Code drop from //branches/cupcake/...@124589

1 files changed, 670 insertions, 0 deletions

diff --git a/configure.ac b/configure.ac
new file mode 100644
index 0000000..bb9e1d9
--- /dev/null
+++ b/configure.ac
@@ -0,0 +1,670 @@
+dnl Configure script for GRUB.
+dnl Copyright 1999,2000,2001,2002,2003,2004,2005 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_PREREQ(2.57)
+AC_INIT([GRUB], [0.97], [bug-grub@gnu.org])
+AC_CONFIG_SRCDIR([stage2/stage2.c])
+AC_CONFIG_HEADER([config.h])
+AM_INIT_AUTOMAKE
+
+AC_CANONICAL_HOST
+
+case "$host_cpu" in
+i[[3456]]86) host_cpu=i386 ;;
+x86_64) host_cpu=x86_64 ;;
+*) AC_MSG_ERROR([unsupported CPU type]) ;;
+esac
+
+AC_SUBST(host_cpu)
+AC_SUBST(host_vendor)
+
+#
+# Options
+#
+
+AM_MAINTAINER_MODE
+if test "x$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
+
+if test "x$host_cpu" = xx86_64; then
+  CFLAGS="-m32 $CFLAGS"
+fi
+
+#
+# Programs
+#
+
+AC_CHECK_TOOL(CC, gcc)
+AC_PROG_CC
+# We need this for older versions of Autoconf.
+_AM_DEPENDENCIES(CC)
+
+dnl Because recent automake complains about AS, set it here.
+CCAS="$CC"
+AC_SUBST(CCAS)
+
+AC_ARG_WITH(binutils,
+  [  --with-binutils=DIR     search the directory DIR to find binutils])
+
+if test "x$with_binutils" != x; then
+dnl AC_PATH_TOOL is not seen in autoconf 2.13, so use AC_PATH_PROG
+dnl instead for now. It is preferable when you cross-compile GRUB.
+dnl  AC_PATH_TOOL(RANLIB, ranlib, :, "$with_binutils:$PATH")
+  AC_PATH_PROG(RANLIB, ranlib, :, "$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
+    # Autoconf may set CFLAGS to -O2 and/or -g. So eliminate them.
+    CFLAGS="`echo $CFLAGS | sed -e 's/-g//g' -e 's/-O[[0-9]]//g'` -g"
+    # If the user specify the directory for binutils, add the option `-B'.
+    if test "x$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
+    # OpenBSD has a GCC extension for protecting applications from
+    # stack smashing attacks, but GRUB doesn't want this feature.
+    AC_CACHE_CHECK([whether gcc has -fno-stack-protector],
+		   no_stack_protector_flag, [
+      saved_CFLAGS=$CFLAGS
+      CFLAGS="-fno-stack-protector"
+      AC_TRY_COMPILE(,
+		     ,
+		     no_stack_protector_flag=yes,
+		     no_stack_protector_flag=no)
+      CFLAGS=$saved_CFLAGS
+    ])
+    if test "x$no_stack_protector_flag" = xyes; then
+      STAGE2_CFLAGS="$STAGE2_CFLAGS -fno-stack-protector"
+    fi
+  fi
+fi
+
+AC_SUBST(STAGE1_CFLAGS)
+AC_SUBST(STAGE2_CFLAGS)
+AC_SUBST(GRUB_CFLAGS)
+
+# Enforce coding standards.
+CPPFLAGS="$CPPFLAGS -Wall -Wmissing-prototypes -Wunused -Wshadow"
+CPPFLAGS="$CPPFLAGS -Wpointer-arith"
+
+AC_CACHE_CHECK([whether -Wundef works], undef_flag, [
+  saved_CPPFLAGS="$CPPFLAGS"
+  CPPFLAGS="-Wundef"
+  AC_TRY_COMPILE(, , undef_flag=yes, undef_flag=no)
+  CPPFLAGS="$saved_CPPFLAGS"
+])
+
+# The options `-falign-*' are supported by gcc 3.0 or later.
+# Probably it is sufficient to only check for -falign-loops.
+AC_CACHE_CHECK([whether -falign-loops works], [falign_loop_flag], [
+  saved_CPPFLAGS="$CPPFLAGS"
+  CPPFLAGS="-falign-loops=1"
+  AC_TRY_COMPILE(, , [falign_loop_flag=yes], [falign_loop_flag=no])
+  CPPFLAGS="$saved_CPPFLAGS"
+])
+
+# Force no alignment to save space.
+if test "x$falign_loop_flag" = xyes; then
+  CPPFLAGS="$CPPFLAGS -falign-jumps=1 -falign-loops=1 -falign-functions=1"
+else
+  CPPFLAGS="$CPPFLAGS -malign-jumps=1 -malign-loops=1 -malign-functions=1"
+fi
+
+if test "x$undef_flag" = xyes; then
+  CPPFLAGS="$CPPFLAGS -Wundef"
+fi
+
+if test "x$with_binutils" != x; then
+dnl  AC_PATH_TOOL(OBJCOPY, objcopy, , "$with_binutils:$PATH")
+  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_ASM_ABSOLUTE_WITHOUT_ASTERISK
+
+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, 1, [Define if you have a curses library])],
+    [AC_CHECK_LIB(curses, wgetch, [GRUB_LIBS="$GRUB_LIBS -lcurses"
+       AC_DEFINE(HAVE_LIBCURSES, 1, [Define if you have a curses library])])])
+fi
+
+AC_SUBST(GRUB_LIBS)
+
+# Check for headers.
+AC_CHECK_HEADERS(string.h strings.h ncurses/curses.h ncurses.h curses.h)
+
+# Check for user options.
+
+# filesystems support.
+AC_ARG_ENABLE(ext2fs,
+  [  --disable-ext2fs        disable ext2fs support in Stage 2])
+
+if test x"$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="$FSYS_CFLAGS -DFSYS_FFS=1"
+fi
+
+AC_ARG_ENABLE(ufs2,
+  [  --disable-ufs2          disable UFS2 support in Stage 2])
+
+if test x"$enable_ufs2" != xno; then
+  FSYS_CFLAGS="$FSYS_CFLAGS -DFSYS_UFS2=1"
+fi
+
+AC_ARG_ENABLE(minix,
+  [  --disable-minix         disable Minix fs support in Stage 2])
+
+if test x"$enable_minix" != xno; then
+  FSYS_CFLAGS="$FSYS_CFLAGS -DFSYS_MINIX=1"
+fi
+
+AC_ARG_ENABLE(reiserfs,
+  [  --disable-reiserfs      disable ReiserFS support in Stage 2])
+
+if test x"$enable_reiserfs" != xno; then
+  FSYS_CFLAGS="$FSYS_CFLAGS -DFSYS_REISERFS=1"
+fi
+
+AC_ARG_ENABLE(vstafs,
+  [  --disable-vstafs        disable VSTa FS support in Stage 2])
+
+if test x"$enable_vstafs" != xno; then
+  FSYS_CFLAGS="$FSYS_CFLAGS -DFSYS_VSTAFS=1"
+fi
+
+AC_ARG_ENABLE(jfs,
+  [  --disable-jfs           disable IBM JFS support in Stage 2])
+
+if test x"$enable_jfs" != xno; then
+  FSYS_CFLAGS="$FSYS_CFLAGS -DFSYS_JFS=1"
+fi
+
+AC_ARG_ENABLE(xfs,
+  [  --disable-xfs           disable SGI XFS support in Stage 2])
+
+if test x"$enable_xfs" != xno; then
+  FSYS_CFLAGS="$FSYS_CFLAGS -DFSYS_XFS=1"
+fi
+
+AC_ARG_ENABLE(iso9660,
+  [  --disable-iso9660       disable ISO9660 support in Stage 2])
+
+if test x"$enable_iso9660" != xno; then
+  FSYS_CFLAGS="$FSYS_CFLAGS -DFSYS_ISO9660=1"
+fi
+
+dnl AC_ARG_ENABLE(tftp,
+dnl [  --enable-tftp           enable TFTP support in Stage 2])
+dnl 
+dnl #if test x"$enable_tftp" = xyes; then
+dnl FSYS_CFLAGS="$FSYS_CFLAGS -DFSYS_TFTP=1"
+dnl fi
+
+AC_ARG_ENABLE(gunzip,
+  [  --disable-gunzip        disable decompression in Stage 2])
+
+if test x"$enable_gunzip" = xno; then
+  FSYS_CFLAGS="$FSYS_CFLAGS -DNO_DECOMPRESSION=1"
+fi
+
+AC_ARG_ENABLE(md5-password,
+  [  --disable-md5-password  disable MD5 password support in Stage 2])
+if test "x$enable_md5_password" != xno; then
+  FSYS_CFLAGS="$FSYS_CFLAGS -DUSE_MD5_PASSWORDS=1"
+fi
+
+dnl The netboot support.
+dnl General options.
+AC_ARG_ENABLE(packet-retransmission,
+  [  --disable-packet-retransmission
+                          turn off packet retransmission])
+if test "x$enable_packet_retransmission" != xno; then
+  NET_EXTRAFLAGS="$NET_EXTRAFLAGS -DCONGESTED=1"
+fi
+
+AC_ARG_ENABLE(pci-direct,
+  [  --enable-pci-direct     access PCI directly instead of using BIOS])
+if test "x$enable_pci_direct" = xyes; then
+  NET_EXTRAFLAGS="$NET_EXTRAFLAGS -DCONFIG_PCI_DIRECT=1"
+fi
+
+dnl Device drivers.
+AC_ARG_ENABLE(3c509,
+  [  --enable-3c509          enable 3Com509 driver])
+if test "x$enable_3c509" = xyes; then
+  NET_CFLAGS="$NET_CFLAGS -DINCLUDE_3C509"
+  NETBOOT_DRIVERS="$NETBOOT_DRIVERS 3c509.o"
+fi
+
+AC_ARG_ENABLE(3c529,
+  [  --enable-3c529          enable 3Com529 driver])
+if test "x$enable_3c529" = xyes; then
+  NET_CFLAGS="$NET_CFLAGS -DINCLUDE_3C529=1"
+  NETBOOT_DRIVERS="$NETBOOT_DRIVERS 3c529.o"
+fi
+
+AC_ARG_ENABLE(3c595,
+  [  --enable-3c595          enable 3Com595 driver])
+if test "x$enable_3c595" = xyes; then
+  NET_CFLAGS="$NET_CFLAGS -DINCLUDE_3C595=1"
+  NETBOOT_DRIVERS="$NETBOOT_DRIVERS 3c595.o"
+fi
+
+AC_ARG_ENABLE(3c90x,
+  [  --enable-3c90x          enable 3Com90x driver])
+if test "x$enable_3c90x" = xyes; then
+  NET_CFLAGS="$NET_CFLAGS -DINCLUDE_3C90X=1"
+  NETBOOT_DRIVERS="$NETBOOT_DRIVERS 3c90x.o"
+fi
+
+AC_ARG_ENABLE(cs89x0,
+  [  --enable-cs89x0         enable CS89x0 driver])
+if test "x$enable_cs89x0" = xyes; then
+  NET_CFLAGS="$NET_CFLAGS -DINCLUDE_CS89X0=1"
+  NETBOOT_DRIVERS="$NETBOOT_DRIVERS cs89x0.o"
+fi
+
+AC_ARG_ENABLE(davicom,
+  [  --enable-davicom        enable Davicom driver])
+if test "x$enable_davicom" = xyes; then
+  NET_CFLAGS="$NET_CFLAGS -DINCLUDE_DAVICOM=1"
+  NETBOOT_DRIVERS="$NETBOOT_DRIVERS davicom.o"
+fi
+
+AC_ARG_ENABLE(depca,
+  [  --enable-depca          enable DEPCA and EtherWORKS driver])
+if test "x$enable_depca" = xyes; then
+  NET_CFLAGS="$NET_CFLAGS -DINCLUDE_DEPCA=1"
+  NETBOOT_DRIVERS="$NETBOOT_DRIVERS depca.o"
+fi
+
+AC_ARG_ENABLE(eepro,
+  [  --enable-eepro          enable Etherexpress Pro/10 driver])
+if test "x$enable_eepro" = xyes; then
+  NET_CFLAGS="$NET_CFLAGS -DINCLUDE_EEPRO=1"
+  NETBOOT_DRIVERS="$NETBOOT_DRIVERS eepro.o"
+fi
+
+AC_ARG_ENABLE(eepro100,
+  [  --enable-eepro100       enable Etherexpress Pro/100 driver])
+if test "x$enable_eepro100" = xyes; then
+  NET_CFLAGS="$NET_CFLAGS -DINCLUDE_EEPRO100=1"
+  NETBOOT_DRIVERS="$NETBOOT_DRIVERS eepro100.o"
+fi
+
+AC_ARG_ENABLE(epic100,
+  [  --enable-epic100        enable SMC 83c170 EPIC/100 driver])
+if test "x$enable_epic100" = xyes; then
+  NET_CFLAGS="$NET_CFLAGS -DINCLUDE_EPIC100=1"
+  NETBOOT_DRIVERS="$NETBOOT_DRIVERS epic100.o"
+fi
+
+AC_ARG_ENABLE(3c507,
+  [  --enable-3c507          enable 3Com507 driver])
+if test "x$enable_3c507" = xyes; then
+  NET_CFLAGS="$NET_CFLAGS -DINCLUDE_3C507=1"
+  NETBOOT_DRIVERS="$NETBOOT_DRIVERS 3c507.o"
+fi
+
+AC_ARG_ENABLE(exos205,
+  [  --enable-exos205        enable EXOS205 driver])
+if test "x$enable_exos205" = xyes; then
+  NET_CFLAGS="$NET_CFLAGS -DINCLUDE_EXOS205=1"
+  NETBOOT_DRIVERS="$NETBOOT_DRIVERS exos205.o"
+fi
+
+AC_ARG_ENABLE(ni5210,
+  [  --enable-ni5210         enable Racal-Interlan NI5210 driver])
+if test "x$enable_ni5210" = xyes; then
+  NET_CFLAGS="$NET_CFLAGS -DINCLUDE_NI5210=1"
+  NETBOOT_DRIVERS="$NETBOOT_DRIVERS ni5210.o"
+fi
+
+AC_ARG_ENABLE(lance,
+  [  --enable-lance          enable Lance PCI PCNet/32 driver])
+if test "x$enable_lance" = xyes; then
+  NET_CFLAGS="$NET_CFLAGS -DINCLUDE_LANCE=1"
+  NETBOOT_DRIVERS="$NETBOOT_DRIVERS lance.o"
+fi
+
+AC_ARG_ENABLE(ne2100,
+  [  --enable-ne2100         enable Novell NE2100 driver])
+if test "x$enable_ne2100" = xyes; then
+  NET_CFLAGS="$NET_CFLAGS -DINCLUDE_NE2100=1"
+  NETBOOT_DRIVERS="$NETBOOT_DRIVERS ne2100.o"
+fi
+
+AC_ARG_ENABLE(ni6510,
+  [  --enable-ni6510         enable Racal-Interlan NI6510 driver])
+if test "x$enable_ni6510" = xyes; then
+  NET_CFLAGS="$NET_CFLAGS -DINCLUDE_NI6510=1"
+  NETBOOT_DRIVERS="$NETBOOT_DRIVERS ni6510.o"
+fi
+
+AC_ARG_ENABLE(natsemi,
+  [  --enable-natsemi        enable NatSemi DP8381x driver])
+if test "x$enable_natsemi" = xyes; then
+  NET_CFLAGS="$NET_CFLAGS -DINCLUDE_NATSEMI=1"
+  NETBOOT_DRIVERS="$NETBOOT_DRIVERS natsemi.o"
+fi
+
+AC_ARG_ENABLE(ni5010,
+  [  --enable-ni5010         enable Racal-Interlan NI5010 driver])
+if test "x$enable_ni5010" = xyes; then
+  NET_CFLAGS="$NET_CFLAGS -DINCLUDE_NI5010=1"
+  NETBOOT_DRIVERS="$NETBOOT_DRIVERS ni5010.o"
+fi
+
+AC_ARG_ENABLE(3c503,
+  [  --enable-3c503          enable 3Com503 driver])
+if test "x$enable_3c503" = xyes; then
+  NET_CFLAGS="$NET_CFLAGS -DINCLUDE_3C503=1"
+  NETBOOT_DRIVERS="$NETBOOT_DRIVERS 3c503.o"
+fi
+
+AC_ARG_ENABLE(ne,
+  [  --enable-ne             enable NE1000/2000 ISA driver])
+if test "x$enable_ne" = xyes; then
+  NET_CFLAGS="$NET_CFLAGS -DINCLUDE_NE=1"
+  NETBOOT_DRIVERS="$NETBOOT_DRIVERS ne.o"
+fi
+
+AC_ARG_ENABLE(ns8390,
+  [  --enable-ns8390         enable NE2000 PCI driver])
+if test "x$enable_ns8390" = xyes; then
+  NET_CFLAGS="$NET_CFLAGS -DINCLUDE_NS8390=1"
+  NETBOOT_DRIVERS="$NETBOOT_DRIVERS ns8390.o"
+fi
+
+AC_ARG_ENABLE(wd,
+  [  --enable-wd             enable WD8003/8013, SMC8216/8416 driver])
+if test "x$enable_wd" = xyes; then
+  NET_CFLAGS="$NET_CFLAGS -DINCLUDE_WD=1"
+  NETBOOT_DRIVERS="$NETBOOT_DRIVERS wd.o"
+fi
+
+AC_ARG_ENABLE(otulip,
+  [  --enable-otulip         enable old Tulip driver])
+if test "x$enable_otulip" = xyes; then
+  NET_CFLAGS="$NET_CFLAGS -DINCLUDE_OTULIP=1"
+  NETBOOT_DRIVERS="$NETBOOT_DRIVERS otulip.o"
+fi
+
+AC_ARG_ENABLE(rtl8139,
+  [  --enable-rtl8139        enable Realtek 8139 driver])
+if test "x$enable_rtl8139" = xyes; then
+  NET_CFLAGS="$NET_CFLAGS -DINCLUDE_RTL8139=1"
+  NETBOOT_DRIVERS="$NETBOOT_DRIVERS rtl8139.o"
+fi
+
+AC_ARG_ENABLE(sis900,
+  [  --enable-sis900         enable SIS 900 and SIS 7016 driver])
+if test "x$enable_sis900" = xyes; then
+  NET_CFLAGS="$NET_CFLAGS -DINCLUDE_SIS900=1"
+  NETBOOT_DRIVERS="$NETBOOT_DRIVERS sis900.o"
+fi
+
+AC_ARG_ENABLE(sk-g16,
+  [  --enable-sk-g16         enable Schneider and Koch G16 driver])
+if test "x$enable_sk_g16" = xyes; then
+  NET_CFLAGS="$NET_CFLAGS -DINCLUDE_SK_G16=1"
+  NETBOOT_DRIVERS="$NETBOOT_DRIVERS sk_g16.o"
+fi
+
+AC_ARG_ENABLE(smc9000,
+  [  --enable-smc9000        enable SMC9000 driver])
+if test "x$enable_smc9000" = xyes; then
+  NET_CFLAGS="$NET_CFLAGS -DINCLUDE_SMC9000=1"
+  NETBOOT_DRIVERS="$NETBOOT_DRIVERS smc9000.o"
+fi
+
+AC_ARG_ENABLE(tiara,
+  [  --enable-tiara          enable Tiara driver])
+if test "x$enable_tiara" = xyes; then
+  NET_CFLAGS="$NET_CFLAGS -DINCLUDE_TIARA=1"
+  NETBOOT_DRIVERS="$NETBOOT_DRIVERS tiara.o"
+fi
+
+AC_ARG_ENABLE(tulip,
+  [  --enable-tulip          enable Tulip driver])
+if test "x$enable_tulip" = xyes; then
+  NET_CFLAGS="$NET_CFLAGS -DINCLUDE_TULIP=1"
+  NETBOOT_DRIVERS="$NETBOOT_DRIVERS tulip.o"
+fi
+
+AC_ARG_ENABLE(via-rhine,
+  [  --enable-via-rhine      enable Rhine-I/II driver])
+if test "x$enable_via_rhine" = xyes; then
+  NET_CFLAGS="$NET_CFLAGS -DINCLUDE_VIA_RHINE=1"
+  NETBOOT_DRIVERS="$NETBOOT_DRIVERS via_rhine.o"
+fi
+
+AC_ARG_ENABLE(w89c840,
+  [  --enable-w89c840        enable Winbond W89c840, Compex RL100-ATX driver])
+if test "x$enable_w89c840" = xyes; then
+  NET_CFLAGS="$NET_CFLAGS -DINCLUDE_W89C840=1"
+  NETBOOT_DRIVERS="$NETBOOT_DRIVERS w89c840.o"
+fi
+
+dnl Check if the netboot support is turned on.
+AM_CONDITIONAL(NETBOOT_SUPPORT, test "x$NET_CFLAGS" != x)
+if test "x$NET_CFLAGS" != x; then
+  FSYS_CFLAGS="$FSYS_CFLAGS -DFSYS_TFTP=1"
+fi
+
+dnl Extra options.
+AC_ARG_ENABLE(3c503-shmem,
+  [  --enable-3c503-shmem    use 3c503 shared memory mode])
+if test "x$enable_3c503_shmem" = xyes; then
+  NET_EXTRAFLAGS="$NET_EXTRAFLAGS -DT503_SHMEM=1"
+fi
+
+AC_ARG_ENABLE(3c503-aui,
+  [  --enable-3c503-aui      use AUI by default on 3c503 cards])
+if test "x$enable_3c503_aui" = xyes; then
+  NET_EXTRAFLAGS="$NET_EXTRAFLAGS -DT503_AUI=1"
+fi
+
+AC_ARG_ENABLE(compex-rl2000-fix,
+  [  --enable-compex-rl2000-fix
+                          specify this if you have a Compex RL2000 PCI])
+if test "x$enable_compex_rl2000_fix" = xyes; then
+  NET_EXTRAFLAGS="$NET_EXTRAFLAGS -DCOMPEX_RL2000_FIX=1"
+fi
+
+AC_ARG_ENABLE(smc9000-scan,
+  [  --enable-smc9000-scan=LIST
+                          probe for SMC9000 I/O addresses using LIST],
+  [NET_EXTRAFLAGS="$NET_EXTRAFLAGS -DSMC9000_SCAN=$enable_smc9000_scan"])
+
+AC_ARG_ENABLE(ne-scan,
+  [  --enable-ne-scan=LIST   probe for NE base address using LIST],
+  [NET_EXTRAFLAGS="$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=MEM
+                          set the default memory location for WD/SMC],
+  [NET_EXTRAFLAGS="$NET_EXTRAFLAGS -DWD_DEFAULT_MEM=$enable_wd_default_mem"],
+  [NET_EXTRAFLAGS="$NET_EXTRAFLAGS -DWD_DEFAULT_MEM=0xCC000"])
+
+AC_ARG_ENABLE(cs-scan,
+  [  --enable-cs-scan=LIST   probe for CS89x0 base address using LIST],
+  [NET_EXTRAFLAGS="$NET_EXTRAFLAGS -DCS_SCAN=$enable_cs_scan"])
+
+dnl Diskless
+AC_ARG_ENABLE(diskless,
+  [  --enable-diskless       enable diskless support])
+AM_CONDITIONAL(DISKLESS_SUPPORT, test "x$enable_diskless" = xyes)
+
+dnl Hercules terminal
+AC_ARG_ENABLE(hercules,
+  [  --disable-hercules      disable hercules terminal support])
+AM_CONDITIONAL(HERCULES_SUPPORT, test "x$enable_hercules" != xno)
+
+dnl Serial terminal
+AC_ARG_ENABLE(serial,
+  [  --disable-serial        disable serial terminal support])
+AM_CONDITIONAL(SERIAL_SUPPORT, test "x$enable_serial" != xno)
+
+dnl Simulation of the slowness of a serial device.
+AC_ARG_ENABLE(serial-speed-simulation,
+  [  --enable-serial-speed-simulation
+                          simulate the slowness of a serial device])
+AM_CONDITIONAL(SERIAL_SPEED_SIMULATION,
+  test "x$enable_serial_speed_simulation" = xyes)
+
+# Sanity check.
+if test "x$enable_diskless" = xyes; then
+  if test "x$NET_CFLAGS" = x; then
+    AC_MSG_ERROR([You must enable at least one network driver])
+  fi
+fi
+
+dnl Embed a menu string in GRUB itself.
+AC_ARG_ENABLE(preset-menu,
+  [  --enable-preset-menu=FILE
+                          preset a menu file FILE in Stage 2])
+if test "x$enable_preset_menu" = x; then
+  :
+else
+  if test -r $enable_preset_menu; then
+    grub_DEFINE_FILE(PRESET_MENU_STRING, [$enable_preset_menu],
+    		     [Define if there is user specified preset menu string])
+  else
+    AC_MSG_ERROR([Cannot read the preset menu file $enable_preset_menu])
+  fi
+fi
+
+dnl Build the example Multiboot kernel.
+AC_ARG_ENABLE(example-kernel,
+  [  --enable-example-kernel
+                          build the example Multiboot kernel])
+AM_CONDITIONAL(BUILD_EXAMPLE_KERNEL, test "x$enable_example_kernel" = xyes)
+
+dnl Automatic Linux mem= option.
+AC_ARG_ENABLE(auto-linux-mem-opt,
+  [  --disable-auto-linux-mem-opt
+                          don't pass Linux mem= option automatically])
+if test "x$enable_auto_linux_mem_opt" = xno; then
+  :
+else
+  AC_DEFINE(AUTO_LINUX_MEM_OPT, 1, [Define if you don't want to pass the mem= option to Linux])
+fi
+
+dnl Now substitute the variables.
+AC_SUBST(FSYS_CFLAGS)
+AC_SUBST(NET_CFLAGS)
+AC_SUBST(NET_EXTRAFLAGS)
+AC_SUBST(NETBOOT_DRIVERS)
+
+dnl Because recent automake complains about CCASFLAGS, set it here.
+CCASFLAGS='$(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(CPPFLAGS) $(CFLAGS)'
+AC_SUBST(CCASFLAGS)
+
+
+dnl Output.
+AC_CONFIG_FILES([Makefile stage1/Makefile stage2/Makefile \
+		 docs/Makefile lib/Makefile util/Makefile \
+		 grub/Makefile netboot/Makefile util/grub-image \
+		 util/grub-install util/grub-md5-crypt \
+		 util/grub-terminfo util/grub-set-default])
+AC_OUTPUT