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nethack/sys/share/pcsys.c
nhmall cb223271cb add cross-compile recipe for amiga 
Disclaimer: This is a minimal recipe, just to get someone else
started if they have a desire to get a full cross-compile of
NetHack-3.7 going for the Amiga. Some NetHack code bitrot was
corrected, and it does seem able to compile the game itself
to a point. See caveats below.

- If you want to obtain the cross-compiler and tools/libs for Amiga
         https://github.com/bebbo/amiga-gcc

  To our knowledge, a pre-built copy isn't available, so you have to
  obtain the source via git and build it on your system.

  The build prerequisite packages for Ubuntu are easily obtained:

    sudo apt install make wget git gcc g++ lhasa libgmp-dev \
        libmpfr-dev libmpc-dev flex bison gettext texinfo ncurses-dev \
        autoconf rsync

  The build prerequisite packages for macOS are apparently easily
  obtained via homebrew, but that was not tested:

    brew install bash wget make lhasa gmp mpfr libmpc flex gettext \
    texinfo gcc make autoconf

  After installing the prerequite packages and the cross-compiler
  it was a straightforward build:

        git clone https://github.com/bebbo/amiga-gcc.git
        cd amiga-gcc
        make update
    [Note that you may have to take ownership of the files in the
     bebbo repo via chown before succesfully carrying out the next
     steps]
        make clean
        make clean-prefix
        date; make all -j3 >&b.log; date
  The compiler pieces are installed in /opt/amiga by default which
  was satisfactory for our initial attempt, but if you want you can
  alter the prefix before you build if you want. That is all
  spelled out on the page at: https://github.com/bebbo/amiga-gcc

  The Amiga cross-compile can then be carried out by specifying
  CROSS_TO_AMIGA=1 on the make command line.

  For example:
       make CROSS_TO_AMIGA=1 all
       make CROSS_TO_AMIGA=1 package

You can explicitly include tty and curses support if desired, otherwise
you'll end up with a tty-only cross-compile build. The SDL1 pdcurses
support has not been tested.

       make WANT_WIN_TTY=1 WANT_WIN_CURSES=1 CROSS_TO_AMIGA=1 all

Also note that building the amiga targets using the make command
above, does not preclude you from building local linux or macOS
targets as well. Just drop the CROSS_TO_AMIGA=1 from the make
command line.

The cross-compiler hints additions are enclosed inside ifdef sections
and won't interfere with the non-cross-compile build in that case.

CAVEATS: The original NetHack Amiga build steps included the source for
some utilities that were built and executed on the amiga: txt2iff and
xpm2iff as part of the NetHack build procedure on amiga. Those did not
compile out-of-the-box on the linux host. They will either have to be:
    - ported to build and run on the linux or macOS cross-compile host

   or

    - their functionality will have to be rolled into amiga NetHack
      itself and executed on the target Amiga the first time the game
      is run, perhaps.

Good luck amiga aficionados, perhaps you'll be able to take this
initial effort forward and get NetHack-3.7 available on the amiga or
amiga-emulator. Let us know if you do, and we can roll changes in
if you provide them.
2020-09-28 17:30:22 -04:00

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/* NetHack 3.7 pcsys.c $NHDT-Date: 1596498283 2020/08/03 23:44:43 $ $NHDT-Branch: NetHack-3.7 $:$NHDT-Revision: 1.42 $ */
/* Copyright (c) 2012 by Michael Allison */
/* NetHack may be freely redistributed. See license for details. */
/*
* System related functions for MSDOS, OS/2, TOS
*/
#define NEED_VARARGS
#include "hack.h"
#include "wintty.h"
#include <ctype.h>
#include <fcntl.h>
#if !defined(MSDOS) && !defined(WIN_CE) && !defined(AMIGA_CROSS)
#include <process.h>
#endif
#if defined(__GO32__) || defined(AMIGA_CROSS)
#define P_WAIT 0
#define P_NOWAIT 1
#endif
#ifdef TOS
#include <osbind.h>
#endif
#if defined(MSDOS) && !defined(__GO32__)
#define findfirst findfirst_file
#define findnext findnext_file
#define filesize filesize_nh
#endif
#if defined(MICRO) || defined(OS2)
void FDECL(nethack_exit, (int)) NORETURN;
#else
#define nethack_exit exit
#endif
static void NDECL(msexit);
#ifdef MOVERLAY
extern void __far __cdecl _movepause(void);
extern void __far __cdecl _moveresume(void);
extern unsigned short __far __cdecl _movefpause;
extern unsigned short __far __cdecl _movefpaused;
#define __MOVE_PAUSE_DISK 2 /* Represents the executable file */
#define __MOVE_PAUSE_CACHE 4 /* Represents the cache memory */
#endif /* MOVERLAY */
#if defined(MICRO)
void
flushout()
{
(void) fflush(stdout);
return;
}
static const char *COMSPEC =
#ifdef TOS
"SHELL";
#else
"COMSPEC";
#endif
#define getcomspec() nh_getenv(COMSPEC)
#ifdef SHELL
int
dosh()
{
extern char orgdir[];
char *comspec;
#ifndef __GO32__
int spawnstat;
#endif
#if defined(MSDOS) && defined(NO_TERMS)
int grmode = iflags.grmode;
#endif
if ((comspec = getcomspec())) {
#ifndef TOS /* TOS has a variety of shells */
suspend_nhwindows(
"To return to NetHack, enter \"exit\" at the system prompt.\n");
#else
#if defined(MSDOS) && defined(NO_TERMS)
grmode = iflags.grmode;
#endif
suspend_nhwindows((char *) 0);
#endif /* TOS */
#ifndef NOCWD_ASSUMPTIONS
chdirx(orgdir, 0);
#endif
#ifdef __GO32__
if (system(comspec) < 0) { /* wsu@eecs.umich.edu */
#else
#ifdef MOVERLAY
/* Free the cache memory used by overlays, close .exe */
_movefpause |= __MOVE_PAUSE_DISK;
_movefpause |= __MOVE_PAUSE_CACHE;
_movepause();
#endif
spawnstat = spawnl(P_WAIT, comspec, comspec, (char *) 0);
#ifdef MOVERLAY
_moveresume();
#endif
if (spawnstat < 0) {
#endif
raw_printf("Can't spawn \"%s\"!", comspec);
getreturn("to continue");
}
#ifdef TOS
/* Some shells (e.g. Gulam) turn the cursor off when they exit */
if (iflags.BIOS)
(void) Cursconf(1, -1);
#endif
#ifndef NOCWD_ASSUMPTIONS
chdirx(hackdir, 0);
#endif
get_scr_size(); /* maybe the screen mode changed (TH) */
#if defined(MSDOS) && defined(NO_TERMS)
if (grmode)
gr_init();
#endif
resume_nhwindows();
} else
pline("Can't find %s.", COMSPEC);
return 0;
}
#endif /* SHELL */
#endif /* MICRO */
/*
* Add a backslash to any name not ending in /, \ or : There must
* be room for the \
*/
void
append_slash(name)
char *name;
{
char *ptr;
if (!*name)
return;
ptr = name + (strlen(name) - 1);
if (*ptr != '\\' && *ptr != '/' && *ptr != ':') {
*++ptr = '\\';
*++ptr = '\0';
}
return;
}
void
getreturn(str)
const char *str;
{
#ifdef TOS
msmsg("Hit <Return> %s.", str);
#else
#ifdef AMIGA_CROSS
(void) printf("Hit <Enter> %s.", str);
#else
msmsg("Hit <Enter> %s.", str);
#endif
#endif
while (pgetchar() != '\n')
;
return;
}
void msmsg
VA_DECL(const char *, fmt)
{
VA_START(fmt);
VA_INIT(fmt, const char *);
#if defined(MSDOS) && defined(NO_TERMS)
if (iflags.grmode)
gr_finish();
#endif
Vprintf(fmt, VA_ARGS);
flushout();
VA_END();
return;
}
/*
* Follow the PATH, trying to fopen the file.
*/
#ifdef TOS
#ifdef __MINT__
#define PATHSEP ':'
#else
#define PATHSEP ','
#endif
#else
#define PATHSEP ';'
#endif
FILE *
fopenp(name, mode)
const char *name, *mode;
{
char buf[BUFSIZ], *bp, *pp, lastch = 0;
FILE *fp;
/* Try the default directory first. Then look along PATH.
*/
(void) strncpy(buf, name, BUFSIZ - 1);
buf[BUFSIZ - 1] = '\0';
if ((fp = fopen(buf, mode)))
return fp;
else {
int ccnt = 0;
pp = getenv("PATH");
while (pp && *pp) {
bp = buf;
while (*pp && *pp != PATHSEP) {
lastch = *bp++ = *pp++;
ccnt++;
}
if (lastch != '\\' && lastch != '/') {
*bp++ = '\\';
ccnt++;
}
(void) strncpy(bp, name, (BUFSIZ - ccnt) - 2);
bp[BUFSIZ - ccnt - 1] = '\0';
if ((fp = fopen(buf, mode)))
return fp;
if (*pp)
pp++;
}
}
#ifdef OS2_CODEVIEW /* one more try for hackdir */
(void) strncpy(buf, hackdir, BUFSZ);
buf[BUFSZ - 1] = '\0';
if ((strlen(name) + 1 + strlen(buf)) < BUFSZ - 1) {
append_slash(buf);
Strcat(buf, name);
} else
impossible("fopenp() buffer too small for complete filename!");
if (fp = fopen(buf, mode))
return fp;
#endif
return (FILE *) 0;
}
#if defined(MICRO) || defined(OS2)
void
nethack_exit(code)
int code;
{
msexit();
exit(code);
}
/* Chdir back to original directory
*/
#ifdef TOS
extern boolean run_from_desktop; /* set in pcmain.c */
#endif
static void
msexit()
{
#ifdef CHDIR
extern char orgdir[];
#endif
flushout();
#ifndef TOS
enable_ctrlP(); /* in case this wasn't done */
#endif
#if defined(CHDIR) && !defined(NOCWD_ASSUMPTIONS)
chdir(orgdir); /* chdir, not chdirx */
chdrive(orgdir);
#endif
#ifdef TOS
if (run_from_desktop)
getreturn("to continue"); /* so the user can read the score list */
#ifdef TEXTCOLOR
if (colors_changed)
restore_colors();
#endif
#endif
wait_synch();
return;
}
#endif /* MICRO || OS2 */
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