Source: emacs25 Version: 25.2+1-2 Severity: serious Hello, emacs25 seems to be FTBFS on arm64. In Ubuntu we had mostly the same failure in the past months, and we workarounded it by using -O0 on that architecture. Since Debian has porterboxes, a better debugging should be the best solution
ifeq ($(DEB_HOST_ARCH),arm64) CFLAGS += -O0 endif should make it build. G.