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project(${RunCMake_TEST} LANGUAGES C)
check_ipo_supported(RESULT result OUTPUT output)
string(COMPARE EQUAL "${result}" "" is_empty)
if(is_empty)
message(FATAL_ERROR "Result variable is empty")
endif()
string(COMPARE EQUAL "${result}" "YES" is_yes)
string(COMPARE EQUAL "${result}" "NO" is_no)
if(is_yes)
# Compiler supports IPO
elseif(is_no)
# Compiler doesn't support IPO, output should not be empty.
string(COMPARE EQUAL "${output}" "" is_empty)
if(is_empty)
message(FATAL_ERROR "Output is empty")
endif()
else()
message(FATAL_ERROR "Unexpected result: ${result}")
endif()
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