workaround for IBM's XLClang compiler

2022-08-08 15:27:52 -04:00
parent fb2dd26d45
commit 92dc854ed4
1 changed files with 2 additions and 1 deletions
--- a/src/fmt/format.h
+++ b/src/fmt/format.h
@ -389,7 +389,8 @@ class uint128_fallback {
      hi_ += (lo_ < n ? 1 : 0);
      return *this;
    }
-#if FMT_HAS_BUILTIN(__builtin_addcll)
+// LAMMPS customization: XLCClang does not support __builtin_addcll()
+#if FMT_HAS_BUILTIN(__builtin_addcll) && !(defined(__xlc__) && defined(__clang__))
    unsigned long long carry;
    lo_ = __builtin_addcll(lo_, n, 0, &carry);
    hi_ += carry;