src/CMakeLists.txt

set( LIB_NAME_BASE oapv )

set( LIB_SOVERSION 1)

file (GLOB LIB_INC "../inc/*.h")
file (GLOB LIB_API_SRC "oapv.c")
file (GLOB LIB_BASE_SRC "oapv_*.c")
file (GLOB LIB_BASE_INC "oapv_*.h" )
file (GLOB LIB_SSE_SRC "../src/sse/oapv_*.c")
file (GLOB LIB_SSE_INC "../src/sse/oapv_*.h" )
file (GLOB LIB_NEON_SRC "../src/neon/oapv_*.c")
file (GLOB LIB_NEON_INC "../src/neon/oapv_*.h" )
file (GLOB LIB_AVX_SRC "../src/avx/oapv_*.c")
file (GLOB LIB_AVX_INC "../src/avx/oapv_*.h" )

include(GenerateExportHeader)
include_directories("${CMAKE_BINARY_DIR}/include")

message("SYSTEM_PROCESSOR=${CMAKE_SYSTEM_PROCESSOR}")

if(${CMAKE_SYSTEM_PROCESSOR} MATCHES "^(arm|aarch)")
  message("  ARM processor")
  #  add_definitions (-mfloat-abi=softfp -mfpu=neon)
  add_definitions(-DARM=1)
  set(ARM "TRUE")
elseif(${CMAKE_SYSTEM_PROCESSOR} MATCHES "^(x86|ia64|i386|i686)")
  message("  X86 processor")
  add_definitions(-DX86=1)
  set(X86 "TRUE")
endif()

if( ${CMAKE_SYSTEM_PROCESSOR} MATCHES "64" )
  message("  64-bit")
  add_compile_definitions( _IS64BIT)
endif()

if(ARM)
  add_library( ${LIB_NAME_BASE} STATIC ${LIB_API_SRC} ${LIB_INC} ${LIB_BASE_SRC} ${LIB_BASE_INC}
                                      ${LIB_NEON_SRC} ${LIB_NEON_INC} )
  add_library( ${LIB_NAME_BASE}_dynamic SHARED ${LIB_API_SRC} ${LIB_INC} ${LIB_BASE_SRC} ${LIB_BASE_INC}
                                              ${LIB_NEON_SRC} ${LIB_NEON_INC} )
else()
  add_library( ${LIB_NAME_BASE} STATIC ${LIB_API_SRC} ${LIB_INC} ${LIB_BASE_SRC} ${LIB_BASE_INC} ${LIB_SSE_SRC} ${LIB_SSE_INC}
                                      ${LIB_AVX_SRC} ${LIB_AVX_INC} )
  add_library( ${LIB_NAME_BASE}_dynamic SHARED ${LIB_API_SRC} ${LIB_INC} ${LIB_BASE_SRC} ${LIB_BASE_INC} ${LIB_SSE_SRC} ${LIB_SSE_INC}
                                              ${LIB_AVX_SRC} ${LIB_AVX_INC} )
endif()

set_target_properties(${LIB_NAME_BASE}_dynamic PROPERTIES VERSION ${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR} SOVERSION ${LIB_SOVERSION})

# @todo Consider using WINDOWS_EXPORT_ALL_SYMBOLS instead of generate_export_header
# @see https://cmake.org/cmake/help/latest/prop_tgt/WINDOWS_EXPORT_ALL_SYMBOLS.html#prop_tgt:WINDOWS_EXPORT_ALL_SYMBOLS
#if(MSVC)
    # @see https://blog.kitware.com/create-dlls-on-windows-without-declspec-using-new-cmake-export-all-feature/
    # @see https://cmake.org/cmake/help/v3.3/module/GenerateExportHeader.html
    #
    #set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS TRUE)
    #set(BUILD_SHARED_LIBS TRUE)
#endif()

# Generate export macros for libraries
generate_export_header(${LIB_NAME_BASE}_dynamic
                       BASE_NAME OAPV
                       EXPORT_FILE_NAME ${CMAKE_BINARY_DIR}/include/oapv/oapv_exports.h)

# This will cause the export macros to expand to nothing when building the static library.
set_target_properties(${LIB_NAME_BASE} PROPERTIES COMPILE_FLAGS -DLIBSHARED_AND_STATIC_STATIC_DEFINE)

source_group("base\\header" FILES ${LIB_BASE_INC} ${LIB_INC})
source_group("base\\source" FILES ${LIB_BASE_SRC} ${LIB_API_SRC})
source_group("base\\sse\\header" FILES ${LIB_SSE_INC})
source_group("base\\sse\\source" FILES ${LIB_SSE_SRC})
source_group("base\\neon\\header" FILES ${LIB_NEON_INC})
source_group("base\\neon\\source" FILES ${LIB_NEON_SRC})
source_group("base\\avx\\header" FILES ${LIB_AVX_INC})
source_group("base\\avx\\source" FILES ${LIB_AVX_SRC})


if(ARM)
  include_directories( ${LIB_NAME_BASE} PUBLIC . .. ../inc ./neon)
else()
  include_directories( ${LIB_NAME_BASE} PUBLIC . .. ../inc ./sse ./avx)
endif()

set_target_properties(${LIB_NAME_BASE} PROPERTIES FOLDER lib
                                                  ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)

set( SSE ${BASE_INC_FILES} ${LIB_SSE_SRC})
set( AVX ${LIB_AVX_SRC} )
set( NEON ${LIB_NEON_SRC} ${LIB_NEON_INC})
set_target_properties(${LIB_NAME_BASE}_dynamic PROPERTIES OUTPUT_NAME ${LIB_NAME_BASE})

if( MSVC )
  target_compile_definitions( ${LIB_NAME_BASE} PUBLIC ANY _CRT_SECURE_NO_WARNINGS )
  set_target_properties(${LIB_NAME_BASE}_dynamic PROPERTIES FOLDER lib
                                                            RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
elseif( UNIX OR MINGW )

  if (ARM)
    set_property( SOURCE ${NEON} APPEND PROPERTY COMPILE_FLAGS "-flax-vector-conversions" )
  else()
    set_property( SOURCE ${SSE} APPEND PROPERTY COMPILE_FLAGS "-msse4.1" )
    set_property( SOURCE ${AVX} APPEND PROPERTY COMPILE_FLAGS " -mavx2" )
  endif()

  set_target_properties(${LIB_NAME_BASE}_dynamic PROPERTIES FOLDER lib
                                                            LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
  target_compile_definitions( ${LIB_NAME_BASE} PUBLIC ANY LINUX )
  target_link_libraries(${LIB_NAME_BASE} m)
endif()

# Install rules
#
# Set DCMAKE_INSTALL_PREFIX to change default install prefix
# e.g cmake .. -DSET_PROF=BASE -DCMAKE_INSTALL_PREFIX='/home/user/bin/'

# List the headers we want to declare as public for installation.
set(OAPV_PUBLIC_HEADERS "${LIB_INC}")
set_target_properties(${LIB_NAME_BASE} PROPERTIES PUBLIC_HEADER "${OAPV_PUBLIC_HEADERS}")

set(OAPV_PRIVATE_HEADERS "${LIB_BASE_INC}" "${LIB_SSE_INC}" "${LIB_AVX_INC}" "${LIB_NEON_INC}")

# Install static library and public headers
#
# Static library (liboapv.a or oapv.lib) will be installed to <prefix>/lib/oapv
# Public headers will be installed to <prefix>/include/oapv
#
include(GNUInstallDirs)
install(TARGETS ${LIB_NAME_BASE}
        ARCHIVE COMPONENT Development DESTINATION ${CMAKE_INSTALL_LIBDIR}/${LIB_NAME_BASE}
        PUBLIC_HEADER COMPONENT Development DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/${LIB_NAME_BASE}
)

# Install shared library
#
# On non-DLL platforms shared library (liboapv.so) will be installed to <prefix>/lib/oapv.
# On DLL platforms the shred DLL (oapv.dll) will be installed to <prefix>/bin and its import library will be installed to <prefix>/lib/oapv/import
#
install(TARGETS ${LIB_NAME_BASE}_dynamic
        RUNTIME COMPONENT Libraries DESTINATION ${CMAKE_INSTALL_BINDIR}
        LIBRARY
            COMPONENT Libraries DESTINATION ${CMAKE_INSTALL_LIBDIR}
            NAMELINK_COMPONENT Development DESTINATION ${CMAKE_INSTALL_LIBDIR}
        ARCHIVE COMPONENT Development DESTINATION ${CMAKE_INSTALL_LIBDIR}/${LIB_NAME_BASE}/import
)

install( FILES
    ${PROJECT_BINARY_DIR}/include/oapv/oapv_exports.h DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/${LIB_NAME_BASE}
)

if( NOT MSVC )
    configure_file(
        "${CMAKE_SOURCE_DIR}/pkgconfig/${LIB_NAME_BASE}.pc.in"
        "${CMAKE_BINARY_DIR}/${LIB_NAME_BASE}.pc"
        IMMEDIATE @ONLY)

    install( FILES
        "${CMAKE_BINARY_DIR}/${LIB_NAME_BASE}.pc" DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig
    )
endif()