Hi, it appears that autoconf's -I flag does not show any effect in simple cases (namely simple test cases without AC_CONFIG_MACRO_DIRS which implies other dependencies like AM_INIT_AUTOMAKE). The simple example below shows that autoconf passes the -I flag on to autom4te, but the m4-macro defined in m4/help.m4 is not expanded in configure. Or is it that hell.m4 is to be explicitly m4_include'd in configure.ac (which does certainly help here)? If this was correct, what exactly should one expect autoconf's -I flag to do - in such a simple case and in general? $ cat configure.ac AC_INIT ## begin SAY_HELLO ### end AC_OUTPUT $ cat m4/hello.m4 AC_DEFUN([SAY_HELLO],[AS_ECHO([Hello!])]) $ autoconf -v -I m4 2>&1 | sed -n '1p' autoconf: running /usr/bin/autom4te -v -I m4 --language=autoconf --output=configure configure.ac $ sed -n '/### begin/,/### end/p' configure ### begin SAY_HELLO ### end ... thus SAY_HELLO is not expanded in configure. Help and enlightening comments most welcome, J.
