dnl Configure script for GRUB.
dnl Copyright 1999 Free Software Foundation, Inc.

dnl Permission to use, copy, modify and distribute this software and its
dnl documentation is hereby granted, provided that both the copyright
dnl notice and this permission notice appear in all copies of the
dnl software, derivative works or modified versions, and any portions
dnl thereof, and that both notices appear in supporting documentation.
dnl
dnl THE FREE SOFTWARE FOUNDATION ALLOWS FREE USE OF THIS SOFTWARE IN ITS
dnl "AS IS" CONDITION.  THE FREE SOFTWARE FOUNDATION DISCLAIMS ANY
dnl LIABILITY OF ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE
dnl USE OF THIS SOFTWARE.

AC_INIT(stage2/stage2.c)
dnl Grab the package and version from the top debian/changelog entry.
AM_INIT_AUTOMAKE(
   esyscmd([sed 's/ .*$//; q' debian/changelog]),
   esyscmd([sed 's/^.*(\(.*\)).*$/\1/; q' debian/changelog]))dnl
AM_CONFIG_HEADER(config.h)
AC_PREREQ(2.13)

AC_CANONICAL_HOST

case "$host_cpu" in
i[[3456]]86) host_cpu=i386 ;;
*) AC_MSG_ERROR([unsupported CPU type]) ;;
esac

AC_SUBST(host_cpu)
AC_SUBST(host_vendor)

#
# Options
#

AM_MAINTAINER_MODE
if test "x$enable_maintainer_mode" = xyes; then
  AC_PATH_PROG(PERL,perl)
  if test -z "$PERL"; then
    AC_MSG_ERROR([perl not found])
  fi
fi

# This should be checked before AC_PROG_CC
if test "x$CFLAGS" = x; then
  default_CFLAGS=yes
fi

#
# Programs
#

AC_CHECK_TOOL(CC, gcc)
AC_PROG_CC

AC_ARG_WITH(binutils,
  [  --with-binutils=DIR     search the directory DIR to find binutils])

if test "x$with_binutils" != x; then
  AC_PATH_PROG(RANLIB, ranlib, :, "$with_binutils:$PATH")
else
  AC_PROG_RANLIB
fi

# optimization flags
if test "x$ac_cv_prog_gcc" = xyes; then
  if test "x$default_CFLAGS" = xyes; then
    CFLAGS="-g"
    # If the user specify the directory for binutils, add the option `-B'.
    if test "x$with_binutils" != x; then
      CFLAGS="-B$with_binutils/ $CFLAGS"
    fi
    STAGE1_CFLAGS="-O2"
    GRUB_CFLAGS="-O2"
    AC_CACHE_CHECK([whether optimization for size works], size_flag, [
      saved_CFLAGS=$CFLAGS
      CFLAGS="-Os -g"
      AC_TRY_COMPILE(, , size_flag=yes, size_flag=no)
      CFLAGS=$saved_CFLAGS
    ])
    if test "x$size_flag" = xyes; then
      STAGE2_CFLAGS="-Os"
    else
      STAGE2_CFLAGS="-O2 -fno-strength-reduce -fno-unroll-loops"
    fi
  fi
fi

AC_SUBST(STAGE1_CFLAGS)
AC_SUBST(STAGE2_CFLAGS)
AC_SUBST(GRUB_CFLAGS)

# Enforce coding standards.
CPPFLAGS="$CPPFLAGS -Wall -Wmissing-prototypes -Wunused"

if test "x$with_binutils" != x; then
  AC_PATH_PROG(OBJCOPY, objcopy, , "$with_binutils:$PATH")
else
  AC_CHECK_TOOL(OBJCOPY, objcopy)
fi

# Defined in acinclude.m4.
grub_ASM_USCORE
grub_PROG_OBJCOPY_ABSOLUTE
if test "x$grub_cv_prog_objcopy_absolute" != xyes; then
  AC_MSG_ERROR([GRUB requires a working absolute objcopy; upgrade your binutils])
fi

grub_ASM_PREFIX_REQUIREMENT

grub_ASM_ADDR32
if test "x$grub_cv_asm_addr32" != xyes; then
  AC_MSG_ERROR([GRUB requires GAS .code16 addr32 support; upgrade your binutils])
fi

grub_CHECK_START_SYMBOL
grub_CHECK_USCORE_START_SYMBOL
if test "x$grub_cv_check_start_symbol" != "xyes" \
	-a "x$grub_cv_check_uscore_start_symbol" != "xyes"; then
  AC_MSG_ERROR([Neither start nor _start is defined])
fi

grub_CHECK_USCORE_USCORE_BSS_START_SYMBOL
grub_CHECK_USCORE_EDATA_SYMBOL
grub_CHECK_EDATA_SYMBOL
if test "x$grub_cv_check_uscore_uscore_bss_start_symbol" != "xyes" \
	-a "x$grub_cv_check_uscore_edata_symbol" != "xyes" \
	-a "x$grub_cv_check_edata_symbol" != "xyes"; then
  AC_MSG_ERROR([None of __bss_start, _edata, edata defined])
fi

grub_CHECK_END_SYMBOL
grub_CHECK_USCORE_END_SYMBOL
if test "x$grub_cv_check_end_symbol" != "xyes" \
	-a "x$grub_cv_check_uscore_end_symbol" != "xyes"; then
  AC_MSG_ERROR([Neither end nor _end is defined])
fi

# Check for curses libraries.
AC_ARG_WITH(curses,
  [  --without-curses        do not use curses])

# Get the filename or the whole disk and open it.
# Known to work on NetBSD.
AC_CHECK_LIB(util, opendisk, [GRUB_LIBS="$GRUB_LIBS -lutil"
  AC_DEFINE(HAVE_OPENDISK, 1, [Define if opendisk() in -lutil can be used])])

# Unless the user specify --without-curses, check for curses.
if test "x$with_curses" != "xno"; then
  AC_CHECK_LIB(ncurses, wgetch, [GRUB_LIBS="$GRUB_LIBS -lncurses"
  AC_DEFINE(HAVE_LIBCURSES)],
    [AC_CHECK_LIB(curses, wgetch, [GRUB_LIBS="$GRUB_LIBS -lcurses"
       AC_DEFINE(HAVE_LIBCURSES)])])
fi

AC_SUBST(GRUB_LIBS)

# Check for headers.
AC_CHECK_HEADERS(string.h strings.h ncurses/curses.h ncurses.h curses.h)

# Check for user options.

# filesystems support.
AC_ARG_ENABLE(ext2fs,
  [  --disable-ext2fs        disable ext2fs support in Stage 2])

if test x"$enable_ext2fs" != xno; then
  FSYS_CFLAGS="$FSYS_CFLAGS -DFSYS_EXT2FS=1"
fi

AC_ARG_ENABLE(fat,
  [  --disable-fat           disable FAT support in Stage 2])

if test x"$enable_fat" != xno; then
  FSYS_CFLAGS="$FSYS_CFLAGS -DFSYS_FAT=1"
fi

AC_ARG_ENABLE(ffs,
  [  --disable-ffs           disable FFS support in Stage 2])

if test x"$enable_ffs" != xno; then
  FSYS_CFLAGS="$FSYS_CFLAGS -DFSYS_FFS=1"
fi

AC_ARG_ENABLE(minix,
  [  --disable-minix         disable Minix fs support in Stage 2])

if test x"$enable_minix" != xno; then
  FSYS_CFLAGS="$FSYS_CFLAGS -DFSYS_MINIX=1"
fi

AC_ARG_ENABLE(tftp,
  [  --enable-tftp           enable TFTP support in Stage 2])

if test x"$enable_tftp" = xyes; then
  FSYS_CFLAGS="$FSYS_CFLAGS -DFSYS_TFTP=1"
fi

AC_ARG_ENABLE(gunzip,
  [  --disable-gunzip        disable decompression in Stage 2])

if test x"$enable_gunzip" = xno; then
  FSYS_CFLAGS="$FSYS_CFLAGS -DNO_DECOMPRESSION=1"
fi

AC_SUBST(FSYS_CFLAGS)

AC_ARG_ENABLE(ne,
  [  --enable-ne             enable NE1000/2000 network driver in Stage 2])

if test x"$enable_ne" = xyes; then
  NET_CFLAGS="$NET_CFLAGS -DINCLUDE_NE=1"
fi

AC_ARG_ENABLE(nepci,
  [  --enable-nepci          enable PCI NE2000 network driver in Stage 2])

if test x"$enable_nepci" = xyes; then
  NET_CFLAGS="$NET_CFLAGS -DINCLUDE_NEPCI=1"
fi

AC_ARG_ENABLE(wd,
  [  --enable-wd             enable WD/SMC network driver in Stage 2])

if test x"$enable_wd" = xyes; then
  NET_CFLAGS="$NET_CFLAGS -DINCLUDE_WD=1"
fi

AC_ARG_ENABLE(t503,
  [  --enable-t503           enable 3C503 network driver in Stage 2])

if test x"$enable_t503" = xyes; then
  NET_CFLAGS="$NET_CFLAGS -DINCLUDE_T503=1"
fi

AC_ARG_ENABLE(t509,
  [  --enable-t509           enable 3C509 network driver in Stage 2])

if test x"$enable_t509" = xyes; then
  NET_CFLAGS="$NET_CFLAGS -DINCLUDE_T509=1"
fi

AC_ARG_ENABLE(3c59x,
  [  --enable-3c59x          enable 3C59x network driver in Stage 2])

if test x"$enable_3c59x" = xyes; then
  NET_CFLAGS="$NET_CFLAGS -DINCLUDE_3C59X=1"
fi

AC_ARG_ENABLE(lance,
  [  --enable-lance          enable LANCE network driver in Stage 2])

if test x"$enable_lance" = xyes; then
  NET_CFLAGS="$NET_CFLAGS -DINCLUDE_LANCE=1"
fi

AC_ARG_ENABLE(cs,
  [  --enable-cs             enable CS89*0 network driver in Stage 2])

if test x"$enable_cs" = xyes; then
  NET_CFLAGS="$NET_CFLAGS -DINCLUDE_CS=1"
fi

AC_ARG_ENABLE(eepro100,
  [  --enable-eepro100       enable EtherExpress100 network driver in Stage 2])

if test x"$enable_eepro100" = xyes; then
  NET_CFLAGS="$NET_CFLAGS -DINCLUDE_EEPRO100=1"
fi

AC_SUBST(NET_CFLAGS)
AM_CONDITIONAL(NETBOOT_SUPPORT, test ! -z "$NET_CFLAGS")


AC_ARG_ENABLE(ne-scan,
  [  --enable-ne-scan        set the parameter for NE network driver],
[NET_EXTRAFLAGS="$NET_EXTRAFLAGS -DNE_SCAN=$enable_ne_scan"],
[NET_EXTRAFLAGS="$NET_EXTRAFLAGS -DNE_SCAN=0x280,0x300,0x320,0x340"])

AC_ARG_ENABLE(wd-default-mem,
  [  --enable-wd-default-mem set the parameter for WD network driver],
[NET_EXTRAFLAGS="$NET_EXTRAFLAGS -DWD_DEFAULT_MEM=$enable_wd_default_mem"],
[NET_EXTRAFLAGS="$NET_EXTRAFLAGS -DWD_DEFAULT_MEM=0xCC000"])

AC_ARG_ENABLE(cs-scan,
  [  --enable-cs-scan        set the parameter for CS network driver],
[NET_EXTRAFLAGS="$NET_EXTRAFLAGS -DCS_SCAN=$enable_cs_scan"])

AC_SUBST(NET_EXTRAFLAGS)


# Output.
AC_OUTPUT([Makefile stage1/Makefile stage2/Makefile docs/Makefile \
	debian/Makefile lib/Makefile util/Makefile grub/Makefile \
	netboot/Makefile util/grub-install])