forked from tsoome/grub
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathconfigure.ac
1845 lines (1603 loc) · 59.4 KB
/
configure.ac
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
# -*- 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, variables with prefix "BUILD_"
dnl (such as BUILD_CC, BUILD_CFLAGS, etc.) for the build type and variables
dnl with the prefix "TARGET_" (such as TARGET_CC, TARGET_CFLAGS, etc.) are
dnl used for the target type. See INSTALL for full list of variables.
AC_INIT([GRUB],[2.02~beta2],[[email protected]])
AC_CONFIG_AUX_DIR([build-aux])
# We don't want -g -O2 by default in CFLAGS
: ${CFLAGS=""}
# Checks for build, host and target systems.
AC_CANONICAL_BUILD
AC_CANONICAL_HOST
save_program_prefix="${program_prefix}"
AC_CANONICAL_TARGET
program_prefix="${save_program_prefix}"
AM_INIT_AUTOMAKE([1.10.1])
AC_PREREQ(2.60)
AC_CONFIG_SRCDIR([include/grub/dl.h])
AC_CONFIG_HEADER([config-util.h])
# Program name transformations
AC_ARG_PROGRAM
grub_TRANSFORM([grub-bios-setup])
grub_TRANSFORM([grub-editenv])
grub_TRANSFORM([grub-install])
grub_TRANSFORM([grub-mkconfig])
grub_TRANSFORM([grub-mkfont])
grub_TRANSFORM([grub-mkimage])
grub_TRANSFORM([grub-glue-efi])
grub_TRANSFORM([grub-mklayout])
grub_TRANSFORM([grub-mkpasswd-pbkdf2])
grub_TRANSFORM([grub-mkrelpath])
grub_TRANSFORM([grub-mkrescue])
grub_TRANSFORM([grub-probe])
grub_TRANSFORM([grub-reboot])
grub_TRANSFORM([grub-script-check])
grub_TRANSFORM([grub-set-default])
grub_TRANSFORM([grub-sparc64-setup])
grub_TRANSFORM([grub-render-label])
grub_TRANSFORM([grub-file])
# Optimization flag. Allow user to override.
if test "x$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="$machine_CPPFLAGS -DGRUB_MACHINE_MIPS_LOONGSON=1" ;;
qemu_mips) machine_CPPFLAGS="$machine_CPPFLAGS -DGRUB_MACHINE_MIPS_QEMU_MIPS=1" ;;
arc) machine_CPPFLAGS="$machine_CPPFLAGS -DGRUB_MACHINE_ARC=1" ;;
esac
if test x${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,`"
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
dnl FIXME proper test seems to require too deep dive into Autoconf internals.
dnl For now just list known platforms that we support.
case "$build_os" in
cygwin*|mingw32*|mingw64*) BUILD_EXEEXT=.exe ;;
*) BUILD_EXEEXT= ;;
esac
AC_SUBST(BUILD_EXEEXT)
# For gnulib.
gl_INIT
WARN_FLAGS="-Wall -W -Wshadow -Wpointer-arith -Wundef -Wchar-subscripts -Wcomment -Wdeprecated-declarations -Wdisabled-optimization -Wdiv-by-zero -Wfloat-equal -Wformat-extra-args -Wformat-security -Wformat-y2k -Wimplicit -Wimplicit-function-declaration -Wimplicit-int -Wmain -Wmissing-braces -Wmissing-format-attribute -Wmultichar -Wparentheses -Wreturn-type -Wsequence-point -Wshadow -Wsign-compare -Wswitch -Wtrigraphs -Wunknown-pragmas -Wunused -Wunused-function -Wunused-label -Wunused-parameter -Wunused-value -Wunused-variable -Wwrite-strings -Wnested-externs -Wstrict-prototypes"
EXTRA_WARN_FLAGS="-Wextra -Wattributes -Wendif-labels -Winit-self -Wint-to-pointer-cast -Winvalid-pch -Wmissing-field-initializers -Wnonnull -Woverflow -Wvla -Wpointer-to-int-cast -Wstrict-aliasing -Wvariadic-macros -Wvolatile-register-var -Wpointer-sign -Wmissing-include-dirs -Wmissing-prototypes -Wmissing-declarations -Wformat=2"
HOST_CFLAGS="$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=$CC
fi
AC_CHECK_TOOL(TARGET_OBJCOPY, objcopy)
AC_CHECK_TOOL(TARGET_STRIP, strip)
AC_CHECK_TOOL(TARGET_NM, nm)
AC_CHECK_TOOL(TARGET_RANLIB, ranlib)
fi
AC_SUBST(HOST_CC)
AC_SUBST(BUILD_CC)
AC_SUBST(BUILD_CFLAGS)
AC_SUBST(BUILD_CPPFLAGS)
AC_SUBST(BUILD_LDFLAGS)
AC_SUBST(TARGET_CC)
AC_SUBST(TARGET_NM)
AC_SUBST(TARGET_RANLIB)
AC_SUBST(TARGET_STRIP)
AC_SUBST(TARGET_OBJCOPY)
# Test the C compiler for the target environment.
tmp_CC="$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="$TARGET_CFLAGS -Wcast-align"
fi
TARGET_CC_VERSION="$(LC_ALL=C $TARGET_CC --version | head -n1)"
AC_CACHE_CHECK([which extra warnings work], [grub_cv_target_cc_w_extra_flags], [
LDFLAGS="$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="$TARGET_CFLAGS -fno-asynchronous-unwind-tables"
fi
AC_ARG_ENABLE([efiemu],
[AS_HELP_STRING([--enable-efiemu],
[build and install the efiemu runtimes (default=guessed)])])
if test x"$enable_efiemu" = xno ; then
efiemu_excuse="explicitly disabled"
fi
if test x"$grub_cv_target_cc_link_format" = x-mi386pe || test x"$grub_cv_target_cc_link_format" = x-mi386pep ; 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 ($efiemu_excuse)])
fi
if test x"$efiemu_excuse" = x ; then
enable_efiemu=yes
else
enable_efiemu=no
fi
AC_SUBST([enable_efiemu])
AC_SUBST([EFIEMU64_LINK_FORMAT])
CFLAGS="$TARGET_CFLAGS"
if test x"$platform" = xemu ; then
TARGET_OBJ2ELF=
grub_cv_target_cc_link_format=
case "$host_os" in
*darwin* | *mac*)
grub_cv_target_cc_link_format="-arch,${target_cpu}"
TARGET_LDFLAGS="$TARGET_LDFLAGS -Wl,$grub_cv_target_cc_link_format"
;;
*windows* | *cygwin* | *mingw*)
if test x${target_cpu} = xi386 ; then
grub_cv_target_cc_link_format=-mi386pe
TARGET_OBJ2ELF='./build-grub-pe2elf$(BUILD_EXEEXT)'
fi
if test x${target_cpu} = xx86_64 ; then
grub_cv_target_cc_link_format=-mi386pep
TARGET_OBJ2ELF='./build-grub-pep2elf$(BUILD_EXEEXT)'
fi
TARGET_LDFLAGS="$TARGET_LDFLAGS -Wl,$grub_cv_target_cc_link_format"
;;
esac
elif 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 -mi386pe -mi386pep -arch,${target_cpu}; do
if test x${target_cpu} != xi386 && test x$format = x-mi386pe; then
continue
fi
if test x${target_cpu} != xx86_64 && test x$format = x-mi386pep; then
continue
fi
CFLAGS="$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$(BUILD_EXEEXT)'
fi
if test x"$grub_cv_target_cc_link_format" = x-mi386pep ; then
TARGET_OBJ2ELF='./build-grub-pep2elf$(BUILD_EXEEXT)'
fi
fi
if test x$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 || test x$grub_cv_target_cc_link_format = x-mi386pep ; then
TARGET_APPLE_LINKER=0
TARGET_LDFLAGS_OLDMAGIC="-Wl,-N"
TARGET_IMG_LDSCRIPT='$(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="$TARGET_CFLAGS -mlong-calls"
fi
AC_CACHE_CHECK([whether option -mthumb-interwork works], grub_cv_cc_mthumb_interwork, [
CFLAGS="$TARGET_CFLAGS -mthumb-interwork -Werror"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
[grub_cv_cc_mthumb_interwork=yes],
[grub_cv_cc_mthumb_interwork=no])
])
if test "x$grub_cv_cc_mthumb_interwork" = xyes; then
TARGET_CFLAGS="$TARGET_CFLAGS -mthumb-interwork"
elif test "x$grub_cv_cc_target_clang" = xno ; then
AC_MSG_ERROR([your compiler doesn't support -mthumb-interwork])
else
CFLAGS="$TARGET_CFLAGS"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[
#if defined (__thumb__) && !defined (__thumb2__)
#error thumb without interworking
#endif
]])],
[no_interwork_ok=yes],
[no_interwork_ok=no])
if test x$no_interwork_ok = xno ; then
AC_MSG_ERROR([attempt to compile to thumb with no thumb interwork])
fi
fi
fi
AC_CACHE_CHECK([whether option -Qn works], grub_cv_target_cc_qn, [
CFLAGS="$TARGET_CFLAGS -Qn -Werror"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
[grub_cv_target_cc_qn=yes],
[grub_cv_target_cc_qn=no])])
if test "x$grub_cv_target_cc_qn" = xyes; then
TARGET_CFLAGS="$TARGET_CFLAGS -Qn"
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])