aclocal.m4

在非GUI环境下

}
], bash_cv_struct_stat_st_blocks=yes, bash_cv_struct_stat_st_blocks=no)
])
AC_MSG_RESULT($bash_cv_struct_stat_st_blocks)
if test "$bash_cv_struct_stat_st_blocks" = "yes"; then
AC_DEFINE(HAVE_STRUCT_STAT_ST_BLOCKS)
fi
])

AC_DEFUN(BASH_CHECK_LIB_TERMCAP,
[
if test "X$bash_cv_termcap_lib" = "X"; then
_bash_needmsg=yes
else
AC_MSG_CHECKING(which library has the termcap functions)
_bash_needmsg=
fi
AC_CACHE_VAL(bash_cv_termcap_lib,
[AC_CHECK_FUNC(tgetent, bash_cv_termcap_lib=libc,
  [AC_CHECK_LIB(termcap, tgetent, bash_cv_termcap_lib=libtermcap,
    [AC_CHECK_LIB(tinfo, tgetent, bash_cv_termcap_lib=libtinfo,
        [AC_CHECK_LIB(curses, tgetent, bash_cv_termcap_lib=libcurses,
	    [AC_CHECK_LIB(ncurses, tgetent, bash_cv_termcap_lib=libncurses,
	        bash_cv_termcap_lib=gnutermcap)])])])])])
if test "X$_bash_needmsg" = "Xyes"; then
AC_MSG_CHECKING(which library has the termcap functions)
fi
AC_MSG_RESULT(using $bash_cv_termcap_lib)
if test $bash_cv_termcap_lib = gnutermcap && test -z "$prefer_curses"; then
LDFLAGS="$LDFLAGS -L./lib/termcap"
TERMCAP_LIB="./lib/termcap/libtermcap.a"
TERMCAP_DEP="./lib/termcap/libtermcap.a"
elif test $bash_cv_termcap_lib = libtermcap && test -z "$prefer_curses"; then
TERMCAP_LIB=-ltermcap
TERMCAP_DEP=
elif test $bash_cv_termcap_lib = libtinfo; then
TERMCAP_LIB=-ltinfo
TERMCAP_DEP=
elif test $bash_cv_termcap_lib = libncurses; then
TERMCAP_LIB=-lncurses
TERMCAP_DEP=
elif test $bash_cv_termcap_lib = libc; then
TERMCAP_LIB=
TERMCAP_DEP=
else
TERMCAP_LIB=-lcurses
TERMCAP_DEP=
fi
])

dnl
dnl Check for the presence of getpeername in libsocket.
dnl If libsocket is present, check for libnsl and add it to LIBS if
dnl it's there, since most systems with libsocket require linking
dnl with libnsl as well.  This should only be called if getpeername
dnl was not found in libc.
dnl
dnl NOTE: IF WE FIND GETPEERNAME, WE ASSUME THAT WE HAVE BIND/CONNECT
dnl	  AS WELL
dnl
AC_DEFUN(BASH_CHECK_LIB_SOCKET,
[
if test "X$bash_cv_have_socklib" = "X"; then
_bash_needmsg=
else
AC_MSG_CHECKING(for socket library)
_bash_needmsg=yes
fi
AC_CACHE_VAL(bash_cv_have_socklib,
[AC_CHECK_LIB(socket, getpeername,
        bash_cv_have_socklib=yes, bash_cv_have_socklib=no, -lnsl)])
if test "X$_bash_needmsg" = Xyes; then
  AC_MSG_RESULT($bash_cv_have_socklib)
  _bash_needmsg=
fi
if test $bash_cv_have_socklib = yes; then
  # check for libnsl, add it to LIBS if present
  if test "X$bash_cv_have_libnsl" = "X"; then
    _bash_needmsg=
  else
    AC_MSG_CHECKING(for libnsl)
    _bash_needmsg=yes
  fi
  AC_CACHE_VAL(bash_cv_have_libnsl,
	   [AC_CHECK_LIB(nsl, t_open,
		 bash_cv_have_libnsl=yes, bash_cv_have_libnsl=no)])
  if test "X$_bash_needmsg" = Xyes; then
    AC_MSG_RESULT($bash_cv_have_libnsl)
    _bash_needmsg=
  fi
  if test $bash_cv_have_libnsl = yes; then
    LIBS="-lsocket -lnsl $LIBS"
  else
    LIBS="-lsocket $LIBS"
  fi
  AC_DEFINE(HAVE_LIBSOCKET)
  AC_DEFINE(HAVE_GETPEERNAME)
fi
])

AC_DEFUN(BASH_STRUCT_DIRENT_D_INO,
[AC_REQUIRE([AC_HEADER_DIRENT])
AC_MSG_CHECKING(for struct dirent.d_ino)
AC_CACHE_VAL(bash_cv_dirent_has_dino,
[AC_TRY_COMPILE([
#include <stdio.h>
#include <sys/types.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif /* HAVE_UNISTD_H */
#if defined(HAVE_DIRENT_H)
# include <dirent.h>
#else
# define dirent direct
# ifdef HAVE_SYS_NDIR_H
#  include <sys/ndir.h>
# endif /* SYSNDIR */
# ifdef HAVE_SYS_DIR_H
#  include <sys/dir.h>
# endif /* SYSDIR */
# ifdef HAVE_NDIR_H
#  include <ndir.h>
# endif
#endif /* HAVE_DIRENT_H */
],[
struct dirent d; int z; z = d.d_ino;
], bash_cv_dirent_has_dino=yes, bash_cv_dirent_has_dino=no)])
AC_MSG_RESULT($bash_cv_dirent_has_dino)
if test $bash_cv_dirent_has_dino = yes; then
AC_DEFINE(HAVE_STRUCT_DIRENT_D_INO)
fi
])

AC_DEFUN(BASH_STRUCT_DIRENT_D_FILENO,
[AC_REQUIRE([AC_HEADER_DIRENT])
AC_MSG_CHECKING(for struct dirent.d_fileno)
AC_CACHE_VAL(bash_cv_dirent_has_d_fileno,
[AC_TRY_COMPILE([
#include <stdio.h>
#include <sys/types.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif /* HAVE_UNISTD_H */
#if defined(HAVE_DIRENT_H)
# include <dirent.h>
#else
# define dirent direct
# ifdef HAVE_SYS_NDIR_H
#  include <sys/ndir.h>
# endif /* SYSNDIR */
# ifdef HAVE_SYS_DIR_H
#  include <sys/dir.h>
# endif /* SYSDIR */
# ifdef HAVE_NDIR_H
#  include <ndir.h>
# endif
#endif /* HAVE_DIRENT_H */
],[
struct dirent d; int z; z = d.d_fileno;
], bash_cv_dirent_has_d_fileno=yes, bash_cv_dirent_has_d_fileno=no)])
AC_MSG_RESULT($bash_cv_dirent_has_d_fileno)
if test $bash_cv_dirent_has_d_fileno = yes; then
AC_DEFINE(HAVE_STRUCT_DIRENT_D_FILENO)
fi
])

AC_DEFUN(BASH_STRUCT_DIRENT_D_NAMLEN,
[AC_REQUIRE([AC_HEADER_DIRENT])
AC_MSG_CHECKING(for struct dirent.d_namlen)
AC_CACHE_VAL(bash_cv_dirent_has_d_namlen,
[AC_TRY_COMPILE([
#include <stdio.h>
#include <sys/types.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif /* HAVE_UNISTD_H */
#if defined(HAVE_DIRENT_H)
# include <dirent.h>
#else
# define dirent direct
# ifdef HAVE_SYS_NDIR_H
#  include <sys/ndir.h>
# endif /* SYSNDIR */
# ifdef HAVE_SYS_DIR_H
#  include <sys/dir.h>
# endif /* SYSDIR */
# ifdef HAVE_NDIR_H
#  include <ndir.h>
# endif
#endif /* HAVE_DIRENT_H */
],[
struct dirent d; int z; z = d.d_namlen;
], bash_cv_dirent_has_d_namlen=yes, bash_cv_dirent_has_d_namlen=no)])
AC_MSG_RESULT($bash_cv_dirent_has_d_namlen)
if test $bash_cv_dirent_has_d_namlen = yes; then
AC_DEFINE(HAVE_STRUCT_DIRENT_D_NAMLEN)
fi
])

AC_DEFUN(BASH_STRUCT_TIMEVAL,
[AC_MSG_CHECKING(for struct timeval in sys/time.h and time.h)
AC_CACHE_VAL(bash_cv_struct_timeval,
[
AC_EGREP_HEADER(struct timeval, sys/time.h,
		bash_cv_struct_timeval=yes,
		AC_EGREP_HEADER(struct timeval, time.h,
			bash_cv_struct_timeval=yes,
			bash_cv_struct_timeval=no))
])
AC_MSG_RESULT($bash_cv_struct_timeval)
if test $bash_cv_struct_timeval = yes; then
  AC_DEFINE(HAVE_TIMEVAL)
fi
])

AC_DEFUN(BASH_STRUCT_TIMEZONE,
[AC_MSG_CHECKING(for struct timezone in sys/time.h and time.h)
AC_CACHE_VAL(bash_cv_struct_timezone,
[
AC_EGREP_HEADER(struct timezone, sys/time.h,
		bash_cv_struct_timezone=yes,
		AC_EGREP_HEADER(struct timezone, time.h,
			bash_cv_struct_timezone=yes,
			bash_cv_struct_timezone=no))
])
AC_MSG_RESULT($bash_cv_struct_timezone)
if test $bash_cv_struct_timezone = yes; then
  AC_DEFINE(HAVE_STRUCT_TIMEZONE)
fi
])

AC_DEFUN(BASH_STRUCT_WINSIZE,
[AC_MSG_CHECKING(for struct winsize in sys/ioctl.h and termios.h)
AC_CACHE_VAL(bash_cv_struct_winsize_header,
[AC_TRY_COMPILE([#include <sys/types.h>
#include <sys/ioctl.h>], [struct winsize x;],
  bash_cv_struct_winsize_header=ioctl_h,
  [AC_TRY_COMPILE([#include <sys/types.h>
#include <termios.h>], [struct winsize x;],
  bash_cv_struct_winsize_header=termios_h, bash_cv_struct_winsize_header=other)
])])
if test $bash_cv_struct_winsize_header = ioctl_h; then
  AC_MSG_RESULT(sys/ioctl.h)
  AC_DEFINE(STRUCT_WINSIZE_IN_SYS_IOCTL)
elif test $bash_cv_struct_winsize_header = termios_h; then
  AC_MSG_RESULT(termios.h)
  AC_DEFINE(STRUCT_WINSIZE_IN_TERMIOS)
else
  AC_MSG_RESULT(not found)
fi
])

dnl Check type of signal routines (posix, 4.2bsd, 4.1bsd or v7)
AC_DEFUN(BASH_SYS_SIGNAL_VINTAGE,
[AC_REQUIRE([AC_TYPE_SIGNAL])
AC_MSG_CHECKING(for type of signal functions)
AC_CACHE_VAL(bash_cv_signal_vintage,
[
  AC_TRY_LINK([#include <signal.h>],[
    sigset_t ss;
    struct sigaction sa;
    sigemptyset(&ss); sigsuspend(&ss);
    sigaction(SIGINT, &sa, (struct sigaction *) 0);
    sigprocmask(SIG_BLOCK, &ss, (sigset_t *) 0);
  ], bash_cv_signal_vintage=posix,
  [
    AC_TRY_LINK([#include <signal.h>], [
	int mask = sigmask(SIGINT);
	sigsetmask(mask); sigblock(mask); sigpause(mask);
    ], bash_cv_signal_vintage=4.2bsd,
    [
      AC_TRY_LINK([
	#include <signal.h>
	RETSIGTYPE foo() { }], [
		int mask = sigmask(SIGINT);
		sigset(SIGINT, foo); sigrelse(SIGINT);
		sighold(SIGINT); sigpause(SIGINT);
        ], bash_cv_signal_vintage=svr3, bash_cv_signal_vintage=v7
    )]
  )]
)
])
AC_MSG_RESULT($bash_cv_signal_vintage)
if test "$bash_cv_signal_vintage" = posix; then
AC_DEFINE(HAVE_POSIX_SIGNALS)
elif test "$bash_cv_signal_vintage" = "4.2bsd"; then
AC_DEFINE(HAVE_BSD_SIGNALS)
elif test "$bash_cv_signal_vintage" = svr3; then
AC_DEFINE(HAVE_USG_SIGHOLD)
fi
])

dnl Check if the pgrp of setpgrp() can't be the pid of a zombie process.
AC_DEFUN(BASH_SYS_PGRP_SYNC,
[AC_REQUIRE([AC_FUNC_GETPGRP])
AC_MSG_CHECKING(whether pgrps need synchronization)
AC_CACHE_VAL(bash_cv_pgrp_pipe,
[AC_TRY_RUN([
#ifdef HAVE_UNISTD_H
#  include <unistd.h>
#endif
main()
{
# ifdef GETPGRP_VOID
#  define getpgID()	getpgrp()
# else
#  define getpgID()	getpgrp(0)
#  define setpgid(x,y)	setpgrp(x,y)
# endif
	int pid1, pid2, fds[2];
	int status;
	char ok;

	switch (pid1 = fork()) {
	  case -1:
	    exit(1);
	  case 0:
	    setpgid(0, getpid());
	    exit(0);
	}
	setpgid(pid1, pid1);

	sleep(2);	/* let first child die */

	if (pipe(fds) < 0)
	  exit(2);

	switch (pid2 = fork()) {
	  case -1:
	    exit(3);
	  case 0:
	    setpgid(0, pid1);
	    ok = getpgID() == pid1;
	    write(fds[1], &ok, 1);
	    exit(0);
	}
	setpgid(pid2, pid1);

	close(fds[1]);
	if (read(fds[0], &ok, 1) != 1)
	  exit(4);
	wait(&status);
	wait(&status);
	exit(ok ? 0 : 5);
}
], bash_cv_pgrp_pipe=no,bash_cv_pgrp_pipe=yes,
   [AC_MSG_WARN(cannot check pgrp synchronization if cross compiling -- defaulting to no)
    bash_cv_pgrp_pipe=no])
])
AC_MSG_RESULT($bash_cv_pgrp_pipe)
if test $bash_cv_pgrp_pipe = yes; then
AC_DEFINE(PGRP_PIPE)
fi
])

AC_DEFUN(BASH_SYS_REINSTALL_SIGHANDLERS,
[AC_REQUIRE([AC_TYPE_SIGNAL])
AC_REQUIRE([BASH_SYS_SIGNAL_VINTAGE])
AC_MSG_CHECKING([if signal handlers must be reinstalled when invoked])
AC_CACHE_VAL(bash_cv_must_reinstall_sighandlers,
[AC_TRY_RUN([
#include <signal.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif

typedef RETSIGTYPE sigfunc();

int nsigint;

#ifdef HAVE_POSIX_SIGNALS
sigfunc *
set_signal_handler(sig, handler)
     int sig;
     sigfunc *handler;
{
  struct sigaction act, oact;
  act.sa_handler = handler;
  act.sa_flags = 0;
  sigemptyset (&act.sa_mask);
  sigemptyset (&oact.sa_mask);
  sigaction (sig, &act, &oact);
  return (oact.sa_handler);
}
#else
#define set_signal_handler(s, h) signal(s, h)
#endif

RETSIGTYPE
sigint(s)
int s;
{
  nsigint++;
}

main()
{
	nsigint = 0;
	set_signal_handler(SIGINT, sigint);
	kill((int)getpid(), SIGINT);
	kill((int)getpid(), SIGINT);
	exit(nsigint != 2);
}
], bash_cv_must_reinstall_sighandlers=no, bash_cv_must_reinstall_sighandlers=yes,
   [AC_MSG_WARN(cannot check signal handling if cross compiling -- defaulting to no)
    bash_cv_must_reinstall_sighandlers=no]
)])
AC_MSG_RESULT($bash_cv_must_reinstall_sighandlers)
if test $bash_cv_must_reinstall_sighandlers = yes; then
AC_DEFINE(MUST_REINSTALL_SIGHANDLERS)
fi
])

dnl check that some necessary job control definitions are present
AC_DEFUN(BASH_SYS_JOB_CONTROL_MISSING,
[AC_REQUIRE([BASH_SYS_SIGNAL_VINTAGE])
AC_MSG_CHECKING(for presence of necessary job control definitions)
AC_CACHE_VAL(bash_cv_job_control_missing,
[AC_TRY_RUN([
#include <sys/types.h>
#ifdef HAVE_SYS_WAIT_H
#include <sys/wait.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <signal.h>

/* Add more tests in here as appropriate. */
main()
{
/* signal type */
#if !defined (HAVE_POSIX_SIGNALS) && !defined (HAVE_BSD_SIGNALS)
exit(1);
#endif

/* signals and tty control. */
#if !defined (SIGTSTP) || !defined (SIGSTOP) || !defined (SIGCONT)
exit (1);
#endif

/* process control */
#if !defined (WNOHANG) || !defined (WUNTRACED) 
exit(1);
#endif

/* Posix systems have tcgetpgrp and waitpid. */
#if defined (_POSIX_VERSION) && !defined (HAVE_TCGETPGRP)
exit(1);
#endif

#if defined (_POSIX_VERSION) && !defined (HAVE_WAITPID)
exit(1);
#endif

/* Other systems have TIOCSPGRP/TIOCGPRGP and wait3. */
#if !defined (_POSIX_VERSION) && !defined (HAVE_WAIT3)
exit(1);
#endif

exit(0);
}], bash_cv_job_control_missing=present, bash_cv_job_control_missing=missing,
    [AC_MSG_WARN(cannot check job control if cross-compiling -- defaulting to missing)