testdisk/configure.ac

#                                               -*- Autoconf -*-
# Process this file with autoconf to produce a configure script.

AC_PREREQ(2.59)
AC_INIT([testdisk],[6.10-WIP],[grenier@cgsecurity.org])
TESTDISKDATE="May 2008"
AC_SUBST(TESTDISKDATE)
AC_DEFINE_UNQUOTED([TESTDISKDATE],"$TESTDISKDATE",[Date of release])
AC_CONFIG_AUX_DIR(config)
AC_CANONICAL_HOST([])
AC_CANONICAL_TARGET([])
AC_CONFIG_SRCDIR([config.h.in])
AC_CONFIG_HEADERS([config.h])
AM_INIT_AUTOMAKE

AC_DEFINE([_GNU_SOURCE], 1, [Enable GNU extensions])
AH_TEMPLATE([TARGET_LINUX], [Define for LINUX target])
AH_TEMPLATE([TARGET_BSD], [Define for BSD target])
AH_TEMPLATE([TARGET_SOLARIS], [Define for SOLARIS target])

# This is required to get past a stupid configure bug when making the rpm.
# Basically it is broken to specify the host as a command line argument to
# configure on its own, i.e. without giving --host=. It is supposed to work
# but doesn't. So this sets host and erases nonopt effectively moving the
# standalone command line option into the --host= form.
if test "x$nonopt" != "xNONE"; then
    host="$nonopt"
    nonopt="NONE"
fi

# Command-line options.
AC_ARG_WITH([ncurses],
    AS_HELP_STRING(--without-ncurses,disabled use of the curses/ncurses/pdcurses/curses library (default is NO)),
    [	use_ncurses="n" ])

AC_ARG_WITH(ncurses-lib,
    AS_HELP_STRING(--with-ncurses-lib=DIR,location of the ncurses library),
    [ ncurses_lib_a="${withval}/libncurses.a"
    LDFLAGS="${LDFLAGS} -L${withval}" ])

AC_ARG_WITH(ncurses-includes,
    AS_HELP_STRING(--with-ncurses-includes=DIR,location of the ncurses includes files),
    [CPPFLAGS="${CPPFLAGS} -I${withval}"])

AC_ARG_WITH([ext2fs],
    AS_HELP_STRING(--without-ext2fs,disabled use of the ext2fs library (default is NO)),
    [	use_ext2fs="n" ])

AC_ARG_WITH(ext2fs-lib,
    AS_HELP_STRING(--with-ext2fs-lib=DIR,location of the ext2fs library),
    [ ext2fs_lib_a="${withval}/libext2fs.a"
    LDFLAGS="${LDFLAGS} -L${withval}" ])

AC_ARG_WITH(ext2fs-includes,
    AS_HELP_STRING(--with-ext2fs-includes=DIR,location of the ext2fs includes files),
    [CPPFLAGS="${CPPFLAGS} -I${withval}"])

AC_ARG_WITH(com_err-lib,
    AS_HELP_STRING(--with-com_err-lib=DIR,location of the com_err library),
    [ com_err_lib_a="${withval}/libcom_err.a"
    LDFLAGS="${LDFLAGS} -L${withval}" ])

AC_ARG_WITH(com_err-includes,
    AS_HELP_STRING(--with-com_err-includes=DIR,location of the com_err includes files),
    [CPPFLAGS="${CPPFLAGS} -I${withval}"])

AC_ARG_WITH([jpeg],
    AS_HELP_STRING(--without-jpeg,disabled use of the jpeg library (default is NO)),
    [	use_jpeg="n" ])

#AC_ARG_WITH(jpegmmx-lib,
#    AS_HELP_STRING(--with-jpegmmx-lib=DIR,location of the jpeg library),
#    [ jpegmmx_lib_a="${withval}/libjpeg-mmx.a"
#    LDFLAGS="${LDFLAGS} -L${withval}" ])

AC_ARG_WITH(jpeg-lib,
    AS_HELP_STRING(--with-jpeg-lib=DIR,location of the jpeg library),
    [ jpeg_lib_a="${withval}/libjpeg.a"
    LDFLAGS="${LDFLAGS} -L${withval}" ])

AC_ARG_WITH(jpeg-includes,
    AS_HELP_STRING(--with-jpeg-includes=DIR,location of the jpeg includes files),
    [CPPFLAGS="${CPPFLAGS} -I${withval}"])

AC_ARG_WITH([ntfs], 
    AS_HELP_STRING(--without-ntfs,disabled use of the ntfs library (default is NO)),
    [	use_ntfs="n" ])

AC_ARG_WITH(ntfs-lib,
    AS_HELP_STRING(--with-ntfs-lib=DIR,location of the ntfs library),
    [ ntfs_lib_a="${withval}/libntfs.a"
      LDFLAGS="${LDFLAGS} -L${withval}"
    ])

AC_ARG_WITH(ntfs-includes,
    AS_HELP_STRING(--with-ntfs-includes=DIR,location of the ntfs includes files),
    [CPPFLAGS="${CPPFLAGS} -I${withval}"])

AC_ARG_WITH(dal-lib,
    AS_HELP_STRING(--with-dal-lib=DIR,location of the dal library),
    [ LDFLAGS="${LDFLAGS} -L${withval}" ])

AC_ARG_WITH([reiserfs], 
    AS_HELP_STRING(--without-reiserfs,disabled use of the reiserfs library (default is NO)),
    [	use_reiserfs="n" ])

AC_ARG_WITH(reiserfs-lib,
    AS_HELP_STRING(--with-reiserfs-lib=DIR,location of the reiserfs library),
    [ reiserfs_lib_a="${withval}/libreiserfs.a"
    LDFLAGS="${LDFLAGS} -L${withval}" ])

AC_ARG_WITH(reiserfs-includes,
    AS_HELP_STRING(--with-reiserfs-includes=DIR,location of the reiserfs includes files),
    [CPPFLAGS="${CPPFLAGS} -I${withval}"])

AC_ARG_WITH([ewf], 
    AS_HELP_STRING(--without-ewf,disabled use of the ewf library (default is NO)),
    [	use_ewf="n" ])

AC_ARG_WITH(ewf-lib,
    AS_HELP_STRING(--with-ewf-lib=DIR,location of the ewf library),
    [ ewf_lib_a="${withval}/libewf.a"
    LDFLAGS="${LDFLAGS} -L${withval}" ])

AC_ARG_WITH(ewf-includes,
    AS_HELP_STRING(--with-ewf-includes=DIR,location of the ewf includes files),
    [CPPFLAGS="${CPPFLAGS} -I${withval}"])

AC_ARG_WITH([iconv], 
    AS_HELP_STRING(--without-iconv,disabled use of the iconv library (default is NO)),
    [	use_iconv="n" ])

AC_ARG_WITH(iconv-lib,
    AS_HELP_STRING(--with-iconv-lib=DIR,location of the iconv library),
    [ iconv_lib_a="${withval}/libiconv.a"
    LDFLAGS="${LDFLAGS} -L${withval}" ])

AC_ARG_WITH(iconv-includes,
    AS_HELP_STRING(--with-iconv-includes=DIR,location of the iconv includes files),
    [CPPFLAGS="${CPPFLAGS} -I${withval}"])

AC_ARG_WITH(giconv-lib,
    AS_HELP_STRING(--with-giconv-lib=DIR,location of the giconv library),
    [ iconv_lib_a="${withval}/libgiconv.a"
    LDFLAGS="${LDFLAGS} -L${withval}" ])

AC_ARG_WITH(giconv-includes,
    AS_HELP_STRING(--with-giconv-includes=DIR,location of the giconv includes files),
    [CPPFLAGS="${CPPFLAGS} -I${withval}"])

AC_ARG_ENABLE([sudo],
    AS_HELP_STRING(--enable-sudo,enable use of sudo (default is NO)),
    [case "${enableval}" in
       yes) use_sudo=true ;;
       no)  use_sudo=false ;;
       *) AC_MSG_ERROR([bad value ${enableval} for --enable-sudo]) ;;
     esac],
     [use_sudo=false])

AC_ARG_WITH(sudo-bin,
    AS_HELP_STRING(--with-sudo-bin=PROG,location of the sudo binary),
    [SUDO_BIN="${withval}"])

AC_ARG_ENABLE([missing-uuid-ok],
    AS_HELP_STRING(--enable-missing-uuid-ok, force compilation even if both uuidgen and uuid_generate are missing, for developpement only (default is NO)),
    [case "${enableval}" in
       yes) missing_uuid_ok=true ;;
       no)  missing_uuid_ok=false ;;
       *) AC_MSG_ERROR([bad value ${enableval} for --enable-missing_uuid_ok]) ;;
     esac],
     [missing_uuid_ok=false])

use_icon=no

case "$target" in
*-*-*cygwin*)
  use_icon=yes
;;
*-*-*mingw*)
  use_icon=yes
;;
*-*-*djgpp)
  if test -z "$CC" ; then CC=gcc; fi
;;
*-*-*bsd*)
  AC_DEFINE([TARGET_BSD], 1)
;;
*-*-linux*)
  AC_DEFINE([TARGET_LINUX], 1)
;;
*-*-solaris*)
  AC_DEFINE([TARGET_SOLARIS], 1)
;;
esac
# freebsd 4.X doesn't have stdint.h
# progsreiserfs header check for this variable to avoid this file inclusion
# IMOO progsreiserfs need to check for headers file presence instead
case "$target" in
    *freebsd4)
	AC_DEFINE([__freebsd__], 1,[Define for freebsd4 target and progsreiserfs compatibility])
    ;;
esac

AM_CONDITIONAL(USEICON, test "$use_icon" = yes)

# Checks for programs.
AC_PROG_CC
AC_PROG_INSTALL
AC_PROG_LN_S
AC_PROG_MAKE_SET

AC_ARG_VAR(WINDRES, [Windows Resource compiler tool path])
AC_PATH_TOOL(WINDRES,windres,
	[AC_MSG_WARN(Could not find a windres tool in your PATH.)]
	)
AC_SUBST(WINDRES)

# Enable large file support.
AC_SYS_LARGEFILE

# Checks for header files.
AC_HEADER_STDC
#AC_CHECK_HEADERS([sys/types.h sys/stat.h stdlib.h stdint.h unistd.h])
AC_HEADER_SYS_WAIT
AC_CHECK_HEADERS([byteswap.h curses.h cygwin/fs.h cygwin/version.h dal/file_dal.h dal/file.h ddk/ntddstor.h dirent.h endian.h errno.h fcntl.h features.h giconv.h glob.h iconv.h io.h libgen.h limits.h linux/fs.h linux/hdreg.h linux/types.h locale.h machine/endian.h ncurses.h ncurses/curses.h ncurses/ncurses.h ncursesw/ncurses.h ntfs/version.h openssl/md5.h openssl/opensslv.h pwd.h scsi/scsi.h scsi/scsi_ioctl.h setjmp.h signal.h stdarg.h sys/cygwin.h sys/disk.h sys/disklabel.h sys/dkio.h sys/endian.h sys/ioctl.h sys/param.h sys/select.h sys/time.h sys/utsname.h sys/vtoc.h time.h utime.h varargs.h w32api/ddk/ntdddisk.h windef.h windows.h zlib.h])

#--------------------------------------------------------------------
# Check for iconv support (for Unicode conversion).
#--------------------------------------------------------------------
#
# We need to find an iconv library that matches the installed iconv.h header
# (if any). It is important to check header/library compatibility. It's
# fairly common to have iconv support both in libc and from libiconv. In that
# case, a naive check that iconv() is in libc will succeed, but if we use
# libiconv's iconv.h, it will redefine iconv() to functions that exist
# only in libiconv, and we'll get link errors.
#
# First, check if there's a working iconv in libc (ie. if the test program
# compiles and links without any extra flags).
if test -z "${use_iconv}"; then
AC_MSG_CHECKING(iconv support)
AC_LINK_IFELSE([[#include <iconv.h>
int main(int argc,char **argv) { iconv_open("foo","bar"); }]]
,
  # libc has a working iconv.
  AC_DEFINE(HAVE_ICONV,1, [Define if you have this function])
  AC_MSG_RESULT([[yes, in libc]])
  found_iconv=yes
,
  found_iconv=no
)

if test $found_iconv = no ; then
  # libc doesn't have a working iconv. Try adding -liconv and any user
  # supplied directory.

  old_LIBS="$LIBS"
  if test "${iconv_lib_a}" = ""; then
    LIBS="$LIBS -liconv"
  else
    LIBS="$LIBS ${iconv_lib_a}"
  fi
  AC_LINK_IFELSE([[#include <iconv.h>
  int main(int argc,char **argv) { iconv_open("foo","bar"); }]]
  ,
    # -liconv works.
    AC_DEFINE(HAVE_ICONV,1, [Define if you have this function])
    AC_MSG_RESULT([[yes, -liconv]])
    found_iconv=yes
  ,
    found_iconv=no
    LIBS="$old_LIBS"
  )
fi

if test $found_iconv = no ; then
  # -liconv didn't work. Try giconv.h and -lgiconv.
  # BSDs install this lib as libgiconv.
  old_LIBS="$LIBS"
  if test "${giconv_lib_a}" = ""; then
    LIBS="$LIBS -lgiconv"
  else
    LIBS="$LIBS ${giconv_lib_a}"
  fi
  AC_LINK_IFELSE([[#include <giconv.h>
  int main(int argc,char **argv) { iconv_open("foo","bar"); }]]
  ,
    AC_DEFINE(HAVE_ICONV,1, [Define if you have this function])
    AC_DEFINE(HAVE_GICONV,1, [Define if you have this function])
    AC_MSG_RESULT([[yes, -lgiconv]])
  ,
    AC_MSG_RESULT([[no]])
    LIBS="$old_LIBS"
  )
fi
else
  AC_MSG_WARN(Use of iconv function disabled)
fi


AC_CHECK_HEADERS(sys/mount.h,,,
[[
#if HAVE_SYS_PARAM_H
# include <sys/param.h>
#endif
]])

AC_CHECK_HEADERS([winbase.h],,,
[[
#ifdef HAVE_WINDEF_H
#include <windef.h>
#endif
#include <stdarg.h>
]])
AC_CHECK_HEADERS([winioctl.h],,,
[[
#ifdef HAVE_WINDEF_H
#include <windef.h>
#endif
]])

AC_CHECK_HEADERS([ext2fs/ext2_fs.h ext2fs/ext2fs.h],,
              use_ext2fs=no
              AC_MSG_WARN(Disable use of ext2fs library))

AC_CHECK_HEADERS([libewf.h],,
              use_ewf=no
              AC_MSG_WARN(Disable use of ewf library))

AC_CHECK_HEADERS([jpeglib.h],,
              use_jpeg=no
              AC_MSG_WARN(Disable use of jpeg library))

AC_CHECK_HEADERS([ntfs/attrib.h ntfs/volume.h],,
              use_ntfs=no
              AC_MSG_WARN(Disable use of ntfs library))

# Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
AC_C_BIGENDIAN(,
    [AC_DEFINE([TESTDISK_LSB], 1,
      [Define to 1 if your processor stores words with the least significant
      byte first (like Intel and VAX, unlike Motorola and SPARC).])]
    ,)
AC_C_INLINE
AC_TYPE_OFF_T
AC_TYPE_SIZE_T
AC_STRUCT_ST_BLOCKS
AC_STRUCT_TM
AC_CHECK_MEMBERS([struct stat.st_blksize])
AC_CHECK_MEMBERS([struct stat.st_rdev])
AC_CHECK_MEMBERS([dal_t.block_size],,,[#include <dal/dal.h>])
AC_CHECK_MEMBERS([dal_t.error],,,[#include <dal/dal.h>])
AC_CHECK_MEMBERS([dal_t.entity],,,[#include <dal/dal.h>])
AC_CHECK_MEMBERS([dal_t.name],,,[#include <dal/dal.h>])
AC_CHECK_MEMBERS([struct dal_ops.dev],,,[#include <dal/dal.h>])
AC_CHECK_MEMBERS([struct struct_io_manager.set_option],,,[#include <ext2fs/ext2_fs.h>
#include <ext2fs/ext2fs.h>])
AC_CHECK_MEMBERS([struct tm.tm_gmtoff])

# Checks for library functions.
AC_PROG_GCC_TRADITIONAL
# As no alternate function is provided,
# these checks should not be used if we want to cross-compile the programs
#AC_FUNC_MEMCMP
#AC_FUNC_STAT
#AC_FUNC_VPRINTF
#AC_FUNC_MALLOC

# Checks for libraries.
if test -z "${use_ncurses}"; then
  AC_SEARCH_LIBS(initscr, ncursesw ncurses pdcurses curses,
      [
        AC_DEFINE([HAVE_NCURSES],1,[Define to 1 if you have one of the ncursesw/ncurses/pdcurses/curses library.])
	AC_CHECK_LIB(tinfo,keypad,[
	  AC_DEFINE([HAVE_TINFO],1,[Define to 1 if you have the tinfo library (-ltinfo).])
	  LIBS="$LIBS -ltinfo"
	  ])
      ],AC_MSG_ERROR(No ncurses library detected))
else
  AC_MSG_WARN(Use of ncurses library disabled)
fi

if test -z "${use_ext2fs}"; then
  AC_CHECK_LIB(ext2fs,ext2fs_open,[
      AC_DEFINE([HAVE_LIBEXT2FS],1,[Define to 1 if you have the ext2fs library (-lext2fs).])
      if test "${ext2fs_lib_a}" = ""; then
        LIBS="$LIBS -lext2fs"
      else
        LIBS="$LIBS ${ext2fs_lib_a}"
      fi
      ],AC_MSG_WARN(No ext2fs library detected))
  AC_CHECK_LIB(ext2fs,ext2fs_open,[
  AC_DEFINE([HAVE_LIBCOMM_ERR],1,[Define to 1 if you have the com_err library (-lcom_err).])
      if test "${com_err_lib_a}" = ""; then
        LIBS="$LIBS -lcom_err"
      else
        LIBS="$LIBS ${com_err_lib_a}"
      fi
      ],AC_MSG_WARN(No com_err library detected))
  AC_CHECK_FUNCS([ext2fs_get_generic_bitmap_start])
else
  AC_MSG_WARN(Use of ext2fs library disabled)
fi

if test -z "${use_jpeg}"; then
#  AC_CHECK_LIB(jpeg-mmx,jpeg_std_error,[
#      AC_DEFINE([HAVE_LIBJPEG],1,[Define to 1 if you have the jpeg library (-ljpeg-mmx).])
#      if test "${jpegmmx_lib_a}" = ""; then
#        photorec_LDADD="$photorec_LDADD -ljpeg-mmx"
#      else
#        photorec_LDADD="$photorec_LDADD ${jpegmmx_lib_a}"
#      fi
#      ],AC_MSG_WARN(No jpeg-mmx library detected)
  AC_CHECK_LIB(jpeg,jpeg_std_error,[
      AC_DEFINE([HAVE_LIBJPEG],1,[Define to 1 if you have the jpeg library (-ljpeg).])
      if test "${jpeg_lib_a}" = ""; then
        photorec_LDADD="$photorec_LDADD -ljpeg"
      else
        photorec_LDADD="$photorec_LDADD ${jpeg_lib_a}"
      fi
      ],AC_MSG_WARN(No jpeg library detected))
#  )
else
  AC_MSG_WARN(Use of jpeg library disabled)
fi

if test -z "${use_ntfs}"; then
  AC_CHECK_LIB(ntfs,ntfs_device_mount,
  [
    AC_DEFINE([HAVE_LIBNTFS],1,[Define to 1 if you have the ntfs library (-lntfs).])
    if test "${ntfs_lib_a}" = ""; then
      LIBS="-lntfs $LIBS"
    else
      LIBS="${ntfs_lib_a} $LIBS"
    fi
  ],
    AC_CHECK_LIB(ntfs,ntfs_libntfs_version,
    [
      AC_DEFINE([HAVE_LIBNTFS],1,[Define to 1 if you have the ntfs library (-lntfs).])
      if test "${ntfs_lib_a}" = ""; then
        LIBS="$LIBS -lntfs"
      else
        LIBS="$LIBS ${ntfs_lib_a}"
      fi
    ],AC_MSG_WARN(No ntfs library detected))
  )
else
  AC_MSG_WARN(Use of ntfs library disabled)
fi

if test -z "${use_reiserfs}"; then
  AC_CHECK_LIB(reiserfs,libreiserfs_get_version,[
  AC_DEFINE([HAVE_LIBREISERFS],1,[Define to 1 if you have the reiserfs library (-lreiserfs).])
  if test "${reiserfs_lib_a}" = ""; then
    testdisk_LDADD="$testdisk_LDADD -lreiserfs"
  else
    testdisk_LDADD="$testdisk_LDADD ${reiserfs_lib_a}"
  fi
  ],AC_MSG_WARN(No reiserfs library detected),[-ldal])
else
  AC_MSG_WARN(Use of reiserfs library disabled)
fi
# Check for UUID functions
AC_CHECK_HEADERS([sys/uuid.h uuid/uuid.h uuid.h])
found_uuid_function=yes
AC_CHECK_FUNCS([uuidgen],,[found_uuid_function=no])
if test "${found_uuid_function}" = "no";
then
  found_uuid_function=yes
  AC_CHECK_LIB(uuid, uuid_create, , [found_uuid_function=no])
  if test "${found_uuid_function}" = "yes";
  then
    AC_CHECK_FUNCS([uuid_create])
  fi
fi

if test "${found_uuid_function}" = "no";
then
  found_uuid_function=yes
  AC_CHECK_LIB(uuid, uuid_generate, ,[ found_uuid_function=no ])
  if test "${found_uuid_function}" = "yes";
  then
    AC_CHECK_FUNCS([uuid_generate])
  fi
fi

if test "${found_uuid_function}" = "no";
then
  if test "${missing_uuid_ok}" = "true";
  then
    AC_MSG_WARN(No uuid_create or uuid_generate function in library libuuid or uuidgen function present)
  else
    AC_MSG_ERROR(No uuid_create or uuid_generate function in library libuuid or uuidgen function present)
  fi
fi

#
if test -z "${use_ewf}"; then
  OLDLIBS="$LIBS"
  AC_CHECK_LIB(z, compress2, [], AC_MSG_WARN(Missing function: compress2 in library zlib))
  AC_CHECK_LIB(crypto, MD5_Init, [], AC_MSG_WARN(Missing function: MD5_Init in library libcrypto))
  AC_CHECK_LIB(ewf,libewf_check_file_signature,[
  AC_DEFINE([HAVE_LIBEWF],1,[Define to 1 if you have the ewf library (-lewf).])
  if test "${ewf_lib_a}" = ""; then
    LIBS="-lewf $LIBS"
  else
    LIBS="${ewf_lib_a} $LIBS"
  fi
  AC_TRY_COMPILE([#include <libewf.h>],
          [void foo() { libewf_get_bytes_per_sector(NULL,NULL); }],
	  ac_cv_c_libewf_get_bytes_per_sector_have_two_arguments=yes,
	  ac_cv_c_libewf_get_bytes_per_sector_have_two_arguments=no)
  if test "${ac_cv_c_libewf_get_bytes_per_sector_have_two_arguments}" != "no"; then
        AC_DEFINE([LIBEWF_GET_BYTES_PER_SECTOR_HAVE_TWO_ARGUMENTS], 1, [Define if libewf_get_bytes_per_sector takes two parameters.])
  fi
  AC_TRY_COMPILE([#include <libewf.h>],
          [void foo() { libewf_get_media_size(NULL,NULL); }],
	  ac_cv_c_libewf_get_media_size_have_two_arguments=yes,
	  ac_cv_c_libewf_get_media_size_have_two_arguments=no)
  if test "${ac_cv_c_libewf_get_media_size_have_two_arguments}" != "no"; then
        AC_DEFINE([LIBEWF_GET_MEDIA_SIZE_HAVE_TWO_ARGUMENTS], 1, [Define if libewf_get_media_size takes two parameters.])
  fi
  ],[
  AC_MSG_WARN(No ewf library detected)
  LIBS="$OLDLIBS"
  ],[])
else
  AC_MSG_WARN(Use of ewf library disabled)
fi


#-Wconversion -Wunreachable-code -Wmissing-noreturn"
if test "$GCC" = "yes"; then                    
CFLAGS="$CFLAGS -Wall -MD -Wpointer-arith -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wshadow -Wwrite-strings -W -Wcast-align -Waggregate-return -Wbad-function-cast -Wcast-qual -Wundef -Wredundant-decls -Wsign-compare -Wnested-externs -Winline -Wdisabled-optimization -Wfloat-equal -Wmissing-format-attribute -Wmultichar"

for option in -Wdeclaration-after-statement; do
  SAVE_CFLAGS="$CFLAGS"
  CFLAGS="$CFLAGS $option"
AC_MSG_CHECKING([whether gcc understands $option])
  AC_TRY_COMPILE([], [],
      has_option=yes,
      has_option=no,)
  if test $has_option = no; then
  CFLAGS="$SAVE_CFLAGS"
  fi
AC_MSG_RESULT($has_option)
  unset has_option
  unset SAVE_CFLAGS
  done
  unset option
fi

case "$target" in
  *hpux*)
	;;
  *)
  	AC_CHECK_FUNCS(pread)
  ;;
esac

AC_CHECK_FUNCS([atexit atoll chdir chmod delscreen dirname dup2 execv ftruncate fsync getcwd geteuid lstat memset mkdir posix_fadvise posix_memalign pwrite readlink setenv setlocale signal snprintf strchr strdup strerror strncasecmp strtol touchwin utime vsnprintf])
if test "$ac_cv_func_mkdir" = "no"; then
  AC_MSG_ERROR(No mkdir function detected)
fi

if test "$ac_cv_func_execv" = "yes" -a "$use_sudo" = "true";
then
    if test -z "$SUDO_BIN"; then
        AC_PATH_PROG([SUDO], [sudo], [AC_MSG_ERROR([sudo requested but not found])])
	SUDO_BIN="$SUDO"
    fi
    AC_DEFINE_UNQUOTED([SUDO_BIN], "$SUDO_BIN", [Path to sudo for privileged operations])
fi

#reiserfs_fs_open_fast may not been detected because of lack of -ldal
OLDLIBS="$LIBS"
LIBS="$OLDLIBS $testdisk_LDADD -ldal"
AC_CHECK_FUNCS([reiserfs_fs_open_fast])
LIBS="$OLDLIBS"
AC_CHECK_FUNCS([ntfs_libntfs_version ntfs_volume_startup])

AC_SUBST(CFLAGS)
AC_SUBST(CPPFLAGS)
AC_SUBST(LDFLAGS)
AC_SUBST(testdisk_LDADD)
AC_SUBST(photorec_LDADD)

AC_CONFIG_FILES([Makefile src/Makefile linux/testdisk.spec doc_src/testdisk.1 doc_src/photorec.1])
AC_OUTPUT