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set(dir ${CMAKE_CURRENT_SOURCE_DIR})
set(tarball ${dir}/SrcSymlinks-0.1-Source.tar.gz)
set(extrdir ${dir}/SrcSymlinks-0.1-Source)
message(STATUS "Extracting ${tarball} in ${dir}...")
execute_process(COMMAND ${CMAKE_COMMAND} -E tar xvf ${tarball}
RESULT_VARIABLE result
OUTPUT_VARIABLE output
ERROR_VARIABLE output
WORKING_DIRECTORY ${dir})
message(STATUS "result='${result}'")
message(STATUS "output='${output}'")
if(NOT ${result} EQUAL 0)
message(FATAL_ERROR "Cannot unpack source tarball")
endif()
if(NOT EXISTS ${extrdir}/dirlink/src.h)
message(FATAL_ERROR "${extrdir}/dirlink/src.h not found")
endif()