# -*- autoconf -*-

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

# Copyright (C) 2002,2003,2004,2005,2006,2007,2008,2009,2010  Free Software Foundation, Inc.
#
# This configure.ac is free software; the author
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
# PARTICULAR PURPOSE.

# This file is shared between grub-core and util configure scripts.

# Program name transformations
AC_ARG_PROGRAM

# Optimization flag.  Allow user to override.
if test "x$CFLAGS" = x; then
  CFLAGS="$CFLAGS -Os"
fi

# Default HOST_CPPFLAGS
CPPFLAGS=''
HOST_CPPFLAGS="$HOST_CPPFLAGS -Wall -W"
HOST_CPPFLAGS="$HOST_CPPFLAGS -I\$(top_srcdir)/grub-core/include"
HOST_CPPFLAGS="$HOST_CPPFLAGS -I\$(top_builddir)/include"
HOST_CPPFLAGS="$HOST_CPPFLAGS -I\$(top_srcdir)/grub-core/gnulib"
HOST_CPPFLAGS="$HOST_CPPFLAGS -DGRUB_UTIL=1"
HOST_CPPFLAGS="$HOST_CPPFLAGS -DGRUB_LIBDIR=\\\"\$(pkglibdir)\\\""
HOST_CPPFLAGS="$HOST_CPPFLAGS -DLOCALEDIR=\\\"\$(localedir)\\\""

TARGET_CPPFLAGS="$TARGET_CPPFLAGS -Wall -W"
TARGET_CPPFLAGS="$TARGET_CPPFLAGS -I\$(top_srcdir)/include"
TARGET_CPPFLAGS="$TARGET_CPPFLAGS -I\$(top_builddir)/include"

case "$target_cpu" in
  i[[3456]]86)	target_cpu=i386 ;;
  amd64)	target_cpu=x86_64 ;;
  sparc)	target_cpu=sparc64 ;;
  mipsel|mips64el)
                target_cpu=mips;
		cpu_CPPFLAGS="-DGRUB_CPU_MIPSEL=1";
		;;
  mips|mips64)
                target_cpu=mips;
		cpu_CPPFLAGS="-DGRUB_CPU_MIPS=1";
		;;
esac

# Specify the platform (such as firmware).
AC_ARG_WITH([platform],
            AS_HELP_STRING([--with-platform=PLATFORM],
                           [select the host platform [[guessed]]]))

# Guess the platform if not specified.
if test "x$with_platform" = x; then
  case "$target_cpu"-"$target_vendor" in
    i386-apple) platform=efi ;;
    i386-*) platform=pc ;;
    x86_64-apple) platform=efi ;;
    x86_64-*) platform=pc ;;
    powerpc-*) platform=ieee1275 ;;
    powerpc64-*) platform=ieee1275 ;;
    sparc64-*) platform=ieee1275 ;;
    mips-*) platform=yeeloong ;;
    *) AC_MSG_ERROR([unsupported CPU: "$target_cpu"]) ;;
  esac
else
  platform="$with_platform"
fi

# Adjust CPU unless target was explicitly specified.
if test -z "$target_alias"; then
  case "$target_cpu"-"$platform" in
    x86_64-efi) ;;
    x86_64-emu) ;;
    x86_64-*) target_cpu=i386 ;;
    powerpc64-ieee1275) target_cpu=powerpc ;;
  esac
fi

# Check if the platform is supported, make final adjustments.
case "$target_cpu"-"$platform" in
  i386-efi) ;;
  x86_64-efi) ;;
  i386-pc) ;;
  i386-multiboot) ;;
  i386-coreboot) ;;
  i386-linuxbios) platform=coreboot ;;
  i386-ieee1275) ;;
  i386-qemu) ;;
  powerpc-ieee1275) ;;
  sparc64-ieee1275) ;;
  mips-qemu-mips) ;;
  mips-yeeloong) ;;
  *-emu) ;;
  *) AC_MSG_ERROR([platform "$platform" is not supported for target CPU "$target_cpu"]) ;;
esac

case "$target_cpu" in
  i386 | powerpc) target_m32=1 ;;
  x86_64 | sparc64) target_m64=1 ;;
esac

case "$host_os" in
  mingw32*) host_os=cygwin ;;
esac

# This normalizes the names, and creates a new variable ("host_kernel")
# while at it, since the mapping is not always 1:1 (e.g. different OSes
# using the same kernel type).
case "$host_os" in
  gnu*)				host_kernel=hurd ;;
  linux*)			host_kernel=linux ;;
  freebsd* | kfreebsd*-gnu)	host_kernel=kfreebsd ;;
  netbsd*)			host_kernel=netbsd ;;
  cygwin)			host_kernel=windows ;;
esac

case "$platform" in
  coreboot)	machine_CPPFLAGS="-DGRUB_MACHINE_COREBOOT=1" ;;
  multiboot)	machine_CPPFLAGS="-DGRUB_MACHINE_MULTIBOOT=1" ;;
  efi)		machine_CPPFLAGS="-DGRUB_MACHINE_EFI=1" ;;
  ieee1275)	machine_CPPFLAGS="-DGRUB_MACHINE_IEEE1275=1" ;;
  qemu)		machine_CPPFLAGS="-DGRUB_MACHINE_QEMU=1" ;;
  pc)		machine_CPPFLAGS="-DGRUB_MACHINE_PCBIOS=1" ;;
  emu)		machine_CPPFLAGS="-DGRUB_MACHINE_EMU=1" ;;
  yeeloong)	machine_CPPFLAGS="-DGRUB_MACHINE_MIPS_YEELOONG=1 -DGRUB_MACHINE_MIPS_BONITO=1" ;;
  qemu-mips)	machine_CPPFLAGS="-DGRUB_MACHINE_MIPS_QEMU_MIPS=1 -DGRUB_MACHINE_MIPS_BONITO=1" ;;
esac
case "$target_cpu" in
  i386)         cpu_CPPFLAGS="$cpu_CPPFLAGS -DGRUB_CPU_I386";;
  x86_64)       cpu_CPPFLAGS="$cpu_CPPFLAGS -DGRUB_CPU_X86_64";;
  powerpc)      cpu_CPPFLAGS="$cpu_CPPFLAGS -DGRUB_CPU_POWERPC";;
  mips)      	machine_CPPFLAGS="$machine_CPPFLAGS -DGRUB_MACHINE_MIPS=1" ;; # cpu_CPPFLAGS handled above
  sparc64)      cpu_CPPFLAGS="$cpu_CPPFLAGS -DGRUB_CPU_SPARC64";
                machine_CPPFLAGS="$machine_CPPFLAGS -DGRUB_MACHINE_SPARC64=1" ;;
esac

HOST_CPPFLAGS="$HOST_CPPFLAGS $cpu_CPPFLAGS $machine_CPPFLAGS"
TARGET_CPPFLAGS="$TARGET_CPPFLAGS $cpu_CPPFLAGS $machine_CPPFLAGS"

AC_SUBST(host_cpu)
AC_SUBST(host_os)
AC_SUBST(host_kernel)

AC_SUBST(target_cpu)
AC_SUBST(platform)

#
# Checks for build programs.
#

# Although cmp is listed in the GNU Coding Standards as a command which
# can used directly, OpenBSD lacks cmp in the default installation.
AC_CHECK_PROGS([CMP], [cmp])
if test "x$CMP" = x; then
  AC_MSG_ERROR([cmp is not found])
fi

for file in /usr/src/unifont.bdf /usr/share/fonts/X11/misc/unifont.pcf.gz /usr/share/fonts/unifont/unifont.pcf.gz; do
  if test -e $file ; then
    FONT_SOURCE=$file
    HOST_CPPFLAGS="$HOST_CPPFLAGS -DUSE_ASCII_FAILBACK=1"
    TARGET_CPPFLAGS="$TARGET_CPPFLAGS -DUSE_ASCII_FAILBACK=1"
    break
  fi
done

AC_PROG_RANLIB
AC_PROG_INSTALL
AC_PROG_AWK
AC_PROG_LEX
AC_PROG_YACC
AC_PROG_MAKE_SET
AC_PROG_MKDIR_P

if test "x$LEX" = x; then
  AC_MSG_ERROR([flex is not found])
else
  version=`$LEX --version | $AWK '{ split($NF,x,"."); print x[[1]]*10000+x[[2]]*100+x[[3]]; }'`
  if test -n "$version" -a "$version" -ge 20535; then
    :
  else
    AC_MSG_ERROR([flex is too old. GRUB requires 2.5.35 or above])
  fi
fi

# These are not a "must".
AC_PATH_PROG(MAKEINFO, makeinfo)

#
# Checks for host programs.
#

AC_PROG_CC
AM_PROG_CC_C_O
AM_PROG_AS

# Must be GCC.
test "x$GCC" = xyes || AC_MSG_ERROR([GCC is required])

AC_GNU_SOURCE
AM_GNU_GETTEXT([external])
AC_SYS_LARGEFILE

# Identify characteristics of the host architecture.
AC_C_BIGENDIAN
AC_CHECK_SIZEOF(void *)
AC_CHECK_SIZEOF(long)

grub_apple_cc
if test x$grub_cv_apple_cc = xyes ; then
  HOST_CPPFLAGS="$HOST_CPPFLAGS -DAPPLE_CC=1"
  HOST_CFLAGS="$HOST_CFLAGS -fnested-functions"
fi

if test "x$cross_compiling" = xyes; then
  AC_MSG_WARN([cannot generate manual pages while cross compiling])
else
  AC_PATH_PROG(HELP2MAN, help2man)
fi

# Check for functions.
AC_CHECK_FUNCS(posix_memalign memalign asprintf vasprintf)

# For grub-mkisofs
AC_HEADER_MAJOR
AC_HEADER_DIRENT
AC_CHECK_FUNCS(memmove sbrk strdup lstat getuid getgid)
AC_CHECK_HEADERS(sys/mkdev.h sys/sysmacros.h malloc.h termios.h sys/types.h)
AC_CHECK_HEADERS(unistd.h string.h strings.h sys/stat.h sys/fcntl.h limits.h)

# For opendisk() and getrawpartition() on NetBSD.
# Used in util/deviceiter.c and in util/hostdisk.c.
AC_CHECK_HEADER([util.h], [
  AC_CHECK_LIB([util], [opendisk], [
    LIBUTIL="-lutil"
    AC_DEFINE(HAVE_OPENDISK, 1, [Define if opendisk() in -lutil can be used])
  ])
  AC_CHECK_LIB([util], [getrawpartition], [
    LIBUTIL="-lutil"
    AC_DEFINE(HAVE_GETRAWPARTITION, 1, [Define if getrawpartition() in -lutil can be used])
  ])
])
AC_SUBST([LIBUTIL])

#
# Check for host and build compilers.
#
HOST_CC=$CC
AC_CHECK_PROGS(BUILD_CC, [gcc egcs cc],
                 [AC_MSG_ERROR([none of gcc, egcs and cc is found. set BUILD_CC manually.])])

#
# Check for target programs.
#

# Find tools for the target.
if test "x$target_alias" != x && test "x$host_alias" != "x$target_alias"; then
  tmp_ac_tool_prefix="$ac_tool_prefix"
  ac_tool_prefix=$target_alias-

  AC_CHECK_TOOLS(TARGET_CC, [gcc egcs cc],
                 [AC_MSG_ERROR([none of gcc, egcs and cc is found. set TARGET_CC manually.])])
  AC_CHECK_TOOL(OBJCOPY, objcopy)
  AC_CHECK_TOOL(STRIP, strip)
  AC_CHECK_TOOL(NM, nm)

  ac_tool_prefix="$tmp_ac_tool_prefix"
else
  if test "x$TARGET_CC" = x; then
    TARGET_CC=$CC
  fi
  AC_CHECK_TOOL(OBJCOPY, objcopy)
  AC_CHECK_TOOL(STRIP, strip)
  AC_CHECK_TOOL(NM, nm)
fi
AC_SUBST(HOST_CC)
AC_SUBST(BUILD_CC)
AC_SUBST(TARGET_CC)

# Test the C compiler for the target environment.
tmp_CC="$CC"
tmp_CFLAGS="$CFLAGS"
tmp_LDFLAGS="$LDFLAGS"
tmp_CPPFLAGS="$CPPFLAGS"
tmp_LIBS="$LIBS"
CC="$TARGET_CC"
CFLAGS="$TARGET_CFLAGS"
CPPFLAGS="$TARGET_CPPFLAGS"
LDFLAGS="$TARGET_LDFLAGS"
LIBS=""

# debug flags.
TARGET_CFLAGS="$TARGET_CFLAGS -Wall -W -Wshadow -Wpointer-arith -Wmissing-prototypes -Wundef -Wstrict-prototypes -g"
TARGET_CCASFLAGS="$TARGET_CCASFLAGS -g"

# Force no alignment to save space on i386.
if test "x$target_cpu" = xi386; then
  AC_CACHE_CHECK([whether -falign-loops works], [grub_cv_cc_falign_loop], [
    CFLAGS="$CFLAGS -falign-loops=1"
    AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
        [grub_cv_cc_falign_loop=yes],
	[grub_cv_cc_falign_loop=no])
  ])

  if test "x$grub_cv_cc_falign_loop" = xyes; then
    TARGET_CFLAGS="$TARGET_CFLAGS -falign-jumps=1 -falign-loops=1 -falign-functions=1"
  else
    TARGET_CFLAGS="$TARGET_CFLAGS -malign-jumps=1 -malign-loops=1 -malign-functions=1"
  fi

  # Some toolchains enable these features by default, but they need
  # registers that aren't set up properly in GRUB.
  TARGET_CFLAGS="$TARGET_CFLAGS -mno-mmx -mno-sse -mno-sse2 -mno-3dnow"
fi

# By default, GCC 4.4 generates .eh_frame sections containing unwind
# information in some cases where it previously did not. GRUB doesn't need
# these and they just use up vital space. Restore the old compiler
# behaviour.
AC_CACHE_CHECK([whether -fno-dwarf2-cfi-asm works], [grub_cv_cc_fno_dwarf2_cfi_asm], [
  SAVE_CFLAGS="$CFLAGS"
  CFLAGS="$CFLAGS -fno-dwarf2-cfi-asm"
  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
      [grub_cv_cc_fno_dwarf2_cfi_asm=yes],
      [grub_cv_cc_fno_dwarf2_cfi_asm=no])
  CFLAGS="$SAVE_CFLAGS"
])

if test "x$grub_cv_cc_fno_dwarf2_cfi_asm" = xyes; then
  TARGET_CFLAGS="$TARGET_CFLAGS -fno-dwarf2-cfi-asm"
fi

grub_apple_target_cc
if test x$grub_cv_apple_target_cc = xyes ; then
  TARGET_CPPFLAGS="$TARGET_CPPFLAGS -DAPPLE_CC=1"
  TARGET_CFLAGS="$TARGET_CFLAGS -fnested-functions"

  CFLAGS="$CFLAGS -DAPPLE_CC=1 -fnested-functions"
  TARGET_APPLE_CC=1
  AC_CHECK_PROG([OBJCONV], [objconv], [objconv], [])
  if test "x$OBJCONV" = x ; then
     AC_CHECK_PROG([OBJCONV], [objconv], [./objconv], [], [.])
  fi
  if test "x$OBJCONV" = x ; then
    AC_MSG_ERROR([objconv not found which is required when building with apple compiler])
  fi
  TARGET_IMG_LDSCRIPT=
  TARGET_IMG_CFLAGS="-static"
  TARGET_IMG_LDFLAGS='-nostdlib -static -Wl,-preload -Wl,-segalign,20 -Wl,-image_base,'
  TARGET_IMG_LDFLAGS_AC='-nostdlib -static -Wl,-preload -Wl,-segalign,20 -Wl,-image_base,'
else
  TARGET_APPLE_CC=0
# Use linker script if present, otherwise use builtin -N script.
if test -f "${srcdir}/conf/${target_cpu}-${platform}-${host_os}-img-ld.sc"; then
  TARGET_IMG_LDSCRIPT='$(top_srcdir)'"/conf/${target_cpu}-${platform}-${host_os}-img-ld.sc"
  TARGET_IMG_LDFLAGS="-Wl,-T${TARGET_IMG_LDSCRIPT}  -Wl,-Ttext,"
  TARGET_IMG_LDFLAGS_AC="-Wl,-T${srcdir}/conf/${target_cpu}-${platform}-${host_os}-img-ld.sc  -Wl,-Ttext,"
else
  TARGET_IMG_LDSCRIPT=
  TARGET_IMG_LDFLAGS='-Wl,-N  -Wl,-Ttext,'
  TARGET_IMG_LDFLAGS_AC='-Wl,-N  -Wl,-Ttext,'
fi
TARGET_IMG_CFLAGS=
fi

# For platforms where ELF is not the default link format.
AC_MSG_CHECKING([for command to convert module to ELF format])
case "${host_os}" in
  cygwin) TARGET_OBJ2ELF='grub-pe2elf';
# FIXME: put proper test here
  AC_DEFINE([NEED_REGISTER_FRAME_INFO], 1,
	    [Define to 1 if GCC generates calls to __register_frame_info()])
  ;;
  *) ;;
esac
AC_MSG_RESULT([$TARGET_OBJ2ELF])

if test "x$target_m32" = x1; then
  # Force 32-bit mode.
  TARGET_CFLAGS="$TARGET_CFLAGS -m32"
  TARGET_CCASFLAGS="$TARGET_CCASFLAGS -m32"
  TARGET_LDFLAGS="$TARGET_LDFLAGS -m32"
  TARGET_MODULE_FORMAT="elf32"
fi

if test "x$target_m64" = x1; then
  # Force 64-bit mode.
  TARGET_CFLAGS="$TARGET_CFLAGS -m64"
  TARGET_CCASFLAGS="$TARGET_CCASFLAGS -m64"
  TARGET_LDFLAGS="$TARGET_LDFLAGS -m64"
  TARGET_MODULE_FORMAT="elf64"
fi

if test "$target_cpu"-"$platform" = x86_64-efi; then
  # Use large model to support 4G memory
  AC_CACHE_CHECK([whether option -mcmodel=large works], grub_cv_cc_mcmodel, [
    SAVED_CFLAGS=$CFLAGS
    CFLAGS="$CFLAGS -m64 -mcmodel=large"
    AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
		      [grub_cv_cc_mcmodel=yes],
		      [grub_cv_cc_mcmodel=no])
  ])
  if test "x$grub_cv_cc_mcmodel" = xno; then
    AC_MSG_ERROR([-mcmodel=large not supported. Upgrade your gcc.])
  else
    TARGET_CFLAGS="$TARGET_CFLAGS -mcmodel=large"
  fi

  # EFI writes to stack below %rsp, we must not use the red zone
  AC_CACHE_CHECK([whether option -mno-red-zone works], grub_cv_cc_no_red_zone, [
    CFLAGS="$CFLAGS -m64 -mno-red-zone"
    AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
		      [grub_cv_cc_no_red_zone=yes],
		      [grub_cv_cc_no_red_zone=no])
  ])
  if test "x$grub_cv_cc_no_red_zone" = xno; then
    AC_MSG_ERROR([-mno-red-zone not supported, upgrade your gcc])
  fi

  TARGET_CFLAGS="$TARGET_CFLAGS -mno-red-zone"
fi

#
# Compiler features.
#

# Need __enable_execute_stack() for nested function trampolines?
grub_CHECK_ENABLE_EXECUTE_STACK

# Position independent executable.
grub_CHECK_PIE
[# Need that, because some distributions ship compilers that include
# `-fPIE' in the default specs.
if [ x"$pie_possible" = xyes ]; then
  TARGET_CFLAGS="$TARGET_CFLAGS -fno-PIE"
fi]

# Smashing stack protector.
grub_CHECK_STACK_PROTECTOR
# Need that, because some distributions ship compilers that include
# `-fstack-protector' in the default specs.
if test "x$ssp_possible" = xyes; then
  TARGET_CFLAGS="$TARGET_CFLAGS -fno-stack-protector"
fi
grub_CHECK_STACK_ARG_PROBE
# Cygwin's GCC uses alloca() to probe the stackframe on static
# stack allocations above some threshold.
if test x"$sap_possible" = xyes; then
  TARGET_CFLAGS="$TARGET_CFLAGS -mno-stack-arg-probe"
fi

AC_ARG_ENABLE([werror],
	      [AS_HELP_STRING([--disable-werror],
                             [do not use -Werror when building GRUB])])
if test x"$enable_werror" != xno ; then
  TARGET_CFLAGS="$TARGET_CFLAGS -Werror"
fi

AC_SUBST(TARGET_MODULE_FORMAT)
AC_SUBST(OBJCONV)
AC_SUBST(TARGET_APPLE_CC)

AC_SUBST(TARGET_CFLAGS)
AC_SUBST(TARGET_LDFLAGS)
AC_SUBST(TARGET_CPPFLAGS)
AC_SUBST(TARGET_CCASFLAGS)

AC_SUBST(HOST_CFLAGS)
AC_SUBST(HOST_LDFLAGS)
AC_SUBST(HOST_CPPFLAGS)
AC_SUBST(HOST_CCASFLAGS)

# Set them to their new values for the tests below.
CC="$TARGET_CC"
if test "x$TARGET_APPLE_CC" = x1 ; then
CFLAGS="$TARGET_CFLAGS -nostdlib -Wno-error"
else
CFLAGS="$TARGET_CFLAGS -nostdlib -Wl,--defsym,___main=0x8100 -Wno-error"
fi
CPPFLAGS="$TARGET_CPPFLAGS"
LDFLAGS="$TARGET_LDFLAGS"
LIBS=-lgcc

grub_ASM_USCORE
if test x$grub_cv_asm_uscore = xyes; then
CFLAGS="$CFLAGS -Wl,--defsym,_abort=_main"
else
CFLAGS="$CFLAGS -Wl,--defsym,abort=main"
fi

# Check for libgcc symbols
AC_CHECK_FUNCS(__bswapsi2 __bswapdi2 __ashldi3 __ashrdi3 __lshrdi3 __trampoline_setup __ucmpdi2 _restgpr_14_x)

if test "x$TARGET_APPLE_CC" = x1 ; then
CFLAGS="$TARGET_CFLAGS -nostdlib"
else
CFLAGS="$TARGET_CFLAGS -nostdlib -Wl,--defsym,___main=0x8100"
fi
LIBS=""

# Defined in aclocal.m4.
grub_PROG_TARGET_CC
if test "x$TARGET_APPLE_CC" != x1 ; then
grub_PROG_OBJCOPY_ABSOLUTE
fi
grub_PROG_LD_BUILD_ID_NONE
if test "x$target_cpu" = xi386; then
  if test "$platform" != emu && test "x$TARGET_APPLE_CC" != x1 ; then
    if test ! -z "$TARGET_IMG_LDSCRIPT"; then
      # Check symbols provided by linker script.
      CFLAGS="$TARGET_CFLAGS -nostdlib ${TARGET_IMG_LDFLAGS_AC}8000 -Wl,--defsym,___main=0x8100"
    fi
    grub_CHECK_BSS_START_SYMBOL
    grub_CHECK_END_SYMBOL
  fi
  CFLAGS="$TARGET_CFLAGS"
  grub_I386_ASM_PREFIX_REQUIREMENT
  grub_I386_ASM_ADDR32
  grub_I386_ASM_ABSOLUTE_WITHOUT_ASTERISK
else
  AC_DEFINE([NESTED_FUNC_ATTR], [], [Catch gcc bug])
fi

AH_BOTTOM([#if defined(__i386__) && !defined(GRUB_UTIL)
#define NESTED_FUNC_ATTR __attribute__ ((__regparm__ (1)))
#else
#define NESTED_FUNC_ATTR
#endif])

AC_ARG_ENABLE([efiemu],
	      [AS_HELP_STRING([--enable-efiemu],
                             [build and install the efiemu runtimes (default=guessed)])])
if test x"$enable_efiemu" = xno ; then
  efiemu_excuse="explicitly disabled"
fi
if test x"$efiemu_excuse" = x ; then
  AC_CACHE_CHECK([whether options required for efiemu work], grub_cv_cc_efiemu, [
    CFLAGS="$CFLAGS -m64 -mcmodel=large -mno-red-zone -nostdlib"
    AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
		      [grub_cv_cc_efiemu=yes],
		      [grub_cv_cc_efiemu=no])
  ])
  if test x$grub_cv_cc_efiemu = xno; then
     efiemu_excuse="cannot compile with -m64 -mcmodel=large -mno-red-zone -nostdlib"
  fi
fi
if test x"$enable_efiemu" = xyes && test x"$efiemu_excuse" != x ; then
  AC_MSG_ERROR([efiemu runtime was explicitly requested but can't be compiled])
fi
if test x"$efiemu_excuse" = x ; then
enable_efiemu=yes
else
enable_efiemu=no
fi
AC_SUBST([enable_efiemu])

if test "$platform" != emu; then
AC_CACHE_CHECK([whether -nostdinc -isystem works], [grub_cv_cc_isystem], [
  SAVED_CPPFLAGS="$CPPFLAGS"
  CPPFLAGS="$TARGET_CPPFLAGS -nostdinc -isystem `$TARGET_CC -print-file-name=include`"
  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stdarg.h>
int va_arg_func (int fixed, va_list args);]], [[]])],
      [grub_cv_cc_isystem=yes],
      [grub_cv_cc_isystem=no])
  CPPFLAGS="$SAVED_CPPFLAGS"
])

if test x"$grub_cv_cc_isystem" = xyes ; then
  TARGET_CPPFLAGS="$TARGET_CPPFLAGS -nostdinc -isystem `$TARGET_CC -print-file-name=include`"
fi
fi

# Restore the flags.
CC="$tmp_CC"
CFLAGS="$tmp_CFLAGS"
CPPFLAGS="$tmp_CPPFLAGS"
LDFLAGS="$tmp_LDFLAGS"
LIBS="$tmp_LIBS"

#
# Check for options.
#

# Memory manager debugging.
AC_ARG_ENABLE([mm-debug],
	      AS_HELP_STRING([--enable-mm-debug],
                             [include memory manager debugging]),
              [AC_DEFINE([MM_DEBUG], [1],
                         [Define to 1 if you enable memory manager debugging.])])

AC_ARG_ENABLE([grub-emu-usb],
	      [AS_HELP_STRING([--enable-grub-emu-usb],
                             [build and install the `grub-emu' debugging utility with USB support (default=guessed)])])

AC_ARG_ENABLE([grub-emu-sdl],
	      [AS_HELP_STRING([--enable-grub-emu-sdl],
                             [build and install the `grub-emu' debugging utility with SDL support (default=guessed)])])

AC_ARG_ENABLE([grub-emu-pci],
	      [AS_HELP_STRING([--enable-grub-emu-pci],
                             [build and install the `grub-emu' debugging utility with PCI support (potentially dangerous) (default=no)])])

if test "$platform" = emu; then
  missing_ncurses=
[# Check for curses libraries.]
  AC_CHECK_LIB([ncurses], [wgetch], [LIBCURSES="-lncurses"],
    [AC_CHECK_LIB([curses], [wgetch], [LIBCURSES="-lcurses"],
      [missing_ncurses=[true]])])
  AC_SUBST([LIBCURSES])
[if [ x"$missing_ncurses" = x ]; then ]
  [# Check for headers.]
  AC_CHECK_HEADERS([ncurses/curses.h], [],
    [AC_CHECK_HEADERS([ncurses.h], [],
      [AC_CHECK_HEADERS([curses.h], [],
	[missing_ncurses=[true]])])])
[fi]
if test x"$missing_ncurses" = xtrue ; then
  AC_MSG_ERROR([grub-emu can't be compiled without ncurses])
fi

if test x"$enable_grub_emu_usb" = xno ; then
  grub_emu_usb_excuse="explicitly disabled"
fi

if test x"$enable_grub_emu_pci" = xyes ; then
   grub_emu_usb_excuse="conflicts with PCI support"
fi

[if [ x"$grub_emu_usb_excuse" = x ]; then
    # Check for libusb libraries.]
AC_CHECK_LIB([usb], [usb_claim_interface], [LIBUSB="-lusb"],
    [grub_emu_usb_excuse=["need libusb library"]])
    AC_SUBST([LIBUSB])
[fi]
[if [ x"$grub_emu_usb_excuse" = x ]; then
    # Check for headers.]
    AC_CHECK_HEADERS([usb.h], [],
      [grub_emu_usb_excuse=["need libusb headers"]])
[fi]
if test x"$enable_grub_emu_usb" = xyes && test x"$grub_emu_usb_excuse" != x ; then
  AC_MSG_ERROR([USB support for grub-emu was explicitly requested but can't be compiled])
fi
if test x"$grub_emu_usb_excuse" = x ; then
enable_grub_emu_usb=yes
else
enable_grub_emu_usb=no
fi

if test x"$enable_grub_emu_sdl" = xno ; then
  grub_emu_sdl_excuse="explicitely disabled"
fi
[if [ x"$grub_emu_sdl_excuse" = x ]; then
    # Check for libSDL libraries.]
AC_CHECK_LIB([SDL], [SDL_Init], [LIBSDL="-lSDL"],
    [grub_emu_sdl_excuse=["libSDL libraries are required to build \`grub-emu' with SDL support"]])
    AC_SUBST([LIBSDL])
[fi]

[if [ x"$grub_emu_sdl_excuse" = x ]; then
    # Check for headers.]
    AC_CHECK_HEADERS([SDL/SDL.h], [],
      [grub_emu_sdl_excuse=["libSDL header file is required to build \`grub-emu' with SDL support"]])
[fi]

if test x"enable_grub_emu_sdl" = xyes && test x"$grub_emu_sdl_excuse" != x ; then
  AC_MSG_ERROR([SDL support for grub-emu was explicitely requested but can't be compiled])
fi
if test x"$grub_emu_sdl_excuse" = x ; then
enable_grub_emu_sdl=yes
else
enable_grub_emu_sdl=no
fi

if test x"$enable_grub_emu_pci" != xyes ; then
   grub_emu_pci_excuse="not enabled"
fi

if test x"$enable_grub_emu_usb" = xyes ; then
   grub_emu_pci_excuse="conflicts with USB support"
fi

[if [ x"$grub_emu_pci_excuse" = x ]; then
      # Check for libpci libraries.]
   AC_CHECK_LIB([pciaccess], [pci_system_init], [LIBPCIACCESS="-lpciaccess"],
      [grub_emu_pci_excuse=["need libpciaccess library"]])
    AC_SUBST([LIBPCIACCESS])
[fi]
[if [ x"$grub_emu_pci_excuse" = x ]; then
    # Check for headers.]
    AC_CHECK_HEADERS([pci/pci.h], [],
      [grub_emu_pci_excuse=["need libpciaccess headers"]])
[fi]

if test x"$grub_emu_pci_excuse" = x ; then
enable_grub_emu_pci=yes
else

enable_grub_emu_pci=no
fi

AC_SUBST([enable_grub_emu_sdl])
AC_SUBST([enable_grub_emu_usb])
AC_SUBST([enable_grub_emu_pci])
fi

AC_ARG_ENABLE([grub-fstest],
	      [AS_HELP_STRING([--enable-grub-fstest],
                             [build and install the `grub-fstest' debugging utility (default=guessed)])])
if test x"$enable_grub_fstest" = xno ; then
  grub_fstest_excuse="explicitly disabled"
fi
if test x"$grub_fstest_excuse" = x ; then
enable_grub_fstest=yes
else
enable_grub_fstest=no
fi
AC_SUBST([enable_grub_fstest])

AC_ARG_ENABLE([grub-mkfont],
	      [AS_HELP_STRING([--enable-grub-mkfont],
                             [build and install the `grub-mkfont' utility (default=guessed)])])
if test x"$enable_grub_mkfont" = xno ; then
  grub_mkfont_excuse="explicitly disabled"
fi

if test x"$grub_mkfont_excuse" = x ; then
  # Check for freetype libraries.
  AC_CHECK_PROGS([FREETYPE], [freetype-config])
  if test "x$FREETYPE" = x ; then
    grub_mkfont_excuse=["need freetype2 library"]
  fi
  freetype_cflags=`freetype-config --cflags`
  freetype_libs=`freetype-config --libs`
fi

if test x"$grub_mkfont_excuse" = x ; then
  # Check for freetype libraries.
  SAVED_CPPFLAGS="$CPPFLAGS"
  CPPFLAGS="$CPPFLAGS $freetype_cflags"
  AC_CHECK_HEADERS([ft2build.h], [],
  	[grub_mkfont_excuse=["need freetype2 headers"]])
  CPPFLAGS="$SAVED_CPPFLAGS"
fi

if test x"$enable_grub_mkfont" = xyes && test x"$grub_mkfont_excuse" != x ; then
  AC_MSG_ERROR([grub-mkfont was explicitly requested but can't be compiled])
fi
if test x"$grub_mkfont_excuse" = x ; then
enable_grub_mkfont=yes
else
enable_grub_mkfont=no
fi
AC_SUBST([enable_grub_mkfont])
AC_SUBST([freetype_cflags])
AC_SUBST([freetype_libs])

AC_SUBST([FONT_SOURCE])
AS_IF([test x$target_cpu = xi386 -a x$platform = xpc],
	    [AC_SUBST([GRUB_KERNEL_MACHINE_LINK_ADDR], 0x8200)])
AS_IF([test x$target_cpu = xi386 -a x$platform = xcoreboot],
	    [AC_SUBST([GRUB_KERNEL_MACHINE_LINK_ADDR], 0x8200)])
AS_IF([test x$target_cpu = xmips -a x$platform = xyeeloong],
	    [AC_SUBST([GRUB_KERNEL_MACHINE_LINK_ADDR], 0x80200000)])
AS_IF([test x$target_cpu = xpowerpc -a x$platform = xieee1275],
	    [AC_SUBST([GRUB_KERNEL_MACHINE_LINK_ADDR], 0x200000)])
AS_IF([test x$target_cpu = xi386 -a x$platform = xqemu],
	    [AC_SUBST([GRUB_BOOT_MACHINE_LINK_ADDR], 0xffe00)])
AS_IF([test x$target_cpu = xi386 -a x$platform = xieee1275],
	    [AC_SUBST([GRUB_KERNEL_MACHINE_LINK_ADDR], 0x10000)])
AS_IF([test x$TARGET_APPLE_CC = x1],
	    [AC_SUBST([USE_APPLE_CC_FIXES], yes)])

#
# Automake conditionals
#

AM_CONDITIONAL([COND_emu], [test x$platform = xemu])
AM_CONDITIONAL([COND_i386_pc], [test x$target_cpu = xi386 -a x$platform = xpc])
AM_CONDITIONAL([COND_i386_efi], [test x$target_cpu = xi386 -a x$platform = xefi])
AM_CONDITIONAL([COND_i386_coreboot], [test x$target_cpu = xi386 -a x$platform = xcoreboot])
AM_CONDITIONAL([COND_i386_ieee1275], [test x$target_cpu = xi386 -a x$platform = xieee1275])
AM_CONDITIONAL([COND_i386_qemu], [test x$target_cpu = xi386 -a x$platform = xqemu])
AM_CONDITIONAL([COND_x86_64_efi], [test x$target_cpu = xx86_64 -a x$platform = xefi])
AM_CONDITIONAL([COND_mips_yeeloong], [test x$target_cpu = xmips -a x$platform = xyeeloong])
AM_CONDITIONAL([COND_mips_qemu_mips], [test x$target_cpu = xmips -a x$platform = xqemu_mips])
AM_CONDITIONAL([COND_sparc64_ieee1275], [test x$target_cpu = xsparc64 -a x$platform = xieee1275])
AM_CONDITIONAL([COND_powerpc_ieee1275], [test x$target_cpu = xpowerpc -a x$platform = xieee1275])

AM_CONDITIONAL([COND_MAN_PAGES], [test x$cross_compiling = xno -a x$HELP2MAN != x])
AM_CONDITIONAL([COND_GRUB_EMU_USB], [test x$enable_grub_emu_usb = xyes])
AM_CONDITIONAL([COND_GRUB_EMU_SDL], [test x$enable_grub_emu_sdl = xyes])
AM_CONDITIONAL([COND_GRUB_EMU_PCI], [test x$enable_grub_emu_pci = xyes])
AM_CONDITIONAL([COND_GRUB_MKFONT], [test x$enable_grub_mkfont = xyes])
AM_CONDITIONAL([COND_HAVE_FONT_SOURCE], [test x$FONT_SOURCE != x])
AM_CONDITIONAL([COND_GRUB_FSTEST], [test x$enable_grub_fstest = xyes])
AM_CONDITIONAL([COND_ENABLE_EFIEMU], [test x$enable_efiemu = xyes])