gdb: add target_ops::supports_displaced_step
[deliverable/binutils-gdb.git] / ld / configure.ac
1 dnl Process this file with autoconf to produce a configure script
2 dnl
3 dnl Copyright (C) 2012-2020 Free Software Foundation, Inc.
4 dnl
5 dnl This file is free software; you can redistribute it and/or modify
6 dnl it under the terms of the GNU General Public License as published by
7 dnl the Free Software Foundation; either version 3 of the License, or
8 dnl (at your option) any later version.
9 dnl
10 dnl This program is distributed in the hope that it will be useful,
11 dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
12 dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 dnl GNU General Public License for more details.
14 dnl
15 dnl You should have received a copy of the GNU General Public License
16 dnl along with this program; see the file COPYING3. If not see
17 dnl <http://www.gnu.org/licenses/>.
18 dnl
19
20 m4_include([../bfd/version.m4])
21 AC_INIT([ld], BFD_VERSION)
22 AC_CONFIG_SRCDIR(ldmain.c)
23
24 AC_CANONICAL_TARGET
25 AC_CANONICAL_BUILD
26 AC_ISC_POSIX
27
28 AM_INIT_AUTOMAKE
29 AM_MAINTAINER_MODE
30
31 AC_PROG_CC
32 AC_PROG_CXX
33 AC_PROG_GREP
34 AC_GNU_SOURCE
35 AC_USE_SYSTEM_EXTENSIONS
36 AC_PROG_INSTALL
37
38 LT_INIT
39 ACX_LARGEFILE
40
41 AC_ARG_WITH(lib-path, [ --with-lib-path=dir1:dir2... set default LIB_PATH],LIB_PATH=$withval)
42 AC_ARG_ENABLE(targets,
43 [ --enable-targets alternative target configurations],
44 [case "${enableval}" in
45 yes | "") AC_MSG_ERROR(enable-targets option must specify target names or 'all')
46 ;;
47 no) enable_targets= ;;
48 *) enable_targets=$enableval ;;
49 esac])dnl
50 AC_ARG_ENABLE(64-bit-bfd,
51 [ --enable-64-bit-bfd 64-bit support (on hosts with narrower word sizes)],
52 [case "${enableval}" in
53 yes) want64=true ;;
54 no) want64=false ;;
55 *) AC_MSG_ERROR(bad value ${enableval} for 64-bit-bfd option) ;;
56 esac],[want64=false])dnl
57
58 AC_ARG_WITH(sysroot,
59 [ --with-sysroot[=DIR] Search for usr/lib et al within DIR.],
60 [
61 case ${with_sysroot} in
62 yes) TARGET_SYSTEM_ROOT='${exec_prefix}/${target_alias}/sys-root' ;;
63 *) TARGET_SYSTEM_ROOT=$with_sysroot ;;
64 esac
65
66 TARGET_SYSTEM_ROOT_DEFINE='-DTARGET_SYSTEM_ROOT=\"$(TARGET_SYSTEM_ROOT)\"'
67 use_sysroot=yes
68
69 if test "x$prefix" = xNONE; then
70 test_prefix=/usr/local
71 else
72 test_prefix=$prefix
73 fi
74 if test "x$exec_prefix" = xNONE; then
75 test_exec_prefix=$test_prefix
76 else
77 test_exec_prefix=$exec_prefix
78 fi
79 case ${TARGET_SYSTEM_ROOT} in
80 "${test_prefix}"|"${test_prefix}/"*|\
81 "${test_exec_prefix}"|"${test_exec_prefix}/"*|\
82 '${prefix}'|'${prefix}/'*|\
83 '${exec_prefix}'|'${exec_prefix}/'*)
84 t="$TARGET_SYSTEM_ROOT_DEFINE -DTARGET_SYSTEM_ROOT_RELOCATABLE"
85 TARGET_SYSTEM_ROOT_DEFINE="$t"
86 ;;
87 esac
88 ], [
89 use_sysroot=no
90 TARGET_SYSTEM_ROOT=
91 TARGET_SYSTEM_ROOT_DEFINE='-DTARGET_SYSTEM_ROOT=\"\"'
92 ])
93 AC_SUBST(use_sysroot)
94 AC_SUBST(TARGET_SYSTEM_ROOT)
95 AC_SUBST(TARGET_SYSTEM_ROOT_DEFINE)
96
97 dnl Use --enable-gold to decide if this linker should be the default.
98 dnl "install_as_default" is set to false if gold is the default linker.
99 dnl "installed_linker" is the installed BFD linker name.
100 AC_ARG_ENABLE(gold,
101 [[ --enable-gold[=ARG] build gold [ARG={default,yes,no}]]],
102 [case "${enableval}" in
103 default)
104 install_as_default=no
105 installed_linker=ld.bfd
106 ;;
107 yes|no)
108 install_as_default=yes
109 installed_linker=ld.bfd
110 ;;
111 *)
112 AC_MSG_ERROR([invalid --enable-gold argument])
113 ;;
114 esac],
115 [install_as_default=yes
116 installed_linker=ld.bfd])
117 AC_SUBST(install_as_default)
118 AC_SUBST(installed_linker)
119
120 AC_ARG_ENABLE([got],
121 AS_HELP_STRING([--enable-got=<type>],
122 [GOT handling scheme (target, single, negative, multigot)]),
123 [case "${enableval}" in
124 target | single | negative | multigot) got_handling=$enableval ;;
125 *) AC_MSG_ERROR(bad value ${enableval} for --enable-got option) ;;
126 esac],
127 [got_handling=target])
128
129 case "${got_handling}" in
130 target)
131 AC_DEFINE([GOT_HANDLING_DEFAULT], [GOT_HANDLING_TARGET_DEFAULT],
132 [Define to choose default GOT handling scheme]) ;;
133 single)
134 AC_DEFINE([GOT_HANDLING_DEFAULT], [GOT_HANDLING_SINGLE],
135 [Define to choose default GOT handling scheme]) ;;
136 negative)
137 AC_DEFINE([GOT_HANDLING_DEFAULT], [GOT_HANDLING_NEGATIVE],
138 [Define to choose default GOT handling scheme]) ;;
139 multigot)
140 AC_DEFINE([GOT_HANDLING_DEFAULT], [GOT_HANDLING_MULTIGOT],
141 [Define to choose default GOT handling scheme]) ;;
142 *) AC_MSG_ERROR(bad value ${got_handling} for --enable-got option) ;;
143 esac
144
145 # PR gas/19109
146 # Decide the default method for compressing debug sections.
147 ac_default_compressed_debug_sections=unset
148 # Provide a configure time option to override our default.
149 AC_ARG_ENABLE(compressed_debug_sections,
150 AS_HELP_STRING([--enable-compressed-debug-sections={all,ld,none}],
151 [compress debug sections by default])],
152 [case ,"${enableval}", in
153 ,yes, | ,all, | *,ld,*) ac_default_compressed_debug_sections=yes ;;
154 ,no, | ,none,) ac_default_compressed_debug_sections=no ;;
155 esac])dnl
156
157 # Decide setting DT_RUNPATH instead of DT_RPATH by default
158 ac_default_new_dtags=unset
159 # Provide a configure time option to override our default.
160 AC_ARG_ENABLE(new_dtags,
161 AS_HELP_STRING([--enable-new-dtags],
162 [set DT_RUNPATH instead of DT_RPATH by default])],
163 [case "${enableval}" in
164 yes) ac_default_new_dtags=1 ;;
165 no) ac_default_new_dtags=0 ;;
166 esac])dnl
167
168 # Decide if -z relro should be enabled in ELF linker by default.
169 ac_default_ld_z_relro=unset
170 # Provide a configure time option to override our default.
171 AC_ARG_ENABLE(relro,
172 AS_HELP_STRING([--enable-relro],
173 [enable -z relro in ELF linker by default]),
174 [case "${enableval}" in
175 yes) ac_default_ld_z_relro=1 ;;
176 no) ac_default_ld_z_relro=0 ;;
177 esac])dnl
178
179 # Decide if DT_TEXTREL check should be enabled in ELF linker.
180 ac_default_ld_textrel_check=unset
181 AC_ARG_ENABLE([textrel-check],
182 AC_HELP_STRING([--enable-textrel-check=@<:@yes|no|warning|error@:>@],
183 [enable DT_TEXTREL check in ELF linker]),
184 [case "${enableval}" in
185 yes|no|warning|error) ac_default_ld_textrel_check=${enableval} ;;
186 esac])
187
188 # Decide if -z separate-code should be enabled in ELF linker by default.
189 ac_default_ld_z_separate_code=unset
190 AC_ARG_ENABLE(separate-code,
191 AS_HELP_STRING([--enable-separate-code],
192 [enable -z separate-code in ELF linker by default]),
193 [case "${enableval}" in
194 yes) ac_default_ld_z_separate_code=1 ;;
195 no) ac_default_ld_z_separate_code=0 ;;
196 esac])
197
198 # Decide which "--hash-style" to use by default
199 # Provide a configure time option to override our default.
200 AC_ARG_ENABLE([default-hash-style],
201 AS_HELP_STRING([--enable-default-hash-style={sysv,gnu,both}],
202 [use this default hash style]),
203 [case "${enable_default_hash_style}" in
204 sysv | gnu | both) ;;
205 *) AC_MSG_ERROR([bad value ${enable_default_hash_style} for enable-default-hash-style option]) ;;
206 esac],
207 [case "${target}" in
208 # Enable gnu hash only on GNU targets, but not mips
209 mips*-*-*) enable_default_hash_style=sysv ;;
210 *-*-gnu* | *-*-linux* | *-*-nacl*) enable_default_hash_style=both ;;
211 *) enable_default_hash_style=sysv ;;
212 esac])
213
214 case "${enable_default_hash_style}" in
215 sysv | both) ac_default_emit_sysv_hash=1 ;;
216 *) ac_default_emit_sysv_hash=0 ;;
217 esac
218
219 case "${enable_default_hash_style}" in
220 gnu | both) ac_default_emit_gnu_hash=1 ;;
221 *) ac_default_emit_gnu_hash=0 ;;
222 esac
223
224 AM_BINUTILS_WARNINGS
225
226 AM_LC_MESSAGES
227
228 AC_CONFIG_HEADERS([config.h:config.in])
229
230 # PR 14072
231 AH_VERBATIM([00_CONFIG_H_CHECK],
232 [/* Check that config.h is #included before system headers
233 (this works only for glibc, but that should be enough). */
234 #if defined(__GLIBC__) && !defined(__FreeBSD_kernel__) && !defined(__CONFIG_H__)
235 # error config.h must be #included before system headers
236 #endif
237 #define __CONFIG_H__ 1])
238
239 if test -z "$target" ; then
240 AC_MSG_ERROR(Unrecognized target system type; please check config.sub.)
241 fi
242 if test -z "$host" ; then
243 AC_MSG_ERROR(Unrecognized host system type; please check config.sub.)
244 fi
245
246 # host-specific stuff:
247
248 ALL_LINGUAS="bg da de es fi fr ga id it ja pt_BR ru sr sv tr uk vi zh_CN zh_TW"
249 ZW_GNU_GETTEXT_SISTER_DIR
250 AM_PO_SUBDIRS
251
252 AC_EXEEXT
253
254 AC_PROG_YACC
255 AM_PROG_LEX
256
257 AM_MAINTAINER_MODE
258 AM_CONDITIONAL(GENINSRC_NEVER, false)
259 ACX_PROG_CMP_IGNORE_INITIAL
260
261 . ${srcdir}/configure.host
262
263 AC_SUBST(HDEFINES)
264 AC_SUBST(NATIVE_LIB_DIRS)
265
266 AC_CHECK_HEADERS(string.h strings.h stdlib.h unistd.h elf-hints.h limits.h locale.h sys/param.h)
267 AC_CHECK_HEADERS(fcntl.h sys/file.h sys/time.h sys/stat.h)
268 ACX_HEADER_STRING
269 AC_CHECK_FUNCS(glob mkstemp realpath sbrk setlocale waitpid)
270 AC_CHECK_FUNCS(open lseek close)
271 AC_HEADER_DIRENT
272
273 dnl AC_CHECK_HEADERS(sys/mman.h)
274 AC_FUNC_MMAP
275
276 AC_SEARCH_LIBS([dlopen], [dl])
277 AM_CONDITIONAL([ENABLE_PLUGINS], [test x$plugins = xyes])
278
279 AC_ARG_ENABLE(initfini-array,
280 [ --disable-initfini-array do not use .init_array/.fini_array sections],
281 [case "${enableval}" in
282 yes|no) ;;
283 *) AC_MSG_ERROR([invalid --enable-initfini-array argument]) ;;
284 esac], [enable_initfini_array=yes])
285 AC_SUBST(enable_initfini_array)
286 if test $enable_initfini_array = yes; then
287 AC_DEFINE(HAVE_INITFINI_ARRAY, 1,
288 [Define .init_array/.fini_array sections are available and working.])
289 fi
290
291 AC_MSG_CHECKING(for a known getopt prototype in unistd.h)
292 AC_CACHE_VAL(ld_cv_decl_getopt_unistd_h,
293 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <unistd.h>], [extern int getopt (int, char *const*, const char *);])],
294 ld_cv_decl_getopt_unistd_h=yes, ld_cv_decl_getopt_unistd_h=no)])
295 AC_MSG_RESULT($ld_cv_decl_getopt_unistd_h)
296 if test $ld_cv_decl_getopt_unistd_h = yes; then
297 AC_DEFINE([HAVE_DECL_GETOPT], 1,
298 [Is the prototype for getopt in <unistd.h> in the expected format?])
299 fi
300
301 BFD_BINARY_FOPEN
302
303 AC_CHECK_DECLS([strstr, free, sbrk, getenv, environ])
304
305 # Link in zlib if we can. This allows us to read and write
306 # compressed CTF sections.
307 AM_ZLIB
308
309 # When converting linker scripts into strings for use in emulation
310 # files, use astring.sed if the compiler supports ANSI string
311 # concatenation, or ostring.sed otherwise. This is to support the
312 # broken Microsoft MSVC compiler, which limits the length of string
313 # constants, while still supporting pre-ANSI compilers which do not
314 # support string concatenation.
315 AC_MSG_CHECKING([whether ANSI C string concatenation works])
316 AC_CACHE_VAL(ld_cv_string_concatenation,
317 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [char *a = "a" "a";])],
318 ld_cv_string_concatenation=yes,
319 ld_cv_string_concatenation=no)])
320 AC_MSG_RESULT($ld_cv_string_concatenation)
321 if test "$ld_cv_string_concatenation" = "yes"; then
322 STRINGIFY=astring.sed
323 else
324 STRINGIFY=ostring.sed
325 fi
326 AC_SUBST(STRINGIFY)
327
328 # target-specific stuff:
329
330 all_targets=
331 EMUL=
332 all_emuls=
333 all_emul_extras=
334 all_libpath=
335 TDIRS=
336
337 # If the host is 64-bit, then we enable 64-bit targets by default.
338 # This is consistent with what ../bfd/configure.ac does.
339 if test x${want64} = xfalse; then
340 AC_CHECK_SIZEOF(void *)
341 if test "x${ac_cv_sizeof_void_p}" = "x8"; then
342 want64=true
343 fi
344 fi
345
346 elf_list_options=FALSE
347 elf_shlib_list_options=FALSE
348 elf_plt_unwind_list_options=FALSE
349 for targ_alias in `echo $target_alias $enable_targets | sed 's/,/ /g'`
350 do
351 if test "$targ_alias" = "all"; then
352 all_targets=true
353 elf_list_options=TRUE
354 elf_shlib_list_options=TRUE
355 elf_plt_unwind_list_options=TRUE
356 else
357 # Canonicalize the secondary target names.
358 result=`$ac_config_sub $targ_alias 2>/dev/null`
359 if test -n "$result"; then
360 targ=$result
361 else
362 targ=$targ_alias
363 fi
364
365 . ${srcdir}/configure.tgt
366
367 if test "$targ" = "$target"; then
368 EMUL=$targ_emul
369 fi
370
371 if test x${want64} = xfalse; then
372 . ${srcdir}/../bfd/config.bfd
373 fi
374
375 if test x${want64} = xtrue; then
376 targ_extra_emuls="$targ_extra_emuls $targ64_extra_emuls"
377 targ_extra_libpath="$targ_extra_libpath $targ64_extra_libpath"
378 fi
379
380 for i in $targ_emul $targ_extra_emuls $targ_extra_libpath; do
381 case " $all_emuls " in
382 *" e${i}.o "*) ;;
383 *)
384 all_emuls="$all_emuls e${i}.o"
385 eval result=\$tdir_$i
386 test -z "$result" && result=$targ_alias
387 TDIRS="$TDIRS
388 tdir_$i=$result"
389 case "${i}" in
390 *elf*)
391 elf_list_options=TRUE
392 ;;
393 *)
394 if $GREP "TEMPLATE_NAME=elf" ${srcdir}/emulparams/${i}.sh >/dev/null 2>/dev/null; then
395 elf_list_options=TRUE
396 fi
397 ;;
398 esac
399 if test "$elf_list_options" = "TRUE"; then
400 source_sh()
401 {
402 . $1
403 }
404 source_sh ${srcdir}/emulparams/${i}.sh
405 if test x${GENERATE_SHLIB_SCRIPT} = xyes; then
406 elf_shlib_list_options=TRUE
407 fi
408 if test x${PLT_UNWIND} = xyes; then
409 elf_plt_unwind_list_options=TRUE
410 fi
411 fi
412 ;;
413 esac
414 done
415
416 for i in $targ_emul $targ_extra_libpath; do
417 case " $all_libpath " in
418 *" ${i} "*) ;;
419 *)
420 if test -z "$all_libpath"; then
421 all_libpath=${i}
422 else
423 all_libpath="$all_libpath ${i}"
424 fi
425 ;;
426 esac
427 done
428
429 for i in $targ_extra_ofiles; do
430 case " $all_emul_extras " in
431 *" ${i} "*) ;;
432 *)
433 all_emul_extras="$all_emul_extras ${i}"
434 ;;
435 esac
436 done
437
438 fi
439 done
440
441 if test x$ac_default_compressed_debug_sections = xyes ; then
442 AC_DEFINE(DEFAULT_FLAG_COMPRESS_DEBUG, 1, [Define if you want compressed debug sections by default.])
443 fi
444
445 if test "${ac_default_new_dtags}" = unset; then
446 ac_default_new_dtags=0
447 fi
448 AC_DEFINE_UNQUOTED(DEFAULT_NEW_DTAGS,
449 $ac_default_new_dtags,
450 [Define to 1 if you want to set DT_RUNPATH instead of DT_RPATH by default.])
451
452 if test "${ac_default_ld_z_relro}" = unset; then
453 ac_default_ld_z_relro=0
454 fi
455 AC_DEFINE_UNQUOTED(DEFAULT_LD_Z_RELRO,
456 $ac_default_ld_z_relro,
457 [Define to 1 if you want to enable -z relro in ELF linker by default.])
458
459 ac_default_ld_textrel_check_warning=0
460 case "${ac_default_ld_textrel_check}" in
461 unset|no)
462 ac_default_ld_textrel_check=textrel_check_none
463 ;;
464 yes|warning)
465 ac_default_ld_textrel_check=textrel_check_warning
466 ac_default_ld_textrel_check_warning=1
467 ;;
468 error)
469 ac_default_ld_textrel_check=textrel_check_error
470 ;;
471 esac
472 AC_DEFINE_UNQUOTED(DEFAULT_LD_TEXTREL_CHECK,
473 $ac_default_ld_textrel_check,
474 [The default method for DT_TEXTREL check in ELF linker.])
475 AC_DEFINE_UNQUOTED(DEFAULT_LD_TEXTREL_CHECK_WARNING,
476 $ac_default_ld_textrel_check_warning,
477 [Define to 1 if DT_TEXTREL check is warning in ELF linker by default.])
478
479 if test "${ac_default_ld_z_separate_code}" = unset; then
480 ac_default_ld_z_separate_code=0
481 fi
482 AC_DEFINE_UNQUOTED(DEFAULT_LD_Z_SEPARATE_CODE,
483 $ac_default_ld_z_separate_code,
484 [Define to 1 if you want to enable -z separate-code in ELF linker by default.])
485
486 AC_DEFINE_UNQUOTED([DEFAULT_EMIT_SYSV_HASH],
487 [$ac_default_emit_sysv_hash],
488 [Define to 1 if you want to emit sysv hash in the ELF linker by default.])
489
490 AC_DEFINE_UNQUOTED([DEFAULT_EMIT_GNU_HASH],
491 [$ac_default_emit_gnu_hash],
492 [Define to 1 if you want to emit gnu hash in the ELF linker by default.])
493
494 AC_SUBST(elf_list_options)
495 AC_SUBST(elf_shlib_list_options)
496 AC_SUBST(elf_plt_unwind_list_options)
497 AC_SUBST(EMUL)
498
499 AC_SUBST(TDIRS)
500 AM_SUBST_NOTMAKE(TDIRS)
501
502 if test x${all_targets} = xtrue; then
503 if test x${want64} = xtrue; then
504 EMULATION_OFILES='$(ALL_EMULATIONS) $(ALL_64_EMULATIONS)'
505 EMUL_EXTRA_OFILES='$(ALL_EMUL_EXTRA_OFILES) $(ALL_64_EMUL_EXTRA_OFILES)'
506 else
507 EMULATION_OFILES='$(ALL_EMULATIONS)'
508 EMUL_EXTRA_OFILES='$(ALL_EMUL_EXTRA_OFILES)'
509 fi
510 else
511 EMULATION_OFILES=$all_emuls
512 EMUL_EXTRA_OFILES=$all_emul_extras
513 fi
514 AC_SUBST(EMULATION_OFILES)
515 AC_SUBST(EMUL_EXTRA_OFILES)
516 AC_SUBST(LIB_PATH)
517
518 EMULATION_LIBPATH=$all_libpath
519 AC_SUBST(EMULATION_LIBPATH)
520
521 if test x${enable_static} = xno; then
522 TESTBFDLIB="-Wl,--rpath,../bfd/.libs ../bfd/.libs/libbfd.so"
523 TESTCTFLIB="-Wl,--rpath,../libctf/.libs ../libctf/.libs/libctf.so"
524 else
525 TESTBFDLIB="../bfd/.libs/libbfd.a"
526 TESTCTFLIB="../libctf/.libs/libctf.a"
527 fi
528 AC_SUBST(TESTBFDLIB)
529 AC_SUBST(TESTCTFLIB)
530
531 target_vendor=${target_vendor=$host_vendor}
532 case "$target_vendor" in
533 hp) EXTRA_SHLIB_EXTENSION=".sl" ;;
534 *) EXTRA_SHLIB_EXTENSION= ;;
535 esac
536
537 case "$target_os" in
538 lynxos) EXTRA_SHLIB_EXTENSION=".a" ;;
539 esac
540
541 if test x${EXTRA_SHLIB_EXTENSION} != x ; then
542 AC_DEFINE_UNQUOTED(EXTRA_SHLIB_EXTENSION, "$EXTRA_SHLIB_EXTENSION",
543 [Additional extension a shared object might have.])
544 fi
545
546 AC_CONFIG_COMMANDS([default],
547 [[
548 case "$srcdir" in
549 .) srcdirpre= ;;
550 *) srcdirpre='$(srcdir)/' ;;
551 esac
552 POFILES=
553 GMOFILES=
554 for lang in dummy $OBSOLETE_ALL_LINGUAS; do
555 if test $lang != dummy; then
556 POFILES="$POFILES $srcdirpre$lang.po"
557 GMOFILES="$GMOFILES $srcdirpre$lang.gmo"
558 fi
559 done
560 sed -e '/^SRC-POTFILES =/r po/SRC-POTFILES' \
561 -e '/^BLD-POTFILES =/r po/BLD-POTFILES' \
562 -e "s,@POFILES@,$POFILES," \
563 -e "s,@GMOFILES@,$GMOFILES," \
564 po/Makefile.in > po/Makefile]],[[]])
565
566 dnl Required by html, pdf, install-pdf and install-html
567 AC_SUBST(datarootdir)
568 AC_SUBST(docdir)
569 AC_SUBST(htmldir)
570 AC_SUBST(pdfdir)
571
572 AC_CONFIG_FILES(Makefile po/Makefile.in:po/Make-in)
573 AC_OUTPUT
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