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project(unitybuild_cxx CXX)
set(srcs "")
foreach(s RANGE 1 4)
set(src "${CMAKE_CURRENT_BINARY_DIR}/s${s}.cxx")
file(WRITE "${src}" "int s${s}(void) { return 0; }\n")
list(APPEND srcs "${src}")
endforeach()
foreach(s RANGE 1 2)
set(src "${CMAKE_CURRENT_BINARY_DIR}/odr${s}.cxx")
file(WRITE "${src}" "namespace odr { int s${s}(void) { return 0; } }\n")
list(APPEND srcs "${src}")
endforeach()
add_library(tgt SHARED ${srcs})
set_target_properties(tgt PROPERTIES UNITY_BUILD ON
UNITY_BUILD_MODE GROUP
)
set_source_files_properties(s1.cxx s2.cxx odr1.cxx
PROPERTIES UNITY_GROUP "a"
)
set_source_files_properties(s3.cxx s4.cxx odr2.cxx
PROPERTIES UNITY_GROUP "b"
)
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