[libc][trivial] Make LlvmLibcExhaustiveTest::check method purely virtual.

diff --git a/libc/test/src/math/exhaustive/exhaustive_test.h b/libc/test/src/math/exhaustive/exhaustive_test.h
index 0782da7..ca4f048 100644 (file)
--- a/libc/test/src/math/exhaustive/exhaustive_test.h
+++ b/libc/test/src/math/exhaustive/exhaustive_test.h
@@ -22,5 +22,5 @@ struct LlvmLibcExhaustiveTest : public __llvm_libc::testing::Test {
   void test_full_range(T start, T stop, int nthreads,
                        mpfr::RoundingMode rounding);
 
-  virtual void check(T start, T stop, mpfr::RoundingMode rounding);
+  virtual void check(T start, T stop, mpfr::RoundingMode rounding) = 0;
 };