After configuration, intl/Makefile still has the following lines:
# The dependency for intlh.inst is different in gettext and all other
# packages. Because we cannot you GNU make features we have to solve
# the problem while rewriting Makefile.in.
@GT_YES(_at_)intlh(_dot_)inst: intlh.inst.in ../config.status
@GT_YES@ cd .. \
@GT_YES@ && CONFIG_FILES=$(subdir)/$@ CONFIG_HEADERS= \
@GT_YES@ $(SHELL) ./config.status
@GT_NO(_at_)(_dot_)PHONY: intlh.inst
@GT_NO(_at_)intlh(_dot_)inst:
This is a fatal error that prevents compilation of fetchmail.