https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69266
Irfan Adilovic <irfanadilovic at gmail dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |irfanadilovic at gmail dot com --- Comment #5 from Irfan Adilovic <irfanadilovic at gmail dot com> --- I can confirm that this still happens with the 20160117 snapshot. I've tried tprince's suggestion to --disable-libstdcxx but this first leads to a -Werror=pedantic error in isl/include/isl/ctx.h:83 due to a trailing comma in typedef enum { isl_stat_error = -1, isl_stat_ok = 0, // <-- here } isl_stat; ISL was downloaded via contrib/download_prerequisites. Fixing that leads to a make error when "Comparing stages 2 and 3": Comparing stages 2 and 3 warning: gcc/cc1-checksum.o differs warning: gcc/cc1plus-checksum.o differs Bootstrap comparison failure! gmp/mpf/eq.o differs ... about 60 such lines gmp/randmui.o differs Makefile:20907: recipe for target 'compare' failed Is there a snapshot known to have worked on cygwin to perform a bisect?