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All the M4 native macros are moved in the `m4_' pseudo-namespace,
e.g., M4sugar renames define
as m4_define
etc. There is
one exception: dnl
kept its original name, and no m4_dnl
is defined.
M4sugar redefines some M4 macros, and made them slightly incompatible with their native equivalent.
m4_undefine
.
m4_ifdef([macro], [m4_undefine([macro])]) |
to recover the behavior of the builtin.
m4_undefine
.