dnl Configure script for GRUB.dnl Copyright 1999,2000,2001,2002 Free Software Foundation, Inc.dnl Permission to use, copy, modify and distribute this software and itsdnl documentation is hereby granted, provided that both the copyrightdnl notice and this permission notice appear in all copies of thednl software, derivative works or modified versions, and any portionsdnl thereof, and that both notices appear in supporting documentation.dnldnl THE FREE SOFTWARE FOUNDATION ALLOWS FREE USE OF THIS SOFTWARE IN ITSdnl "AS IS" CONDITION.  THE FREE SOFTWARE FOUNDATION DISCLAIMS ANYdnl LIABILITY OF ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THEdnl USE OF THIS SOFTWARE.AC_INIT(stage2/stage2.c)AM_INIT_AUTOMAKE(grub, 0.93)AM_CONFIG_HEADER(config.h)AC_PREREQ(2.13)AC_CANONICAL_HOSTcase "$host_cpu" ini[[3456]]86) host_cpu=i386 ;;*) AC_MSG_ERROR([unsupported CPU type]) ;;esacAC_SUBST(host_cpu)AC_SUBST(host_vendor)## Options#AM_MAINTAINER_MODEif test "x$enable_maintainer_mode" = xyes; then  AC_PATH_PROG(PERL,perl)  if test -z "$PERL"; then    AC_MSG_ERROR([perl not found])  fifi# This should be checked before AC_PROG_CCif test "x$CFLAGS" = x; then  default_CFLAGS=yesfi## 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.AS="$CC"AC_SUBST(AS)AC_ARG_WITH(binutils,  [  --with-binutils=DIR     search the directory DIR to find binutils])if test "x$with_binutils" != x; thendnl AC_PATH_TOOL is not seen in autoconf 2.13, so use AC_PATH_PROGdnl 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_RANLIBfi# optimization flagsif 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  fifiAC_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="$CPPFLAGS -malign-jumps=1 -malign-loops=1 -malign-functions=1"fiif test "x$undef_flag" = xyes; then  CPPFLAGS="$CPPFLAGS -Wundef"fiif test "x$with_binutils" != x; thendnl  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_USCOREgrub_PROG_OBJCOPY_ABSOLUTEif test "x$grub_cv_prog_objcopy_absolute" != xyes; then  AC_MSG_ERROR([GRUB requires a working absolute objcopy; upgrade your binutils])figrub_ASM_PREFIX_REQUIREMENTgrub_ASM_ADDR32if test "x$grub_cv_asm_addr32" != xyes; then  AC_MSG_ERROR([GRUB requires GAS .code16 addr32 support; upgrade your binutils])figrub_ASM_ABSOLUTE_WITHOUT_ASTERISKgrub_CHECK_START_SYMBOLgrub_CHECK_USCORE_START_SYMBOLif 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])figrub_CHECK_USCORE_USCORE_BSS_START_SYMBOLgrub_CHECK_USCORE_EDATA_SYMBOLgrub_CHECK_EDATA_SYMBOLif test "x$grub_cv_check_uscore_uscore_bss_start_symbol" != "xyes" \	-a "x$grub_cv_check_uscore_edata_symbol" != "xyes" \	-a "x$grub_cv_check_edata_symbol" != "xyes"; then  AC_MSG_ERROR([None of __bss_start, _edata, edata defined])figrub_CHECK_END_SYMBOLgrub_CHECK_USCORE_END_SYMBOLif test "x$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="$GRUB_LIBS -lcurses"       AC_DEFINE(HAVE_LIBCURSES)])])fiAC_SUBST(GRUB_LIBS)# Check for headers.AC_CHECK_HEADERS(string.h strings.h ncurses/curses.h ncurses.h curses.h)# Check for user options.# filesystems support.AC_ARG_ENABLE(ext2fs,  [  --disable-ext2fs        disable ext2fs support in Stage 2])if test x"$enable_ext2fs" != xno; then  FSYS_CFLAGS="$FSYS_CFLAGS -DFSYS_EXT2FS=1"fiAC_ARG_ENABLE(fat,  [  --disable-fat           disable FAT support in Stage 2])if test x"$enable_fat" != xno; then  FSYS_CFLAGS="$FSYS_CFLAGS -DFSYS_FAT=1"fiAC_ARG_ENABLE(ffs,  [  --disable-ffs           disable FFS support in Stage 2])if test x"$enable_ffs" != xno; then  FSYS_CFLAGS="$FSYS_CFLAGS -DFSYS_FFS=1"fiAC_ARG_ENABLE(minix,  [  --disable-minix         disable Minix fs support in Stage 2])if test x"$enable_minix" != xno; then  FSYS_CFLAGS="$FSYS_CFLAGS -DFSYS_MINIX=1"fiAC_ARG_ENABLE(reiserfs,  [  --disable-reiserfs      disable ReiserFS support in Stage 2])if test x"$enable_reiserfs" != xno; then  FSYS_CFLAGS="$FSYS_CFLAGS -DFSYS_REISERFS=1"fiAC_ARG_ENABLE(vstafs,  [  --disable-vstafs        disable VSTa FS support in Stage 2])if test x"$enable_vstafs" != xno; then  FSYS_CFLAGS="$FSYS_CFLAGS -DFSYS_VSTAFS=1"fiAC_ARG_ENABLE(jfs,  [  --disable-jfs           disable IBM JFS support in Stage 2])if test x"$enable_jfs" != xno; then  FSYS_CFLAGS="$FSYS_CFLAGS -DFSYS_JFS=1"fiAC_ARG_ENABLE(xfs,  [  --disable-xfs           disable SGI XFS support in Stage 2])if test x"$enable_xfs" != xno; then  FSYS_CFLAGS="$FSYS_CFLAGS -DFSYS_XFS=1"fidnl AC_ARG_ENABLE(tftp,dnl [  --enable-tftp           enable TFTP support in Stage 2])dnl dnl #if test x"$enable_tftp" = xyes; thendnl FSYS_CFLAGS="$FSYS_CFLAGS -DFSYS_TFTP=1"dnl fiAC_ARG_ENABLE(gunzip,  [  --disable-gunzip        disable decompression in Stage 2])if test x"$enable_gunzip" = xno; then  FSYS_CFLAGS="$FSYS_CFLAGS -DNO_DECOMPRESSION=1"fiAC_ARG_ENABLE(md5-password,  [  --disable-md5-password  disable MD5 password support in Stage 2])if test "x$enable_md5_password" != xno; then  FSYS_CFLAGS="$FSYS_CFLAGS -DUSE_MD5_PASSWORDS=1"fidnl The netboot support.dnl General options.AC_ARG_ENABLE(packet-retransmission,  [  --disable-packet-retransmission                          turn off packet retransmission])if test "x$enable_packet_retransmission" != xno; then  NET_EXTRAFLAGS="$NET_EXTRAFLAGS -DCONGESTED=1"fiAC_ARG_ENABLE(pci-direct,  [  --enable-pci-direct     access PCI directly instead of using BIOS])if test "x$enable_pci_direct" = xyes; then  NET_EXTRAFLAGS="$NET_EXTRAFLAGS -DCONFIG_PCI_DIRECT=1"fidnl Device drivers.AC_ARG_ENABLE(3c509,  [  --enable-3c509          enable 3Com509 driver])if test "x$enable_3c509" = xyes; then  NET_CFLAGS="$NET_CFLAGS -DINCLUDE_3C509"  NETBOOT_DRIVERS="$NETBOOT_DRIVERS 3c509.o"fiAC_ARG_ENABLE(3c529,  [  --enable-3c529          enable 3Com529 driver])if test "x$enable_3c529" = xyes; then  NET_CFLAGS="$NET_CFLAGS -DINCLUDE_3C529=1"  NETBOOT_DRIVERS="$NETBOOT_DRIVERS 3c529.o"fiAC_ARG_ENABLE(3c595,  [  --enable-3c595          enable 3Com595 driver])if test "x$enable_3c595" = xyes; then  NET_CFLAGS="$NET_CFLAGS -DINCLUDE_3C595=1"  NETBOOT_DRIVERS="$NETBOOT_DRIVERS 3c595.o"fiAC_ARG_ENABLE(3c90x,  [  --enable-3c90x          enable 3Com90x driver])