Update compiler flags and fix Makefile and source code

[nater1983]

Added additional compiler flags and modified Makefile and source code for compatibility.

cc     -DSCOREFILE=\"/usr/games/lib/greed.hs\" -DRELEASE=\"4.2\" -o greed greed.c -lcurses
greed.c: In function ‘quit’:
greed.c:127:22: error: initialization of ‘void (*)(void)’ from incompatible pointer type ‘__sighandler_t’ {aka ‘void (*)(int)’} [-Wincompatible-pointer-types]
  127 |     void (*osig)() = signal(SIGINT, SIG_IGN);   /* save old signal */
      |                      ^~~~~~
In file included from greed.c:54:
/usr/include/signal.h:72:16: note: ‘__sighandler_t’ declared here
   72 | typedef void (*__sighandler_t) (int);
      |                ^~~~~~~~~~~~~~
greed.c:134:35: error: passing argument 2 of ‘signal’ from incompatible pointer type [-Wincompatible-pointer-types]
  134 |             (void) signal(SIGINT, osig);        /* reset old signal */
      |                                   ^~~~
      |                                   |
      |                                   void (*)(void)
/usr/include/signal.h:88:57: note: expected ‘__sighandler_t’ {aka ‘void (*)(int)’} but argument is of type ‘void (*)(void)’
   88 | extern __sighandler_t signal (int __sig, __sighandler_t __handler)
      |                                          ~~~~~~~~~~~~~~~^~~~~~~~~
/usr/include/signal.h:72:16: note: ‘__sighandler_t’ declared here
   72 | typedef void (*__sighandler_t) (int);
      |                ^~~~~~~~~~~~~~
greed.c:135:36: error: passing argument 2 of ‘signal’ from incompatible pointer type [-Wincompatible-pointer-types]
  135 |             (void) signal(SIGQUIT, osig);
      |                                    ^~~~
      |                                    |
      |                                    void (*)(void)
/usr/include/signal.h:88:57: note: expected ‘__sighandler_t’ {aka ‘void (*)(int)’} but argument is of type ‘void (*)(void)’
   88 | extern __sighandler_t signal (int __sig, __sighandler_t __handler)
      |                                          ~~~~~~~~~~~~~~~^~~~~~~~~
/usr/include/signal.h:72:16: note: ‘__sighandler_t’ declared here
   72 | typedef void (*__sighandler_t) (int);
      |                ^~~~~~~~~~~~~~
greed.c: In function ‘topscores’:
greed.c:521:18: error: conflicting types for ‘getenv’; have ‘char *(void)’
  521 |     extern char *getenv(), *tgetstr();
      |                  ^~~~~~
In file included from greed.c:48:
/usr/include/stdlib.h:773:14: note: previous declaration of ‘getenv’ with type ‘char *(const char *)’
  773 | extern char *getenv (const char *__name) __THROW __nonnull ((1)) __wur;
      |              ^~~~~~
greed.c:521:29: error: conflicting types for ‘tgetstr’; have ‘char *(void)’
  521 |     extern char *getenv(), *tgetstr();
      |                             ^~~~~~~
In file included from greed.c:53:
/usr/include/term.h:845:31: note: previous declaration of ‘tgetstr’ with type ‘char *(const char *, char **)’
  845 | extern NCURSES_EXPORT(char *) tgetstr (const char *, char **);
      |                               ^~~~~~~
greed.c:576:33: error: too many arguments to function ‘getenv’; expected 0, have 1
  576 |     if (new && tgetent(termbuf, getenv("TERM")) > 0) {
      |                                 ^~~~~~ ~~~~~~
greed.c:521:18: note: declared here
  521 |     extern char *getenv(), *tgetstr();
      |                  ^~~~~~
greed.c:578:18: error: too many arguments to function ‘tgetstr’; expected 0, have 2
  578 |         boldon = tgetstr("so", &tptr);
      |                  ^~~~~~~ ~~~~
greed.c:521:29: note: declared here
  521 |     extern char *getenv(), *tgetstr();
      |                             ^~~~~~~
greed.c:579:19: error: too many arguments to function ‘tgetstr’; expected 0, have 2
  579 |         boldoff = tgetstr("se", &tptr);
      |                   ^~~~~~~ ~~~~
greed.c:521:29: note: declared here
  521 |     extern char *getenv(), *tgetstr();
      |                             ^~~~~~~
make: *** [Makefile:10: greed] Error 1

[github-actions]

reverse dependencies - games/greed

None

[github-actions]

✅ sbolint - games/greed ✅

greed: NOTE: greed.SlackBuild:64: LIBDIRSUFFIX gets set, but never used.
sbolint: greed checks out OK

[github-actions]

reverse dependencies - games/hedgewars

None

[github-actions]

✅ sbolint - games/hedgewars ✅

sbolint: hedgewars checks out OK