Unable to compile on DOS

[leap0x7b]

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Bug description

A clear and concise description of the bug you are experiencing.
Tell what you were trying to do and what happened instead.

I'm trying to build Nelua on DOSBox-X using DJGPP, but it failed to compile.

Expected behavior

A clear and concise description of what you expected to happen.

It should compile correctly

Environment

Provide relevant information about your environment:

• Nelua version (you can check with nelua -v). Nelua from the master branch
• Platform (e.g. Windows/MSYS2, Ubuntu Linux, MacOS) DOSBox-X
• Architecture (e.g. x86_64, arm64) i386 (DOSBox-X)
• C compiler if your bug has C compiler errors. (e.g. GCC 10.2, Clang 11) GCC 9.3.0

[edubart]

I've fixed those issues and others in commit 41bf260, but then lots of issues starts to appear, it's not worth to get Nelua compiler to work inside DOSBox, it's best to use it outside with DJGPP installed in your host OS, there are some binary releases for it at https://github.com/andrewwutw/build-djgpp/releases .

Then once you get DJGPP installed in your system, you should compile with the following line:

nelua --cc=i686-pc-msdosdjgpp-gcc --cflags="-march=i386 -lemu" -bo hello.exe examples/helloworld.nelua

Then copy hello.exe to DOSBox files and it show work.

In case you insist trying to compile nelua-lua.exe to use inside DOSBox, I was able to compile with the following line:

make SYS=Posix \
           CC=i686-pc-msdosdjgpp-gcc \
           NO_RPMALLOC=1 \
           CFLAGS="-march=i386 -lemu -D_longjmp=longjmp -D_setjmp=setjmp -Dgetc_unlocked=getc -Dflockfile=UNUSED -Dfunlockfile=UNUSED -DLUA_CPATH_DEFAULT='\"\"' -DLUA_DIRSEP='\"\\\\\"' -DLUA_PATH_DEFAULT='\".\\\\?.lua\"'"

This generates a working nelua-lua.exe that can run Lua scripts, but it's failing finding modules files, and I am not going to or think it's worth to patch the Lua interpreter, so I've stopped there.