result
########################################################################
message(STATUS "Available architectures: ${available_archs}")

########################################################################
# determine available machines given the available architectures
########################################################################
execute_process(
    COMMAND ${PYTHON_EXECUTABLE} ${PYTHON_DASH_B}
    ${PROJECT_SOURCE_DIR}/gen/volk_gnsssdr_compile_utils.py
    --mode "machines" --archs "${available_archs}"
    OUTPUT_VARIABLE available_machines OUTPUT_STRIP_TRAILING_WHITESPACE
)

########################################################################
# Implement machine overruling for redundant machines:
# A machine is redundant when expansion rules occur,
# and the arch superset passes configuration checks.
# When this occurs, eliminate the redundant machines
# to avoid unnecessary compilation of subset machines.
########################################################################
foreach(arch mmx orc 64 32)
    foreach(machine_name ${available_machines})
        string(REPLACE "_${arch}" "" machine_name_no_arch ${machine_name})
        if(${machine_name} STREQUAL ${machine_name_no_arch})
        else()
            list(REMOVE_ITEM available_machines ${machine_name_no_arch})
        endif()
    endforeach()
endforeach()

########################################################################
# done overrules! print the result
########################################################################
message(STATUS "Available machines: ${available_machines}")

########################################################################
# Create rules to run the volk_gnsssdr generator
########################################################################

# dependencies are all python, xml, and header implementation files
file(GLOB xml_files ${PROJECT_SOURCE_DIR}/gen/*.xml)
if(USE_CPU_FEATURES)
    list(REMOVE_ITEM xml_files ${PROJECT_SOURCE_DIR}/gen/archs_old.xml)
else()
    list(REMOVE_ITEM xml_files ${PROJECT_SOURCE_DIR}/gen/archs.xml)
endif()
list(SORT xml_files)
file(GLOB py_files ${PROJECT_SOURCE_DIR}/gen/*.py)
list(SORT py_files)
file(GLOB h_files ${PROJECT_SOURCE_DIR}/kernels/volk_gnsssdr/*.h)
list(SORT h_files)

macro(gen_template tmpl output)
    list(APPEND volk_gnsssdr_gen_sources ${output})
    add_custom_command(
        OUTPUT ${output}
        DEPENDS ${xml_files} ${py_files} ${h_files} ${tmpl}
        COMMAND ${PYTHON_EXECUTABLE} ${PYTHON_DASH_B}
        ${PROJECT_SOURCE_DIR}/gen/volk_gnsssdr_tmpl_utils.py
        --input ${tmpl} --output ${output} ${ARGN}
    )
endmacro()

file(MAKE_DIRECTORY ${PROJECT_BINARY_DIR}/include/volk_gnsssdr)

gen_template(${PROJECT_SOURCE_DIR}/tmpl/volk_gnsssdr.tmpl.h              ${PROJECT_BINARY_DIR}/include/volk_gnsssdr/volk_gnsssdr.h)
gen_template(${PROJECT_SOURCE_DIR}/tmpl/volk_gnsssdr.tmpl.c              ${PROJECT_BINARY_DIR}/lib/volk_gnsssdr.c)
gen_template(${PROJECT_SOURCE_DIR}/tmpl/volk_gnsssdr_typedefs.tmpl.h     ${PROJECT_BINARY_DIR}/include/volk_gnsssdr/volk_gnsssdr_typedefs.h)
gen_template(${PROJECT_SOURCE_DIR}/tmpl/volk_gnsssdr_cpu.tmpl.h          ${PROJECT_BINARY_DIR}/include/volk_gnsssdr/volk_gnsssdr_cpu.h)
if(USE_CPU_FEATURES)
    gen_template(${PROJECT_SOURCE_DIR}/tmpl/volk_gnsssdr_cpu.tmpl.c      ${PROJECT_BINARY_DIR}/lib/volk_gnsssdr_cpu.c)
else()
    gen_template(${PROJECT_SOURCE_DIR}/tmpl/volk_gnsssdr_cpu.tmpl.old.c  ${PROJECT_BINARY_DIR}/lib/volk_gnsssdr_cpu.c)
endif()
gen_template(${PROJECT_SOURCE_DIR}/tmpl/volk_gnsssdr_config_fixed.tmpl.h ${PROJECT_BINARY_DIR}/include/volk_gnsssdr/volk_gnsssdr_config_fixed.h)
gen_template(${PROJECT_SOURCE_DIR}/tmpl/volk_gnsssdr_machines.tmpl.h     ${PROJECT_BINARY_DIR}/lib/volk_gnsssdr_machines.h)
gen_template(${PROJECT_SOURCE_DIR}/tmpl/volk_gnsssdr_machines.tmpl.c     ${PROJECT_BINARY_DIR}/lib/volk_gnsssdr_machines.c)

set(BASE_CFLAGS NONE)
string(TOUPPER ${CMAKE_BUILD_TYPE} CBTU)
message(STATUS "BUILD TYPE = ${CBTU}")
message(STATUS "Base cflags = ${CMAKE_C_FLAGS_${CBTU}} ${CMAKE_C_FLAGS}")
set(COMPILER_INFO "")
if(MSVC)
    if(MSVC90)   # Visual Studio 9
        set(cmake_c_compiler_version "Microsoft Visual Studio 9.0")
    elseif(MSVC10) # Visual Studio 10
        set(cmake_c_compiler_version "Microsoft Visual Studio 10.0")
    elseif(MSVC11) # Visual Studio 11
        set(cmake_c_compiler_version "Microsoft Visual Studio 11.0")
    elseif(MSVC12) # Visual Studio 12
        set(cmake_c_compiler_version "Microsoft Visual Studio 12.0")
    elseif(MSVC14) # Visual Studio 14
        set(cmake_c_compiler_version "Microsoft Visual Studio 14.0")
    endif()
else()
    execute_process(COMMAND ${CMAKE_C_COMPILER} --version
        OUTPUT_VARIABLE cmake_c_compiler_version
    )
endif()
if(NOT GRCBTU)
    set(GRCBTU "")
endif()
set(COMPILER_INFO "${CMAKE_C_COMPILER}:::${CMAKE_C_FLAGS_${GRCBTU}} ${CMAKE_C_FLAGS}\n${CMAKE_CXX_COMPILER}:::${CMAKE_CXX_FLAGS_${GRCBTU}} ${CMAKE_CXX_FLAGS}\n")

foreach(machine_name ${available_machines})
    # generate machine source
    set(machine_source ${CMAKE_CURRENT_BINARY_DIR}/volk_gnsssdr_machine_${machine_name}.c)
    gen_template(${PROJECT_SOURCE_DIR}/tmpl/volk_gnsssdr_machine_xxx.tmpl.c ${machine_source} ${machine_name})

    # determine machine flags
    execute_process(
        COMMAND ${PYTHON_EXECUTABLE} ${PYTHON_DASH_B}
        ${PROJECT_SOURCE_DIR}/gen/volk_gnsssdr_compile_utils.py
        --mode "machine_flags" --machine "${machine_name}" --compiler "${COMPILER_NAME}"
        OUTPUT_VARIABLE ${machine_name}_flags OUTPUT_STRIP_TRAILING_WHITESPACE
    )
    if(NOT (CMAKE_GENERATOR STREQUAL Xcode))
        message(STATUS "BUILD INFO ::: ${machine_name} ::: ${COMPILER_NAME} ::: ${CMAKE_C_FLAGS_${CBTU}} ${CMAKE_C_FLAGS} ${${machine_name}_flags}")
    endif()
    set(COMPILER_INFO "${COMPILER_INFO}${machine_name}:::${COMPILER_NAME}:::${CMAKE_C_FLAGS_${CBTU}} ${CMAKE_C_FLAGS} ${${machine_name}_flags}\n")
    if(${machine_name}_flags AND NOT MSVC)
        set_source_files_properties(${machine_source} PROPERTIES COMPILE_FLAGS "${${machine_name}_flags}")
    endif()

    # add to available machine defs
    string(TOUPPER LV_MACHINE_${machine_name} machine_def)
    list(APPEND machine_defs ${machine_def})
endforeach()

# Convert to a C string to compile and display properly
string(STRIP "${cmake_c_compiler_version}" cmake_c_compiler_version)
string(STRIP ${COMPILER_INFO} COMPILER_INFO)
message(STATUS "Compiler Version: ${cmake_c_compiler_version}")
string(REPLACE "\n" " \\n" cmake_c_compiler_version ${cmake_c_compiler_version})
string(REPLACE "\n" " \\n" COMPILER_INFO ${COMPILER_INFO})


########################################################################
# Handle ASM support
#  on by default, but let users turn it off
########################################################################
if(${CMAKE_VERSION} VERSION_GREATER "2.8.9")
    set(ASM_ARCHS_AVAILABLE "neonv7" "neonv8")

    set(FULL_C_FLAGS "${CMAKE_C_FLAGS}" "${CMAKE_CXX_COMPILER_ARG1}")

    # sort through a list of all architectures we have ASM for
    # if we find one that matches our current system architecture
    # set up the assembler flags and include the source files
    foreach(ARCH ${ASM_ARCHS_AVAILABLE})
        string(REGEX MATCH "${ARCH}" ASM_ARCH "${available_archs}")
        if(ASM_ARCH STREQUAL "neonv7")
            message(STATUS "---- Adding ASM files") # we always use ATT syntax
            message(STATUS "-- Detected neon architecture; enabling ASM")
            # architecture specific assembler flags are now set in the cmake toolchain file
            # then add the files
            include_directories(${PROJECT_SOURCE_DIR}/kernels/volk_gnsssdr/asm/neon)
            file(GLOB asm_files ${PROJECT_SOURCE_DIR}/kernels/volk_gnsssdr/asm/neon/*.s)
            list(SORT asm_files)
            foreach(asm_file ${asm_files})
                list(APPEND volk_gnsssdr_sources ${asm_file})
                message(STATUS "Adding source file: ${asm_file}")
            endforeach()
        endif()
        enable_language(ASM)
        message(STATUS "c flags: ${FULL_C_FLAGS}")
        message(STATUS "asm flags: ${CMAKE_ASM_FLAGS}")
    endforeach()

else()
    message(STATUS "Not enabling ASM support. CMake >= 2.8.10 required.")
    foreach(machine_name ${available_machines})
        string(REGEX MATCH "neon" NEON_MACHINE ${machine_name})
        if(NEON_MACHINE STREQUAL "neon")
            message(FATAL_ERROR "CMake >= 2.8.10 is required for ARM NEON support")
        endif()
    endforeach()
endif()

########################################################################
# Handle orc support
########################################################################
if(ORC_FOUND)
    # setup orc library usage
    include_directories(${ORC_INCLUDE_DIRS})
    link_directories(${ORC_LIBRARY_DIRS})
    list(APPEND volk_gnsssdr_libraries ${ORC_LIBRARIES})

    # setup orc functions
    file(GLOB orc_files ${PROJECT_SOURCE_DIR}/kernels/volk_gnsssdr/asm/orc/*.orc)
    list(SORT orc_files)
    foreach(orc_file ${orc_files})
        # extract the name for the generated c source from the orc file
        get_filename_component(orc_file_name_we ${orc_file} NAME_WE)
        set(orcc_gen ${CMAKE_CURRENT_BINARY_DIR}/${orc_file_name_we}.c)

        # create a rule to generate the source and add to the list of sources
        add_custom_command(
            COMMAND ${ORCC_EXECUTABLE} --include math.h --implementation -o ${orcc_gen} ${orc_file}
            DEPENDS ${orc_file} OUTPUT ${orcc_gen}
        )
        list(APPEND volk_gnsssdr_sources ${orcc_gen})
    endforeach()
else()
    message(STATUS "Did not find liborc and orcc, disabling orc support...")
endif()

########################################################################
# Handle the generated constants
########################################################################

message(STATUS "Loading version ${VERSION} into constants...")

# double escape for windows backslash path separators
string(REPLACE "\\" "\\\\" prefix "${prefix}")

configure_file(
    ${CMAKE_CURRENT_SOURCE_DIR}/constants.c.in
    ${CMAKE_CURRENT_BINARY_DIR}/constants.c
    @ONLY
)

list(APPEND volk_gnsssdr_sources ${CMAKE_CURRENT_BINARY_DIR}/constants.c)

########################################################################
# Setup the volk_gnsssdr sources list and library
########################################################################
if(NOT WIN32)
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fvisibility=hidden")
    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fvisibility=hidden")
endif()

list(APPEND volk_gnsssdr_sources
    ${CMAKE_CURRENT_SOURCE_DIR}/volk_gnsssdr_prefs.c
    ${CMAKE_CURRENT_SOURCE_DIR}/volk_gnsssdr_rank_archs.c
    ${CMAKE_CURRENT_SOURCE_DIR}/volk_gnsssdr_malloc.c
    ${volk_gnsssdr_gen_sources}
)

# set the machine definitions where applicable
set_source_files_properties(
    ${CMAKE_CURRENT_BINARY_DIR}/volk_gnsssdr.c
    ${CMAKE_CURRENT_BINARY_DIR}/volk_gnsssdr_machines.c
    PROPERTIES COMPILE_DEFINITIONS "${machine_defs}"
)

if(MSVC)
    # add compatibility includes for stdint types
    include_directories(${PROJECT_SOURCE_DIR}/cmake/msvc)
    add_definitions(-DHAVE_CONFIG_H)
    # compile the sources as C++ due to the lack of complex.h under MSVC
    set_source_files_properties(${volk_gnsssdr_sources} PROPERTIES LANGUAGE CXX)
endif()

# Create a volk_gnsssdr object library
if(NOT (CMAKE_GENERATOR STREQUAL Xcode))
    add_library(volk_gnsssdr_obj OBJECT ${volk_gnsssdr_sources})
    target_include_directories(volk_gnsssdr_obj
        PRIVATE $<BUILD_INTERFACE:${PROJECT_BINARY_DIR}/include>
        PRIVATE $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>
        PRIVATE $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/kernels>
        PRIVATE ${CMAKE_CURRENT_BINARY_DIR}
        PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
    )
    if(USE_CPU_FEATURES)
        target_include_directories(volk_gnsssdr_obj
            PRIVATE
                $<TARGET_PROPERTY:cpu_features,INTERFACE_INCLUDE_DIRECTORIES>
        )
    endif()
    # Configure object target properties
    if(NOT MSVC)
        set_target_properties(volk_gnsssdr_obj PROPERTIES COMPILE_FLAGS "-fPIC")
    endif()
endif()

# Add dynamic library
if(CMAKE_GENERATOR STREQUAL Xcode)
    add_library(volk_gnsssdr SHARED ${volk_gnsssdr_sources})
else()
    add_library(volk_gnsssdr SHARED $<TARGET_OBJECTS:volk_gnsssdr_obj>)
endif()
if(USE_CPU_FEATURES)
    target_link_libraries(volk_gnsssdr
        PRIVATE ${volk_gnsssdr_libraries} cpu_features
    )
else()
    target_link_libraries(volk_gnsssdr PUBLIC ${volk_gnsssdr_libraries})
endif()
target_include_directories(volk_gnsssdr
    PUBLIC $<BUILD_INTERFACE:${PROJECT_BINARY_DIR}/include>
    PUBLIC $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>
    PUBLIC $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/kernels>
    PRIVATE ${CMAKE_CURRENT_BINARY_DIR}
    PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
    PUBLIC $<INSTALL_INTERFACE:include>
)
if(USE_CPU_FEATURES)
    target_include_directories(volk_gnsssdr
        PRIVATE
            $<TARGET_PROPERTY:cpu_features,INTERFACE_INCLUDE_DIRECTORIES>
    )
endif()
# Configure target properties
if(NOT MSVC)
    target_link_libraries(volk_gnsssdr PUBLIC m)
endif()
set_target_properties(volk_gnsssdr PROPERTIES SOVERSION ${LIBVER})
set_target_properties(volk_gnsssdr PROPERTIES DEFINE_SYMBOL "volk_gnsssdr_EXPORTS")

# Install locations
install(TARGETS volk_gnsssdr
    EXPORT VOLK_GNSSSDR-export
    LIBRARY DESTINATION lib${LIB_SUFFIX} COMPONENT "volk_gnsssdr_runtime" # .so file
    ARCHIVE DESTINATION lib${LIB_SUFFIX} COMPONENT "volk_gnsssdr_devel"   # .lib file
    RUNTIME DESTINATION bin              COMPONENT "volk_gnsssdr_runtime" # .dll file
)

# Configure static library
if(ENABLE_STATIC_LIBS)
    if(CMAKE_GENERATOR STREQUAL Xcode)
        add_library(volk_gnsssdr_static STATIC ${volk_gnsssdr_sources})
    else()
        add_library(volk_gnsssdr_static STATIC $<TARGET_OBJECTS:volk_gnsssdr_obj>)
    endif()
    if(USE_CPU_FEATURES)
        target_link_libraries(volk_gnsssdr_static
            PRIVATE cpu_features
        )
    endif()
    target_link_libraries(volk_gnsssdr_static PUBLIC ${volk_gnsssdr_libraries} pthread)
    if(NOT MSVC)
        target_link_libraries(volk_gnsssdr_static PUBLIC m)
    endif()
    target_include_directories(volk_gnsssdr_static
        PUBLIC $<BUILD_INTERFACE:${PROJECT_BINARY_DIR}/include>
        PUBLIC $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>
        PUBLIC $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/kernels>
        PUBLIC $<INSTALL_INTERFACE:include>
        PRIVATE ${CMAKE_CURRENT_BINARY_DIR}
        PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
    )
    if(USE_CPU_FEATURES)
        target_include_directories(volk_gnsssdr_static
            PRIVATE
                $<TARGET_PROPERTY:cpu_features,INTERFACE_INCLUDE_DIRECTORIES>
        )
    endif()

    set_target_properties(volk_gnsssdr_static PROPERTIES OUTPUT_NAME volk_gnsssdr)

    install(TARGETS volk_gnsssdr_static
        EXPORT VOLK_GNSSSDR-export
        ARCHIVE DESTINATION lib${LIB_SUFFIX} COMPONENT "volk_gnsssdr_devel"
    )
endif()

########################################################################
# Build the QA test application
########################################################################
if(ENABLE_TESTING)
    file(MAKE_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/.unittest)

    include(VolkAddTest)
    volk_gen_test(volk_gnsssdr_test_all
        SOURCES ${CMAKE_CURRENT_SOURCE_DIR}/testqa.cc
        ${CMAKE_CURRENT_SOURCE_DIR}/qa_utils.cc
        TARGET_DEPS volk_gnsssdr
    )

    foreach(kernel ${h_files})
        get_filename_component(kernel ${kernel} NAME)
        string(REPLACE ".h" "" kernel ${kernel})
        volk_add_test(${kernel} volk_gnsssdr_test_all)
    endforeach()
endif()