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      1 dnl Configure script for GRUB.
      2 dnl Copyright 1999,2000,2001,2002,2003,2004,2005 Free Software Foundation, Inc.
      3 
      4 dnl Permission to use, copy, modify and distribute this software and its
      5 dnl documentation is hereby granted, provided that both the copyright
      6 dnl notice and this permission notice appear in all copies of the
      7 dnl software, derivative works or modified versions, and any portions
      8 dnl thereof, and that both notices appear in supporting documentation.
      9 dnl
     10 dnl THE FREE SOFTWARE FOUNDATION ALLOWS FREE USE OF THIS SOFTWARE IN ITS
     11 dnl "AS IS" CONDITION.  THE FREE SOFTWARE FOUNDATION DISCLAIMS ANY
     12 dnl LIABILITY OF ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE
     13 dnl USE OF THIS SOFTWARE.
     14 
     15 AC_PREREQ(2.57)
     16 AC_INIT([GRUB], [0.97], [bug-grub (a] gnu.org])
     17 AC_CONFIG_SRCDIR([stage2/stage2.c])
     18 AC_CONFIG_HEADER([config.h])
     19 AM_INIT_AUTOMAKE
     20 
     21 AC_CANONICAL_HOST
     22 
     23 case "$host_cpu" in
     24 i[[3456]]86) host_cpu=i386 ;;
     25 x86_64) host_cpu=x86_64 ;;
     26 *) AC_MSG_ERROR([unsupported CPU type]) ;;
     27 esac
     28 
     29 AC_SUBST(host_cpu)
     30 AC_SUBST(host_vendor)
     31 
     32 #
     33 # Options
     34 #
     35 
     36 AM_MAINTAINER_MODE
     37 if test "x$enable_maintainer_mode" = xyes; then
     38   AC_PATH_PROG(PERL,perl)
     39   if test -z "$PERL"; then
     40     AC_MSG_ERROR([perl not found])
     41   fi
     42 fi
     43 
     44 # This should be checked before AC_PROG_CC
     45 if test "x$CFLAGS" = x; then
     46   default_CFLAGS=yes
     47 fi
     48 
     49 if test "x$host_cpu" = xx86_64; then
     50   CFLAGS="-m32 $CFLAGS"
     51 fi
     52 
     53 #
     54 # Programs
     55 #
     56 
     57 AC_CHECK_TOOL(CC, gcc)
     58 AC_PROG_CC
     59 # We need this for older versions of Autoconf.
     60 _AM_DEPENDENCIES(CC)
     61 
     62 dnl Because recent automake complains about AS, set it here.
     63 CCAS="$CC"
     64 AC_SUBST(CCAS)
     65 
     66 AC_ARG_WITH(binutils,
     67   [  --with-binutils=DIR     search the directory DIR to find binutils])
     68 
     69 if test "x$with_binutils" != x; then
     70 dnl AC_PATH_TOOL is not seen in autoconf 2.13, so use AC_PATH_PROG
     71 dnl instead for now. It is preferable when you cross-compile GRUB.
     72 dnl  AC_PATH_TOOL(RANLIB, ranlib, :, "$with_binutils:$PATH")
     73   AC_PATH_PROG(RANLIB, ranlib, :, "$with_binutils:$PATH")
     74 else
     75   AC_PROG_RANLIB
     76 fi
     77 
     78 # optimization flags
     79 if test "x$ac_cv_prog_gcc" = xyes; then
     80   if test "x$default_CFLAGS" = xyes; then
     81     # Autoconf may set CFLAGS to -O2 and/or -g. So eliminate them.
     82     CFLAGS="`echo $CFLAGS | sed -e 's/-g//g' -e 's/-O[[0-9]]//g'` -g"
     83     # If the user specify the directory for binutils, add the option `-B'.
     84     if test "x$with_binutils" != x; then
     85       CFLAGS="-B$with_binutils/ $CFLAGS"
     86     fi
     87     STAGE1_CFLAGS="-O2"
     88     GRUB_CFLAGS="-O2"
     89     AC_CACHE_CHECK([whether optimization for size works], size_flag, [
     90       saved_CFLAGS=$CFLAGS
     91       CFLAGS="-Os -g"
     92       AC_TRY_COMPILE(, , size_flag=yes, size_flag=no)
     93       CFLAGS=$saved_CFLAGS
     94     ])
     95     if test "x$size_flag" = xyes; then
     96       STAGE2_CFLAGS="-Os"
     97     else
     98       STAGE2_CFLAGS="-O2 -fno-strength-reduce -fno-unroll-loops"
     99     fi
    100     # OpenBSD has a GCC extension for protecting applications from
    101     # stack smashing attacks, but GRUB doesn't want this feature.
    102     AC_CACHE_CHECK([whether gcc has -fno-stack-protector],
    103 		   no_stack_protector_flag, [
    104       saved_CFLAGS=$CFLAGS
    105       CFLAGS="-fno-stack-protector"
    106       AC_TRY_COMPILE(,
    107 		     ,
    108 		     no_stack_protector_flag=yes,
    109 		     no_stack_protector_flag=no)
    110       CFLAGS=$saved_CFLAGS
    111     ])
    112     if test "x$no_stack_protector_flag" = xyes; then
    113       STAGE2_CFLAGS="$STAGE2_CFLAGS -fno-stack-protector"
    114     fi
    115   fi
    116 fi
    117 
    118 AC_SUBST(STAGE1_CFLAGS)
    119 AC_SUBST(STAGE2_CFLAGS)
    120 AC_SUBST(GRUB_CFLAGS)
    121 
    122 # Enforce coding standards.
    123 CPPFLAGS="$CPPFLAGS -Wall -Wmissing-prototypes -Wunused -Wshadow"
    124 CPPFLAGS="$CPPFLAGS -Wpointer-arith"
    125 
    126 AC_CACHE_CHECK([whether -Wundef works], undef_flag, [
    127   saved_CPPFLAGS="$CPPFLAGS"
    128   CPPFLAGS="-Wundef"
    129   AC_TRY_COMPILE(, , undef_flag=yes, undef_flag=no)
    130   CPPFLAGS="$saved_CPPFLAGS"
    131 ])
    132 
    133 # The options `-falign-*' are supported by gcc 3.0 or later.
    134 # Probably it is sufficient to only check for -falign-loops.
    135 AC_CACHE_CHECK([whether -falign-loops works], [falign_loop_flag], [
    136   saved_CPPFLAGS="$CPPFLAGS"
    137   CPPFLAGS="-falign-loops=1"
    138   AC_TRY_COMPILE(, , [falign_loop_flag=yes], [falign_loop_flag=no])
    139   CPPFLAGS="$saved_CPPFLAGS"
    140 ])
    141 
    142 # Force no alignment to save space.
    143 if test "x$falign_loop_flag" = xyes; then
    144   CPPFLAGS="$CPPFLAGS -falign-jumps=1 -falign-loops=1 -falign-functions=1"
    145 else
    146   CPPFLAGS="$CPPFLAGS -malign-jumps=1 -malign-loops=1 -malign-functions=1"
    147 fi
    148 
    149 if test "x$undef_flag" = xyes; then
    150   CPPFLAGS="$CPPFLAGS -Wundef"
    151 fi
    152 
    153 if test "x$with_binutils" != x; then
    154 dnl  AC_PATH_TOOL(OBJCOPY, objcopy, , "$with_binutils:$PATH")
    155   AC_PATH_PROG(OBJCOPY, objcopy, , "$with_binutils:$PATH")
    156 else
    157   AC_CHECK_TOOL(OBJCOPY, objcopy)
    158 fi
    159 
    160 # Defined in acinclude.m4.
    161 grub_ASM_USCORE
    162 grub_PROG_OBJCOPY_ABSOLUTE
    163 if test "x$grub_cv_prog_objcopy_absolute" != xyes; then
    164   AC_MSG_ERROR([GRUB requires a working absolute objcopy; upgrade your binutils])
    165 fi
    166 
    167 grub_ASM_PREFIX_REQUIREMENT
    168 
    169 grub_ASM_ADDR32
    170 if test "x$grub_cv_asm_addr32" != xyes; then
    171   AC_MSG_ERROR([GRUB requires GAS .code16 addr32 support; upgrade your binutils])
    172 fi
    173 
    174 grub_ASM_ABSOLUTE_WITHOUT_ASTERISK
    175 
    176 grub_CHECK_START_SYMBOL
    177 grub_CHECK_USCORE_START_SYMBOL
    178 if test "x$grub_cv_check_start_symbol" != "xyes" \
    179 	-a "x$grub_cv_check_uscore_start_symbol" != "xyes"; then
    180   AC_MSG_ERROR([Neither start nor _start is defined])
    181 fi
    182 
    183 grub_CHECK_USCORE_USCORE_BSS_START_SYMBOL
    184 grub_CHECK_USCORE_EDATA_SYMBOL
    185 grub_CHECK_EDATA_SYMBOL
    186 if test "x$grub_cv_check_uscore_uscore_bss_start_symbol" != "xyes" \
    187 	-a "x$grub_cv_check_uscore_edata_symbol" != "xyes" \
    188 	-a "x$grub_cv_check_edata_symbol" != "xyes"; then
    189   AC_MSG_ERROR([None of __bss_start, _edata, edata defined])
    190 fi
    191 
    192 grub_CHECK_END_SYMBOL
    193 grub_CHECK_USCORE_END_SYMBOL
    194 if test "x$grub_cv_check_end_symbol" != "xyes" \
    195 	-a "x$grub_cv_check_uscore_end_symbol" != "xyes"; then
    196   AC_MSG_ERROR([Neither end nor _end is defined])
    197 fi
    198 
    199 # Check for curses libraries.
    200 AC_ARG_WITH(curses,
    201   [  --without-curses        do not use curses])
    202 
    203 # Get the filename or the whole disk and open it.
    204 # Known to work on NetBSD.
    205 AC_CHECK_LIB(util, opendisk, [GRUB_LIBS="$GRUB_LIBS -lutil"
    206   AC_DEFINE(HAVE_OPENDISK, 1, [Define if opendisk() in -lutil can be used])])
    207 
    208 # Unless the user specify --without-curses, check for curses.
    209 if test "x$with_curses" != "xno"; then
    210   AC_CHECK_LIB(ncurses, wgetch, [GRUB_LIBS="$GRUB_LIBS -lncurses"
    211   AC_DEFINE(HAVE_LIBCURSES, 1, [Define if you have a curses library])],
    212     [AC_CHECK_LIB(curses, wgetch, [GRUB_LIBS="$GRUB_LIBS -lcurses"
    213        AC_DEFINE(HAVE_LIBCURSES, 1, [Define if you have a curses library])])])
    214 fi
    215 
    216 AC_SUBST(GRUB_LIBS)
    217 
    218 # Check for headers.
    219 AC_CHECK_HEADERS(string.h strings.h ncurses/curses.h ncurses.h curses.h)
    220 
    221 # Check for user options.
    222 
    223 # filesystems support.
    224 AC_ARG_ENABLE(ext2fs,
    225   [  --disable-ext2fs        disable ext2fs support in Stage 2])
    226 
    227 if test x"$enable_ext2fs" != xno; then
    228   FSYS_CFLAGS="$FSYS_CFLAGS -DFSYS_EXT2FS=1"
    229 fi
    230 
    231 AC_ARG_ENABLE(fat,
    232   [  --disable-fat           disable FAT support in Stage 2])
    233 
    234 if test x"$enable_fat" != xno; then
    235   FSYS_CFLAGS="$FSYS_CFLAGS -DFSYS_FAT=1"
    236 fi
    237 
    238 AC_ARG_ENABLE(ffs,
    239   [  --disable-ffs           disable FFS support in Stage 2])
    240 
    241 if test x"$enable_ffs" != xno; then
    242   FSYS_CFLAGS="$FSYS_CFLAGS -DFSYS_FFS=1"
    243 fi
    244 
    245 AC_ARG_ENABLE(ufs2,
    246   [  --disable-ufs2          disable UFS2 support in Stage 2])
    247 
    248 if test x"$enable_ufs2" != xno; then
    249   FSYS_CFLAGS="$FSYS_CFLAGS -DFSYS_UFS2=1"
    250 fi
    251 
    252 AC_ARG_ENABLE(minix,
    253   [  --disable-minix         disable Minix fs support in Stage 2])
    254 
    255 if test x"$enable_minix" != xno; then
    256   FSYS_CFLAGS="$FSYS_CFLAGS -DFSYS_MINIX=1"
    257 fi
    258 
    259 AC_ARG_ENABLE(reiserfs,
    260   [  --disable-reiserfs      disable ReiserFS support in Stage 2])
    261 
    262 if test x"$enable_reiserfs" != xno; then
    263   FSYS_CFLAGS="$FSYS_CFLAGS -DFSYS_REISERFS=1"
    264 fi
    265 
    266 AC_ARG_ENABLE(vstafs,
    267   [  --disable-vstafs        disable VSTa FS support in Stage 2])
    268 
    269 if test x"$enable_vstafs" != xno; then
    270   FSYS_CFLAGS="$FSYS_CFLAGS -DFSYS_VSTAFS=1"
    271 fi
    272 
    273 AC_ARG_ENABLE(jfs,
    274   [  --disable-jfs           disable IBM JFS support in Stage 2])
    275 
    276 if test x"$enable_jfs" != xno; then
    277   FSYS_CFLAGS="$FSYS_CFLAGS -DFSYS_JFS=1"
    278 fi
    279 
    280 AC_ARG_ENABLE(xfs,
    281   [  --disable-xfs           disable SGI XFS support in Stage 2])
    282 
    283 if test x"$enable_xfs" != xno; then
    284   FSYS_CFLAGS="$FSYS_CFLAGS -DFSYS_XFS=1"
    285 fi
    286 
    287 AC_ARG_ENABLE(iso9660,
    288   [  --disable-iso9660       disable ISO9660 support in Stage 2])
    289 
    290 if test x"$enable_iso9660" != xno; then
    291   FSYS_CFLAGS="$FSYS_CFLAGS -DFSYS_ISO9660=1"
    292 fi
    293 
    294 dnl AC_ARG_ENABLE(tftp,
    295 dnl [  --enable-tftp           enable TFTP support in Stage 2])
    296 dnl 
    297 dnl #if test x"$enable_tftp" = xyes; then
    298 dnl FSYS_CFLAGS="$FSYS_CFLAGS -DFSYS_TFTP=1"
    299 dnl fi
    300 
    301 AC_ARG_ENABLE(gunzip,
    302   [  --disable-gunzip        disable decompression in Stage 2])
    303 
    304 if test x"$enable_gunzip" = xno; then
    305   FSYS_CFLAGS="$FSYS_CFLAGS -DNO_DECOMPRESSION=1"
    306 fi
    307 
    308 AC_ARG_ENABLE(md5-password,
    309   [  --disable-md5-password  disable MD5 password support in Stage 2])
    310 if test "x$enable_md5_password" != xno; then
    311   FSYS_CFLAGS="$FSYS_CFLAGS -DUSE_MD5_PASSWORDS=1"
    312 fi
    313 
    314 dnl The netboot support.
    315 dnl General options.
    316 AC_ARG_ENABLE(packet-retransmission,
    317   [  --disable-packet-retransmission
    318                           turn off packet retransmission])
    319 if test "x$enable_packet_retransmission" != xno; then
    320   NET_EXTRAFLAGS="$NET_EXTRAFLAGS -DCONGESTED=1"
    321 fi
    322 
    323 AC_ARG_ENABLE(pci-direct,
    324   [  --enable-pci-direct     access PCI directly instead of using BIOS])
    325 if test "x$enable_pci_direct" = xyes; then
    326   NET_EXTRAFLAGS="$NET_EXTRAFLAGS -DCONFIG_PCI_DIRECT=1"
    327 fi
    328 
    329 dnl Device drivers.
    330 AC_ARG_ENABLE(3c509,
    331   [  --enable-3c509          enable 3Com509 driver])
    332 if test "x$enable_3c509" = xyes; then
    333   NET_CFLAGS="$NET_CFLAGS -DINCLUDE_3C509"
    334   NETBOOT_DRIVERS="$NETBOOT_DRIVERS 3c509.o"
    335 fi
    336 
    337 AC_ARG_ENABLE(3c529,
    338   [  --enable-3c529          enable 3Com529 driver])
    339 if test "x$enable_3c529" = xyes; then
    340   NET_CFLAGS="$NET_CFLAGS -DINCLUDE_3C529=1"
    341   NETBOOT_DRIVERS="$NETBOOT_DRIVERS 3c529.o"
    342 fi
    343 
    344 AC_ARG_ENABLE(3c595,
    345   [  --enable-3c595          enable 3Com595 driver])
    346 if test "x$enable_3c595" = xyes; then
    347   NET_CFLAGS="$NET_CFLAGS -DINCLUDE_3C595=1"
    348   NETBOOT_DRIVERS="$NETBOOT_DRIVERS 3c595.o"
    349 fi
    350 
    351 AC_ARG_ENABLE(3c90x,
    352   [  --enable-3c90x          enable 3Com90x driver])
    353 if test "x$enable_3c90x" = xyes; then
    354   NET_CFLAGS="$NET_CFLAGS -DINCLUDE_3C90X=1"
    355   NETBOOT_DRIVERS="$NETBOOT_DRIVERS 3c90x.o"
    356 fi
    357 
    358 AC_ARG_ENABLE(cs89x0,
    359   [  --enable-cs89x0         enable CS89x0 driver])
    360 if test "x$enable_cs89x0" = xyes; then
    361   NET_CFLAGS="$NET_CFLAGS -DINCLUDE_CS89X0=1"
    362   NETBOOT_DRIVERS="$NETBOOT_DRIVERS cs89x0.o"
    363 fi
    364 
    365 AC_ARG_ENABLE(davicom,
    366   [  --enable-davicom        enable Davicom driver])
    367 if test "x$enable_davicom" = xyes; then
    368   NET_CFLAGS="$NET_CFLAGS -DINCLUDE_DAVICOM=1"
    369   NETBOOT_DRIVERS="$NETBOOT_DRIVERS davicom.o"
    370 fi
    371 
    372 AC_ARG_ENABLE(depca,
    373   [  --enable-depca          enable DEPCA and EtherWORKS driver])
    374 if test "x$enable_depca" = xyes; then
    375   NET_CFLAGS="$NET_CFLAGS -DINCLUDE_DEPCA=1"
    376   NETBOOT_DRIVERS="$NETBOOT_DRIVERS depca.o"
    377 fi
    378 
    379 AC_ARG_ENABLE(eepro,
    380   [  --enable-eepro          enable Etherexpress Pro/10 driver])
    381 if test "x$enable_eepro" = xyes; then
    382   NET_CFLAGS="$NET_CFLAGS -DINCLUDE_EEPRO=1"
    383   NETBOOT_DRIVERS="$NETBOOT_DRIVERS eepro.o"
    384 fi
    385 
    386 AC_ARG_ENABLE(eepro100,
    387   [  --enable-eepro100       enable Etherexpress Pro/100 driver])
    388 if test "x$enable_eepro100" = xyes; then
    389   NET_CFLAGS="$NET_CFLAGS -DINCLUDE_EEPRO100=1"
    390   NETBOOT_DRIVERS="$NETBOOT_DRIVERS eepro100.o"
    391 fi
    392 
    393 AC_ARG_ENABLE(epic100,
    394   [  --enable-epic100        enable SMC 83c170 EPIC/100 driver])
    395 if test "x$enable_epic100" = xyes; then
    396   NET_CFLAGS="$NET_CFLAGS -DINCLUDE_EPIC100=1"
    397   NETBOOT_DRIVERS="$NETBOOT_DRIVERS epic100.o"
    398 fi
    399 
    400 AC_ARG_ENABLE(3c507,
    401   [  --enable-3c507          enable 3Com507 driver])
    402 if test "x$enable_3c507" = xyes; then
    403   NET_CFLAGS="$NET_CFLAGS -DINCLUDE_3C507=1"
    404   NETBOOT_DRIVERS="$NETBOOT_DRIVERS 3c507.o"
    405 fi
    406 
    407 AC_ARG_ENABLE(exos205,
    408   [  --enable-exos205        enable EXOS205 driver])
    409 if test "x$enable_exos205" = xyes; then
    410   NET_CFLAGS="$NET_CFLAGS -DINCLUDE_EXOS205=1"
    411   NETBOOT_DRIVERS="$NETBOOT_DRIVERS exos205.o"
    412 fi
    413 
    414 AC_ARG_ENABLE(ni5210,
    415   [  --enable-ni5210         enable Racal-Interlan NI5210 driver])
    416 if test "x$enable_ni5210" = xyes; then
    417   NET_CFLAGS="$NET_CFLAGS -DINCLUDE_NI5210=1"
    418   NETBOOT_DRIVERS="$NETBOOT_DRIVERS ni5210.o"
    419 fi
    420 
    421 AC_ARG_ENABLE(lance,
    422   [  --enable-lance          enable Lance PCI PCNet/32 driver])
    423 if test "x$enable_lance" = xyes; then
    424   NET_CFLAGS="$NET_CFLAGS -DINCLUDE_LANCE=1"
    425   NETBOOT_DRIVERS="$NETBOOT_DRIVERS lance.o"
    426 fi
    427 
    428 AC_ARG_ENABLE(ne2100,
    429   [  --enable-ne2100         enable Novell NE2100 driver])
    430 if test "x$enable_ne2100" = xyes; then
    431   NET_CFLAGS="$NET_CFLAGS -DINCLUDE_NE2100=1"
    432   NETBOOT_DRIVERS="$NETBOOT_DRIVERS ne2100.o"
    433 fi
    434 
    435 AC_ARG_ENABLE(ni6510,
    436   [  --enable-ni6510         enable Racal-Interlan NI6510 driver])
    437 if test "x$enable_ni6510" = xyes; then
    438   NET_CFLAGS="$NET_CFLAGS -DINCLUDE_NI6510=1"
    439   NETBOOT_DRIVERS="$NETBOOT_DRIVERS ni6510.o"
    440 fi
    441 
    442 AC_ARG_ENABLE(natsemi,
    443   [  --enable-natsemi        enable NatSemi DP8381x driver])
    444 if test "x$enable_natsemi" = xyes; then
    445   NET_CFLAGS="$NET_CFLAGS -DINCLUDE_NATSEMI=1"
    446   NETBOOT_DRIVERS="$NETBOOT_DRIVERS natsemi.o"
    447 fi
    448 
    449 AC_ARG_ENABLE(ni5010,
    450   [  --enable-ni5010         enable Racal-Interlan NI5010 driver])
    451 if test "x$enable_ni5010" = xyes; then
    452   NET_CFLAGS="$NET_CFLAGS -DINCLUDE_NI5010=1"
    453   NETBOOT_DRIVERS="$NETBOOT_DRIVERS ni5010.o"
    454 fi
    455 
    456 AC_ARG_ENABLE(3c503,
    457   [  --enable-3c503          enable 3Com503 driver])
    458 if test "x$enable_3c503" = xyes; then
    459   NET_CFLAGS="$NET_CFLAGS -DINCLUDE_3C503=1"
    460   NETBOOT_DRIVERS="$NETBOOT_DRIVERS 3c503.o"
    461 fi
    462 
    463 AC_ARG_ENABLE(ne,
    464   [  --enable-ne             enable NE1000/2000 ISA driver])
    465 if test "x$enable_ne" = xyes; then
    466   NET_CFLAGS="$NET_CFLAGS -DINCLUDE_NE=1"
    467   NETBOOT_DRIVERS="$NETBOOT_DRIVERS ne.o"
    468 fi
    469 
    470 AC_ARG_ENABLE(ns8390,
    471   [  --enable-ns8390         enable NE2000 PCI driver])
    472 if test "x$enable_ns8390" = xyes; then
    473   NET_CFLAGS="$NET_CFLAGS -DINCLUDE_NS8390=1"
    474   NETBOOT_DRIVERS="$NETBOOT_DRIVERS ns8390.o"
    475 fi
    476 
    477 AC_ARG_ENABLE(wd,
    478   [  --enable-wd             enable WD8003/8013, SMC8216/8416 driver])
    479 if test "x$enable_wd" = xyes; then
    480   NET_CFLAGS="$NET_CFLAGS -DINCLUDE_WD=1"
    481   NETBOOT_DRIVERS="$NETBOOT_DRIVERS wd.o"
    482 fi
    483 
    484 AC_ARG_ENABLE(otulip,
    485   [  --enable-otulip         enable old Tulip driver])
    486 if test "x$enable_otulip" = xyes; then
    487   NET_CFLAGS="$NET_CFLAGS -DINCLUDE_OTULIP=1"
    488   NETBOOT_DRIVERS="$NETBOOT_DRIVERS otulip.o"
    489 fi
    490 
    491 AC_ARG_ENABLE(rtl8139,
    492   [  --enable-rtl8139        enable Realtek 8139 driver])
    493 if test "x$enable_rtl8139" = xyes; then
    494   NET_CFLAGS="$NET_CFLAGS -DINCLUDE_RTL8139=1"
    495   NETBOOT_DRIVERS="$NETBOOT_DRIVERS rtl8139.o"
    496 fi
    497 
    498 AC_ARG_ENABLE(sis900,
    499   [  --enable-sis900         enable SIS 900 and SIS 7016 driver])
    500 if test "x$enable_sis900" = xyes; then
    501   NET_CFLAGS="$NET_CFLAGS -DINCLUDE_SIS900=1"
    502   NETBOOT_DRIVERS="$NETBOOT_DRIVERS sis900.o"
    503 fi
    504 
    505 AC_ARG_ENABLE(sk-g16,
    506   [  --enable-sk-g16         enable Schneider and Koch G16 driver])
    507 if test "x$enable_sk_g16" = xyes; then
    508   NET_CFLAGS="$NET_CFLAGS -DINCLUDE_SK_G16=1"
    509   NETBOOT_DRIVERS="$NETBOOT_DRIVERS sk_g16.o"
    510 fi
    511 
    512 AC_ARG_ENABLE(smc9000,
    513   [  --enable-smc9000        enable SMC9000 driver])
    514 if test "x$enable_smc9000" = xyes; then
    515   NET_CFLAGS="$NET_CFLAGS -DINCLUDE_SMC9000=1"
    516   NETBOOT_DRIVERS="$NETBOOT_DRIVERS smc9000.o"
    517 fi
    518 
    519 AC_ARG_ENABLE(tiara,
    520   [  --enable-tiara          enable Tiara driver])
    521 if test "x$enable_tiara" = xyes; then
    522   NET_CFLAGS="$NET_CFLAGS -DINCLUDE_TIARA=1"
    523   NETBOOT_DRIVERS="$NETBOOT_DRIVERS tiara.o"
    524 fi
    525 
    526 AC_ARG_ENABLE(tulip,
    527   [  --enable-tulip          enable Tulip driver])
    528 if test "x$enable_tulip" = xyes; then
    529   NET_CFLAGS="$NET_CFLAGS -DINCLUDE_TULIP=1"
    530   NETBOOT_DRIVERS="$NETBOOT_DRIVERS tulip.o"
    531 fi
    532 
    533 AC_ARG_ENABLE(via-rhine,
    534   [  --enable-via-rhine      enable Rhine-I/II driver])
    535 if test "x$enable_via_rhine" = xyes; then
    536   NET_CFLAGS="$NET_CFLAGS -DINCLUDE_VIA_RHINE=1"
    537   NETBOOT_DRIVERS="$NETBOOT_DRIVERS via_rhine.o"
    538 fi
    539 
    540 AC_ARG_ENABLE(w89c840,
    541   [  --enable-w89c840        enable Winbond W89c840, Compex RL100-ATX driver])
    542 if test "x$enable_w89c840" = xyes; then
    543   NET_CFLAGS="$NET_CFLAGS -DINCLUDE_W89C840=1"
    544   NETBOOT_DRIVERS="$NETBOOT_DRIVERS w89c840.o"
    545 fi
    546 
    547 dnl Check if the netboot support is turned on.
    548 AM_CONDITIONAL(NETBOOT_SUPPORT, test "x$NET_CFLAGS" != x)
    549 if test "x$NET_CFLAGS" != x; then
    550   FSYS_CFLAGS="$FSYS_CFLAGS -DFSYS_TFTP=1"
    551 fi
    552 
    553 dnl Extra options.
    554 AC_ARG_ENABLE(3c503-shmem,
    555   [  --enable-3c503-shmem    use 3c503 shared memory mode])
    556 if test "x$enable_3c503_shmem" = xyes; then
    557   NET_EXTRAFLAGS="$NET_EXTRAFLAGS -DT503_SHMEM=1"
    558 fi
    559 
    560 AC_ARG_ENABLE(3c503-aui,
    561   [  --enable-3c503-aui      use AUI by default on 3c503 cards])
    562 if test "x$enable_3c503_aui" = xyes; then
    563   NET_EXTRAFLAGS="$NET_EXTRAFLAGS -DT503_AUI=1"
    564 fi
    565 
    566 AC_ARG_ENABLE(compex-rl2000-fix,
    567   [  --enable-compex-rl2000-fix
    568                           specify this if you have a Compex RL2000 PCI])
    569 if test "x$enable_compex_rl2000_fix" = xyes; then
    570   NET_EXTRAFLAGS="$NET_EXTRAFLAGS -DCOMPEX_RL2000_FIX=1"
    571 fi
    572 
    573 AC_ARG_ENABLE(smc9000-scan,
    574   [  --enable-smc9000-scan=LIST
    575                           probe for SMC9000 I/O addresses using LIST],
    576   [NET_EXTRAFLAGS="$NET_EXTRAFLAGS -DSMC9000_SCAN=$enable_smc9000_scan"])
    577 
    578 AC_ARG_ENABLE(ne-scan,
    579   [  --enable-ne-scan=LIST   probe for NE base address using LIST],
    580   [NET_EXTRAFLAGS="$NET_EXTRAFLAGS -DNE_SCAN=$enable_ne_scan"],
    581   [NET_EXTRAFLAGS="$NET_EXTRAFLAGS -DNE_SCAN=0x280,0x300,0x320,0x340"])
    582 
    583 AC_ARG_ENABLE(wd-default-mem,
    584   [  --enable-wd-default-mem=MEM
    585                           set the default memory location for WD/SMC],
    586   [NET_EXTRAFLAGS="$NET_EXTRAFLAGS -DWD_DEFAULT_MEM=$enable_wd_default_mem"],
    587   [NET_EXTRAFLAGS="$NET_EXTRAFLAGS -DWD_DEFAULT_MEM=0xCC000"])
    588 
    589 AC_ARG_ENABLE(cs-scan,
    590   [  --enable-cs-scan=LIST   probe for CS89x0 base address using LIST],
    591   [NET_EXTRAFLAGS="$NET_EXTRAFLAGS -DCS_SCAN=$enable_cs_scan"])
    592 
    593 dnl Diskless
    594 AC_ARG_ENABLE(diskless,
    595   [  --enable-diskless       enable diskless support])
    596 AM_CONDITIONAL(DISKLESS_SUPPORT, test "x$enable_diskless" = xyes)
    597 
    598 dnl Hercules terminal
    599 AC_ARG_ENABLE(hercules,
    600   [  --disable-hercules      disable hercules terminal support])
    601 AM_CONDITIONAL(HERCULES_SUPPORT, test "x$enable_hercules" != xno)
    602 
    603 dnl Serial terminal
    604 AC_ARG_ENABLE(serial,
    605   [  --disable-serial        disable serial terminal support])
    606 AM_CONDITIONAL(SERIAL_SUPPORT, test "x$enable_serial" != xno)
    607 
    608 dnl Simulation of the slowness of a serial device.
    609 AC_ARG_ENABLE(serial-speed-simulation,
    610   [  --enable-serial-speed-simulation
    611                           simulate the slowness of a serial device])
    612 AM_CONDITIONAL(SERIAL_SPEED_SIMULATION,
    613   test "x$enable_serial_speed_simulation" = xyes)
    614 
    615 # Sanity check.
    616 if test "x$enable_diskless" = xyes; then
    617   if test "x$NET_CFLAGS" = x; then
    618     AC_MSG_ERROR([You must enable at least one network driver])
    619   fi
    620 fi
    621 
    622 dnl Embed a menu string in GRUB itself.
    623 AC_ARG_ENABLE(preset-menu,
    624   [  --enable-preset-menu=FILE
    625                           preset a menu file FILE in Stage 2])
    626 if test "x$enable_preset_menu" = x; then
    627   :
    628 else
    629   if test -r $enable_preset_menu; then
    630     grub_DEFINE_FILE(PRESET_MENU_STRING, [$enable_preset_menu],
    631     		     [Define if there is user specified preset menu string])
    632   else
    633     AC_MSG_ERROR([Cannot read the preset menu file $enable_preset_menu])
    634   fi
    635 fi
    636 
    637 dnl Build the example Multiboot kernel.
    638 AC_ARG_ENABLE(example-kernel,
    639   [  --enable-example-kernel
    640                           build the example Multiboot kernel])
    641 AM_CONDITIONAL(BUILD_EXAMPLE_KERNEL, test "x$enable_example_kernel" = xyes)
    642 
    643 dnl Automatic Linux mem= option.
    644 AC_ARG_ENABLE(auto-linux-mem-opt,
    645   [  --disable-auto-linux-mem-opt
    646                           don't pass Linux mem= option automatically])
    647 if test "x$enable_auto_linux_mem_opt" = xno; then
    648   :
    649 else
    650   AC_DEFINE(AUTO_LINUX_MEM_OPT, 1, [Define if you don't want to pass the mem= option to Linux])
    651 fi
    652 
    653 dnl Now substitute the variables.
    654 AC_SUBST(FSYS_CFLAGS)
    655 AC_SUBST(NET_CFLAGS)
    656 AC_SUBST(NET_EXTRAFLAGS)
    657 AC_SUBST(NETBOOT_DRIVERS)
    658 
    659 dnl Because recent automake complains about CCASFLAGS, set it here.
    660 CCASFLAGS='$(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(CPPFLAGS) $(CFLAGS)'
    661 AC_SUBST(CCASFLAGS)
    662 
    663 
    664 dnl Output.
    665 AC_CONFIG_FILES([Makefile stage1/Makefile stage2/Makefile \
    666 		 docs/Makefile lib/Makefile util/Makefile \
    667 		 grub/Makefile netboot/Makefile util/grub-image \
    668 		 util/grub-install util/grub-md5-crypt \
    669 		 util/grub-terminfo util/grub-set-default])
    670 AC_OUTPUT
    671