This version includes two bugfixes: - use ${MAKE} to recursively call make - fix the misleading example in the man page: macros name may not be reserved words Both bugs found and fixed by Anna “CyberTailor”, thanks!

> Macros names may not be reserved words

https://www.gnu.org/software/make/manual/html_node/Error-Messages.html

some [ implementation will warn about "bad number"

it's used only to parse the -p flag. While there add check_port_num to check the range for the port.

it causes a cascade of warnings on some architectures. Also, for what we're doing here, the signed/unsigned property isn't important.

* expand $-macros as string, only the new @-macros get expanded as-is * rollback changes to characters allowed in bare strings * optional semicolons in optnl, useful for readable @-macros

This allows to solve the problem with the \n in the grammar (before two following macro declaration were treated as invalid. This also brings in a nice `include' keyword.