slackbuilds_ponce/development/4th/readme_64-bit.txt

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If you're using 64-bit processor - which nowadays is quite common - you can
compile 4th as 64-bit compiler. To do this, just delete patch #02 before
compilation. But read the following excerpt from original 4th docs first:
25.7 <sec:64-bit-platforms>64-bit platforms
Although 4tH will work perfectly well on a 64-bit platform there
are some disadvantages:
• HX files generated by this compiler are not portable to 32-bit
platforms
• Some 4tH library files may not work properly without some
modifications.
A quick fix is to change the size of a cell to a four byte
datatype. The following procedure will usually work. Open 4th.h
and change these lines:
#define CELL_MIN LONG_MIN
#define CELL_MAX LONG_MAX
typedef long cell;
To this:
#define CELL_MIN INT_MIN
#define CELL_MAX INT_MAX
typedef int cell;
Save 4th.h and compile as described in the previous sections. If
you want a full 64-bit 4tH compiler, be aware that:
• You cannot compile 4tH as a shared library
• You have to regenerate the include files manually, unless
you're working with Linux.
Linux automatically recreates the include files each time you
perform a compile. If you're working with a GNU toolset, you may
try the Linux Makefile. If that doesn't work or isn't an option
in your particular situation you'll have to perform the procedure
listed in section [sec:Regenerating-the-include].