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file(READ build.ninja build_ninja)
if("${build_ninja}" MATCHES [====[
# Unknown Build Time Dependencies.
# Tell Ninja that they may appear as side effects of build rules
# otherwise ordered by order-only dependencies.
((build [^:]*: phony [^\n]*
)*)# ========]====])
set(phony "${CMAKE_MATCH_1}")
if(NOT phony)
message(STATUS "build.ninja correctly does not have extra phony rules")
else()
string(REGEX REPLACE "\n+$" "" phony "${phony}")
string(REGEX REPLACE "\n" "\n " phony " ${phony}")
message(FATAL_ERROR "build.ninja incorrectly has extra phony rules:\n"
"${phony}")
endif()
else()
message(FATAL_ERROR "build.ninja is incorrectly missing expected block")
endif()
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