grub/configure.ac

415 lines
12 KiB
Text

# Process this file with autoconf to produce a configure script.
# Copyright (C) 2002,2003,2004,2005,2006,2007,2008 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.
dnl This configure script is complicated, because GRUB needs to deal
dnl with three potentially different types:
dnl
dnl build -- the environment for building GRUB
dnl host -- the environment for running utilities
dnl target -- the environment for running GRUB
dnl
dnl In addition, GRUB needs to deal with a platform specification
dnl which specifies the system running GRUB, such as firmware.
dnl This is necessary because the target type in autoconf does not
dnl describe such a system very well.
dnl
dnl The current strategy is to use variables with no prefix (such as
dnl CC, CFLAGS, etc.) for the host type as well as the build type,
dnl because GRUB does not need to use those variables for the build
dnl type, so there is no conflict. Variables with the prefix "TARGET_"
dnl (such as TARGET_CC, TARGET_CFLAGS, etc.) are used for the target
dnl type.
AC_INIT([GRUB],[1.96],[bug-grub@gnu.org])
AC_PREREQ(2.59)
AC_CONFIG_SRCDIR([include/grub/dl.h])
AC_CONFIG_HEADER([config.h])
# Checks for host and target systems.
AC_CANONICAL_HOST
AC_CANONICAL_TARGET
# Program name transformations
AC_ARG_PROGRAM
case "$host_cpu" in
powerpc64) host_m32=1 ;;
esac
case "$target_cpu" in
i[[3456]]86) target_cpu=i386 ;;
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"-"$target_vendor" in
i386-apple) platform=efi ;;
i386-*) platform=pc ;;
x86_64-apple) platform=efi ;;
x86_64-*) platform=pc ;;
powerpc-*) platform=ieee1275 ;;
powerpc64-*) platform=ieee1275 ;;
sparc64-*) platform=ieee1275 ;;
*) AC_MSG_ERROR([unsupported CPU: "$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-*) 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-coreboot) ;;
i386-linuxbios) platform=coreboot ;;
i386-ieee1275) ;;
powerpc-ieee1275) ;;
sparc64-ieee1275) ;;
*) 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
case "$target_os" in
mingw32) target_os=cygwin ;;
esac
AC_SUBST(target_cpu)
AC_SUBST(target_os)
AC_SUBST(platform)
#
# Checks for build programs.
#
# Although cmp is listed in the GNU Coding Standards as a command which
# can used directly, OpenBSD lacks cmp in the default installation.
AC_CHECK_PROGS([CMP], [cmp])
if test "x$CMP" = x; then
AC_MSG_ERROR([cmp is not found])
fi
AC_CHECK_PROGS([YACC], [bison])
if test "x$YACC" = x; then
AC_MSG_ERROR([bison is not found])
fi
for file in /usr/share/unifont/unifont.hex ; do
if test -e $file ; then
AC_SUBST([UNIFONT_HEX], [$file])
break
fi
done
AC_PROG_INSTALL
AC_PROG_AWK
AC_PROG_MAKE_SET
# These are not a "must".
AC_PATH_PROG(RUBY, ruby)
AC_PATH_PROG(HELP2MAN, help2man)
#
# Checks for host programs.
#
AC_PROG_CC
# Must be GCC.
test "x$GCC" = xyes || AC_MSG_ERROR([GCC is required])
AC_GNU_SOURCE
AC_SYS_LARGEFILE
# Identify characteristics of the host architecture.
AC_C_BIGENDIAN
AC_CHECK_SIZEOF(void *)
AC_CHECK_SIZEOF(long)
if test "x$host_m32" = x1; then
# Force 32-bit mode.
CFLAGS="$CFLAGS -m32"
LDFLAGS="$LDFLAGS -m32"
fi
# Check LZO when compiling for the i386-pc.
if test "$target_cpu"-"$platform" = i386-pc; then
AC_ARG_ENABLE([lzo],
[AS_HELP_STRING([--enable-lzo],
[use lzo to compress kernel (default is lzma)])])
[if [ x"$enable_lzo" = xyes ]; then
# There are three possibilities. LZO version 2 installed with the name
# liblzo2, with the name liblzo, and LZO version 1.]
AC_DEFINE([ENABLE_LZO], [1], [Use lzo compression])
AC_CHECK_LIB([lzo2], [__lzo_init_v2], [LIBLZO="-llzo2"],
[AC_CHECK_LIB([lzo], [__lzo_init_v2], [LIBLZO="-llzo"],
[AC_CHECK_LIB([lzo], [__lzo_init2], [LIBLZO="-llzo"],
[AC_MSG_ERROR([LZO library version 1.02 or later is required])])])])
AC_SUBST([LIBLZO])
[LIBS="$LIBS $LIBLZO"]
AC_CHECK_FUNC([lzo1x_999_compress], ,
[AC_MSG_ERROR([LZO1X-999 must be enabled])])
[# LZO version 2 uses lzo/lzo1x.h, while LZO version 1 uses lzo1x.h.]
AC_CHECK_HEADERS([lzo/lzo1x.h lzo1x.h])
[else]
AC_DEFINE([ENABLE_LZMA], [1], [Use lzma compression])
[fi]
AC_SUBST([enable_lzo])
fi
# Check for functions.
AC_CHECK_FUNCS(posix_memalign memalign asprintf)
#
# Check for target programs.
#
# Use linker script if present, otherwise use builtin -N script.
AC_MSG_CHECKING([for option to link raw image])
if test -f "${srcdir}/conf/${target_cpu}-${platform}-${target_os}-img-ld.sc"; then
TARGET_IMG_LDSCRIPT='$(top_srcdir)'"/conf/${target_cpu}-${platform}-${target_os}-img-ld.sc"
TARGET_IMG_LDFLAGS="-Wl,-T${TARGET_IMG_LDSCRIPT}"
TARGET_IMG_LDFLAGS_AC="-Wl,-T${srcdir}/conf/${target_cpu}-${platform}-${target_os}-img-ld.sc"
else
TARGET_IMG_LDSCRIPT=
TARGET_IMG_LDFLAGS='-Wl,-N'
TARGET_IMG_LDFLAGS_AC='-Wl,-N'
fi
AC_SUBST(TARGET_IMG_LDSCRIPT)
AC_SUBST(TARGET_IMG_LDFLAGS)
AC_MSG_RESULT([$TARGET_IMG_LDFLAGS_AC])
# For platforms where ELF is not the default link format.
AC_MSG_CHECKING([for command to convert module to ELF format])
case "${host_os}:${target_os}" in
cygwin:cygwin) TARGET_OBJ2ELF='grub-pe2elf' ;;
*) ;;
esac
AC_SUBST(TARGET_OBJ2ELF)
AC_MSG_RESULT([$TARGET_OBJ2ELF])
# For cross-compiling.
if test "x$target" != "x$host"; then
# XXX this depends on the implementation of autoconf!
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=$CC
fi
AC_CHECK_TOOL(OBJCOPY, objcopy)
AC_CHECK_TOOL(STRIP, strip)
AC_CHECK_TOOL(NM, nm)
fi
AC_SUBST(TARGET_CC)
# Test the C compiler for the target environment.
tmp_CC="$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=""
if test "x$TARGET_CFLAGS" = x; then
# debug flags.
TARGET_CFLAGS="-Wall -W -Wshadow -Wpointer-arith -Wmissing-prototypes \
-Wundef -Wstrict-prototypes -g"
# optimization flags.
AC_CACHE_CHECK([whether optimization for size works], grub_cv_cc_Os, [
CFLAGS=-Os
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
[grub_cv_cc_Os=yes],
[grub_cv_cc_Os=no])
])
if test "x$grub_cv_cc_Os" = xyes; then
TARGET_CFLAGS="$TARGET_CFLAGS -Os"
else
TARGET_CFLAGS="$TARGET_CFLAGS -O2 -fno-strength-reduce -fno-unroll-loops"
fi
# Force no alignment to save space on i386.
if test "x$target_cpu" = xi386; then
AC_CACHE_CHECK([whether -falign-loops works], [grub_cv_cc_falign_loop], [
CFLAGS="-falign-loops=1"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
[grub_cv_cc_falign_loop=yes],
[grub_cv_cc_falign_loop=no])
])
if test "x$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
fi
fi
if test "x$target_m32" = x1; then
# Force 32-bit mode.
TARGET_CFLAGS="$TARGET_CFLAGS -m32"
TARGET_LDFLAGS="$TARGET_LDFLAGS -m32"
fi
if test "x$target_m64" = x1; then
# Force 64-bit mode.
TARGET_CFLAGS="$TARGET_CFLAGS -m64"
TARGET_LDFLAGS="$TARGET_LDFLAGS -m64"
fi
#
# Compiler features.
#
# Need __enable_execute_stack() for nested function trampolines?
grub_CHECK_ENABLE_EXECUTE_STACK
# 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_SUBST(TARGET_CFLAGS)
AC_SUBST(TARGET_CPPFLAGS)
AC_SUBST(TARGET_LDFLAGS)
AC_SUBST(MODULE_LDFLAGS)
# Set them to their new values for the tests below.
CC="$TARGET_CC"
CFLAGS="$TARGET_CFLAGS"
CPPFLAGS="$TARGET_CPPFLAGS"
LDFLAGS="$TARGET_LDFLAGS"
# Defined in aclocal.m4.
grub_PROG_TARGET_CC
grub_PROG_OBJCOPY_ABSOLUTE
grub_PROG_LD_BUILD_ID_NONE
grub_ASM_USCORE
if test "x$target_cpu" = xi386; then
if test ! -z "$TARGET_IMG_LDSCRIPT"; then
# Check symbols provided by linker script.
CFLAGS="$TARGET_CFLAGS -nostdlib $TARGET_IMG_LDFLAGS_AC -Wl,-Ttext,8000,--defsym,___main=0x8100"
fi
if test "x$platform" = xpc; then
grub_CHECK_START_SYMBOL
grub_CHECK_BSS_START_SYMBOL
grub_CHECK_END_SYMBOL
fi
CFLAGS="$TARGET_CFLAGS"
grub_I386_ASM_PREFIX_REQUIREMENT
grub_I386_ASM_ADDR32
grub_I386_ASM_ABSOLUTE_WITHOUT_ASTERISK
grub_I386_CHECK_REGPARM_BUG
else
AC_DEFINE([NESTED_FUNC_ATTR], [], [Catch gcc bug])
fi
# Restore the flags.
CC="$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],
[AS_HELP_STRING([--enable-grub-emu],
[build and install the `grub-emu' debugging utility])])
[if [ x"$enable_grub_emu" = xyes ]; then
# Check for curses libraries.]
AC_CHECK_LIB([ncurses], [wgetch], [LIBCURSES="-lncurses"],
[AC_CHECK_LIB([curses], [wgetch], [LIBCURSES="-lcurses"],
[AC_MSG_ERROR([(n)curses libraries are required to build `grub-emu'])])])
AC_SUBST([LIBCURSES])
[# Check for headers.]
AC_CHECK_HEADERS([ncurses/curses.h], [],
[AC_CHECK_HEADERS([ncurses.h], [],
[AC_CHECK_HEADERS([curses.h], [],
[AC_MSG_ERROR([(n)curses header files are required to build `grub-emu'])])])])
[fi]
AC_SUBST([enable_grub_emu])
AC_ARG_ENABLE([grub-fstest],
[AS_HELP_STRING([--enable-grub-fstest],
[build and install the `grub-fstest' debugging utility])])
AC_SUBST([enable_grub_fstest])
AC_ARG_ENABLE([grub-pe2elf],
[AS_HELP_STRING([--enable-grub-pe2elf],
[build and install the `grub-pe2elf' conversion utility])])
AC_SUBST([enable_grub_pe2elf])
# Output files.
AC_CONFIG_LINKS([include/grub/cpu:include/grub/$target_cpu
include/grub/machine:include/grub/$target_cpu/$platform])
AC_CONFIG_FILES([Makefile gensymlist.sh genkernsyms.sh])
AC_CONFIG_FILES([stamp-h], [echo timestamp > stamp-h])
AC_OUTPUT