cmake_minimum_required(VERSION 2.8)

project(libsrtp-download NONE)


SET(CONFIGURE_COMMAND "")
SET(PATCH_COMMAND "")

# There is known bug in libsrtp where cross compiling using configure on ARM fails. Do not
# enable this option if cross compilng on ARM
# Check https://github.com/cisco/libsrtp/pull/496
if(BUILD_LIBSRTP_DESTINATION_PLATFORM STREQUAL BUILD_LIBSRTP_HOST_PLATFORM)
  if(UNIX OR APPLE)
    if(USE_OPENSSL)
      SET(CONFIGURE_COMMAND ${CMAKE_CURRENT_BINARY_DIR}/build/src/project_libsrtp/configure "CFLAGS=${CMAKE_C_FLAGS}" --prefix=${OPEN_SRC_INSTALL_PREFIX}  --enable-openssl --with-openssl-dir=${OPENSSL_DIR})
    else()
      SET(CONFIGURE_COMMAND ${CMAKE_CURRENT_BINARY_DIR}/build/src/project_libsrtp/configure "CFLAGS=${CMAKE_C_FLAGS}" --prefix=${OPEN_SRC_INSTALL_PREFIX})
    endif()

    if (DEFINED BUILD_LIBSRTP_DESTINATION_PLATFORM AND NOT BUILD_LIBSRTP_DESTINATION_PLATFORM STREQUAL OFF)
      set(CONFIGURE_COMMAND ${CONFIGURE_COMMAND} --host=${BUILD_LIBSRTP_DESTINATION_PLATFORM})
    endif()

    if (DEFINED BUILD_LIBSRTP_HOST_PLATFORM AND NOT BUILD_LIBSRTP_HOST_PLATFORM STREQUAL OFF)
      set(CONFIGURE_COMMAND ${CONFIGURE_COMMAND} --build=${BUILD_LIBSRTP_HOST_PLATFORM})
    endif()

    if (DEFINED CMAKE_OSX_SYSROOT AND NOT CMAKE_OSX_SYSROOT STREQUAL "")
      set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -isysroot${CMAKE_OSX_SYSROOT}")
    endif()
  endif()
endif()

if (BUILD_STATIC_LIBS OR WIN32)
  set(LIBSRTP_SHARED_LIBS OFF)
else()
  set(LIBSRTP_SHARED_LIBS ON)
endif()

if (NOT WIN32)
    set(PATCH_COMMAND ${PATCH_COMMAND} git apply --ignore-whitespace ${CMAKE_SOURCE_DIR}/../../CMake/Dependencies/libsrtp-gcc-10_bit_string.patch)
endif()

if (USE_OPENSSL)
  set(LIBSRTP_ENABLE_OPENSSL ON)
else()
  set(LIBSRTP_ENABLE_OPENSSL OFF)
endif()


include(ExternalProject)
ExternalProject_Add(project_libsrtp
    GIT_REPOSITORY    https://github.com/cisco/libsrtp.git
    GIT_TAG           v2.3.0
    PATCH_COMMAND     ${PATCH_COMMAND}
    PREFIX            ${CMAKE_CURRENT_BINARY_DIR}/build
    CMAKE_ARGS        -D CMAKE_BUILD_TYPE:STRING=${CMAKE_BUILD_TYPE}
                      -D CMAKE_INSTALL_PREFIX:STRING=${OPEN_SRC_INSTALL_PREFIX}
                      -D ENABLE_OPENSSL=${LIBSRTP_ENABLE_OPENSSL}
                      -D BUILD_SHARED_LIBS=${LIBSRTP_SHARED_LIBS}
                      -D OPENSSL_ROOT_DIR=${OPEN_SRC_INSTALL_PREFIX}
    CONFIGURE_COMMAND ${CONFIGURE_COMMAND}
    TEST_COMMAND      ""
)