External_libuuid.cmake.in

cmake_minimum_required(VERSION 2.8.2)

project(libuuid-download NONE)
include(ExternalProject)

set(EP_SOURCE_DIR ${CMAKE_BINARY_DIR}/libuuid-src)
set(EP_BINARY_DIR ${CMAKE_BINARY_DIR}/libuuid-src)
set(EP_INSTALL_DIR ${CMAKE_INSTALL_PREFIX})

set(libuuid_major_minor 2.32)
set(libuuid_version "${libuuid_major_minor}.1")
set(libuuid_URL "https://mirrors.edge.kernel.org/pub/linux/utils/util-linux/v${libuuid_major_minor}/util-linux-${libuuid_version}.tar.gz")
set(libuuid_SHA256 3bbf9f3d4a33d6653cf0f7e4fc422091b6a38c3b1195c0ee716c67148a1a7122)

include(ProcessorCount)
ProcessorCount(CPU_COUNT)
if(CPU_COUNT EQUAL 0)
  set(CPU_COUNT 2)
endif()

ExternalProject_Add(libuuid
    URL ${libuuid_URL}
    URL_HASH SHA256=${libuuid_SHA256}
    SOURCE_DIR ${EP_SOURCE_DIR}
    BINARY_DIR ${EP_BINARY_DIR}
    INSTALL_DIR ${EP_INSTALL_DIR}
    CONFIGURE_COMMAND CFLAGS=-fPIC bash configure --disable-all-programs --enable-libuuid
    BUILD_COMMAND make -j ${CPU_COUNT}
    # On some platforms:
    # - If `DESTDIR` is not specified with the install command, libuuid will be
    # installed in a system prefix.
    # - If `DESTDIR` is specified and `prefix` is not, the makefile inserts a
    # `usr` in the library install path.
    # - If `DESTDIR` and `prefix` are both set to the installation prefix, the
    # header install path is a concatenation of `DESTDIR` and `prefix`,
    # repeating the installation prefix.
    #
    # The solution appears to set `prefix` to an empty string and `DESTDIR` to
    # the installation prefix.
    INSTALL_COMMAND make install prefix="" DESTDIR=${EP_INSTALL_DIR}
)