diff options
Diffstat (limited to 'Modules/WriteCompilerDetectionHeader.cmake')
| -rw-r--r-- | Modules/WriteCompilerDetectionHeader.cmake | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/Modules/WriteCompilerDetectionHeader.cmake b/Modules/WriteCompilerDetectionHeader.cmake index 0b16aa4..362099e 100644 --- a/Modules/WriteCompilerDetectionHeader.cmake +++ b/Modules/WriteCompilerDetectionHeader.cmake @@ -503,10 +503,19 @@ function(write_compiler_detection_header if (feature STREQUAL cxx_static_assert) set(def_value "${prefix_arg}_STATIC_ASSERT(X)") set(def_value_msg "${prefix_arg}_STATIC_ASSERT_MSG(X, MSG)") - set(static_assert_struct "template<bool> struct ${prefix_arg}StaticAssert;\ntemplate<> struct ${prefix_arg}StaticAssert<true>{};\n") - set(def_standard "# define ${def_value} static_assert(X, #X)\n# define ${def_value_msg} static_assert(X, MSG)") - set(def_alternative "${static_assert_struct}# define ${def_value} sizeof(${prefix_arg}StaticAssert<X>)\n# define ${def_value_msg} sizeof(${prefix_arg}StaticAssert<X>)") - string(APPEND file_content "# if defined(${def_name}) && ${def_name}\n${def_standard}\n# else\n${def_alternative}\n# endif\n\n") + set(def_fallback "enum { ${prefix_arg}_STATIC_ASSERT_JOIN(${prefix_arg}StaticAssertEnum, __LINE__) = sizeof(${prefix_arg}StaticAssert<X>) }") + string(APPEND file_content "# if defined(${def_name}) && ${def_name} +# define ${def_value} static_assert(X, #X) +# define ${def_value_msg} static_assert(X, MSG) +# else +# define ${prefix_arg}_STATIC_ASSERT_JOIN(X, Y) ${prefix_arg}_STATIC_ASSERT_JOIN_IMPL(X, Y) +# define ${prefix_arg}_STATIC_ASSERT_JOIN_IMPL(X, Y) X##Y +template<bool> struct ${prefix_arg}StaticAssert; +template<> struct ${prefix_arg}StaticAssert<true>{}; +# define ${def_value} ${def_fallback} +# define ${def_value_msg} ${def_fallback} +# endif +\n") endif() if (feature STREQUAL cxx_alignas) set(def_value "${prefix_arg}_ALIGNAS(X)") |