/usr/share/cmake-3.10/Modules/Compiler/Clang-C.cmake is in cmake-data 3.10.2-1ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 | include(Compiler/Clang)
__compiler_clang(C)
cmake_policy(GET CMP0025 appleClangPolicy)
if(APPLE AND NOT appleClangPolicy STREQUAL NEW)
return()
endif()
if(NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 3.4)
if(NOT "x${CMAKE_C_SIMULATE_ID}" STREQUAL "xMSVC")
set(CMAKE_C90_STANDARD_COMPILE_OPTION "-std=c90")
set(CMAKE_C90_EXTENSION_COMPILE_OPTION "-std=gnu90")
set(CMAKE_C99_STANDARD_COMPILE_OPTION "-std=c99")
set(CMAKE_C99_EXTENSION_COMPILE_OPTION "-std=gnu99")
set(CMAKE_C11_STANDARD_COMPILE_OPTION "-std=c11")
set(CMAKE_C11_EXTENSION_COMPILE_OPTION "-std=gnu11")
else()
# clang-cl doesn't have any of these
set(CMAKE_C90_STANDARD_COMPILE_OPTION "")
set(CMAKE_C90_EXTENSION_COMPILE_OPTION "")
set(CMAKE_C99_STANDARD_COMPILE_OPTION "")
set(CMAKE_C99_EXTENSION_COMPILE_OPTION "")
set(CMAKE_C11_STANDARD_COMPILE_OPTION "")
set(CMAKE_C11_EXTENSION_COMPILE_OPTION "")
endif()
endif()
if(NOT "x${CMAKE_C_SIMULATE_ID}" STREQUAL "xMSVC")
__compiler_check_default_language_standard(C 3.4 99 3.6 11)
else()
set(CMAKE_C_STANDARD_DEFAULT "")
endif()
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