| cmake_minimum_required(VERSION 3.8) |
| project(CheckIPOSupported-C LANGUAGES C) |
| |
| cmake_policy(SET CMP0069 NEW) |
| |
| include(CheckIPOSupported) |
| check_ipo_supported(RESULT ipo_supported OUTPUT ipo_output) |
| if(ipo_supported) |
| set(CMAKE_INTERPROCEDURAL_OPTIMIZATION TRUE) |
| elseif(CMake_TEST_IPO_WORKS_C) |
| string(REPLACE "\n" "\n " ipo_output "${ipo_output}") |
| message(FATAL_ERROR "IPO expected to work, but the check failed:\n ${ipo_output}") |
| endif() |
| |
| add_library(foo foo.c) |
| if(NOT CYGWIN AND (NOT WIN32 OR "x${CMAKE_C_COMPILER_ID}" STREQUAL "xClang")) |
| add_library(bar SHARED bar.c) |
| if(WIN32) |
| # Bindexplib for clang supports LTO objects |
| set_target_properties(bar PROPERTIES WINDOWS_EXPORT_ALL_SYMBOLS ON) |
| endif() |
| else() |
| # TODO: bindexplib doesn't support exporting IPO symbols with other compilers on Windows |
| add_library(bar STATIC bar.c) |
| endif() |
| add_executable(CheckIPOSupported-C main.c) |
| target_link_libraries(CheckIPOSupported-C PUBLIC foo bar) |
| |
| enable_testing() |
| add_test(NAME CheckIPOSupported-C COMMAND CheckIPOSupported-C) |
