aclocal.m4

一个开放源代码的 AT&T 的 Korn Shell 的复制品, 支持大多数 ksh89 的特性。

      else
	CC="$CC -Xp"
      fi
      ;;			#(
    MINIX)
      AC_DEFINE(_POSIX_SOURCE)dnl
      AC_DEFINE(_POSIX_1_SOURCE, 2)dnl
      AC_DEFINE(_MINIX)dnl
      ;;			#(
    SCO)
      AC_DEFINE(OS_SCO)dnl
      ;;			#(
    OS2_EMX)
      # XXX change this to OS_OS2 or OS_OS2_EMX?
      AC_DEFINE(OS2)dnl
      ac_exe_suffix=.exe
      ;;			#(
    TITANOS)
      # Need to use cc -43 to get a shell with job control
      case "$CC" in		#((
        *-43*)  			# Already have -43 option?
	  ;;			#(
	*/cc|*/cc' '|*/cc'	'|cc|cc' '|cc'	') # Using stock compiler?
	  CC="$CC -43"
	  ;;			#(
      esac			#))
      #
      # Force dirent check to find the right thing.  There is a dirent.h
      # (and a sys/dirent.h) file which compiles, but generates garbage...
      # 
      ac_cv_header_dirent_dirent_h=no
      ac_cv_header_dirent_sys_ndir_h=no
      ac_cv_header_dirent_sys_dir_h=yes
      ;;			#(
    NEXT)
      #
      # NeXT 3.2 (other versions?) - cc -E doesn't work and /lib/cpp
      # doesn't define things that need defining, so tests that rely
      # on $CPP will break.
      #
      AC_EGREP_CPP([Bad NeXT], [#include <signal.h>
	#if !defined(SIGINT) || !defined(SIGQUIT)
	    Bad NeXT
	#endif
	], AC_MSG_ERROR([
There is a problem on NeXT boxes resulting in a bad siglist.out file being
generated (which breaks the trap and kill commands) and probably resulting
in many configuration tests not working correctly.

You appear to have this problem - see the comments on NeXT in the pdksh
README file for work arounds.]))dnl
      ;;			#(
    HPUX)
      #
      # In some versions of hpux (eg, 10.2), getwd & getcwd will dump core
      # if directory is not readble.
      #
      # name is used in test program
      AC_CACHE_CHECK(for bug in getwd, ksh_cv_hpux_getwd_bug,
	[ tmpdir=conftest.dir
	  if mkdir $tmpdir ; then
	    AC_TRY_RUN([
		int
		main()
		{
		  char buf[8 * 1024];
		  char *dirname = "conftest.dir";
		  int ok = 0;
		  if (chdir(dirname) < 0)
		    exit(2);
		  if (chmod(".", 0) < 0)
		    exit(3);
		  /* Test won't work if run as root - so don't be root */
		  if (getuid() == 0 || geteuid() == 0)
		    setresuid(1, 1, 1);	/* hpux has this */
#ifdef HAVE_GETWD /* silly since HAVE_* tests haven't been done yet */
		  {
		      extern char *getwd();
		      ok = getwd(buf) == 0;
		  }
#else
		  {
		      extern char *getcwd();
		      ok = getcwd(buf, sizeof(buf)) == 0;
		  }
#endif
		  exit(ok ? 0 : 10);
		  return ok ? 0 : 10;
		}],
	       ksh_cv_hpux_getwd_bug=no, ksh_cv_hpux_getwd_bug=yes,
	       AC_MSG_WARN(assuming getwd broken); ksh_cv_hpux_getwd_bug=yes)
	       test -d $tmpdir && rmdir $tmpdir
	  else
	     AC_MSG_ERROR(could not make temp directory for test); ksh_cv_hpux_getwd_bug=yes
	  fi])
      if test $ksh_cv_hpux_getwd_bug = yes; then
	AC_DEFINE(HPUX_GETWD_BUG)
      fi
      ;;			#(
  esac				#))
 ])dnl
dnl
dnl
dnl
dnl Some systems (eg, SunOS 4.0.3) have <termios.h> and <termio.h> but don't
dnl have the related functions/defines (eg, tcsetattr(), TCSADRAIN, etc.)
dnl or the functions don't work well with tty process groups.  Sun's bad
dnl termios can be detected by the lack of tcsetattr(), but its bad termio
dnl is harder to detect - so check for (sane) termios first, then check for
dnl BSD, then termio.
AC_DEFUN(KSH_TERM_CHECK,
 [AC_CACHE_CHECK(terminal interface, ksh_cv_term_check,
    [AC_TRY_LINK([#include <termios.h>], [
        struct termios t;
#if defined(ultrix) || defined(__ultrix__)
         Termios in ultrix 4.2 botches type-ahead when going from cooked to
         cbreak mode.  The BSD tty interface works fine though, so use it
         (would be good to know if alter versions of ultrix work).
#endif /* ultrix */
         tcgetattr(0, &t); tcsetattr(0, TCSADRAIN, &t);
      ], ksh_cv_term_check=termios,
	[AC_TRY_LINK([#include <sys/ioctl.h>], [
	    struct sgttyb sb; ioctl(0, TIOCGETP, &sb);
#ifdef TIOCGATC
	    { struct ttychars lc; ioctl(0, TIOCGATC, &lc); }
#else /* TIOCGATC */
	    { struct tchars tc; ioctl(0, TIOCGETC, &tc); }
# ifdef TIOCGLTC
	    { struct ltchars ltc; ioctl(0, TIOCGLTC, &ltc); }
# endif /* TIOCGLTC */
#endif /* TIOCGATC */
	  ], ksh_cv_term_check=bsd,
	    [AC_CHECK_HEADER(termio.h, ksh_cv_term_check=termio,
	      ksh_cv_term_check=sgtty)])])])
  if test $ksh_cv_term_check = termios; then
    AC_DEFINE(HAVE_TERMIOS_H)
dnl Don't know of a system on which this fails...
dnl     AC_CACHE_CHECK(sys/ioctl.h can be included with termios.h,
dnl       ksh_cv_sys_ioctl_with_termios,
dnl       [AC_TRY_COMPILE([#include <termios.h>
dnl #include <sys/ioctl.h>], , ksh_cv_sys_ioctl_with_termios=yes,
dnl 	ksh_cv_sys_ioctl_with_termios=no)])
dnl     if test $ksh_cv_sys_ioctl_with_termios = yes; then
dnl       AC_DEFINE(SYS_IOCTL_WITH_TERMIOS)
dnl     fi
  elif test $ksh_cv_term_check = termio; then
    AC_DEFINE(HAVE_TERMIO_H)
dnl Don't know of a system on which this fails...
dnl     AC_CACHE_CHECK(sys/ioctl.h can be included with termio.h,
dnl       ksh_cv_sys_ioctl_with_termio,
dnl       [AC_TRY_COMPILE([#include <termio.h>
dnl #include <sys/ioctl.h>], , ksh_cv_sys_ioctl_with_termio=yes,
dnl 	ksh_cv_sys_ioctl_with_termio=no)])
dnl     if test $ksh_cv_sys_ioctl_with_termio = yes; then
dnl       AC_DEFINE(SYS_IOCTL_WITH_TERMIO)
dnl     fi
  fi
 ])dnl
dnl
dnl
dnl
dnl  Check if lstat() is available - special test needed 'cause lstat only
dnl becomes visable if <sys/stat.h> is included (linux 1.3.x)...
AC_DEFUN(KSH_FUNC_LSTAT,
[AC_CACHE_CHECK(for lstat, ksh_cv_func_lstat,
[AC_TRY_LINK([
#include <sys/types.h>
#include <sys/stat.h>
	], [
	  struct stat statb;
	  lstat("/", &statb);
	],
       ksh_cv_func_lstat=yes, ksh_cv_func_lstat=no)])
if test $ksh_cv_func_lstat = yes; then
  AC_DEFINE(HAVE_LSTAT)
fi
])
dnl
dnl
dnl
dnl Modified test from autoconf's acspecific.m4: MMAP test needs to check
dnl for/use the MAP_FILE flag. (Needed for older NetBSD systems).
undefine([AC_FUNC_MMAP])dnl
AC_DEFUN(AC_FUNC_MMAP,
[AC_CHECK_FUNCS(valloc getpagesize)
AC_CACHE_CHECK(for working mmap, ac_cv_func_mmap,
[AC_TRY_RUN([
/* Thanks to Mike Haertel and Jim Avera for this test. */
#include <sys/types.h>
#include <fcntl.h>
#include <sys/mman.h>

#ifndef HAVE_GETPAGESIZE
# include <sys/param.h>
# ifdef EXEC_PAGESIZE
#  define getpagesize() EXEC_PAGESIZE
# else
#  ifdef NBPG
#   define getpagesize() NBPG * CLSIZE
#   ifndef CLSIZE
#    define CLSIZE 1
#   endif
#  else
#   ifdef NBPC
#    define getpagesize() NBPC
#   else
#    define getpagesize() PAGESIZE /* SVR4 */
#   endif
#  endif
# endif
#endif

#ifndef HAVE_VALLOC
# define valloc malloc
#endif

#ifdef __cplusplus
extern "C" { void *valloc(unsigned), *malloc(unsigned); }
#else
char *valloc(), *malloc();
#endif

#ifndef MAP_FILE
# define MAP_FILE 0
#endif /* MAP_FILE */

int
main()
{
  char *buf1, *buf2, *buf3;
  int i = getpagesize(), j;
  int i2 = i * 2;
  int fd;

  buf1 = (char *)valloc(i2);
  buf2 = (char *)valloc(i);
  buf3 = (char *)malloc(i2);
  for (j = 0; j < i2; ++j)
    *(buf1 + j) = rand();
  fd = open("conftestmmap", O_CREAT | O_RDWR, 0666);
  write(fd, buf1, i2);
  mmap(buf2, i, PROT_READ | PROT_WRITE, MAP_FILE | MAP_FIXED | MAP_PRIVATE, fd, 0);
  for (j = 0; j < i; ++j)
    if (*(buf1 + j) != *(buf2 + j))
      exit(1);
  lseek(fd, (long)i, 0);
  read(fd, buf2, i); /* read into mapped memory -- file should not change */
  /* (it does in i386 SVR4.0 - Jim Avera, [e-mail]) */
  lseek(fd, (long)0, 0);
  read(fd, buf3, i2);
  for (j = 0; j < i2; ++j)
    if (*(buf1 + j) != *(buf3 + j))
      exit(1);
  exit(0);
}
], ac_cv_func_mmap=yes, ac_cv_func_mmap=no, ac_cv_func_mmap=no)])
if test $ac_cv_func_mmap = yes; then
  AC_DEFINE(HAVE_MMAP)
fi
])
dnl
dnl
dnl
dnl Modified AC_LANG_C, AC_LANG_CPLUSPLUS, AC_TRY_RUN to handle executable
dnl extensions.
undefine([AC_LANG_C])dnl
undefine([AC_LANG_CPLUXPLUS])dnl
undefine([AC_TRY_RUN])dnl
dnl AC_LANG_C()
AC_DEFUN(AC_LANG_C,
[define([AC_LANG], [C])dnl
ac_ext=c
# CFLAGS is not in ac_cpp because -g, -O, etc. are not valid cpp options.
ac_cpp='echo $CPP $CPPFLAGS 1>&AC_FD_CC;
$CPP $CPPFLAGS'
ac_compile='echo ${CC-cc} -c $CFLAGS $CPPFLAGS conftest.$ac_ext 1>&AC_FD_CC;
${CC-cc} -c $CFLAGS $CPPFLAGS conftest.$ac_ext 1>&AC_FD_CC 2>&AC_FD_CC'
ac_link='echo ${CC-cc} -o conftest$ac_exe_suffix $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS 1>&AC_FD_CC;
${CC-cc} -o conftest$ac_exe_suffix $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS 1>&AC_FD_CC 2>&AC_FD_CC'
])

dnl AC_LANG_CPLUSPLUS()
AC_DEFUN(AC_LANG_CPLUSPLUS,
[define([AC_LANG], [CPLUSPLUS])dnl
ac_ext=C
# CXXFLAGS is not in ac_cpp because -g, -O, etc. are not valid cpp options.
ac_cpp='echo $CXXCPP $CPPFLAGS 1>&AC_FD_CC;
$CXXCPP $CPPFLAGS'
ac_compile='echo ${CXX-g++} -c $CXXFLAGS $CPPFLAGS conftest.$ac_ext 1>&AC_FD_CC;
${CXX-g++} -c $CXXFLAGS $CPPFLAGS conftest.$ac_ext 1>&AC_FD_CC 2>&AC_FD_CC'
ac_link='echo ${CXX-g++} -o conftest$ac_exe_suffix $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS 1>&AC_FD_CC;
${CXX-g++} -o conftest$ac_exe_suffix $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS 1>&AC_FD_CC 2>&AC_FD_CC'
])
dnl AC_TRY_RUN(PROGRAM, [ACTION-IF-TRUE [, ACTION-IF-FALSE
dnl            [, ACTION-IF-CROSS-COMPILING]]])
AC_DEFUN(AC_TRY_RUN,
[AC_REQUIRE([AC_PROG_CC])dnl
if test "$cross_compiling" = yes; then
  ifelse([$4], ,
    [errprint(__file__:__line__: warning: [AC_TRY_RUN] called without default to allow cross compiling
)dnl
  AC_MSG_ERROR(can not run test program while cross compiling)],
  [$4])
else
cat > conftest.$ac_ext <<EOF
[#]line __oline__ "configure"
#include "confdefs.h"
ifelse(AC_LANG, CPLUSPLUS, [#ifdef __cplusplus
extern "C" void exit(int);
#endif
])dnl
[$1]
EOF
eval $ac_link
if test -s conftest$ac_exe_suffix && (./conftest; exit) 2>/dev/null; then
  ifelse([$2], , :, [$2])
ifelse([$3], , , [else
  $3
])dnl
fi
fi
rm -fr conftest*])
dnl
dnl
dnl Like AC_HEADER_SYS_WAIT, only HAVE_SYS_WAIT_H if sys/wait.h exists and
dnl defines POSIX_SYS_WAIT if it is posix compatable.  This way things
dnl like WNOHANG, WUNTRACED can still be used.
AC_DEFUN(KSH_HEADER_SYS_WAIT,
[AC_CACHE_CHECK([for sys/wait.h that is POSIX.1 compatible], ksh_cv_header_sys_wait_h,
[AC_TRY_COMPILE([#include <sys/types.h>
#include <sys/wait.h>
#ifndef WEXITSTATUS
#define WEXITSTATUS(stat_val) ((unsigned)(stat_val) >> 8)
#endif
#ifndef WIFEXITED
#define WIFEXITED(stat_val) (((stat_val) & 255) == 0)
#endif], [int s;
wait (&s);
s = WIFEXITED (s) ? WEXITSTATUS (s) : 1;],
ksh_cv_header_sys_wait_h=yes, ksh_cv_header_sys_wait_h=no)])
if test $ksh_cv_header_sys_wait_h = yes; then
  AC_DEFINE(POSIX_SYS_WAIT)dnl
  AC_DEFINE(HAVE_SYS_WAIT_H)dnl
else
  AC_CHECK_HEADERS(sys/wait.h)dnl
fi
])
dnl
dnl
dnl Modified test from autoconf's acspecific.m4(AC_HEADER_STAT) test: need
dnl to check if S_ISSOCK == S_ISFIFO (FreeBSD).
undefine([AC_HEADER_STAT])dnl
AC_DEFUN(AC_HEADER_STAT,
[AC_CACHE_CHECK(whether stat file-mode macros are broken,
  ac_cv_header_stat_broken,
[AC_EGREP_CPP([You lose], [#include <sys/types.h>
#include <sys/stat.h>

#if defined(S_ISBLK) && defined(S_IFDIR)
# if S_ISBLK (S_IFDIR)
You lose.
# endif
#endif

#if defined(S_ISBLK) && defined(S_IFCHR)
# if S_ISBLK (S_IFCHR)
You lose.
# endif
#endif

#if defined(S_ISLNK) && defined(S_IFREG)
# if S_ISLNK (S_IFREG)
You lose.
# endif
#endif

#if defined(S_ISSOCK) && defined(S_IFREG)
# if S_ISSOCK (S_IFREG)
You lose.
# endif
#endif

#if defined(S_ISSOCK) && defined(S_IFIFO)
# if S_ISSOCK (S_IFIFO)
You lose.
# endif
#endif
], ac_cv_header_stat_broken=yes, ac_cv_header_stat_broken=no)])
if test $ac_cv_header_stat_broken = yes; then
  AC_DEFINE(STAT_MACROS_BROKEN)
fi
])
dnl
dnl
dnl Need to change the "accepts -g" test - some broken systems
dnl allow "cc -c -g ..." but fail on the link (missing -lg).
dnl LaserMoon's linux/FT is such a broken system...
undefine([AC_PROG_CC])dnl
AC_DEFUN(AC_PROG_CC,
[AC_BEFORE([$0], [AC_PROG_CPP])dnl
AC_CHECK_PROG(CC, gcc, gcc, cc)

AC_CACHE_CHECK(whether we are using GNU C, ac_cv_prog_gcc,
[dnl The semicolon is to pacify NeXT's syntax-checking cpp.
cat > conftest.c <<EOF
#ifdef __GNUC__
  yes;
#endif
EOF
if ${CC-cc} -E conftest.c 2>&AC_FD_CC | egrep yes >/dev/null 2>&1; then
  ac_cv_prog_gcc=yes
else
  ac_cv_prog_gcc=no
fi])
if test $ac_cv_prog_gcc = yes; then
  GCC=yes
  if test "${CFLAGS+set}" != set; then
    AC_CACHE_CHECK(whether ${CC-cc} accepts -g, ac_cv_prog_gcc_g,
[echo 'int main(){ return 0; }' > conftest.c
if test -z "`${CC-cc} -g conftest.c 2>&1`"; then
  ac_cv_prog_gcc_g=yes
else
  ac_cv_prog_gcc_g=no
fi
rm -f conftest*
])
    if test $ac_cv_prog_gcc_g = yes; then
      CFLAGS="-g -O"
    else
      CFLAGS="-O"
    fi
  fi
else
  GCC=
  test "${CFLAGS+set}" = set || CFLAGS="-g"
fi
])
dnl
dnl
dnl Need to change to check for ndir
dnl
undefine([AC_HEADER_DIRENT])dnl
AC_DEFUN(AC_HEADER_DIRENT,
[ac_header_dirent=no
AC_CHECK_HEADERS_DIRENT(dirent.h sys/ndir.h sys/dir.h ndir.h,
  [ac_header_dirent=$ac_hdr; break])
# Two versions of opendir et al. are in -ldir and -lx on SCO Xenix.
if test $ac_header_dirent = dirent.h; then
AC_CHECK_LIB(dir, opendir, LIBS="$LIBS -ldir", AC_CHECK_LIB(ndir, opendir, LIBS="$LIBS -lndir"))
else
AC_CHECK_LIB(x, opendir, LIBS="$LIBS -lx")
fi
])