https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107327
--- Comment #1 from Carlos E <kaploceh at gmail dot com> --- I haven't had any problems compiling it with Make before, usually it goes into: g++ -O3 -pedantic -std=c++2a -g -Wall -Wextra -Wno-unused-parameter -Wno-sign-compare -Wno-address -Wno-init-list-lifetime -MD -MP -MF <file.d> -c -o <file.o> <file.cc> with the variable CXXFLAGS += -pedantic -std=c++2a -g -Wall -Wextra -Wno-unused-parameter -Wno-sign-compare -Wno-address from the Makefile and so on But this time around, it stops right with the message internal compiler error: in tsubst_pack_expansion, at cp/pt.c:12930 It finishes by telling me to Please submit a full bug report, with preprocessed source if appropriate. Please include the complete backtrace with any bug report. See <https://gcc.gnu.org/bugs/> for instructions. while GNU Make says Once you have a precise problem you can report it in one of two ways. Either send electronic mail to: bug-m...@gnu.org or use our Web-based project management tool, at: http://savannah.gnu.org/projects/make/ So I'm reporting it here rather than over there.