dnl Process this file with autoconf to produce a configure script.
AC_INIT(version.h)
AC_CANONICAL_HOST
AC_PREREQ(2.50)

AH_TEMPLATE([HAVE_LIBUUID], [Define for enable libuuid using.])
AH_TEMPLATE([ENABLE_DEBUG], [Define for enable debug info.])

AM_INIT_AUTOMAKE(reiserfsprogs, 3.6.21)
AM_MAINTAINER_MODE

dnl We install in /sbin, the utils are to be available on boot
dnl AC_PREFIX(/)

AM_CONFIG_HEADER(include/config.h)

AC_SUBST(sbindir)

PRESET_CFLAGS=$CFLAGS

dnl Checks for programs.
AC_PROG_CC
AC_PROG_AWK 
AC_PROG_INSTALL
AC_PROG_LN_S
AC_PROG_MAKE_SET
AC_PROG_RANLIB

dnl Checks for libraries.

# Check for LIBUUID
AC_CHECK_LIB(uuid, uuid_generate, , AC_MSG_WARN(libuuid could not be found))
UUID_LIBS="$LIBS"
AC_SUBST(UUID_LIBS)

dnl Checks for header files.
AC_HEADER_STDC
AC_CHECK_HEADERS(fcntl.h limits.h malloc.h sys/ioctl.h unistd.h uuid/uuid.h)
AC_HEADER_MAJOR

dnl Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
AC_C_INLINE
AC_TYPE_SIZE_T
AC_STRUCT_ST_RDEV

AC_ARG_ENABLE(debug, [  --enable-debug          enable extra checks], 
	      enable_debug=yes,
	      enable_debug=no
)

dnl Check for the compiler pic option.
AC_CACHE_CHECK([whether -fPIC works], [pic], [
	saved_CPPFLAGS="$CPPFLAGS"
	CPPFLAGS="-fPIC -DPIC"
	AC_TRY_COMPILE(, , [pic=yes], [pic=no])
	CPPFLAGS="$saved_CPPFLAGS"
])

# Checking for compiler warning options
AC_CACHE_CHECK([whether -Wuninitialized works], [uninitialized], [
	saved_CPPFLAGS="$CPPFLAGS"
	CPPFLAGS="-O1 -Wuninitialized"
	AC_TRY_COMPILE(, , [uninitialized=yes], [uninitialized=no])
	CPPFLAGS="$saved_CPPFLAGS"
])

AC_CACHE_CHECK([whether -Wno-unused-parameter works], [no_unused_parameter], [
	saved_CPPFLAGS="$CPPFLAGS"
	CPPFLAGS="-Wno-unused-parameter"
	AC_TRY_COMPILE(, , [no_unused_parameter=yes], [no_unused_parameter=no])
	CPPFLAGS="$saved_CPPFLAGS"
		])

AC_CACHE_CHECK([whether -Wredundant-decls works], [redundant_decls], [
	saved_CPPFLAGS="$CPPFLAGS"
	CPPFLAGS="-Wredundant-decls"
	AC_TRY_COMPILE(, , [redundant_decls=yes], [redundant_decls=no])
	CPPFLAGS="$saved_CPPFLAGS"
])

# Check for large file
AC_SYS_LARGEFILE

if test -z "${ac_cv_sys_file_offset_bits}"; then
	AC_MSG_WARN(Can't detect right _FILE_OFFSET_BITS. Will be forced to 64bit.)
	ac_cv_sys_file_offset_bits=64
fi

AC_CHECK_SIZEOF(off_t, 64, [ 
	#include <stdio.h>
	#include <sys/types.h>
	#include <unistd.h> 
])

AC_CHECK_SIZEOF(blkcnt_t, 64, [ 
	#include <stdio.h>
	#include <sys/types.h>
	#include <unistd.h> 
])

dnl Checks for library functions.
AC_PROG_GCC_TRADITIONAL
AC_FUNC_MEMCMP
AC_FUNC_STRFTIME
AC_FUNC_VPRINTF
AC_CHECK_FUNCS(strerror strstr strtol register_printf_function statfs getmntent\
	       hasmntopt memset time uname strptime ctime_r)


dnl Never enable this. It is for debugging only
AC_ARG_ENABLE(io-failure-emulation,
[  --enable-io-failure-emulation      Never use that. It is for debugging only],
[ if test "$enableval" = "yes" ; then
    echo -e "\nCarefull! IO failure emulation is ON\n"
    AC_DEFINE(IO_FAILURE_EMULATION, 1, [gets set when configure --enable-io-failure-emulation])
  fi
])

credits="./CREDITS"
AC_MSG_CHECKING(for $credits)
if test -r $credits ; then
    AC_MSG_RESULT(yes)
else
    AC_MSG_ERROR(Missing file $credits)
fi

$AWK ['
BEGIN  {in_header = 1; start = 2; count = 0}

{
    if (in_header) {
	print $0
	if ($0 == "") {
	    in_header = 0;
	    printf "char *credits[] = {\n"
	}
    } else {
	if (($0 == "") || (length($0) < 1)) {
	    start = 1;
	    count++;
	} else {
	    if (!start)
		printf "\t\\\n"
	    else if (start == 1)
		printf ",\n\n"
	    printf "\t\"" $0 "\\n\""
	    start = 0;
	}
    }
}
END    { print "\n};\n#define CREDITS_COUNT "  count }
']  $credits > include/credits.h

if test x$enable_debug = xyes; then
	if test "x" = "x$PRESET_CFLAGS"; then
		CFLAGS="-g -Wall"
	fi
	
	if test x$no_unused_parameter = xyes; then
		CFLAGS="$CFLAGS -Wno-unused-parameter"
	else
		CFLAGS="$CFLAGS -Wno-unused"
	fi
	
	if test x$redundant_decls = xyes; then
		CFLAGS="$CFLAGS -Wredundant-decls"
	fi
	
	if test x$uninitialized = xyes; then
		CFLAGS="$CFLAGS -Wuninitialized -O1"
	else
		CFLAGS="$CFLAGS -O2"
	fi
else
	if test "x" = "x$PRESET_CFLAGS"; then
		CFLAGS="-g -Wall -O2"
	fi
fi

if test x$pic = xyes; then
	CFLAGS="$CFLAGS -fPIC -DPIC"
fi

AC_OUTPUT(
    include/Makefile 
    mkreiserfs/Makefile 
    resize_reiserfs/Makefile 
    fsck/Makefile 
    lib/Makefile 
    Makefile 
    reiserfscore/Makefile 
    debugreiserfs/Makefile 
    tune/Makefile)

AC_MSG_NOTICE([

Type 'make' to compile reiserfsprogs])