dnl Process this file with autoconf to produce a configure script.
AC_INIT([fakeroot],[FAKEROOT_VERSION],[schizo@debian.org],[fakeroot])
AC_PREREQ(2.61)
AC_CONFIG_MACRO_DIR([build-aux])
LT_PREREQ(2.1a)
AC_CANONICAL_TARGET
AM_INIT_AUTOMAKE
AM_MAINTAINER_MODE
AC_CONFIG_HEADERS([config.h])
AC_PROG_MAKE_SET
LT_INIT
LT_LANG(C)

AH_BOTTOM([#if ! HAVE_BUILTIN_EXPECT
#define __builtin_expect(x, expected_value) (x)
#endif])

AC_ARG_WITH([ipc],
	    AS_HELP_STRING([--with-ipc@<:@=IPCTYPE@:>@],
			   [method of IPC to use: either sysv (default) or tcp]),
	    [ac_cv_use_ipc=$withval],
	    [ac_cv_use_ipc=sysv])

AC_CACHE_CHECK([which IPC method to use],
	       [ac_cv_use_ipc],
	       [ac_cv_use_ipc=sysv])

AC_ARG_WITH([dbformat],
	    AS_HELP_STRING([--with-dbformat@<:@=DBFORMAT@:>@],
			   [database format to use: either inode (default) or path]),
	    [ac_cv_dbformat=$withval],
	    [ac_cv_dbformat=inode])

AC_CACHE_CHECK([which database format to use],
	       [ac_cv_dbformat],
	       [ac_cv_dbformat=inode])

AH_TEMPLATE([FAKEROOT_DB_PATH], [store path in the database instead of inode and device])
if test $ac_cv_dbformat = "path"; then
AC_DEFINE_UNQUOTED(FAKEROOT_DB_PATH, [1])
fi

dnl Checks for programs.

dnl Checks for libraries.
dnl Replace `main' with a function in -ldl:
AC_CHECK_LIB(dl, dlopen)
AH_TEMPLATE([FAKEROOT_FAKENET], [use TCP instead of SysV IPC])
if test $ac_cv_use_ipc = "tcp"; then
AC_DEFINE_UNQUOTED(FAKEROOT_FAKENET, [TCP])
AC_CHECK_LIB(pthread, pthread_self)
AC_CHECK_LIB(socket, connect)
signal=HUP
else
signal=TERM
fi

AC_SUBST(signal)

dnl Checks for header files.
AC_HEADER_DIRENT
AC_HEADER_STDC
AC_CHECK_HEADERS(fcntl.h unistd.h features.h sys/feature_tests.h pthread.h stdint.h inttypes.h grp.h endian.h sys/sysmacros.h sys/socket.h sys/acl.h fts.h)

dnl Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
AC_CHECK_TYPE(mode_t, int)
AC_CHECK_TYPE(off_t, long)
AC_CHECK_TYPE(size_t, unsigned)

AH_TEMPLATE([FAKEROOT_ATTR], [for packed])
if test -n "$GCC";
then
AC_DEFINE_UNQUOTED(FAKEROOT_ATTR(x), [__attribute__ ((x))])
else
AC_DEFINE_UNQUOTED(FAKEROOT_ATTR(x), [])
fi

dnl The parameters to the wrapped functions have to match
dnl those in the system header files. I don't know how to
dnl really get the names of the paramters, but this seems to work.
AC_MSG_CHECKING([for return value and second and third argument of readlink])
readlink_buf_arg=unknown
readlink_bufsize_arg=unknown
for zeroth in ssize_t int; do
  for second in void char; do
    for third in size_t int; do
      AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <unistd.h>
        $zeroth readlink(const char *path, $second *buf, $third bufsiz);]], [[puts("hello, world");]])],
	[readlink_retval=$zeroth
	 readlink_buf_arg=$second
	 readlink_bufsize_arg=$third
        ],[])
    done
  done
done
AC_MSG_RESULT([$readlink_retval, $readlink_buf_arg, $readlink_bufsize_arg])
AH_TEMPLATE([READLINK_RETVAL_TYPE], [type of readlink return value])
AH_TEMPLATE([READLINK_BUF_TYPE], [type of readlink buf])
AH_TEMPLATE([READLINK_BUFSIZE_TYPE], [type of readlink bufsize])
AC_DEFINE_UNQUOTED(READLINK_RETVAL_TYPE, $readlink_retval)
AC_DEFINE_UNQUOTED(READLINK_BUF_TYPE, $readlink_buf_arg)
AC_DEFINE_UNQUOTED(READLINK_BUFSIZE_TYPE, $readlink_bufsize_arg)

AC_MSG_CHECKING([for first argument of setgroups])
setgroups_size_arg=unknown
for first in size_t int; do
  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#define _BSD_SOURCE
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#include <unistd.h>
#ifdef HAVE_GRP_H
#include <grp.h>
#endif
  int setgroups($first size, const gid_t *list);]], [[puts("hello, world");]])],[setgroups_size_arg=$first],[])
done
AC_MSG_RESULT([$setgroups_size_arg])
AH_TEMPLATE([SETGROUPS_SIZE_TYPE], [type of setgroups size])
AC_DEFINE_UNQUOTED(SETGROUPS_SIZE_TYPE, $setgroups_size_arg)


AH_TEMPLATE([HAVE_SEMUN_DEF], [have the semun union])
AC_MSG_CHECKING([for union semun])
  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
       # include <sys/types.h>
       # include <sys/ipc.h>
       # include <sys/sem.h>
  ]], [[
       union semun s;
  ]])],[AC_DEFINE(HAVE_SEMUN_DEF)
   AC_MSG_RESULT([yes])
  ],[ AC_MSG_RESULT([no])
  ])

AH_TEMPLATE([XMKNOD_FRTH_ARG], [fourth argument of __xmknod])
dnl glibc uses `* dev' as fourth argument of __xmknod.
dnl Although the test below should probably be more general
dnl (not just __xmknod, but also mknod etc), at the moment this
dnl seems enough, as probably glibc is the only that does this.
AC_MSG_CHECKING([for type of arg of __xmknod])
  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
       #include <sys/types.h>
       #include <sys/stat.h>
       #include <fcntl.h>
       #include <unistd.h>
  ]], [[
       int __xmknod  ( int ver,
                       const char *pathname ,
                       mode_t  mode ,  dev_t dev);
  ]])],[
   AC_DEFINE(XMKNOD_FRTH_ARG,)
   AC_MSG_RESULT([no extra *])
  ],[
   AC_DEFINE(XMKNOD_FRTH_ARG,[*])
   AC_MSG_RESULT([needs *])

  ])

dnl Possibly this should only be done if we actually have mknodat
dnl on the system.  Nothing  breaks by running the test itself though.
AH_TEMPLATE([XMKNODAT_FIFTH_ARG], [fifth argument of __xmknodat])
dnl glibc uses `* dev' as fifth argument of __xmknodat.
dnl Although the test below should probably be more general
dnl (not just __xmknodat, but also mknod etc), at the moment this
dnl seems enough, as probably glibc is the only that does this.
AC_MSG_CHECKING([for type of arg of __xmknodat])
  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
       #include <sys/types.h>
       #include <sys/stat.h>
       #include <fcntl.h>
       #include <unistd.h>
  ]], [[
       int __xmknodat  ( int ver,
                         int dirfd,
                         const char *pathname ,
                         mode_t  mode ,  dev_t dev);
  ]])],[
   AC_DEFINE(XMKNODAT_FIFTH_ARG,)
   AC_MSG_RESULT([no extra *])
  ],[
   AC_DEFINE(XMKNODAT_FIFTH_ARG,[*])
   AC_MSG_RESULT([needs *])

  ])

AH_TEMPLATE([INITGROUPS_SECOND_ARG], [second argument of initgroups])
dnl FreeBSD 4.7 uses int instead of gid_t
AC_MSG_CHECKING([for type of arg of initgroups])
  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
       #include <sys/types.h>
       #include <unistd.h>
  ]], [[
       int initgroups ( const char *user, gid_t group );
  ]])],[
   AC_DEFINE(INITGROUPS_SECOND_ARG, gid_t)
   AC_MSG_RESULT([gid_t])
  ],[
   AC_DEFINE(INITGROUPS_SECOND_ARG, int)
   AC_MSG_RESULT([not gid_t; will assume int])
  ])

AH_TEMPLATE([SETREUID_ARG], [argument of setreuid])
dnl OpenBSD 2.8 uses int instead of uid_t
AC_MSG_CHECKING([for type of arg of setreuid])
  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
       #include <sys/types.h>
       #include <unistd.h>
  ]], [[
       int setreuid ( uid_t ruid, uid_t euid );
  ]])],[
   AC_DEFINE(SETREUID_ARG, gid_t)
   AC_MSG_RESULT([gid_t])
  ],[
   AC_DEFINE(SETREUID_ARG, int)
   AC_MSG_RESULT([not uid_t; will assume int])
  ])

AH_TEMPLATE([SETREGID_ARG], [argument of setregid])
dnl OpenBSD 2.8 uses int instead of gid_t
AC_MSG_CHECKING([for type of arg of setregid])
  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
       #include <sys/types.h>
       #include <unistd.h>
  ]], [[
       int setreuid ( gid_t rgid, gid_t egid );
  ]])],[
   AC_DEFINE(SETREGID_ARG, gid_t)
   AC_MSG_RESULT([gid_t])
  ],[
   AC_DEFINE(SETREGID_ARG, int)
   AC_MSG_RESULT([not gid_t; will assume int])
  ])

AH_TEMPLATE([STAT_SECOND_ARG], [second argument of stat])
dnl Tru64 or something uses stat * instead of struct stat *
AC_MSG_CHECKING([for type of second arg to stat])
  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
       #include <sys/stat.h>
       #include <sys/types.h>
       #include <unistd.h>
  ]], [[
       int stat ( const char *file_name, struct stat *buf);
  ]])],[
   AC_DEFINE(STAT_SECOND_ARG, struct stat *)
   AC_MSG_RESULT([struct stat *])
  ],[
  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
       #include <sys/stat.h>
       #include <sys/types.h>
       #include <unistd.h>
  ]], [[
       int stat ( const char *file_name, stat *buf);
  ]])],[
   AC_DEFINE(STAT_SECOND_ARG, stat *)
   AC_MSG_RESULT([stat *])
  ],[
  AC_MSG_ERROR(cannot determine second stat argument)
  ])
])

for field in d_off d_type; do
AC_MSG_CHECKING([for ${field} in struct dirent])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
       #include <sys/types.h>
       #include <dirent.h>
  ]], [[

       struct dirent d;
       d.${field}=0
  ]])],[AC_DEFINE_UNQUOTED(STAT_HAS_${field},1)
   AC_MSG_RESULT([yes])
  ],[ AC_MSG_RESULT([no])
  ])
done

AC_CHECK_FUNCS(fchmodat fchownat fstatat mkdirat mknodat openat renameat unlinkat)

dnl find out how stat() etc are called. On linux systems, we really
dnl need to wrap (IIRC):
dnl  Linux       : __xstat
dnl  Solaris <=9 : _stat
dnl  Solaris 10  : _xstat
dnl  Digital Unix: stat

:>fakerootconfig.h.tmp

for SEARCH in %stat f%stat l%stat f%statat %stat64 f%stat64 l%stat64 f%statat64 %mknod %mknodat; do
  FUNC=`echo $SEARCH|sed -e 's/.*%//'`
  PRE=`echo $SEARCH|sed -e 's/%.*//'`
  FOUND=
  for WRAPPED in __${PRE}x${FUNC} _${PRE}x${FUNC} __${PRE}${FUNC}13 ${PRE}${FUNC}; do
    AC_CHECK_FUNCS($WRAPPED,FOUND=$WRAPPED)
dnl
dnl to unconditionally define only the _* functions, comment out the 2 lines above,
dnl and uncomment the 2 lines below.
dnl
dnl  for WRAPPED in _${PRE}${FUNC}; do
dnl    FOUND=$WRAPPED
    if test -n "$FOUND"; then
      PF=[`echo ${PRE}${FUNC}| tr '[a-z]' '[A-Z]'`]
      DEFINE_WRAP=[`echo wrap_${PRE}${FUNC}| tr '[a-z]' '[A-Z]'`]
      DEFINE_NEXT=[`echo wrap_${FOUND}| tr '[a-z]' '[A-Z]'`]
      DEFINE_ARG=[`echo wrap_${FOUND}| tr '[a-z]' '[A-Z]'`]
      AC_DEFINE_UNQUOTED(WRAP_${PF}, $FOUND)
      AC_DEFINE_UNQUOTED(WRAP_${PF}_QUOTE, "$FOUND")
      AC_DEFINE_UNQUOTED(TMP_${PF}, tmp_$FOUND)
      AC_DEFINE_UNQUOTED(NEXT_${PF}_NOARG, next_$FOUND)
      if test __"${PRE}x${FUNC}" != "${WRAPPED}" && test _"${PRE}x${FUNC}" != "${WRAPPED}" ; then
        DEF_BEGIN=""
      else
        DEF_BEGIN="a,"
      fi
      if test "${FUNC}" = "mknod"; then
        DEF_END=",d"
      elif test "${FUNC}" = "mknodat"; then
        DEF_END=",d,e"
      elif test "${FUNC}" = "statat"; then
        DEF_END=",d,e"
      elif test "${FUNC}" = "statat64"; then
        DEF_END=",d,e"
      else
        DEF_END=""
      fi
      dnl no matter what I do, the resulting define looks like
      dnl #define macro (a,b,c) (a,b,c)
      dnl with a space in between "macro" and "(". To prevent this,
      dnl I leave the space here, and remove it later with sed
      dnl at (end of configure.in)
      dnl AC_DEFINE_UNQUOTED(NEXT_${PF}(a,b,c${DEF_END}),
      dnl		     next_$FOUND(${DEF_BEGIN}b,c${DEF_END}))
      dnl AC_DEFINE_UNQUOTED(${PF}[_ARG(a,b,c${DEF_END})],
      dnl		     (${DEF_BEGIN}b,c${DEF_END}))

      dnl Anyway the trickery above also leads to automake problems
      dnl (tries to remake config.h.in, but fails). So, as a way
      dnl out, Yann DIRSON wrote this:
      {
       echo "#define NEXT_${PF}(a,b,c${DEF_END}) next_$FOUND(${DEF_BEGIN}b,c${DEF_END})"
       echo "#define ${PF}_ARG(a,b,c${DEF_END}) (${DEF_BEGIN}b,c${DEF_END})"
      } >>fakerootconfig.h.tmp

      break
    fi
  done
done

if test -r fakerootconfig.h
then
       if test "`diff fakerootconfig.h fakerootconfig.h.tmp`" = ""
       then
               AC_MSG_RESULT([fakerootconfig.h not changed])
               rm fakerootconfig.h.tmp
       else
               AC_MSG_RESULT([recreated fakerootconfig.h])
               rm fakerootconfig.h ; mv fakerootconfig.h.tmp fakerootconfig.h
       fi
else
       AC_MSG_RESULT([created fakerootconfig.h])
       mv fakerootconfig.h.tmp fakerootconfig.h
fi

dnl This should really be done intelligently.
DLSUFFIX=".so"
LDLIBPATHVAR="LD_LIBRARY_PATH"
LDPRELOADVAR="LD_PRELOAD"
LDPRELOADABS=0
LDEXTRAVAR=""
case $target_cpu:$target_os in
	(alpha*:linux*|ia64*:linux*)
		libcpath="/lib/libc.so.6.1"
		;;
	(*:linux*)
	        libcpath="/lib/libc.so.6"
		;;
	(*:k*bsd*-gnu)
	        libcpath="/lib/libc.so.0.1"
		;;
	(*:freebsd*)
		libcpath="/usr/lib/libc.so.4"
		;;
	(*:netbsd*)
		libcpath="/usr/lib/libc.so.12"
		;;
	(*:openbsd*|*:mirbsd*)
		libcpath=$(/bin/ls -1 /usr/lib/libc.so.* | \
		    sort -nt. -k3 | tail -1)
		;;
	(*:midnightbsd*)
		libcpath=$(/bin/ls -1 /lib/libc.so.* | \
		    sort -nt. -k3 | tail -1)
		;;
	(*:hpux*)
		libcpath="/usr/lib/hpux32/libc.so.1"
		;;
	(*:osf*)
		libcpath="/shlib/libc.so"
		;;
	(*:solaris*)
		libcpath="/lib/libc.so.1"
		;;
	(*:darwin*)
		libcpath="/usr/lib/libSystem.dylib"
		DLSUFFIX=".dylib"
		LDLIBPATHVAR="DYLD_LIBRARY_PATH"
		LDPRELOADVAR="DYLD_INSERT_LIBRARIES"
		LDPRELOADABS=1
		LDEXTRAVAR="DYLD_FORCE_FLAT_NAMESPACE=1"
		;;
	(*)
		AC_MSG_WARN([don't know where libc is for $target_os on
			     $target_cpu, setting to /lib/libc.so])
		libcpath="/lib/libc.so"
		;;
esac

AC_DEFINE_UNQUOTED([LIBCPATH], "$libcpath", [path to libc shared object])
AC_SUBST(DLSUFFIX)
AC_SUBST(LDLIBPATHVAR)
AC_SUBST(LDPRELOADVAR)
AC_SUBST(LDPRELOADABS)
AC_SUBST(LDEXTRAVAR)

dnl Checks for library functions.
AC_CHECK_FUNCS(strdup strstr getresuid setresuid getresgid setresgid setfsuid setfsgid fts_read)

AC_CHECK_DECLS([setenv, unsetenv])
AC_REPLACE_FUNCS([setenv])

dnl Checks for __builtin_expect
AC_LINK_IFELSE([AC_LANG_PROGRAM([[int foo (int a) { a = __builtin_expect (a, 10); return a == 10 ? 0 : 1; }]],
     [[]])],[AC_DEFINE([HAVE_BUILTIN_EXPECT], 1,
     [Define to 1 if the compiler understands __builtin_expect.])],[])

dnl kludge
AH_VERBATIM([WRAP_STAT],
[/* Stuff.  */
#define WRAP_STAT  __astat
#define WRAP_STAT_QUOTE  __astat
#define TMP_STAT  __astat
#define NEXT_STAT_NOARG  next___astat

#define WRAP_LSTAT_QUOTE  __astat
#define WRAP_LSTAT  __astat
#define TMP_LSTAT  __astat
#define NEXT_LSTAT_NOARG  next___astat

#define WRAP_FSTAT_QUOTE  __astat
#define WRAP_FSTAT  __astat
#define TMP_FSTAT  __astat
#define NEXT_FSTAT_NOARG  next___astat

#define WRAP_FSTATAT_QUOTE  __astatat
#define WRAP_FSTATAT  __astatat
#define TMP_FSTATAT  __astatat
#define NEXT_FSTATAT_NOARG  next___astatat

#define WRAP_STAT64_QUOTE  __astat64
#define WRAP_STAT64  __astat64
#define TMP_STAT64  __astat64
#define NEXT_STAT64_NOARG  next___astat64

#define WRAP_LSTAT64_QUOTE  __astat64
#define WRAP_LSTAT64  __astat64
#define TMP_LSTAT64  __astat64
#define NEXT_LSTAT64_NOARG  next___astat64

#define WRAP_FSTAT64_QUOTE  __astat64
#define WRAP_FSTAT64  __astat64
#define TMP_FSTAT64  __astat64
#define NEXT_FSTAT64_NOARG  next___astat64

#define WRAP_FSTATAT64_QUOTE  __astatat64
#define WRAP_FSTATAT64  __astatat64
#define TMP_FSTATAT64  __astatat64
#define NEXT_FSTATAT64_NOARG  next___astatat64

#define WRAP_MKNOD_QUOTE  __amknod
#define WRAP_MKNOD  __amknod
#define TMP_MKNOD  __amknod
#define NEXT_MKNOD_NOARG  next___amknod

#define WRAP_MKNODAT_QUOTE  __amknodat
#define WRAP_MKNODAT  __amknodat
#define TMP_MKNODAT  __amknodat
#define NEXT_MKNODAT_NOARG  next___amknodat
])
dnl kludge end

dnl check for b0rked Solaris (and other shells) and find one that works
_AS_DETECT_REQUIRED([echo $(echo ok) > config.$$ 2>/dev/null
		      j=`cat config.$$`
		      test "x$j" = "xok"])

case "$target_cpu:$target_os" in
	(alpha*:linux*)
	AH_TEMPLATE([STUPID_ALPHA_HACK], [stat-struct conversion hackery])
	AC_MSG_CHECKING([if we need to do stat-struct conversion hackery])
	AC_EGREP_CPP([3:3],[
#include <sys/stat.h>
_STAT_VER:_STAT_VER_GLIBC2_3_4
],
       [AC_MSG_RESULT([yes]); AC_DEFINE(STUPID_ALPHA_HACK)
CPPFLAGS="$CPPFLAGS -I\$(srcdir)/statconv/glibc/linux/alpha"
],
       [AC_MSG_RESULT([no]);])
        ;;
esac

AC_CONFIG_FILES([
   Makefile
   scripts/Makefile
   doc/Makefile doc/es/Makefile doc/fr/Makefile doc/nl/Makefile doc/sv/Makefile
   test/Makefile test/defs])
AC_OUTPUT

dnl Local variables:
dnl mode: m4
dnl End: