https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101211
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Ah, I bet it started to fail because I added this to the test:
{ dg-add-options no_pch }
So this should fix it for arm:
--- a/libstdc++-v3/testsuite/17_intro/names.cc
+++ b/libstdc++-v3/testsuite/17_intro/names.cc
@@ -208,6 +208,11 @@
#undef r
#endif
+#if defined (__linux__) && defined (__arm__)
+// <sys/ucontext.h> defines fpregset_t::fpregs::j
+#undef j
+#endif
+
#if defined (__linux__) && defined (__powerpc__)
// <asm/types.h> defines __vector128::u
#undef u
What is the exact error for aarch64?
