https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101234
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Looks like the testsuite is incorrect, it should have been 'en_US.ISO8859-15'
pinskia at gcc dot gnu.org via Gcc-bugs Sun, 27 Jun 2021 19:15:19 -0700
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101234
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Looks like the testsuite is incorrect, it should have been 'en_US.ISO8859-15'