libopenssl-CMakeLists.txt

cmake_minimum_required(VERSION 3.6.3)

project(libopenssl-download NONE)

if(BUILD_OLD_OPENSSL_VERSION)
    SET(OPENSSL_GIT_TAG "OpenSSL_1_1_1t")
else()
    SET(OPENSSL_GIT_TAG "openssl-3.0.12")
endif()

if (WIN32)
  find_program(MAKE_EXE NAMES nmake)
  SET(CONFIGURE_COMMAND perl ${CMAKE_CURRENT_BINARY_DIR}/build/src/project_libopenssl/Configure VC-WIN64A no-asm --prefix=${OPEN_SRC_INSTALL_PREFIX} --openssldir=${OPEN_SRC_INSTALL_PREFIX})
else()
  find_program(MAKE_EXE NAMES make)
  # OpenSSL takes a while to compile, so allow some parallelism.
  if (DEFINED ENV{CMAKE_BUILD_PARALLEL_LEVEL})
    list(APPEND MAKE_EXE "-j$ENV{CMAKE_BUILD_PARALLEL_LEVEL}")
  endif()

  if (BUILD_STATIC_LIBS)
    SET(OPENSSL_EXTRA ${OPENSSL_EXTRA} no-shared no-dso)
  endif()

  if (DEFINED BUILD_OPENSSL_PLATFORM AND NOT BUILD_OPENSSL_PLATFORM STREQUAL OFF)
    SET(CONFIGURE_COMMAND ${CMAKE_CURRENT_BINARY_DIR}/build/src/project_libopenssl/Configure ${OPENSSL_EXTRA} no-async --prefix=${OPEN_SRC_INSTALL_PREFIX} --openssldir=${OPEN_SRC_INSTALL_PREFIX} ${BUILD_OPENSSL_PLATFORM} -Wno-nullability-completeness -Wno-expansion-to-defined)
  else()
    SET(CONFIGURE_COMMAND ${CMAKE_CURRENT_BINARY_DIR}/build/src/project_libopenssl/config ${OPENSSL_EXTRA} --prefix=${OPEN_SRC_INSTALL_PREFIX} --openssldir=${OPEN_SRC_INSTALL_PREFIX} -Wno-nullability-completeness -Wno-expansion-to-defined)
  endif()
endif()

include(ExternalProject)
ExternalProject_Add(project_libopenssl
    GIT_REPOSITORY    https://github.com/openssl/openssl.git
    GIT_TAG           ${OPENSSL_GIT_TAG}
    PREFIX            ${CMAKE_CURRENT_BINARY_DIR}/build
    CONFIGURE_COMMAND ${CONFIGURE_COMMAND}
    BUILD_COMMAND     ${MAKE_EXE}
    BUILD_IN_SOURCE   TRUE
    INSTALL_COMMAND   ${MAKE_EXE} install_sw
    TEST_COMMAND      ""
)