1 1 8.1 M4 Quotation 1 ================ 1 1 The most common problem with existing macros is an improper quotation. 1 This section, which users of Autoconf can skip, but which macro writers 1 _must_ read, first justifies the quotation scheme that was chosen for 1 Autoconf and then ends with a rule of thumb. Understanding the former 1 helps one to follow the latter. 1
1 · Active Characters Characters that change the behavior of M4 · One Macro Call Quotation and one macro call · Quoting and Parameters M4 vs. shell parameters · Quotation and Nested Macros Macros calling macros · Changequote is Evil Worse than INTERCAL: M4 + changequote · Quadrigraphs Another way to escape special characters · Balancing Parentheses Dealing with unbalanced parentheses · Quotation Rule Of Thumb One parenthesis, one quote 1