[Xcb] hidden-visibility and library size

[Vincent Torri]

> I believe the recommended thing to do is put your macro in a file named
> acinclude.m4 in the same directory as configure.ac. I think that should
> Just Work.

a guy on the autoconf ML answered me. If I want to use macros that are in
the m4/ subdir, i have to put:
1) in configure.ac: AC_CONFIG_MACRO_DIR(m4)
2) in the toplevel Makefile.am: ACLOCAL_AMFLAGS = -I m4

what do you think of that way to use macros ?

Vincent