[compiler-rt] [builtins] Support building the 128-bit float functions on i386 (PR #122658)

[Alexander Richardson via llvm-commits]

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@@ -1,10 +1,10 @@
-// RUN: %clang_builtins %s %librt -o %t && %run %t
+// RUN: %clang_builtins %s %librt -fforce-enable-int128 -o %t && %run %t
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arichardson wrote:

Will adding this flag unconditionally break other/older compilers? Maybe this needs to be a lit substitution?

https://github.com/llvm/llvm-project/pull/122658