* acgeneral.m4 (AC_UNGNITS): Renamed as...
(_AC_VERSION_UNLETTER): this. All callers changed.
Implement the scheme proposed by Alexandre Oliva:
Nl -> (N+1).-1.(l#)
(_AC_VERSION_COMPARE): New macro.
(AC_PREREQ): Use it.
quotes.
* libm4.m4 (m4_split): Quote the elements of the list you produce.
* tests/base.m4: New file, testing libm4.
All callers adapted.
Test m4_wrap.
in the `libm4' name space.
* libm4 (m4_changequote, m4_define, m4_defn, m4_dnl, m4_indir,
m4_undefine): Private copies in the global name space. Used by
the name space mechanisms.
(m4_namespace_register): New macro.
(m4_namespace_define): Use it.
(builtin, changequote, defn, dnl, esyscmd, ifdef, ifelse, indir,
patsubst, popdef, pushdef, regexp, undefine, syscmd, sysval): Put
in the `libm4' name space.
(m4_disable, m4_enable): Use the private m4_indir, otherwise once
`libm4' closed, there is no `indir' available, and therefore no
means to reopen a name space.
