(gettext.info)aclocal

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13.4.8 ‘aclocal.m4’ at top level
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   If you do not have an ‘aclocal.m4’ file in your distribution, the
simplest is to concatenate the files ‘codeset.m4’, ‘fcntl-o.m4’,
‘gettext.m4’, ‘glibc2.m4’, ‘glibc21.m4’, ‘iconv.m4’, ‘intdiv0.m4’,
‘intl.m4’, ‘intldir.m4’, ‘intlmacosx.m4’, ‘intmax.m4’, ‘inttypes_h.m4’,
‘inttypes-pri.m4’, ‘lcmessage.m4’, ‘lib-ld.m4’, ‘lib-link.m4’,
‘lib-prefix.m4’, ‘lock.m4’, ‘longlong.m4’, ‘nls.m4’, ‘po.m4’,
‘printf-posix.m4’, ‘progtest.m4’, ‘size_max.m4’, ‘stdint_h.m4’,
‘threadlib.m4’, ‘uintmax_t.m4’, ‘visibility.m4’, ‘wchar_t.m4’,
‘wint_t.m4’, ‘xsize.m4’ from GNU ‘gettext’’s ‘m4/’ directory into a
single file.  If you have suppressed the ‘intl/’ directory, only
‘gettext.m4’, ‘iconv.m4’, ‘lib-ld.m4’, ‘lib-link.m4’, ‘lib-prefix.m4’,
‘nls.m4’, ‘po.m4’, ‘progtest.m4’ need to be concatenated.

   If you are not using GNU ‘automake’ 1.8 or newer, you will need to
add a file ‘mkdirp.m4’ from a newer automake distribution to the list of
files above.

   If you already have an ‘aclocal.m4’ file, then you will have to merge
the said macro files into your ‘aclocal.m4’.  Note that if you are
upgrading from a previous release of GNU ‘gettext’, you should most
probably _replace_ the macros (‘AM_GNU_GETTEXT’, etc.), as they usually
change a little from one release of GNU ‘gettext’ to the next.  Their
contents may vary as we get more experience with strange systems out
there.

   If you are using GNU ‘automake’ 1.5 or newer, it is enough to put
these macro files into a subdirectory named ‘m4/’ and add the line

     ACLOCAL_AMFLAGS = -I m4

to your top level ‘Makefile.am’.

   If you are using GNU ‘automake’ 1.10 or newer, it is even easier: Add
the line

     ACLOCAL_AMFLAGS = --install -I m4

to your top level ‘Makefile.am’, and run ‘aclocal --install -I m4’.
This will copy the needed files to the ‘m4/’ subdirectory automatically,
before updating ‘aclocal.m4’.

   These macros check for the internationalization support functions and
related informations.  Hopefully, once stabilized, these macros might be
integrated in the standard Autoconf set, because this piece of ‘m4’ code
will be the same for all projects using GNU ‘gettext’.