CMakeLists.txt

cmake_minimum_required(VERSION 3.4)
project(libssh2lv VERSION 0.2.3 LANGUAGES C)
set(PROJECT_URL "https://github.com/fieldrndservices/libssh2lv")
set(PROJECT_DESCRIPTION "A LabVIEW-Friendly C library for LIBSSH2")

include(ExternalProject)

set(CMAKE_C_VISIBILITY_PRESET hidden)
set(OPENSSL "openssl")
set(LIBSSH2 "libssh2")
set(UNIX_LIBRARY_NAME "ssh2lv")
set(WINDOWS_LIBRARY_NAME "libssh2lv")

set(ABI_MAJOR_VERSION "1")
set(ABI_MINOR_VERSION "0")
set(ABI_PATCH_VERSION "0")
set(ABI_VERSION "${ABI_MAJOR_VERSION}.${ABI_MINOR_VERSION}.${ABI_PATCH_VERSION}")

set(OPENSSL_BINARY_DIR "/usr/lib" CACHE PATH "The path to the folder containing the OpenSSL static library")
set(LIBSSH2_ARCHIVE_DIR "/usr/lib" CACHE PATH "The path to the folder containing the libssh2 static library")
set(LIBSSH2_INCLUDE_DIR "/usr/include" CACHE PATH "The path to the folder containing the libssh2 header files")

option(BUILD_TESTS "Build test programs" OFF)
option(BUILD_DEPS "Automatically download and manage the dependencies for this project" ON)

# First for the generic no-config case (e.g. with mingw)
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
# Second, for multi-config builds (e.g. msvc)
foreach(OUTPUT_CONFIG ${CMAKE_CONFIGURATION_TYPES})
  string(TOUPPER ${OUTPUT_CONFIG} OUTPUT_CONFIG)
  set(CMAKE_RUNTIME_OUTPUT_DIRECTORY_${OUTPUT_CONFIG} ${CMAKE_BINARY_DIR}/bin)
  set(CMAKE_LIBRARY_OUTPUT_DIRECTORY_${OUTPUT_CONFIG} ${CMAKE_BINARY_DIR}/bin)
  set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY_${OUTPUT_CONFIG} ${CMAKE_BINARY_DIR}/bin)
endforeach(OUTPUT_CONFIG CMAKE_CONFIGURATION_TYPES)

if(WIN32)
  if("${CMAKE_GENERATOR_PLATFORM}" MATCHES "(Win64|IA64|x64)")
    set(DEPS_DIR ${PROJECT_SOURCE_DIR}/.deps/x64)
    set(OUTPUT_NAME "${WINDOWS_LIBRARY_NAME}-x64")
    set(OPENSSL_CONFIGURE_COMMAND perl ./Configure VC-WIN64A no-shared no-asm no-stdio)
    set(LIBSSH2_CMAKE_GENERATOR "Visual Studio 16 2019")
    set(LIBSSH2_CMAKE_GENERATOR_PLATFORM "x64")
  else()
    set(DEPS_DIR ${PROJECT_SOURCE_DIR}/.deps/x86)
    set(OUTPUT_NAME ${WINDOWS_LIBRARY_NAME})
    set(OPENSSL_CONFIGURE_COMMAND perl ./Configure VC-WIN32 no-shared no-asm no-stdio)
    set(LIBSSH2_CMAKE_GENERATOR "Visual Studio 16 2019")
    set(LIBSSH2_CMAKE_GENERATOR_PLATFORM "Win32")
  endif()
  set(OPENSSL_BUILD_COMMAND nmake)
else()
  set(DEPS_DIR ${PROJECT_SOURCE_DIR}/.deps)
  set(OPENSSL_CONFIGURE_COMMAND ./config no-shared no-stdio)
  set(OPENSSL_BUILD_COMMAND ${MAKE})
  set(OUTPUT_NAME ${UNIX_LIBRARY_NAME})
endif()

if(BUILD_DEPS)
  externalproject_add(
    ${OPENSSL}
    PREFIX ${DEPS_DIR}/${OPENSSL}
    GIT_REPOSITORY https://github.com/openssl/openssl.git
    GIT_TAG openssl-3.0.1
    UPDATE_DISCONNECTED YES
    UPDATE_COMMAND ""
    CONFIGURE_COMMAND ${OPENSSL_CONFIGURE_COMMAND}
    BUILD_IN_SOURCE YES
    BUILD_COMMAND ${OPENSSL_BUILD_COMMAND}
    TEST_COMMAND ""
    INSTALL_COMMAND ""
  )

  externalproject_get_property(${OPENSSL} BINARY_DIR)
  set(OPENSSL_BINARY_DIR ${BINARY_DIR})

  externalproject_add(
    ${LIBSSH2}
    PREFIX ${DEPS_DIR}/${LIBSSH2}
    DEPENDS ${OPENSSL}
    GIT_REPOSITORY https://github.com/libssh2/libssh2.git
    GIT_TAG libssh2-1.10.0
    UPDATE_DISCONNECTED YES
    UPDATE_COMMAND ""
    CMAKE_GENERATOR ${LIBSSH2_CMAKE_GENERATOR}
    CMAKE_GENERATOR_PLATFORM ${LIBSSH2_CMAKE_GENERATOR_PLATFORM}
    CMAKE_ARGS -DBUILD_SHARED_LIBS=OFF -DBUILD_EXAMPLES=OFF -DBUILD_TESTING=OFF -DCRYPTO_BACKEND=OpenSSL -DOPENSSL_ROOT_DIR=${OPENSSL_BINARY_DIR} -DCMAKE_POSITION_INDEPENDENT_CODE=ON
    BUILD_IN_SOURCE NO
    TEST_COMMAND ""
    INSTALL_COMMAND ""
  )

  externalproject_get_property(${LIBSSH2} BINARY_DIR)
  set(LIBSSH2_BINARY_DIR ${BINARY_DIR})
  externalproject_get_property(${LIBSSH2} SOURCE_DIR)
  set(LIBSSH2_SOURCE_DIR ${SOURCE_DIR})
  set(LIBSSH2_INCLUDE_DIR ${LIBSSH2_SOURCE_DIR}/include)
  set(LIBSSH2_ARCHIVE_DIR ${LIBSSH2_BINARY_DIR}/src/$<CONFIGURATION>)
else()
  add_custom_target(${LIBSSH2})
endif()

add_definitions(
  -DVERSION="${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}.${PROJECT_VERSION_PATCH}"
  -DVERSION_MAJOR=${PROJECT_VERSION_MAJOR}
  -DVERSION_MINOR=${PROJECT_VERSION_MINOR}
  -DVERSION_PATCH=${PROJECT_VERSION_PATCH}
  -DENABLE_DEBUG_LOGGING=ON
)

add_subdirectory(src)

if(BUILD_TESTS)
  enable_testing()
  add_subdirectory(tests)
endif()