projects / ceph.git / blame
| Commit | Line | Data |
|---|---|---|
| 11fdf7f2 TL |
1 | # Test if compile errors are produced where necessary. |
| 2 | ||
| 20effc67 | 3 | cmake_minimum_required(VERSION 3.1...3.18) |
| 11fdf7f2 TL |
4 | |
| 5 | include(CheckCXXSourceCompiles) | |
| 6 | include(CheckCXXCompilerFlag) | |
| 7 | ||
| 8 | set(CMAKE_REQUIRED_INCLUDES ${CMAKE_CURRENT_SOURCE_DIR}/../../include) | |
| 9 | set(CMAKE_REQUIRED_FLAGS ${CXX_STANDARD_FLAG} ${PEDANTIC_COMPILE_FLAGS}) | |
| 10 | ||
| 11 | function (generate_source result fragment) | |
| 12 | set(${result} " | |
| 13 | #define FMT_HEADER_ONLY 1 | |
| 14 | #include \"fmt/format.h\" | |
| 15 | int main() { | |
| 16 | ${fragment} | |
| 17 | } | |
| 18 | " PARENT_SCOPE) | |
| 19 | endfunction () | |
| 20 | ||
| 21 | function (expect_compile code) | |
| 22 | generate_source(source "${code}") | |
| 23 | check_cxx_source_compiles("${source}" compiles) | |
| 24 | if (NOT compiles) | |
| 25 | set(error_msg "Compile error for: ${code}") | |
| 26 | endif () | |
| 27 | # Unset the CMake cache variable compiles. Otherwise the compile test will | |
| 28 | # just use cached information next time it runs. | |
| 29 | unset(compiles CACHE) | |
| 30 | if (error_msg) | |
| 31 | message(FATAL_ERROR ${error_msg}) | |
| 32 | endif () | |
| 33 | endfunction () | |
| 34 | ||
| 35 | function (expect_compile_error code) | |
| 36 | generate_source(source "${code}") | |
| 37 | check_cxx_source_compiles("${source}" compiles) | |
| 38 | if (compiles) | |
| 39 | set(error_msg "No compile error for: ${code}") | |
| 40 | endif () | |
| 41 | # Unset the CMake cache variable compiles. Otherwise the compile test will | |
| 42 | # just use cached information next time it runs. | |
| 43 | unset(compiles CACHE) | |
| 44 | if (error_msg) | |
| 45 | message(FATAL_ERROR ${error_msg}) | |
| 46 | endif () | |
| 47 | endfunction () | |
| 48 | ||
| 49 | # check if the source file skeleton compiles | |
| 50 | expect_compile("") | |
| 51 | ||
| 52 | # Formatting a wide character with a narrow format string is forbidden. | |
| 53 | expect_compile_error("fmt::format(\"{}\", L'a');") | |
| 54 | ||
| 55 | # Formatting a wide string with a narrow format string is forbidden. | |
| 56 | expect_compile_error("fmt::format(\"{}\", L\"foo\");") | |
| 57 | ||
| 58 | # Formatting a narrow string with a wide format string is forbidden because | |
| 59 | # mixing UTF-8 with UTF-16/32 can result in an invalid output. | |
| 60 | expect_compile_error("fmt::format(L\"{}\", \"foo\");") | |
| 61 | ||
| 62 | # Formatting a wide string with a narrow format string is forbidden. | |
| 63 | expect_compile_error(" | |
| 64 | struct S { | |
| 65 | operator std::string() const { return std::string(); } | |
| 66 | }; | |
| 67 | fmt::format(\"{}\", S()); | |
| 68 | ") | |
| 69 | ||
| 70 | # Make sure that compiler features detected in the header | |
| 71 | # match the features detected in CMake. | |
| 72 | if (SUPPORTS_USER_DEFINED_LITERALS) | |
| 73 | set(supports_udl 1) | |
| 74 | else () | |
| 75 | set(supports_udl 0) | |
| 76 | endif () | |
| 77 | expect_compile("#if FMT_USE_USER_DEFINED_LITERALS != ${supports_udl} | |
| 78 | # error | |
| 79 | #endif") |