diff options
| -rw-r--r-- | ChangeLog | 7 | ||||
| -rw-r--r-- | lib/intprops.h | 4 |
2 files changed, 10 insertions, 1 deletions
@@ -1,3 +1,10 @@ +2019-08-24 Paul Eggert <eggert@cs.ucla.edu> + + intprops: say why not Clang __builtin_add_overflow + * lib/intprops.h (_GL_HAS_BUILTIN_OVERFLOW): + Mention Clang in comment, responding to a query from + Mattias Engdegård. + 2019-08-24 Bruno Haible <bruno@clisp.org> doc: Document most of the files outside of modules. diff --git a/lib/intprops.h b/lib/intprops.h index 2c02568834..fbbc3cffe0 100644 --- a/lib/intprops.h +++ b/lib/intprops.h @@ -220,7 +220,9 @@ ? (a) < (min) >> (b) \ : (max) >> (b) < (a)) -/* True if __builtin_add_overflow (A, B, P) works when P is non-null. */ +/* True if __builtin_add_overflow (A, B, P) works when P is non-null. + See <https://bugs.llvm.org/show_bug.cgi?id=16404> for why this is + false for Clang. */ #if 5 <= __GNUC__ && !defined __ICC # define _GL_HAS_BUILTIN_OVERFLOW 1 #else |