[libc-commits] [libc] [libc][test] adds errno clearer test fixture, gtest-style errno and fp except assertions (PR #91608)

[Michael Flanders via libc-commits]

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@@ -18,7 +18,7 @@ namespace LIBC_NAMESPACE::testing {
 // This provides a test fixture (or base class for other test fixtures) that
 // asserts that each test does not leave the FPU state represented by `fenv_t`
 // (aka `FPState`) perturbed from its initial state.
-class FEnvSafeTest : public Test {
+class FEnvSafeTest : virtual public Test {
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Flandini wrote:

I changed this to virtual to let FPTest subclass both fixtures:
```
template <typename T> class FPTest : 
public ErrnoSafeTest, public FEnvSafeTest {...
```

https://github.com/llvm/llvm-project/pull/91608