Option to set initial memory offset

[squidink7]

Describe the feature

Please consider adding the ability to set an initial memory offset, which V can treat as the start of the available memory when allocating.

Use Case

I'm trying to use V to code for the tic80, as it supports wasm which V can compile to. This system uses memory mapped IO which means that the first 96kb of memory is reserved for system functions, and if written to can cause strange behavior. The Zig template provided by tic80 shows a memory offset being applied to prevent the language from allocating in this region.

Proposed Solution

A simple command line flag or similar would be preferable. Most other languages have this kind of option in a project file, which is convenient however V currently does not have many options in the v.mod file. Changing that would be interesting to consider but way out of scope for this issue.

Other Information

No response

Acknowledgements

• I may be able to implement this feature request
• This feature might incur a breaking change

Version used

master

Environment details (OS name and version, etc.)

V full version: V 0.3.4 2597efa.134e781
OS: linux, "Arch Linux"
Processor: 6 cpus, 64bit, little endian, AMD Ryzen 5 4500U with Radeon Graphics

getwd: /home/squidink7
vexe: /home/squidink7/.v/v
vexe mtime: 2023-05-05 05:21:30

vroot: OK, value: /home/squidink7/.v
VMODULES: OK, value: /home/squidink7/.vmodules
VTMP: OK, value: /tmp/v_1000

Git version: git version 2.40.1
Git vroot status: weekly.2023.10-323-g134e7819 (20 commit(s) behind V master)
.git/config present: true

CC version: cc (GCC) 13.1.1 20230429
thirdparty/tcc status: thirdparty-linux-amd64 12f392c3