https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79341
--- Comment #12 from Dominik Vogt <vogt at linux dot vnet.ibm.com> --- > so it should then for s390*-*-linux* also test for glibc >= 2.19 using > AC_TRY_COMPILE and preprocessor macros or so? Or something like $ nm /lib/ld-*.*.so | grep __tls_get_addr_internal ?