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configure.ac
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# -*- 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.
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],[2.00],[[email protected]])
AC_CONFIG_AUX_DIR([build-aux])
# We don't want -g -O2 by default in CFLAGS
: ${CFLAGS=""}
# Checks for host and target systems.
AC_CANONICAL_HOST
save_program_prefix="${program_prefix}"
AC_CANONICAL_TARGET
program_prefix="${save_program_prefix}"
AM_INIT_AUTOMAKE([1.10.1])
AC_PREREQ(2.60)
AC_CONFIG_SRCDIR([include/grub/dl.h])
AC_CONFIG_HEADER([config-util.h])
# Program name transformations
AC_ARG_PROGRAM
grub_TRANSFORM([grub-bios-setup])
grub_TRANSFORM([grub-editenv])
grub_TRANSFORM([grub-install])
grub_TRANSFORM([grub-mkconfig])
grub_TRANSFORM([grub-mkfont])
grub_TRANSFORM([grub-mkimage])
grub_TRANSFORM([grub-glue-efi])
grub_TRANSFORM([grub-mklayout])
grub_TRANSFORM([grub-mkpasswd-pbkdf2])
grub_TRANSFORM([grub-mkrelpath])
grub_TRANSFORM([grub-mkrescue])
grub_TRANSFORM([grub-probe])
grub_TRANSFORM([grub-reboot])
grub_TRANSFORM([grub-script-check])
grub_TRANSFORM([grub-set-default])
grub_TRANSFORM([grub-sparc64-setup])
grub_TRANSFORM([grub-render-label])
# Optimization flag. Allow user to override.
if test "x$TARGET_CFLAGS" = x; then
TARGET_CFLAGS="$TARGET_CFLAGS -Os"
fi
# Default HOST_CPPFLAGS
HOST_CPPFLAGS="$HOST_CPPFLAGS -Wall -W"
HOST_CPPFLAGS="$HOST_CPPFLAGS -I\$(top_builddir)/include"
HOST_CPPFLAGS="$HOST_CPPFLAGS -DGRUB_UTIL=1"
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=mipsel;
machine_CPPFLAGS="$machine_CPPFLAGS -DGRUB_CPU_MIPSEL=1";
;;
mips|mips64)
target_cpu=mips;
machine_CPPFLAGS="$machine_CPPFLAGS -DGRUB_CPU_MIPS=1";
;;
arm*)
target_cpu=arm;
;;
aarch64*)
target_cpu=arm64;
;;
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"-"$target_vendor" in
i386-apple) platform=efi ;;
i386-*) platform=pc ;;
x86_64-apple) platform=efi ;;
x86_64-*) platform=pc ;;
powerpc-*) platform=ieee1275 ;;
powerpc64-*) platform=ieee1275 ;;
sparc64-*) platform=ieee1275 ;;
mipsel-*) platform=loongson ;;
mips-*) platform=arc ;;
ia64-*) platform=efi ;;
arm-*) platform=uboot ;;
arm64-*) platform=efi ;;
*) AC_MSG_ERROR([unsupported CPU: "$target_cpu"]) ;;
esac
else
platform="$with_platform"
fi
case "$target_cpu"-"$platform" in
x86_64-efi) ;;
x86_64-emu) ;;
x86_64-xen) ;;
x86_64-*) target_cpu=i386 ;;
powerpc64-ieee1275) target_cpu=powerpc ;;
esac
# Check if the platform is supported, make final adjustments.
case "$target_cpu"-"$platform" in
i386-efi) ;;
x86_64-efi) ;;
i386-xen) ;;
x86_64-xen) ;;
i386-pc) ;;
i386-multiboot) ;;
i386-coreboot) ;;
i386-linuxbios) platform=coreboot ;;
i386-ieee1275) ;;
i386-qemu) ;;
powerpc-ieee1275) ;;
sparc64-ieee1275) ;;
ia64-efi) ;;
mips-qemu_mips) ;;
mips-qemu-mips) platform=qemu_mips;;
mips-arc) ;;
mipsel-arc) ;;
mipsel-qemu_mips) ;;
mipsel-qemu-mips) platform=qemu_mips;;
mipsel-yeeloong) platform=loongson ;;
mipsel-fuloong) platform=loongson ;;
mipsel-loongson) ;;
arm-uboot) ;;
arm-efi) ;;
arm64-efi) ;;
*-emu) ;;
*) AC_MSG_ERROR([platform "$platform" is not supported for target CPU "$target_cpu"]) ;;
esac
if test x$platform != xemu ; then
case "$target_cpu" in
i386 | powerpc) target_m32=1 ;;
x86_64 | sparc64) target_m64=1 ;;
esac
fi
if test x"$target_cpu-$platform" = xsparc64-emu ; then
target_m64=1 ;
fi
case "$target_os" in
windows* | mingw32*) target_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 "$host_os" in
gnu*) host_kernel=hurd ;;
linux*) host_kernel=linux ;;
freebsd* | kfreebsd*-gnu) host_kernel=kfreebsd ;;
netbsd*) host_kernel=netbsd ;;
solaris*) host_kernel=illumos ;;
darwin*) host_kernel=xnu ;;
cygwin | windows* | mingw32*) host_kernel=windows ;;
esac
case "$host_os" in
cygwin | windows* | mingw32*) have_exec=n ;;
aros*) have_exec=n ;;
*) have_exec=y;;
esac
case "$platform" in
coreboot) machine_CPPFLAGS="$machine_CPPFLAGS -DGRUB_MACHINE_COREBOOT=1" ;;
multiboot) machine_CPPFLAGS="$machine_CPPFLAGS -DGRUB_MACHINE_MULTIBOOT=1" ;;
efi) machine_CPPFLAGS="$machine_CPPFLAGS -DGRUB_MACHINE_EFI=1" ;;
xen) machine_CPPFLAGS="$machine_CPPFLAGS -DGRUB_MACHINE_XEN=1" ;;
ieee1275) machine_CPPFLAGS="$machine_CPPFLAGS -DGRUB_MACHINE_IEEE1275=1" ;;
uboot) machine_CPPFLAGS="$machine_CPPFLAGS -DGRUB_MACHINE_UBOOT=1" ;;
qemu) machine_CPPFLAGS="$machine_CPPFLAGS -DGRUB_MACHINE_QEMU=1" ;;
pc) machine_CPPFLAGS="$machine_CPPFLAGS -DGRUB_MACHINE_PCBIOS=1" ;;
emu) machine_CPPFLAGS="$machine_CPPFLAGS -DGRUB_MACHINE_EMU=1" ;;
loongson) machine_CPPFLAGS="$machine_CPPFLAGS -DGRUB_MACHINE_MIPS_LOONGSON=1 -DGRUB_MACHINE_MIPS_BONITO=1" ;;
qemu_mips) machine_CPPFLAGS="$machine_CPPFLAGS -DGRUB_MACHINE_MIPS_QEMU_MIPS=1 -DGRUB_MACHINE_MIPS_BONITO=1" ;;
arc) machine_CPPFLAGS="$machine_CPPFLAGS -DGRUB_MACHINE_ARC=1" ;;
esac
case "$target_cpu" in
arm) machine_CPPFLAGS="$machine_CPPFLAGS -DGRUB_MACHINE_ARM=1" ;;
arm64) machine_CPPFLAGS="$machine_CPPFLAGS -DGRUB_MACHINE_ARM64=1" ;;
mips |mipsel) machine_CPPFLAGS="$machine_CPPFLAGS -DGRUB_MACHINE_MIPS=1" ;;
sparc64) machine_CPPFLAGS="$machine_CPPFLAGS -DGRUB_MACHINE_SPARC64=1" ;;
esac
if test x${target_cpu} = xmipsel ; then
machine_CPPFLAGS="$machine_CPPFLAGS -DGRUB_MACHINE=`echo mips_$platform | sed y,abcdefghijklmnopqrstuvwxyz,ABCDEFGHIJKLMNOPQRSTUVWXYZ,`"
else
machine_CPPFLAGS="$machine_CPPFLAGS -DGRUB_MACHINE=`echo ${target_cpu}_$platform | sed y,abcdefghijklmnopqrstuvwxyz,ABCDEFGHIJKLMNOPQRSTUVWXYZ,` -DGRUB_TARGET_CPU_`echo ${target_cpu} | sed y,abcdefghijklmnopqrstuvwxyz,ABCDEFGHIJKLMNOPQRSTUVWXYZ,`=1"
fi
case "${target_cpu}-$platform" in
mips-arc)
TARGET_LINK_ADDR=0x88200000
TARGET_DECOMPRESSOR_LINK_ADDR=0x88100000
;;
mipsel-arc)
TARGET_LINK_ADDR=0x80700000
TARGET_DECOMPRESSOR_LINK_ADDR=0x80600000
;;
mips*-qemu_mips | mips*-loongson)
TARGET_DECOMPRESSOR_LINK_ADDR=0x80100000
;;
esac
AC_SUBST(TARGET_LINK_ADDR)
AC_SUBST(TARGET_DECOMPRESSOR_LINK_ADDR)
TARGET_CPPFLAGS="$TARGET_CPPFLAGS $machine_CPPFLAGS"
AC_SUBST(host_cpu)
AC_SUBST(host_os)
AC_SUBST(host_kernel)
AC_SUBST(target_cpu)
AC_SUBST(platform)
# Define default variables
have_with_bootdir=n
AC_ARG_WITH([bootdir],
AS_HELP_STRING([--with-bootdir=DIR],
[set the name of /boot directory [[guessed]]]),
[have_with_bootdir=y],
[have_with_bootdir=n])
if test x$have_with_bootdir = xy; then
bootdirname="$with_bootdir"
else
case "$host_os" in
netbsd* | openbsd*)
# Because /boot is used for the boot block in NetBSD and OpenBSD,
bootdirname='' ;;
*) bootdirname='boot' ;;
esac
fi
AC_SUBST(bootdirname)
AC_DEFINE_UNQUOTED(GRUB_BOOT_DIR_NAME, "$bootdirname",
[Default boot directory name]")
AC_ARG_WITH([grubdir],
AS_HELP_STRING([--with-grubdir=DIR],
[set the name of grub directory [[guessed]]]),
[grubdirname="$with_grubdir"],
[grubdirname="$PACKAGE"])
AC_SUBST(grubdirname)
AC_DEFINE_UNQUOTED(GRUB_DIR_NAME, "$grubdirname",
[Default grub directory name])
#
# 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
AC_PROG_RANLIB
AC_PROG_INSTALL
AC_PROG_AWK
AC_PROG_LEX
AC_PROG_YACC
AC_PROG_MAKE_SET
AC_PROG_MKDIR_P
AC_PROG_LN_S
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_PROGS(MAKEINFO, makeinfo true)
#
# Checks for host programs.
#
AC_PROG_CC
gl_EARLY
AC_PROG_CXX
AM_PROG_CC_C_O
AM_PROG_AS
# Must be GCC.
test "x$GCC" = xyes || AC_MSG_ERROR([GCC is required])
AC_CHECK_PROG(HAVE_CXX, $CXX, yes, no)
AC_GNU_SOURCE
AM_GNU_GETTEXT([external])
AC_SYS_LARGEFILE
# Identify characteristics of the host architecture.
unset ac_cv_c_bigendian
if test x"$target_cpu-$platform" = xsparc64-emu ; then
CFLAGS="$CFLAGS -m64"
HOST_CFLAGS="$HOST_CFLAGS -m64"
fi
AC_C_BIGENDIAN
AC_CHECK_SIZEOF(void *)
AC_CHECK_SIZEOF(long)
case "$host_os" in
cygwin | windows* | mingw32*)
HOST_CPPFLAGS="$HOST_CPPFLAGS -DUNICODE=1 -D_WIN32_WINNT=0x0500"
CPPFLAGS="$CPPFLAGS -DUNICODE=1 -D_WIN32_WINNT=0x0500"
AC_CHECK_SIZEOF(TCHAR,,[#include <windows.h>])
;;
esac
if test x$USE_NLS = xno; then
HOST_CFLAGS="$HOST_CFLAGS -fno-builtin-gettext"
fi
if test "x$cross_compiling" = xyes; then
AC_MSG_WARN([cannot generate manual pages while cross compiling])
else
AC_PATH_PROG(HELP2MAN, help2man)
fi
# Check for functions and headers.
AC_CHECK_FUNCS(posix_memalign memalign getextmntent)
AC_CHECK_HEADERS(sys/param.h sys/mount.h sys/mnttab.h sys/mkdev.h limits.h)
AC_CHECK_MEMBERS([struct statfs.f_fstypename],,,[$ac_includes_default
#include <sys/param.h>
#include <sys/mount.h>])
AC_CHECK_MEMBERS([struct statfs.f_mntfromname],,,[$ac_includes_default
#include <sys/param.h>
#include <sys/mount.h>])
# For opendisk() and getrawpartition() on NetBSD.
# Used in util/deviceiter.c and in util/hostdisk.c.
AC_CHECK_HEADER([util.h], [
AC_CHECK_LIB([util], [opendisk], [
LIBUTIL="-lutil"
AC_DEFINE(HAVE_OPENDISK, 1, [Define if opendisk() in -lutil can be used])
])
AC_CHECK_LIB([util], [getrawpartition], [
LIBUTIL="-lutil"
AC_DEFINE(HAVE_GETRAWPARTITION, 1, [Define if getrawpartition() in -lutil can be used])
])
])
AC_SUBST([LIBUTIL])
AC_CACHE_CHECK([whether -Wtrampolines work], [grub_cv_host_cc_wtrampolines], [
SAVED_CFLAGS="$CFLAGS"
CFLAGS="$HOST_CFLAGS -Wtrampolines -Werror"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stdarg.h>
int va_arg_func (int fixed, va_list args);]], [[]])],
[grub_cv_host_cc_wtrampolines=yes],
[grub_cv_host_cc_wtrampolines=no])
CFLAGS="$SAVED_CFLAGS"
])
if test x"$grub_host_cv_cc_wtrampolines" = xyes ; then
HOST_CFLAGS="$HOST_CFLAGS -Wtrampolines"
fi
#
# Check for host and build compilers.
#
HOST_CC=$CC
AC_CHECK_PROGS(BUILD_CC, [gcc egcs cc])
test -z "$BUILD_CC" && AC_MSG_ERROR([none of gcc, egcs and cc is found. set BUILD_CC manually.])
BUILD_CPP="$BUILD_CC -E"
case "$build_os" in
haiku*) BUILD_LIBM= ;;
*) BUILD_LIBM=-lm ;;
esac
# For gnulib.
gl_INIT
WARN_FLAGS="-Wall -W -Wshadow -Wpointer-arith -Wundef -Wchar-subscripts -Wcomment -Wdeprecated-declarations -Wdisabled-optimization -Wdiv-by-zero -Wfloat-equal -Wformat-extra-args -Wformat-security -Wformat-y2k -Wimplicit -Wimplicit-function-declaration -Wimplicit-int -Wmain -Wmissing-braces -Wmissing-format-attribute -Wmultichar -Wparentheses -Wpointer-arith -Wreturn-type -Wsequence-point -Wshadow -Wsign-compare -Wswitch -Wtrigraphs -Wundef -Wunknown-pragmas -Wunused -Wunused-function -Wunused-label -Wunused-parameter -Wunused-value -Wunused-variable -Wwrite-strings -Wnested-externs -Wstrict-prototypes"
EXTRA_WARN_FLAGS="-Wold-style-definition -Wextra -Wattributes -Wendif-labels -Winit-self -Wint-to-pointer-cast -Winvalid-pch -Wmissing-field-initializers -Wnonnull -Woverflow -Wvla -Wpointer-to-int-cast -Wstrict-aliasing -Wvariadic-macros -Wvolatile-register-var -Wpointer-sign"
HOST_CFLAGS="$HOST_CFLAGS $WARN_FLAGS -Wcast-align"
AC_CACHE_CHECK([which extra warnings work], [grub_cv_cc_w_extra_flags], [
SAVED_CFLAGS="$CFLAGS"
grub_cv_cc_w_extra_flags=
for x in $EXTRA_WARN_FLAGS; do
CFLAGS="$HOST_CFLAGS $x -Werror"
AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[]])], [flag=1], [flag=0])
if test x$flag = x1 ; then
grub_cv_cc_w_extra_flags="$grub_cv_cc_w_extra_flags $x"
fi
done
CFLAGS="$SAVED_CFLAGS"
])
HOST_CFLAGS="$HOST_CFLAGS $grub_cv_cc_w_extra_flags"
#
# Check for target programs.
#
# Find tools for the target.
if test "x$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(TARGET_OBJCOPY, objcopy)
AC_CHECK_TOOL(TARGET_STRIP, strip)
AC_CHECK_TOOL(TARGET_NM, nm)
AC_CHECK_TOOL(TARGET_RANLIB, ranlib)
ac_tool_prefix="$tmp_ac_tool_prefix"
else
if test "x$TARGET_CC" = x; then
TARGET_CC=$CC
fi
AC_CHECK_TOOL(TARGET_OBJCOPY, objcopy)
AC_CHECK_TOOL(TARGET_STRIP, strip)
AC_CHECK_TOOL(TARGET_NM, nm)
AC_CHECK_TOOL(TARGET_RANLIB, ranlib)
fi
AC_SUBST(HOST_CC)
AC_SUBST(BUILD_CC)
AC_SUBST(BUILD_CFLAGS)
AC_SUBST(BUILD_CPPFLAGS)
AC_SUBST(TARGET_CC)
AC_SUBST(TARGET_NM)
AC_SUBST(TARGET_RANLIB)
AC_SUBST(TARGET_STRIP)
AC_SUBST(TARGET_OBJCOPY)
# Test the C compiler for the target environment.
tmp_CC="$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 $WARN_FLAGS -g -Wredundant-decls -Wmissing-prototypes -Wmissing-declarations"
TARGET_CCASFLAGS="$TARGET_CCASFLAGS -g"
if test "x$target_cpu" != xi386 && test "x$target_cpu" != xx86_64; then
TARGET_CFLAGS="$TARGET_CFLAGS -Wcast-align"
fi
AC_CACHE_CHECK([which extra warnings work], [grub_cv_target_cc_w_extra_flags], [
LDFLAGS="$TARGET_LDFLAGS -nostdlib -static"
grub_cv_target_cc_w_extra_flags=
for x in $EXTRA_WARN_FLAGS; do
CFLAGS="$TARGET_CFLAGS $x -Werror"
AC_LINK_IFELSE([AC_LANG_PROGRAM([[
asm (".globl start; start:");
void __main (void);
void __main (void) {}
int main (void);
]], [[]])], [flag=1], [flag=0])
if test x$flag = x1 ; then
grub_cv_target_cc_w_extra_flags="$grub_cv_target_cc_w_extra_flags $x"
fi
done
])
TARGET_CFLAGS="$TARGET_CFLAGS $grub_cv_target_cc_w_extra_flags"
AC_CACHE_CHECK([if compiling with clang], [grub_cv_cc_target_clang]
[
CFLAGS="$TARGET_CFLAGS"
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([], [[
#ifdef __clang__
#error "is clang"
#endif
]])],
[grub_cv_cc_target_clang=no], [grub_cv_cc_target_clang=yes])])
# on x86 clang doesn't support .code16
# on arm clang doesn't support .arch directive
# on mips clang doesn't support privilegied instructions, doubleword store/load
# and crashes with hand-written assembly
if test "x$grub_cv_cc_target_clang" = xyes && ( test "x$target_cpu" = xi386 \
|| test "x$target_cpu" = xx86_64 || test "x$target_cpu" = xarm \
|| test "x$target_cpu" = xmips || test "x$target_cpu" = xmipsel ); then
TARGET_CCASFLAGS="$TARGET_CCASFLAGS -no-integrated-as"
fi
if test "x$grub_cv_cc_target_clang" = xyes && test "x$target_cpu" = xpowerpc; then
AC_CACHE_CHECK([if clang can handle ame instruction], [grub_cv_cc_target_clang_ame]
[
CFLAGS="$TARGET_CFLAGS"
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([], [[
unsigned int a = 0, b = 0;
asm volatile ("{ame|addme} %0,%1" : "=r" (a) : "r" (b));
if (a)
return 1;
]])],
[grub_cv_cc_target_clang_ame=yes], [grub_cv_cc_target_clang_ame=no])])
# clang <= 3.3 doesn't handle most of ppc assembly, not even inline assembly
# used by gcrypt
if test x$grub_cv_cc_target_clang_ame = xno ; then
TARGET_CCASFLAGS="$TARGET_CCASFLAGS -no-integrated-as"
TARGET_CFLAGS="$TARGET_CFLAGS -no-integrated-as"
fi
fi
if test "x$target_cpu" = xi386 && test "x$platform" != xemu; then
TARGET_CFLAGS="$TARGET_CFLAGS -march=i386"
fi
if test "x$target_m32" = x1; then
# Force 32-bit mode.
TARGET_CFLAGS="$TARGET_CFLAGS -m32"
TARGET_CCASFLAGS="$TARGET_CCASFLAGS -m32"
TARGET_CPPFLAGS="$TARGET_CPPFLAGS -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_CPPFLAGS="$TARGET_CPPFLAGS -m64"
TARGET_LDFLAGS="$TARGET_LDFLAGS -m64"
TARGET_MODULE_FORMAT="elf64"
fi
if test "x$grub_cv_cc_target_clang" = xno && test "x$target_cpu" = xi386 && test "x$platform" != xemu && test "x$platform" != xefi; then
TARGET_CFLAGS="$TARGET_CFLAGS -mrtd -mregparm=3"
fi
# on mips redirect cache flushing function to non-existant one.
if test "x$target_cpu" = xmips || test "x$target_cpu" = xmipsel ; then
AC_CACHE_CHECK([whether -mflush-func=grub_red_herring works], [grub_cv_cc_mflush_func], [
CFLAGS="$TARGET_CFLAGS -mflush-func=grub_red_herring -Werror"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
[grub_cv_cc_mflush_func=yes],
[grub_cv_cc_mflush_func=no])
])
if test "x$grub_cv_cc_mflush_func" = xyes; then
TARGET_CFLAGS="$TARGET_CFLAGS -mflush-func=grub_red_herring"
fi
fi
# Force no alignment to save space on i386.
if test "x$target_cpu" = xi386; then
AC_CACHE_CHECK([whether -falign-loops works], [grub_cv_cc_falign_loop], [
CFLAGS="$TARGET_CFLAGS -falign-loops=1 -Werror"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
[grub_cv_cc_falign_loop=yes],
[grub_cv_cc_falign_loop=no])
])
AC_CACHE_CHECK([whether -malign-loops works], [grub_cv_cc_malign_loop], [
CFLAGS="$TARGET_CFLAGS -malign-loops=1 -Werror"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
[grub_cv_cc_malign_loop=yes],
[grub_cv_cc_malign_loop=no])
])
if test "x$grub_cv_cc_falign_loop" = xyes; then
TARGET_CFLAGS="$TARGET_CFLAGS -falign-jumps=1 -falign-loops=1 -falign-functions=1"
elif test "x$grub_cv_cc_malign_loop" = xyes; then
TARGET_CFLAGS="$TARGET_CFLAGS -malign-jumps=1 -malign-loops=1 -malign-functions=1"
fi
fi
AC_CACHE_CHECK([whether -freg-struct-return works], [grub_cv_cc_freg_struct_return], [
CFLAGS="$TARGET_CFLAGS -freg-struct-return -Werror"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
[grub_cv_cc_freg_struct_return=yes],
[grub_cv_cc_freg_struct_return=no])
])
if test "x$grub_cv_cc_freg_struct_return" = xyes; then
TARGET_CFLAGS="$TARGET_CFLAGS -freg-struct-return"
fi
if ( test "x$target_cpu" = xi386 || test "x$target_cpu" = xx86_64 ) && test "x$platform" != xemu; then
# Some toolchains enable these features by default, but they need
# registers that aren't set up properly in GRUB.
TARGET_CFLAGS="$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], [
CFLAGS="$TARGET_CFLAGS -fno-dwarf2-cfi-asm"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
[grub_cv_cc_fno_dwarf2_cfi_asm=yes],
[grub_cv_cc_fno_dwarf2_cfi_asm=no])
])
if test "x$grub_cv_cc_fno_dwarf2_cfi_asm" = xyes; then
TARGET_CFLAGS="$TARGET_CFLAGS -fno-dwarf2-cfi-asm"
fi
if test x"$target_os" = xcygwin; then
AC_CACHE_CHECK([whether option -fno-reorder-functions works], grub_cv_cc_no_reorder_functions, [
CFLAGS="$TARGET_CFLAGS -fno-reorder-functions"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
[grub_cv_cc_no_reorder_functions=yes],
[grub_cv_cc_no_reorder_functions=no])
])
fi
if test x"$target_os" = xcygwin && test "x$grub_cv_cc_no_reorder_functions" = xyes; then
TARGET_CFLAGS="$TARGET_CFLAGS -fno-reorder-functions"
fi
# By default, GCC 4.6 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-asynchronous-unwind-tables works], [grub_cv_cc_fno_asynchronous_unwind_tables], [
CFLAGS="$TARGET_CFLAGS -fno-dwarf2-cfi-asm"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
[grub_cv_cc_fno_asynchronous_unwind_tables=yes],
[grub_cv_cc_fno_asynchronous_unwind_tables=no])
])
if test "x$grub_cv_cc_fno_asynchronous_unwind_tables" = xyes; then
TARGET_CFLAGS="$TARGET_CFLAGS -fno-asynchronous-unwind-tables"
fi
# For platforms where ELF is not the default link format.
case "${target_os}" in
cygwin)
# FIXME: put proper test here
NEED_REGISTER_FRAME_INFO=1
;;
*) NEED_REGISTER_FRAME_INFO=0 ;;
esac
AC_ARG_ENABLE([efiemu],
[AS_HELP_STRING([--enable-efiemu],
[build and install the efiemu runtimes (default=guessed)])])
if test x"$enable_efiemu" = xno ; then
efiemu_excuse="explicitly disabled"
fi
if test x"$grub_cv_target_cc_link_format" = x-mi386pe ; then
efiemu_excuse="not available on cygwin"
fi
if test x"$target_cpu" != xi386 ; then
efiemu_excuse="only available on i386"
fi
if test x"$platform" = xefi ; then
efiemu_excuse="not available on efi"
fi
if test x"$efiemu_excuse" = x ; then
AC_CACHE_CHECK([whether options required for efiemu work], grub_cv_cc_efiemu, [
CFLAGS="-m64 -nostdlib -O2 -mcmodel=large -mno-red-zone"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
[grub_cv_cc_efiemu=yes],
[grub_cv_cc_efiemu=no])
])
if test x$grub_cv_cc_efiemu = xno; then
efiemu_excuse="cannot compile with -m64 -mcmodel=large -mno-red-zone -nostdlib"
fi
fi
if test x"$efiemu_excuse" = x ; then
AC_CACHE_CHECK([for efiemu64 linking format], [grub_cv_target_cc_efiemu64_link_format], [
grub_cv_target_cc_efiemu64_link_format=unknown
for format in -melf_x86_64 -melf_x86_64_fbsd -melf_x86_64_obsd -melf_x86_64_haiku -arch,x86_64; do
CFLAGS="-m64 -nostdlib -O2 -mcmodel=large -mno-red-zone"
LDFLAGS="-m64 -Wl,$format -nostdlib -static"
AC_LINK_IFELSE([AC_LANG_PROGRAM([[
asm (".globl start; start:");
asm (".globl _start; _start:");
asm (".globl __start; __start:");
void __main (void);
void __main (void) {}
]], [[]])], [flag=1], [flag=0])
if test x"$flag" = x1; then
grub_cv_target_cc_efiemu64_link_format="$format"
break;
fi
done])
if test x"$grub_cv_target_cc_efiemu64_link_format" = xunknown; then
efiemu_excuse="no suitable link format for efiemu64 found"
else
EFIEMU64_LINK_FORMAT="-Wl,$grub_cv_target_cc_efiemu64_link_format"
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"$efiemu_excuse" = x ; then
enable_efiemu=yes
else
enable_efiemu=no
fi
AC_SUBST([enable_efiemu])
AC_SUBST([EFIEMU64_LINK_FORMAT])
CFLAGS="$TARGET_CFLAGS"
if test x"$target_cpu" = xi386 || test x"$target_cpu" = xx86_64; then
AC_CACHE_CHECK([for target linking format], [grub_cv_target_cc_link_format], [
grub_cv_target_cc_link_format=unknown
for format in -melf_${target_cpu} -melf_${target_cpu}_fbsd -melf_${target_cpu}_obsd -melf_${target_cpu}_haiku -m${target_cpu}pe -arch,${target_cpu}; do
if test x${target_cpu} != xi386 && test x$format = x${target_cpu}pe; then
continue
fi
CFLAGS="$TARGET_CFLAGS"
LDFLAGS="$TARGET_LDFLAGS -Wl,$format -nostdlib -static"
AC_LINK_IFELSE([AC_LANG_PROGRAM([[
asm (".globl start; start:");
asm (".globl _start; _start:");
asm (".globl __start; __start:");
void __main (void);
void __main (void) {}
]], [[]])], [flag=1], [flag=0])
if test x"$flag" = x1; then
grub_cv_target_cc_link_format="$format"
break;
fi
done])
if test x"$grub_cv_target_cc_link_format" = xunknown; then
AC_MSG_ERROR([no suitable link format found])
fi
TARGET_LDFLAGS="$TARGET_LDFLAGS -Wl,$grub_cv_target_cc_link_format"
if test x"$grub_cv_target_cc_link_format" = x-mi386pe; then
TARGET_OBJ2ELF='./build-grub-pe2elf';
fi
fi
if test x$grub_cv_target_cc_link_format = x-arch,i386 || test x$grub_cv_target_cc_link_format = x-arch,x86_64; then
TARGET_APPLE_LINKER=1
AC_CHECK_PROG([TARGET_OBJCONV], [objconv], [objconv], [])
if test "x$TARGET_OBJCONV" = x ; then
AC_CHECK_PROG([TARGET_OBJCONV], [objconv], [./objconv], [], [.])
fi
if test "x$TARGET_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'
TARGET_IMG_LDFLAGS_AC='-nostdlib -static -Wl,-preload -Wl,-segalign,20'
TARGET_IMG_BASE_LDOPT="-Wl,-image_base"
TARGET_LDFLAGS_OLDMAGIC=""
elif test x$grub_cv_target_cc_link_format = x-mi386pe; then
TARGET_APPLE_LINKER=0
TARGET_LDFLAGS_OLDMAGIC="-Wl,-N"
TARGET_IMG_LDSCRIPT='$(top_srcdir)'"/${grub_coredir}/conf/i386-cygwin-img-ld.sc"
TARGET_IMG_LDFLAGS="-Wl,-T${TARGET_IMG_LDSCRIPT}"
TARGET_IMG_LDFLAGS_AC="-Wl,-T${srcdir}/${grub_coredir}/conf/i386-cygwin-img-ld.sc"
TARGET_IMG_BASE_LDOPT="-Wl,-Ttext"
TARGET_IMG_CFLAGS=
else
TARGET_APPLE_LINKER=0
TARGET_LDFLAGS_OLDMAGIC="-Wl,-N"
TARGET_IMG_LDSCRIPT=
TARGET_IMG_LDFLAGS='-Wl,-N'
TARGET_IMG_LDFLAGS_AC='-Wl,-N'
TARGET_IMG_BASE_LDOPT="-Wl,-Ttext"
TARGET_IMG_CFLAGS=
fi
AC_SUBST(TARGET_LDFLAGS_OLDMAGIC)
LDFLAGS="$TARGET_LDFLAGS"
if test "$target_cpu" = x86_64 || test "$target_cpu-$platform" = sparc64-emu ; then
# Use large model to support 4G memory
AC_CACHE_CHECK([whether option -mcmodel=large works], grub_cv_cc_mcmodel, [
CFLAGS="$TARGET_CFLAGS -m64 -mcmodel=large"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
[grub_cv_cc_mcmodel=yes],
[grub_cv_cc_mcmodel=no])
])
if test "x$grub_cv_cc_mcmodel" = xyes; then
TARGET_CFLAGS="$TARGET_CFLAGS -mcmodel=large"
elif test "$target_cpu-$platform" = sparc64-emu; then
TARGET_CFLAGS="$TARGET_CFLAGS -mcmodel=medany"
fi
fi
if test "$target_cpu"-"$platform" = x86_64-efi; then
# 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="$TARGET_CFLAGS -m64 -mno-red-zone"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
[grub_cv_cc_no_red_zone=yes],
[grub_cv_cc_no_red_zone=no])
])
if test "x$grub_cv_cc_no_red_zone" = xno; then
AC_MSG_ERROR([-mno-red-zone not supported, upgrade your gcc])
fi
TARGET_CFLAGS="$TARGET_CFLAGS -mno-red-zone"
fi
if test "x$target_cpu" = xarm; then
AC_CACHE_CHECK([whether option -mlong-calls works], grub_cv_cc_mlong_calls, [
CFLAGS="$TARGET_CFLAGS -mlong-calls -Werror"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
[grub_cv_cc_mlong_calls=yes],
[grub_cv_cc_mlong_calls=no])
])
if test "x$grub_cv_cc_mlong_calls" = xyes; then
TARGET_CFLAGS="$TARGET_CFLAGS -mlong-calls"
fi
fi
#
# Compiler features.
#
CFLAGS="$TARGET_CFLAGS"
# 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]
CFLAGS="$TARGET_CFLAGS"
# Position independent executable.
grub_CHECK_PIC
[# On most platforms we don't want PIC as it only makes relocations harder
# and code less efficient. On mips we want to have one got table per module
# and reload $gp in every function.
# GCC implements it using symbol __gnu_local_gp in non-PIC as well.
# However with clang we need PIC for this reloading to happen.
# Since default varies across dictributions use either -fPIC or -fno-PIC
# explicitly.
if ( test x$target_cpu = xmips || test x$target_cpu = xmipsel ) && test "x$grub_cv_cc_target_clang" = xyes ; then
TARGET_CFLAGS="$TARGET_CFLAGS -fPIC"
elif [ x"$pic_possible" = xyes ]; then
TARGET_CFLAGS="$TARGET_CFLAGS -fno-PIC"
fi]
CFLAGS="$TARGET_CFLAGS"
# 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
CFLAGS="$TARGET_CFLAGS"
grub_CHECK_STACK_ARG_PROBE
# Cygwin's GCC uses alloca() to probe the stackframe on static
# stack allocations above some threshold.
if test x"$sap_possible" = xyes; then
TARGET_CFLAGS="$TARGET_CFLAGS -mno-stack-arg-probe"
fi
CFLAGS="$TARGET_CFLAGS"
# -mno-unaligned-access -mstrict-align
if test "$target_cpu" = arm; then
AC_CACHE_CHECK([for compile options to get strict alignment], [grub_cv_target_cc_strict_align], [
grub_cv_target_cc_strict_align=
for arg in -mno-unaligned-access "-Xclang -mstrict-align" -mstrict-align; do
CFLAGS="$TARGET_CFLAGS $arg -Werror"
LDFLAGS="$TARGET_LDFLAGS"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])], [flag=1], [flag=0])
if test x"$flag" = x1; then
grub_cv_target_cc_strict_align="$arg"
break;
fi
done])
TARGET_CFLAGS="$TARGET_CFLAGS $grub_cv_target_cc_strict_align"
if test x"$grub_cv_target_cc_strict_align" = x"-Xclang -mstrict-align"; then
TARGET_LDFLAGS="$TARGET_LDFLAGS -Qunused-arguments"
fi
AC_CACHE_CHECK([if compiler generates unaligned accesses], [grub_cv_cc_target_emits_unaligned],
[CFLAGS="$TARGET_CFLAGS"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [[
#ifdef __ARM_FEATURE_UNALIGNED
#error "unaligned"
#endif
]])],
[grub_cv_cc_target_emits_unaligned=no], [grub_cv_cc_target_emits_unaligned=yes])])
if test x$grub_cv_cc_target_emits_unaligned = xyes; then
AC_MSG_ERROR([compiler generates unaligned accesses])
fi
fi
# Set them to their new values for the tests below.
CC="$TARGET_CC"
if test "x$TARGET_APPLE_LINKER" = x1 ; then
CFLAGS="$TARGET_CFLAGS -nostdlib -static -Wno-error"
else
CFLAGS="$TARGET_CFLAGS -nostdlib -Wno-error"
fi
CPPFLAGS="$TARGET_CPPFLAGS"
if test x$target_cpu = xi386 || test x$target_cpu = xx86_64 || test "x$grub_cv_cc_target_clang" = xyes ; then
TARGET_LIBGCC=
else
TARGET_LIBGCC=-lgcc
fi
LIBS="$TARGET_LIBGCC"
grub_ASM_USCORE
if test "x$TARGET_APPLE_LINKER" = x0 ; then
if test x$grub_cv_asm_uscore = xyes; then
DEFSYM="-Wl,--defsym,_abort=_main -Wl,--defsym,__main=_main"
else
DEFSYM="-Wl,--defsym,abort=main -Wl,--defsym,_main=main -Wl,--defsym,__main=main"
fi
CFLAGS="$TARGET_CFLAGS -nostdlib $DEFSYM"
fi
# Check for libgcc symbols
AC_CHECK_FUNCS(__bswapsi2 __bswapdi2 __ashldi3 __ashrdi3 __lshrdi3 __ucmpdi2 _restgpr_14_x)
if test "x$TARGET_APPLE_LINKER" = x1 ; then
CFLAGS="$TARGET_CFLAGS -nostdlib -static"
else
CFLAGS="$TARGET_CFLAGS -nostdlib"
fi
LIBS=""
# Defined in aclocal.m4.
grub_PROG_TARGET_CC
if test "x$TARGET_APPLE_LINKER" != x1 ; then