-fi
-
-
-for ac_header in termios.h sys/reg.h string.h sys/procfs.h linux/elf.h fcntl.h signal.h sys/file.h sys/ioctl.h netinet/in.h sys/socket.h netdb.h netinet/tcp.h arpa/inet.h
-do :
- as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
-ac_fn_c_check_header_mongrel "$LINENO" "$ac_header" "$as_ac_Header" "$ac_includes_default"
-if eval test \"x\$"$as_ac_Header"\" = x"yes"; then :
- cat >>confdefs.h <<_ACEOF
-#define `$as_echo "HAVE_$ac_header" | $as_tr_cpp` 1
-_ACEOF
-
-fi
-
-done
-
-ac_fn_c_check_type "$LINENO" "pid_t" "ac_cv_type_pid_t" "$ac_includes_default"
-if test "x$ac_cv_type_pid_t" = xyes; then :
-
-else
-
-cat >>confdefs.h <<_ACEOF
-#define pid_t int
-_ACEOF
-
-fi
-
-for ac_header in vfork.h
-do :
- ac_fn_c_check_header_mongrel "$LINENO" "vfork.h" "ac_cv_header_vfork_h" "$ac_includes_default"
-if test "x$ac_cv_header_vfork_h" = xyes; then :
- cat >>confdefs.h <<_ACEOF
-#define HAVE_VFORK_H 1
-_ACEOF
-
-fi
-
-done
-
-for ac_func in fork vfork
-do :
- as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
-ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"
-if eval test \"x\$"$as_ac_var"\" = x"yes"; then :
- cat >>confdefs.h <<_ACEOF
-#define `$as_echo "HAVE_$ac_func" | $as_tr_cpp` 1
-_ACEOF
-
-fi
-done
-
-if test "x$ac_cv_func_fork" = xyes; then
- { $as_echo "$as_me:${as_lineno-$LINENO}: checking for working fork" >&5
-$as_echo_n "checking for working fork... " >&6; }
-if ${ac_cv_func_fork_works+:} false; then :
- $as_echo_n "(cached) " >&6
-else
- if test "$cross_compiling" = yes; then :
- ac_cv_func_fork_works=cross
-else
- cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h. */
-$ac_includes_default
-int
-main ()
-{
-
- /* By Ruediger Kuhlmann. */
- return fork () < 0;
-
- ;
- return 0;
-}
-_ACEOF
-if ac_fn_c_try_run "$LINENO"; then :
- ac_cv_func_fork_works=yes
-else
- ac_cv_func_fork_works=no
-fi
-rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
- conftest.$ac_objext conftest.beam conftest.$ac_ext
-fi
-
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_func_fork_works" >&5
-$as_echo "$ac_cv_func_fork_works" >&6; }
-
-else
- ac_cv_func_fork_works=$ac_cv_func_fork
-fi
-if test "x$ac_cv_func_fork_works" = xcross; then
- case $host in
- *-*-amigaos* | *-*-msdosdjgpp*)
- # Override, as these systems have only a dummy fork() stub
- ac_cv_func_fork_works=no
- ;;
- *)
- ac_cv_func_fork_works=yes
- ;;
- esac
- { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: result $ac_cv_func_fork_works guessed because of cross compilation" >&5
-$as_echo "$as_me: WARNING: result $ac_cv_func_fork_works guessed because of cross compilation" >&2;}
-fi
-ac_cv_func_vfork_works=$ac_cv_func_vfork
-if test "x$ac_cv_func_vfork" = xyes; then
- { $as_echo "$as_me:${as_lineno-$LINENO}: checking for working vfork" >&5
-$as_echo_n "checking for working vfork... " >&6; }
-if ${ac_cv_func_vfork_works+:} false; then :
- $as_echo_n "(cached) " >&6
-else
- if test "$cross_compiling" = yes; then :
- ac_cv_func_vfork_works=cross
-else
- cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h. */
-/* Thanks to Paul Eggert for this test. */
-$ac_includes_default
-#include <sys/wait.h>
-#ifdef HAVE_VFORK_H
-# include <vfork.h>
-#endif
-/* On some sparc systems, changes by the child to local and incoming
- argument registers are propagated back to the parent. The compiler
- is told about this with #include <vfork.h>, but some compilers
- (e.g. gcc -O) don't grok <vfork.h>. Test for this by using a
- static variable whose address is put into a register that is
- clobbered by the vfork. */
-static void
-#ifdef __cplusplus
-sparc_address_test (int arg)
-# else
-sparc_address_test (arg) int arg;
-#endif
-{
- static pid_t child;
- if (!child) {
- child = vfork ();
- if (child < 0) {
- perror ("vfork");
- _exit(2);
- }
- if (!child) {
- arg = getpid();
- write(-1, "", 0);
- _exit (arg);
- }
- }
-}
-
-int
-main ()
-{
- pid_t parent = getpid ();
- pid_t child;
-
- sparc_address_test (0);
-
- child = vfork ();
-
- if (child == 0) {
- /* Here is another test for sparc vfork register problems. This
- test uses lots of local variables, at least as many local
- variables as main has allocated so far including compiler
- temporaries. 4 locals are enough for gcc 1.40.3 on a Solaris
- 4.1.3 sparc, but we use 8 to be safe. A buggy compiler should
- reuse the register of parent for one of the local variables,
- since it will think that parent can't possibly be used any more
- in this routine. Assigning to the local variable will thus
- munge parent in the parent process. */
- pid_t
- p = getpid(), p1 = getpid(), p2 = getpid(), p3 = getpid(),
- p4 = getpid(), p5 = getpid(), p6 = getpid(), p7 = getpid();
- /* Convince the compiler that p..p7 are live; otherwise, it might
- use the same hardware register for all 8 local variables. */
- if (p != p1 || p != p2 || p != p3 || p != p4
- || p != p5 || p != p6 || p != p7)
- _exit(1);
-
- /* On some systems (e.g. IRIX 3.3), vfork doesn't separate parent
- from child file descriptors. If the child closes a descriptor
- before it execs or exits, this munges the parent's descriptor
- as well. Test for this by closing stdout in the child. */
- _exit(close(fileno(stdout)) != 0);
- } else {
- int status;
- struct stat st;
-
- while (wait(&status) != child)
- ;
- return (
- /* Was there some problem with vforking? */
- child < 0
-
- /* Did the child fail? (This shouldn't happen.) */
- || status
-
- /* Did the vfork/compiler bug occur? */
- || parent != getpid()
-
- /* Did the file descriptor bug occur? */
- || fstat(fileno(stdout), &st) != 0
- );
- }
-}
-_ACEOF
-if ac_fn_c_try_run "$LINENO"; then :
- ac_cv_func_vfork_works=yes
-else
- ac_cv_func_vfork_works=no
-fi
-rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
- conftest.$ac_objext conftest.beam conftest.$ac_ext
-fi
-
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_func_vfork_works" >&5
-$as_echo "$ac_cv_func_vfork_works" >&6; }
-
-fi;
-if test "x$ac_cv_func_fork_works" = xcross; then
- ac_cv_func_vfork_works=$ac_cv_func_vfork
- { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: result $ac_cv_func_vfork_works guessed because of cross compilation" >&5
-$as_echo "$as_me: WARNING: result $ac_cv_func_vfork_works guessed because of cross compilation" >&2;}
-fi
-
-if test "x$ac_cv_func_vfork_works" = xyes; then
-
-$as_echo "#define HAVE_WORKING_VFORK 1" >>confdefs.h
-
-else
-
-$as_echo "#define vfork fork" >>confdefs.h
-
-fi
-if test "x$ac_cv_func_fork_works" = xyes; then
-
-$as_echo "#define HAVE_WORKING_FORK 1" >>confdefs.h
-
-fi
-
-for ac_func in pread pwrite pread64
-do :
- as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
-ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"
-if eval test \"x\$"$as_ac_var"\" = x"yes"; then :
- cat >>confdefs.h <<_ACEOF
-#define `$as_echo "HAVE_$ac_func" | $as_tr_cpp` 1
-_ACEOF
-
-fi
-done
-
-
-ac_fn_c_check_type "$LINENO" "size_t" "ac_cv_type_size_t" "$ac_includes_default"
-if test "x$ac_cv_type_size_t" = xyes; then :
-
-else
-
-cat >>confdefs.h <<_ACEOF
-#define size_t unsigned int
-_ACEOF
-
-fi