Consider following Makefile.am: noinst_PROGRAMS = footool footool_SOURCES = foo=bar.c footool_CPPFLAGS = -DVERSION=4.0
processed with automake 1.14, autoconf 2.69, yields: /usr/share/automake-1.14/am/depend2.am: error: bad characters in variable name 'footool-foo' /usr/share/automake-1.14/am/depend2.am: warning: footool-foo multiply defined in condition TRUE ... /usr/share/automake-1.14/am/depend2.am: ... 'footool-foo' previously defined here autoreconf: automake failed with exit status: 1 Other automake versions are affected as well, at least automake 1.13.1 and automake 1.12.6 Also noteworthy the variant without CPPFLAGS seems to work: noinst_PROGRAMS = footool footool_SOURCES = foo=bar.c $ autoreconf -fi $ echo $? 0
