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cmake_minimum_required(VERSION 3.8)
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project(CheckIPOSupported-C LANGUAGES C)
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cmake_policy(SET CMP0069 NEW)
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include(CheckIPOSupported)
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check_ipo_supported(RESULT ipo_supported OUTPUT ipo_output)
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if(ipo_supported)
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set(CMAKE_INTERPROCEDURAL_OPTIMIZATION TRUE)
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elseif(CMake_TEST_IPO_WORKS_C)
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string(REPLACE "\n" "\n " ipo_output "${ipo_output}")
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message(FATAL_ERROR "IPO expected to work, but the check failed:\n ${ipo_output}")
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endif()
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add_library(foo foo.c)
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add_executable(CheckIPOSupported-C main.c)
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target_link_libraries(CheckIPOSupported-C PUBLIC foo)
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enable_testing()
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add_test(NAME CheckIPOSupported-C COMMAND CheckIPOSupported-C)
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