build failed on windows: unknown escape sequence

[prvnprk]

windows uses "\" in paths. that is causing problems when i try building it using zig build.

here is the error message:

PS D:\projects\b> zig build
install
└─ install b
   └─ compile exe b Debug arm-linux-android
      └─ compile lib lua Debug arm-linux-android
         └─ run exe buildvm (lj_ffdef.h)
            └─ compile exe buildvm Debug arm-linux-musleabihf 79 errors
.zig-cache\o\127349c6c20b3b0a0b5df2799cec84f6/buildvm_arch.h:8:12: error: unknown escape sequence '\p'
#line 1 "D:\projects\b\zig-pkg\N-V-__8AABdRQgCigs7KLUb8QxQk1Pi15kpIDYtYvMoXpMGb\src\vm_arm.dasc"
           ^~~
D:\projects\b\zig-pkg\N-V-__8AABdRQgCigs7KLUb8QxQk1Pi15kpIDYtYvMoXpMGb\src/host/buildvm.c:75:10: note: in file included from D:\projects\b\zig-pkg\N-V-__8AABdRQgCigs7KLUb8QxQk1Pi15kpIDYtYvMoXpMGb\src/host/buildvm.c:75:
#include "buildvm_arch.h"
         ^
.zig-cache\o\127349c6c20b3b0a0b5df2799cec84f6/buildvm_arch.h:8:27: error: unknown escape sequence '\z'
#line 1 "D:\projects\b\zig-pkg\N-V-__8AABdRQgCigs7KLUb8QxQk1Pi15kpIDYtYvMoXpMGb\src\vm_arm.dasc"
                          ^~~
D:\projects\b\zig-pkg\N-V-__8AABdRQgCigs7KLUb8QxQk1Pi15kpIDYtYvMoXpMGb\src/host/buildvm.c:75:10: note: in file included from D:\projects\b\zig-pkg\N-V-__8AABdRQgCigs7KLUb8QxQk1Pi15kpIDYtYvMoXpMGb\src/host/buildvm.c:75:
#include "buildvm_arch.h"
         ^
.zig-cache\o\127349c6c20b3b0a0b5df2799cec84f6/buildvm_arch.h:8:35: error: expected '{' after '\N' escape sequence
#line 1 "D:\projects\b\zig-pkg\N-V-__8AABdRQgCigs7KLUb8QxQk1Pi15kpIDYtYvMoXpMGb\src\vm_arm.dasc"
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and so on...

[thsackos]

Hi @prvnprk, thanks for sharing these details and proposing a fix; however, I'm not able to reproduce this build issue on my windows machine or the windows CI/CD build agent on GitHub.

Can you share some more information about how to reproduce the issue? Which version of Zig are you using, which version of zig-luajit, and are you able to build and run any of the examples in zig-luajit?

[prvnprk]

I am sorry, I did not get any notification of your comment.
Here are the versions:

Luajit_build: 1.1.8
.url = "git+https://github.com/sackosoft/zig-luajit#11887ffa5b03788c05d23e64f2aafb20b645570a",
.hash = "luajit-3.0.0-nMGF0vfCAwBfUsknnnrxFWEDZ4G6sOgppH6DGzWgn7fV",

Zig: 0.16.0

here is the build command:

zig build -Dtarget=arm-linux-android

[thsackos]

Ah. @prvnprk I see you're cross-compiling from Windows for Andrid. That seems like an issue with the upstream build project (sackosoft/zig-luajit-build), and I'm able to reproduce the issue there.

I'm not sure what the best path forward is. I created the correct issue in the upstream, but I don't plan to work on it any time soon (sackosoft/zig-luajit-build#15).

I think the easiest way for you to unblock yourself is to

1. Cross compile LuaJIT using the LuaJIT official Makefiles on a POSIX system, generate the static library files for Andrid or whatever else you want,
2. Fork this project to cusomize the build process,
3. Remove the zig-luajit-build dependency,
4. Replace it by statically linking a target-dependant LuaJIT object file

It would also make sense to add compile-time flag to this project to link the static file instead of the build project when enabled (but again, I don't plan to work on this any time soon)