Cross-compiler

[Tim Maxwell <timmaxw@...>]

Hi,

Attached are modified versions of ldump.c, lundump.h, and luac.c to  
allow for cross-compilation. They should work as drop-in  
replacements. I've done some basic testing, but I only have access to  
one architecture so I can't test endianness.

This code lets you specify:
* the endianness of the target platform
* the size of int as 8, 16, or 32 (no 64-bit support right now)
* lua_Number as an int (8, 16, or 32 bits) or a float (32 or 64 bits)

ldump.c exports a new function called "luaU_dump_crosscompile" that  
works like luaU_dump except that it takes a DumpTargetInfo structure.

luaU_dump_crosscompile supports different sizes of size_t but luac  
does not allow it to be set from the command line. Are there any  
targets where sizeof(int) is different from sizeof(size_t)?

This code assumes that 'float' is a standard 32-bit float and  
'double' is a standard 64-bit double. It will trip a lua_assert if  
lua_Number is not integer but sizeof(lua_Number) is not 32 or 64. Is  
that portable enough?

Tim Maxwell

Attachment: ldump.c
Description: Binary data

Attachment: luac.c
Description: Binary data

Attachment: lundump.h
Description: Binary data