+dnl
+dnl Try to use ext2_fs.h header from libext2fs instead of from the kernel
+dnl
+AC_CHECK_HEADERS(ext2fs/ext2_fs.h)
+
+dnl
+dnl Check for ext2_ino_t type
+dnl
+AC_MSG_CHECKING(for ext2_ino_t type in libext2fs headers)
+AC_TRY_COMPILE([#include <stdio.h>
+#ifdef HAVE_EXT2FS_EXT2_FS_H
+#include <ext2fs/ext2_fs.h>
+#else
+#include <linux/ext2_fs.h>
+#endif
+#include <ext2fs/ext2fs.h>],
+[ext2_ino_t ino = 0;],
+[AC_DEFINE(HAVE_EXT2_INO_T) AC_MSG_RESULT(yes)],
+AC_MSG_RESULT(no))
+
+dnl
+dnl Check for s_journal_inum field in ext2_super_block struct
+dnl
+AC_MSG_CHECKING(for s_journal_inum field in ext2_super_block struct)
+AC_TRY_COMPILE([#include <stdio.h>
+#ifdef HAVE_EXT2FS_EXT2_FS_H
+#include <ext2fs/ext2_fs.h>
+#else
+#include <linux/ext2_fs.h>
+#endif
+#include <ext2fs/ext2fs.h>],
+[struct ext2_super_block es; es.s_journal_inum = 0;],
+[AC_DEFINE(HAVE_EXT2_JOURNAL_INUM) AC_MSG_RESULT(yes)],
+AC_MSG_RESULT(no))
+
+dnl
+dnl Check for termcap libraries
+dnl
+AC_CHECK_LIB(termcap, tgetent, [termcap_lib=yes], [termcap_lib=no])
+if test "$termcap_lib" = no; then
+ if test "$READLINE" = "-lreadline -ltermcap"; then
+ AC_MSG_ERROR(You need to install the GNU termcap library or configure without --enable-readline)
+ fi
+fi
+
+dnl
+dnl Check for readline headers and libraries
+dnl
+AC_CHECK_HEADER(readline/readline.h, [readline_h=yes], [readline_h=no])
+AC_CHECK_LIB(readline, readline, [readline_lib=yes], [readline_lib=no], "-ltermcap")
+if test "$readline_h" = no -o "$readline_lib" = no; then
+ if test "$READLINE" = "-lreadline -ltermcap"; then
+ AC_MSG_ERROR(You need to install the GNU readline library or configure without --enable-readline)
+ fi
+fi
+
+dnl
+dnl Check for zlib headers and libraries
+dnl
+AC_CHECK_HEADER(zlib.h, [zlib_h=yes], [zlib_h=no])
+AC_CHECK_LIB(z, compress2, [zlib_lib=yes], [zlib_lib=no])
+if test "$zlib_h" = yes -a "$zlib_lib" = yes; then
+ ZLIB="-lz"
+ AC_DEFINE(HAVE_ZLIB)
+else
+ ZLIB=""
+fi
+AC_SUBST(ZLIB)
+
+dnl
+dnl Check for bzlib headers and libraries
+dnl
+AC_CHECK_HEADER(bzlib.h, [bzlib_h=yes], [bzlib_h=no])
+AC_CHECK_LIB(bz2, BZ2_bzBuffToBuffCompress, [bzlib_lib=yes], [bzlib_lib=no])
+if test "$bzlib_h" = yes -a "$bzlib_lib" = yes; then
+ BZLIB="-lbz2"
+ AC_DEFINE(HAVE_BZLIB)
+else
+ BZLIB=""
+fi
+AC_SUBST(BZLIB)
+