1 # Process this file with autoconf to produce a configure script.
3 # Copyright (C) 2002,2003,2004,2005,2006,2007,2008,2009 Free Software Foundation, Inc.
5 # This configure.ac is free software; the author
6 # gives unlimited permission to copy and/or distribute it,
7 # with or without modifications, as long as this notice is preserved.
9 # This program is distributed in the hope that it will be useful,
10 # but WITHOUT ANY WARRANTY, to the extent permitted by law; without
11 # even the implied warranty of MERCHANTABILITY or FITNESS FOR A
14 dnl This configure script is complicated, because GRUB needs to deal
15 dnl with three potentially different types:
17 dnl build -- the environment for building GRUB
18 dnl host -- the environment for running utilities
19 dnl target -- the environment for running GRUB
21 dnl In addition, GRUB needs to deal with a platform specification
22 dnl which specifies the system running GRUB, such as firmware.
23 dnl This is necessary because the target type in autoconf does not
24 dnl describe such a system very well.
26 dnl The current strategy is to use variables with no prefix (such as
27 dnl CC, CFLAGS, etc.) for the host type as well as the build type,
28 dnl because GRUB does not need to use those variables for the build
29 dnl type, so there is no conflict. Variables with the prefix "TARGET_"
30 dnl (such as TARGET_CC, TARGET_CFLAGS, etc.) are used for the target
34 AC_INIT([GRUB],[1.96],[bug-grub@gnu.org])
36 AC_CONFIG_SRCDIR([include/grub/dl.h])
37 AC_CONFIG_HEADER([config.h])
39 # Checks for host and target systems.
43 # Program name transformations
47 powerpc64) host_m32=1 ;;
51 i[[3456]]86) target_cpu=i386 ;;
54 # Specify the platform (such as firmware).
55 AC_ARG_WITH([platform],
56 AS_HELP_STRING([--with-platform=PLATFORM],
57 [select the host platform [[guessed]]]))
59 # Guess the platform if not specified.
60 if test "x$with_platform" = x; then
61 case "$target_cpu"-"$target_vendor" in
62 i386-apple) platform=efi ;;
63 i386-*) platform=pc ;;
64 x86_64-apple) platform=efi ;;
65 x86_64-*) platform=pc ;;
66 powerpc-*) platform=ieee1275 ;;
67 powerpc64-*) platform=ieee1275 ;;
68 sparc64-*) platform=ieee1275 ;;
69 *) AC_MSG_ERROR([unsupported CPU: "$target_cpu"]) ;;
72 platform="$with_platform"
75 # Adjust CPU unless target was explicitly specified.
76 if test -z "$target_alias"; then
77 case "$target_cpu"-"$platform" in
79 x86_64-*) target_cpu=i386 ;;
80 powerpc64-ieee1275) target_cpu=powerpc ;;
84 # Check if the platform is supported, make final adjustments.
85 case "$target_cpu"-"$platform" in
90 i386-linuxbios) platform=coreboot ;;
94 *) AC_MSG_ERROR([platform "$platform" is not supported for target CPU "$target_cpu"]) ;;
98 i386 | powerpc) target_m32=1 ;;
99 x86_64 | sparc64) target_m64=1 ;;
103 mingw32) host_os=cygwin ;;
106 # This normalizes the names, and creates a new variable ("host_kernel")
107 # while at it, since the mapping is not always 1:1 (e.g. different OSes
108 # using the same kernel type).
110 gnu*) host_kernel=hurd ;;
111 linux*) host_kernel=linux ;;
112 freebsd* | kfreebsd*-gnu) host_kernel=freebsd ;;
113 cygwin) host_kernel=windows ;;
118 AC_SUBST(host_kernel)
124 # Checks for build programs.
127 # Although cmp is listed in the GNU Coding Standards as a command which
128 # can used directly, OpenBSD lacks cmp in the default installation.
129 AC_CHECK_PROGS([CMP], [cmp])
130 if test "x$CMP" = x; then
131 AC_MSG_ERROR([cmp is not found])
134 AC_CHECK_PROGS([YACC], [bison])
135 if test "x$YACC" = x; then
136 AC_MSG_ERROR([bison is not found])
139 for file in /usr/src/unifont.bdf ; do
140 if test -e $file ; then
141 AC_SUBST([UNIFONT_BDF], [$file])
150 # These are not a "must".
151 AC_PATH_PROG(RUBY, ruby)
152 AC_PATH_PROG(HELP2MAN, help2man)
155 # Checks for host programs.
160 test "x$GCC" = xyes || AC_MSG_ERROR([GCC is required])
165 # Identify characteristics of the host architecture.
167 AC_CHECK_SIZEOF(void *)
168 AC_CHECK_SIZEOF(long)
170 if test "x$host_m32" = x1; then
172 CFLAGS="$CFLAGS -m32"
173 LDFLAGS="$LDFLAGS -m32"
176 # Check LZO when compiling for the i386-pc.
177 if test "$target_cpu"-"$platform" = i386-pc; then
179 [AS_HELP_STRING([--enable-lzo],
180 [use lzo to compress kernel (default is lzma)])])
181 [if [ x"$enable_lzo" = xyes ]; then
182 # There are three possibilities. LZO version 2 installed with the name
183 # liblzo2, with the name liblzo, and LZO version 1.]
184 AC_DEFINE([ENABLE_LZO], [1], [Use lzo compression])
185 AC_CHECK_LIB([lzo2], [__lzo_init_v2], [LIBLZO="-llzo2"],
186 [AC_CHECK_LIB([lzo], [__lzo_init_v2], [LIBLZO="-llzo"],
187 [AC_CHECK_LIB([lzo], [__lzo_init2], [LIBLZO="-llzo"],
188 [AC_MSG_ERROR([LZO library version 1.02 or later is required])])])])
190 [LIBS="$LIBS $LIBLZO"]
191 AC_CHECK_FUNC([lzo1x_999_compress], ,
192 [AC_MSG_ERROR([LZO1X-999 must be enabled])])
194 [# LZO version 2 uses lzo/lzo1x.h, while LZO version 1 uses lzo1x.h.]
195 AC_CHECK_HEADERS([lzo/lzo1x.h lzo1x.h])
197 AC_DEFINE([ENABLE_LZMA], [1], [Use lzma compression])
199 AC_SUBST([enable_lzo])
202 # Check for functions.
203 AC_CHECK_FUNCS(posix_memalign memalign asprintf)
206 # Check for target programs.
210 # Use linker script if present, otherwise use builtin -N script.
211 AC_MSG_CHECKING([for option to link raw image])
212 if test -f "${srcdir}/conf/${target_cpu}-${platform}-${host_os}-img-ld.sc"; then
213 TARGET_IMG_LDSCRIPT='$(top_srcdir)'"/conf/${target_cpu}-${platform}-${host_os}-img-ld.sc"
214 TARGET_IMG_LDFLAGS="-Wl,-T${TARGET_IMG_LDSCRIPT}"
215 TARGET_IMG_LDFLAGS_AC="-Wl,-T${srcdir}/conf/${target_cpu}-${platform}-${host_os}-img-ld.sc"
218 TARGET_IMG_LDFLAGS='-Wl,-N'
219 TARGET_IMG_LDFLAGS_AC='-Wl,-N'
221 AC_SUBST(TARGET_IMG_LDSCRIPT)
222 AC_SUBST(TARGET_IMG_LDFLAGS)
223 AC_MSG_RESULT([$TARGET_IMG_LDFLAGS_AC])
225 # For platforms where ELF is not the default link format.
226 AC_MSG_CHECKING([for command to convert module to ELF format])
228 cygwin) TARGET_OBJ2ELF='grub-pe2elf' ;;
231 AC_SUBST(TARGET_OBJ2ELF)
232 AC_MSG_RESULT([$TARGET_OBJ2ELF])
234 # For cross-compiling.
235 if test "x$build" != "x$host"; then
236 # XXX this depends on the implementation of autoconf!
237 tmp_ac_tool_prefix="$ac_tool_prefix"
238 ac_tool_prefix=$target_alias-
240 AC_CHECK_TOOLS(TARGET_CC, [gcc egcs cc],
241 [AC_MSG_ERROR([none of gcc, egcs and cc is found. set TARGET_CC manually.])])
242 AC_CHECK_TOOL(OBJCOPY, objcopy)
243 AC_CHECK_TOOL(STRIP, strip)
244 AC_CHECK_TOOL(NM, nm)
246 ac_tool_prefix="$tmp_ac_tool_prefix"
248 if test "x$TARGET_CC" = x; then
251 AC_CHECK_TOOL(OBJCOPY, objcopy)
252 AC_CHECK_TOOL(STRIP, strip)
253 AC_CHECK_TOOL(NM, nm)
258 # Test the C compiler for the target environment.
261 tmp_LDFLAGS="$LDFLAGS"
262 tmp_CPPFLAGS="$CPPFLAGS"
265 CFLAGS="$TARGET_CFLAGS"
266 CPPFLAGS="$TARGET_CPPFLAGS"
267 LDFLAGS="$TARGET_LDFLAGS"
270 if test "x$TARGET_CFLAGS" = x; then
272 TARGET_CFLAGS="-Wall -W -Wshadow -Wpointer-arith -Wmissing-prototypes \
273 -Wundef -Wstrict-prototypes -g"
275 # optimization flags.
276 AC_CACHE_CHECK([whether optimization for size works], grub_cv_cc_Os, [
278 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
282 if test "x$grub_cv_cc_Os" = xyes; then
283 TARGET_CFLAGS="$TARGET_CFLAGS -Os"
285 TARGET_CFLAGS="$TARGET_CFLAGS -O2 -fno-strength-reduce -fno-unroll-loops"
288 # Force no alignment to save space on i386.
289 if test "x$target_cpu" = xi386; then
290 AC_CACHE_CHECK([whether -falign-loops works], [grub_cv_cc_falign_loop], [
291 CFLAGS="-falign-loops=1"
292 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
293 [grub_cv_cc_falign_loop=yes],
294 [grub_cv_cc_falign_loop=no])
297 if test "x$grub_cv_cc_falign_loop" = xyes; then
298 TARGET_CFLAGS="$TARGET_CFLAGS -falign-jumps=1 -falign-loops=1 -falign-functions=1"
300 TARGET_CFLAGS="$TARGET_CFLAGS -malign-jumps=1 -malign-loops=1 -malign-functions=1"
305 if test "x$target_m32" = x1; then
307 TARGET_CFLAGS="$TARGET_CFLAGS -m32"
308 TARGET_LDFLAGS="$TARGET_LDFLAGS -m32"
311 if test "x$target_m64" = x1; then
313 TARGET_CFLAGS="$TARGET_CFLAGS -m64"
314 TARGET_LDFLAGS="$TARGET_LDFLAGS -m64"
317 if test "$target_cpu"-"$platform" = x86_64-efi; then
318 # Use large model to support 4G memory
319 AC_CACHE_CHECK([whether option -mcmodel=large works], grub_cv_cc_mcmodel, [
320 CFLAGS="-m64 -mcmodel=large"
321 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
322 [grub_cv_cc_mcmodel=yes],
323 [grub_cv_cc_mcmodel=no])
325 if test "x$grub_cv_cc_no_mcmodel" = xno; then
326 AC_MSG_ERROR([-mcmodel=large not supported, upgrade your gcc])
329 # EFI writes to stack below %rsp, we must not use the red zone
330 AC_CACHE_CHECK([whether option -mno-red-zone works], grub_cv_cc_no_red_zone, [
331 CFLAGS="-m64 -mno-red-zone"
332 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
333 [grub_cv_cc_no_red_zone=yes],
334 [grub_cv_cc_no_red_zone=no])
336 if test "x$grub_cv_cc_no_red_zone" = xno; then
337 AC_MSG_ERROR([-mno-red-zone not supported, upgrade your gcc])
340 TARGET_CFLAGS="$TARGET_CFLAGS -mcmodel=large -mno-red-zone"
347 # Need __enable_execute_stack() for nested function trampolines?
348 grub_CHECK_ENABLE_EXECUTE_STACK
350 # Smashing stack protector.
351 grub_CHECK_STACK_PROTECTOR
352 # Need that, because some distributions ship compilers that include
353 # `-fstack-protector' in the default specs.
354 if test "x$ssp_possible" = xyes; then
355 TARGET_CFLAGS="$TARGET_CFLAGS -fno-stack-protector"
357 grub_CHECK_STACK_ARG_PROBE
358 # Cygwin's GCC uses alloca() to probe the stackframe on static
359 # stack allocations above some threshold.
360 if test x"$sap_possible" = xyes; then
361 TARGET_CFLAGS="$TARGET_CFLAGS -mno-stack-arg-probe"
364 AC_SUBST(TARGET_CFLAGS)
365 AC_SUBST(TARGET_CPPFLAGS)
366 AC_SUBST(TARGET_LDFLAGS)
367 AC_SUBST(MODULE_LDFLAGS)
369 # Set them to their new values for the tests below.
371 CFLAGS="$TARGET_CFLAGS"
372 CPPFLAGS="$TARGET_CPPFLAGS"
373 LDFLAGS="$TARGET_LDFLAGS"
375 # Defined in aclocal.m4.
377 grub_PROG_OBJCOPY_ABSOLUTE
378 grub_PROG_LD_BUILD_ID_NONE
380 if test "x$target_cpu" = xi386; then
381 if test ! -z "$TARGET_IMG_LDSCRIPT"; then
382 # Check symbols provided by linker script.
383 CFLAGS="$TARGET_CFLAGS -nostdlib $TARGET_IMG_LDFLAGS_AC -Wl,-Ttext,8000,--defsym,___main=0x8100"
385 if test "x$platform" = xpc; then
386 grub_CHECK_BSS_START_SYMBOL
387 grub_CHECK_END_SYMBOL
389 CFLAGS="$TARGET_CFLAGS"
390 grub_I386_ASM_PREFIX_REQUIREMENT
392 grub_I386_ASM_ABSOLUTE_WITHOUT_ASTERISK
393 grub_I386_CHECK_REGPARM_BUG
395 AC_DEFINE([NESTED_FUNC_ATTR], [], [Catch gcc bug])
401 CPPFLAGS="$tmp_CPPFLAGS"
402 LDFLAGS="$tmp_LDFLAGS"
409 # Memory manager debugging.
410 AC_ARG_ENABLE([mm-debug],
411 AS_HELP_STRING([--enable-mm-debug],
412 [include memory manager debugging]),
413 [AC_DEFINE([MM_DEBUG], [1],
414 [Define to 1 if you enable memory manager debugging.])])
416 AC_ARG_ENABLE([grub-emu],
417 [AS_HELP_STRING([--enable-grub-emu],
418 [build and install the `grub-emu' debugging utility])])
419 AC_ARG_ENABLE([grub-emu-usb],
420 [AS_HELP_STRING([--enable-grub-emu-usb],
421 [build and install the `grub-emu' debugging utility with USB support])])
422 [if [ x"$enable_grub_emu" = xyes ]; then
423 # Check for curses libraries.]
424 AC_CHECK_LIB([ncurses], [wgetch], [LIBCURSES="-lncurses"],
425 [AC_CHECK_LIB([curses], [wgetch], [LIBCURSES="-lcurses"],
426 [AC_MSG_ERROR([(n)curses libraries are required to build `grub-emu'])])])
427 AC_SUBST([LIBCURSES])
429 [# Check for headers.]
430 AC_CHECK_HEADERS([ncurses/curses.h], [],
431 [AC_CHECK_HEADERS([ncurses.h], [],
432 [AC_CHECK_HEADERS([curses.h], [],
433 [AC_MSG_ERROR([(n)curses header files are required to build `grub-emu'])])])])
435 [if [ x"$enable_grub_emu_usb" = xyes ]; then
436 # Check for libusb libraries.]
437 AC_CHECK_LIB([usb], [usb_claim_interface], [LIBUSB="-lusb"],
438 [AC_MSG_ERROR([libusb libraries are required to build `grub-emu' with USB support])])
441 [# Check for headers.]
442 AC_CHECK_HEADERS([usb.h], [],
443 [AC_MSG_ERROR([libusb header file is required to build `grub-emu' with USB support])])
446 AC_SUBST([enable_grub_emu])
447 AC_SUBST([enable_grub_emu_usb])
449 AC_ARG_ENABLE([grub-fstest],
450 [AS_HELP_STRING([--enable-grub-fstest],
451 [build and install the `grub-fstest' debugging utility])])
452 AC_SUBST([enable_grub_fstest])
454 AC_ARG_ENABLE([grub-pe2elf],
455 [AS_HELP_STRING([--enable-grub-pe2elf],
456 [build and install the `grub-pe2elf' conversion utility])])
457 AC_SUBST([enable_grub_pe2elf])
459 AC_ARG_ENABLE([grub-mkfont],
460 [AS_HELP_STRING([--enable-grub-mkfont],
461 [build and install the `grub-mkfont' utility])])
462 if test x"$enable_grub_mkfont" = xyes ; then
463 # Check for freetype libraries.
464 AC_CHECK_PROGS([FREETYPE], [freetype-config])
465 if test "x$FREETYPE" = x ; then
466 AC_MSG_ERROR([freetype2 libraries are required to build `grub-mkfont'])
468 freetype_cflags=`freetype-config --cflags`
469 freetype_libs=`freetype-config --libs`
471 AC_SUBST([enable_grub_mkfont])
472 AC_SUBST([freetype_cflags])
473 AC_SUBST([freetype_libs])
477 if test x"$link_dir" = xyes ; then
478 AC_CONFIG_LINKS([include/grub/cpu:include/grub/$target_cpu
479 include/grub/machine:include/grub/$target_cpu/$platform])
481 mkdir -p include/grub 2>/dev/null
482 rm -rf include/grub/cpu
483 cp -rp $srcdir/include/grub/$target_cpu include/grub/cpu 2>/dev/null
484 rm -rf include/grub/machine
485 cp -rp $srcdir/include/grub/$target_cpu/$platform include/grub/machine 2>/dev/null
487 AC_CONFIG_FILES([Makefile gensymlist.sh genkernsyms.sh])
488 AC_CONFIG_FILES([stamp-h], [echo timestamp > stamp-h])