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| author | Justin M. Keyes <justinkz@gmail.com> | 2019-01-08 22:00:52 +0100 |
|---|---|---|
| committer | Justin M. Keyes <justinkz@gmail.com> | 2019-01-09 10:41:17 +0100 |
| commit | fc4ca5bdd8c5a2b37b6efe34a9b32a1bd75c57af (patch) | |
| tree | 5d2a8d101f513807fac7f88a011ad88976141277 /src | |
| parent | 596f020e904b2da2dac1bc080eb69f66deb998d7 (diff) | |
| download | rneovim-fc4ca5bdd8c5a2b37b6efe34a9b32a1bd75c57af.tar.gz rneovim-fc4ca5bdd8c5a2b37b6efe34a9b32a1bd75c57af.tar.bz2 rneovim-fc4ca5bdd8c5a2b37b6efe34a9b32a1bd75c57af.zip | |
CMake: Feature-detect __builtin_{add,sub}_overflow
Diffstat (limited to 'src')
| -rw-r--r-- | src/nvim/assert.h | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/src/nvim/assert.h b/src/nvim/assert.h index 3f985475a7..29195a49dc 100644 --- a/src/nvim/assert.h +++ b/src/nvim/assert.h @@ -122,6 +122,7 @@ #endif /// @def STRICT_ADD +/// @brief Adds (a + b) and stores result in `c`. Aborts on overflow. /// /// Requires GCC 5+ and Clang 3.8+ /// https://clang.llvm.org/docs/LanguageExtensions.html @@ -132,8 +133,7 @@ /// /// @param MAX Maximum value of the narrowest type of operand. /// Not used if compiler supports __builtin_add_overflow. -#if (defined(__clang__) && __has_builtin(__builtin_add_overflow)) \ - || (__GNUC__ >= 5) +#if HAVE_BUILTIN_ADD_OVERFLOW # define STRICT_ADD(a, b, c, t) \ do { if (__builtin_add_overflow(a, b, c)) { abort(); } } while (0) #else @@ -141,8 +141,9 @@ do { *(c) = (t)(a + b); } while (0) #endif -#if (defined(__clang__) && __has_builtin(__builtin_sub_overflow)) \ - || (__GNUC__ >= 5) +/// @def STRICT_SUB +/// @brief Subtracts (a - b) and stores result in `c`. Aborts on overflow. +#if HAVE_BUILTIN_ADD_OVERFLOW # define STRICT_SUB(a, b, c, t) \ do { if (__builtin_sub_overflow(a, b, c)) { abort(); } } while (0) #else |