https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88772
--- Comment #6 from Andoni <ylatuya at gmail dot com> --- (In reply to Eric Botcazou from comment #5) > > But you said above that the result is "yes" for 32-bit, so how come the test: > > x$ac_cv_sjlj_exceptions = xyes; > > is false? Does it help to rewrite it into just: > > $ac_cv_sjlj_exceptions = yes; > > like in libgcc/configure.ac? I see what you mean. "config.log" do report for 32 bits "ac_cv_sjlj_exceptions=yes" I don't understand why this check fails than. It's either a problem with the order in which it's done (although I checked and it's correct) or an issue in how the value is checked. I will test several option, with quites, without prepending the x, etc... and I will report back.