suggestions about AC_CONFIG_MACRO_DIR

[Lorenzo Bettini]

Hi

I started adding some m4 macros to my program, that I put in the m4 
directory in my sources, and that will be installed during the make install.

I then added

aclocaldir = $(datadir)/aclocal
aclocal_DATA = ax_boost_base.m4 ax_boost_regex.m4

in the m4/Makefile.am

and

ACLOCAL_AMFLAGS = -I m4

in the root Makefile.am (together with m4 in subdirs).

Now, if I run autoreconf, it will install the .m4 files related to 
libtool in my m4 directory:


libtoolize: putting macros in `m4'.
libtoolize: copying file `m4/libtool.m4'
libtoolize: You should add the contents of `m4/libtool.m4' to `aclocal.m4'.
libtoolize: copying file `m4/ltoptions.m4'
libtoolize: You should add the contents of `m4/ltoptions.m4' to 
`aclocal.m4'.
libtoolize: copying file `m4/ltsugar.m4'
libtoolize: You should add the contents of `m4/ltsugar.m4' to `aclocal.m4'.
libtoolize: copying file `m4/ltversion.m4'
libtoolize: You should add the contents of `m4/ltversion.m4' to 
`aclocal.m4'.
libtoolize: copying file `m4/lt~obsolete.m4'
libtoolize: You should add the contents of `m4/lt~obsolete.m4' to 
`aclocal.m4'.
libtoolize: Consider adding `AC_CONFIG_MACRO_DIR([m4])' to configure.ac and
libtoolize: rerunning libtoolize, to keep the correct libtool macros 
in-tree.

is it a good thing?  Or would it be better to keep these macros in a 
different directory?  In that case I should pass 
AC_CONFIG_MACRO_DIR([other value?]).
What is the most used convention about this?

thanks in advance
        Lorenzo

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Lorenzo Bettini, PhD in Computer Science, DI, Univ. Torino
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