~emersion/mrsh

ref: 07e65a3a88e03c6d9e6f1f6ac4a1cfa9a74a9b09 mrsh/Makefile -rw-r--r-- 2.2 KiB
builtins: implement return
Partially implement arithmetic expansion

The only expansion missing is assignment expansion, which requires more
discussion.

Additionally, the parser is missing variable support, e.g. $((var+1)).
build: add `make mrproper` to remove all generated files
Add configure script and Makefile

The configure script is POSIX sh and the Makefile is POSIX make.