https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97088
--- Comment #1 from joseph at codesourcery dot com <joseph at codesourcery dot com> --- On Thu, 17 Sep 2020, clyon at gcc dot gnu.org wrote: > This happens because the testcase does > #define x ( > and "x" is used as parameter names in several function prototypes in newlib's > math.h That's a bug in newlib, which should be fixed there.