portbash/signals.sh

   1 #! /bin/sh
   2 #
   3 CC=cc
   4 export CC
   5
   6 cat > x.c <<EOF
   7 #include <signal.h>
   8
   9 main()
  10 {
  11 }
  12 EOF
  13
  14 ${CC} -E x.c > x.i || { rm -f x.c x.i ; exit 1; }
  15
  16 if egrep 'void.*signal' x.i >/dev/null 2>&1
  17 then
  18         echo '#define VOID_SIGHANDLER'
  19 fi
  20 rm -f x.c x.i
  21
  22 cat > x.c << EOF
  23 #include <signal.h>
  24 sigset_t set, oset;
  25 main()
  26 {
  27         sigemptyset(&set);
  28         sigemptyset(&oset);
  29         sigaddset(&set, 2);
  30         sigprocmask(SIG_BLOCK, &set, &oset);
  31 }
  32 EOF
  33 if ${CC} x.c >/dev/null 2>&1; then
  34         echo '#define HAVE_POSIX_SIGNALS'
  35 else
  36         cat > x.c << EOF
  37 #include <signal.h>
  38 main()
  39 {
  40         long omask = sigblock(sigmask(2));
  41         sigsetmask(omask);
  42 }
  43 EOF
  44         if ${CC} x.c >/dev/null 2>&1; then
  45                 echo '#define HAVE_BSD_SIGNALS'
  46         else
  47                 cat > x.c << EOF
  48 #include <signal.h>
  49 main()
  50 {
  51         int n;
  52         n = sighold(2);
  53         sigrelse(2);
  54 }
  55 EOF
  56                 if ${CC} x.c >/dev/null 2>&1; then
  57                         echo '#define HAVE_USG_SIGHOLD'
  58                 fi
  59         fi
  60 fi
  61
  62 rm -f x.c x.o a.out
  63
  64 exit 0