Add rudimentary support for `__float128`

This adds `__float128` as a builtin type, and generates an opaque array
of 16 `u8`s to represent it in the generated bindings since Rust doesn't
have an `f128` type.

Context and motivation: Somehow `__float128` is getting pulled into
SpiderMonkey headers from somewhere, and the lack of `__float128`
support was causing bindgen to hard fail in bindings generation.

1 files changed, 13 insertions, 0 deletions

diff --git a/tests/headers/float128.hpp b/tests/headers/float128.hpp
new file mode 100644
index 00000000..f554e88e
--- /dev/null
+++ b/tests/headers/float128.hpp
@@ -0,0 +1,13 @@
+// FIXME: libclang < 3.9 does not expose `__float128` in its interface, so this
+// test will fail. Once we remove support for `--features llvm_stable` and
+// require libclang >= 3.9, we can reenable this test.
+//
+// static __float128 global = 1.0;
+
+// FIXME: We have no way to get 128 bit aligned structs in Rust at the moment,
+// and therefore the generated layout tests for this struct will fail. When we
+// can enforce 128 bit alignment, we can re-enable this test.
+//
+// struct A {
+//     __float128 f;
+// };