1 dnl Process this file with autoconf to produce a configure script
3 dnl Copyright (C) 2012-2022 Free Software Foundation, Inc.
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.
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.
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/>.
20 m4_include([../bfd/version.m4])
21 AC_INIT([ld], BFD_VERSION)
22 AC_CONFIG_SRCDIR(ldmain.c)
28 AM_SILENT_RULES([yes])
35 AC_USE_SYSTEM_EXTENSIONS
42 . ${srcdir}/../bfd/development.sh
43 test "$development" = true && ac_checking=yes
44 AC_ARG_ENABLE(checking,
45 [ --enable-checking enable run-time checks],
46 [case "${enableval}" in
47 no|none) ac_checking= ;;
50 if test x$ac_checking != x ; then
51 AC_DEFINE(ENABLE_CHECKING, 1, [Define if you want run-time sanity checks.])
54 AC_ARG_WITH(lib-path, [ --with-lib-path=dir1:dir2... set default LIB_PATH],LIB_PATH=$withval)
55 AC_ARG_ENABLE(targets,
56 [ --enable-targets alternative target configurations],
57 [case "${enableval}" in
58 yes | "") AC_MSG_ERROR(enable-targets option must specify target names or 'all')
60 no) enable_targets= ;;
61 *) enable_targets=$enableval ;;
67 [ --with-sysroot[=DIR] Search for usr/lib et al within DIR.],
69 case ${with_sysroot} in
70 yes) TARGET_SYSTEM_ROOT='${exec_prefix}/${target_alias}/sys-root' ;;
71 *) TARGET_SYSTEM_ROOT=$with_sysroot ;;
74 TARGET_SYSTEM_ROOT_DEFINE='-DTARGET_SYSTEM_ROOT=\"$(TARGET_SYSTEM_ROOT)\"'
77 if test "x$prefix" = xNONE; then
78 test_prefix=/usr/local
82 if test "x$exec_prefix" = xNONE; then
83 test_exec_prefix=$test_prefix
85 test_exec_prefix=$exec_prefix
87 case ${TARGET_SYSTEM_ROOT} in
88 "${test_prefix}"|"${test_prefix}/"*|\
89 "${test_exec_prefix}"|"${test_exec_prefix}/"*|\
90 '${prefix}'|'${prefix}/'*|\
91 '${exec_prefix}'|'${exec_prefix}/'*)
92 t="$TARGET_SYSTEM_ROOT_DEFINE -DTARGET_SYSTEM_ROOT_RELOCATABLE"
93 TARGET_SYSTEM_ROOT_DEFINE="$t"
99 TARGET_SYSTEM_ROOT_DEFINE='-DTARGET_SYSTEM_ROOT=\"\"'
101 AC_SUBST(use_sysroot)
102 AC_SUBST(TARGET_SYSTEM_ROOT)
103 AC_SUBST(TARGET_SYSTEM_ROOT_DEFINE)
105 dnl Use --enable-gold to decide if this linker should be the default.
106 dnl "install_as_default" is set to false if gold is the default linker.
107 dnl "installed_linker" is the installed BFD linker name.
109 [[ --enable-gold[=ARG] build gold [ARG={default,yes,no}]]],
110 [case "${enableval}" in
112 install_as_default=no
113 installed_linker=ld.bfd
116 install_as_default=yes
117 installed_linker=ld.bfd
120 AC_MSG_ERROR([invalid --enable-gold argument])
123 [install_as_default=yes
124 installed_linker=ld.bfd])
125 AC_SUBST(install_as_default)
126 AC_SUBST(installed_linker)
129 AS_HELP_STRING([--enable-got=<type>],
130 [GOT handling scheme (target, single, negative, multigot)]),
131 [case "${enableval}" in
132 target | single | negative | multigot) got_handling=$enableval ;;
133 *) AC_MSG_ERROR(bad value ${enableval} for --enable-got option) ;;
135 [got_handling=target])
137 case "${got_handling}" in
139 AC_DEFINE([GOT_HANDLING_DEFAULT], [GOT_HANDLING_TARGET_DEFAULT],
140 [Define to choose default GOT handling scheme]) ;;
142 AC_DEFINE([GOT_HANDLING_DEFAULT], [GOT_HANDLING_SINGLE],
143 [Define to choose default GOT handling scheme]) ;;
145 AC_DEFINE([GOT_HANDLING_DEFAULT], [GOT_HANDLING_NEGATIVE],
146 [Define to choose default GOT handling scheme]) ;;
148 AC_DEFINE([GOT_HANDLING_DEFAULT], [GOT_HANDLING_MULTIGOT],
149 [Define to choose default GOT handling scheme]) ;;
150 *) AC_MSG_ERROR(bad value ${got_handling} for --enable-got option) ;;
154 # Decide the default method for compressing debug sections.
155 ac_default_compressed_debug_sections=unset
156 # Provide a configure time option to override our default.
157 AC_ARG_ENABLE(compressed_debug_sections,
158 AS_HELP_STRING([--enable-compressed-debug-sections={all,ld,none}],
159 [compress debug sections by default])],
160 [case ,"${enableval}", in
161 ,yes, | ,all, | *,ld,*) ac_default_compressed_debug_sections=yes ;;
162 ,no, | ,none,) ac_default_compressed_debug_sections=no ;;
165 # Decide setting DT_RUNPATH instead of DT_RPATH by default
166 ac_default_new_dtags=unset
167 # Provide a configure time option to override our default.
168 AC_ARG_ENABLE(new_dtags,
169 AS_HELP_STRING([--enable-new-dtags],
170 [set DT_RUNPATH instead of DT_RPATH by default])],
171 [case "${enableval}" in
172 yes) ac_default_new_dtags=1 ;;
173 no) ac_default_new_dtags=0 ;;
176 # Decide if -z relro should be enabled in ELF linker by default.
177 ac_default_ld_z_relro=unset
178 # Provide a configure time option to override our default.
180 AS_HELP_STRING([--enable-relro],
181 [enable -z relro in ELF linker by default]),
182 [case "${enableval}" in
183 yes) ac_default_ld_z_relro=1 ;;
184 no) ac_default_ld_z_relro=0 ;;
187 # Decide if DT_TEXTREL check should be enabled in ELF linker.
188 ac_default_ld_textrel_check=unset
189 AC_ARG_ENABLE([textrel-check],
190 AC_HELP_STRING([--enable-textrel-check=@<:@yes|no|warning|error@:>@],
191 [enable DT_TEXTREL check in ELF linker]),
192 [case "${enableval}" in
193 yes|no|warning|error) ac_default_ld_textrel_check=${enableval} ;;
196 # Decide if -z separate-code should be enabled in ELF linker by default.
197 ac_default_ld_z_separate_code=unset
198 AC_ARG_ENABLE(separate-code,
199 AS_HELP_STRING([--enable-separate-code],
200 [enable -z separate-code in ELF linker by default]),
201 [case "${enableval}" in
202 yes) ac_default_ld_z_separate_code=1 ;;
203 no) ac_default_ld_z_separate_code=0 ;;
207 # By default warn when an executable stack is created due to object files
208 # requesting such, not when the user specifies -z execstack.
209 ac_default_ld_warn_execstack=2
210 AC_ARG_ENABLE(warn-execstack,
211 AS_HELP_STRING([--enable-warn-execstack],
212 [enable warnings when creating an executable stack]),
213 [case "${enableval}" in
214 yes) ac_default_ld_warn_execstack=1 ;;
215 no) ac_default_ld_warn_execstack=0 ;;
218 ac_default_ld_warn_rwx_segments=unset
219 AC_ARG_ENABLE(warn-rwx-segments,
220 AS_HELP_STRING([--enable-warn-rwx-segments],
221 [enable warnings when creating segements with RWX permissions]),
222 [case "${enableval}" in
223 yes) ac_default_ld_warn_rwx_segments=1 ;;
224 no) ac_default_ld_warn_rwx_segments=0 ;;
227 ac_default_ld_default_execstack=unset
228 AC_ARG_ENABLE(default-execstack,
229 AS_HELP_STRING([--enable-default-execstack],
230 [create an executable stack if an input file is missing a .note.GNU-stack section]),
231 [case "${enableval}" in
232 yes) ac_default_ld_default_execstack=1 ;;
233 no) ac_default_ld_default_execstack=0 ;;
237 # Decide if --error-handling-script should be supported.
238 ac_support_error_handling_script=unset
239 AC_ARG_ENABLE(error-handling-script,
240 AS_HELP_STRING([--enable-error-handling-script],
241 [enable/disable support for the --error-handling-script option]),
242 [case "${enableval}" in
243 yes) ac_support_error_handling_script=1 ;;
244 no) ac_support_error_handling_script=0 ;;
247 # Decide which "--hash-style" to use by default
248 # Provide a configure time option to override our default.
249 AC_ARG_ENABLE([default-hash-style],
250 AS_HELP_STRING([--enable-default-hash-style={sysv,gnu,both}],
251 [use this default hash style]),
252 [case "${enable_default_hash_style}" in
253 sysv | gnu | both) ;;
254 *) AC_MSG_ERROR([bad value ${enable_default_hash_style} for enable-default-hash-style option]) ;;
257 # Enable gnu hash only on GNU targets, but not mips
258 mips*-*-*) enable_default_hash_style=sysv ;;
259 *-*-gnu* | *-*-linux* | *-*-nacl*) enable_default_hash_style=both ;;
260 *) enable_default_hash_style=sysv ;;
263 case "${enable_default_hash_style}" in
264 sysv | both) ac_default_emit_sysv_hash=1 ;;
265 *) ac_default_emit_sysv_hash=0 ;;
268 case "${enable_default_hash_style}" in
269 gnu | both) ac_default_emit_gnu_hash=1 ;;
270 *) ac_default_emit_gnu_hash=0 ;;
273 AC_ARG_ENABLE(initfini-array,
274 [ --disable-initfini-array do not use .init_array/.fini_array sections],
275 [case "${enableval}" in
277 *) AC_MSG_ERROR([invalid --enable-initfini-array argument]) ;;
278 esac], [enable_initfini_array=yes])
279 AC_SUBST(enable_initfini_array)
280 if test $enable_initfini_array = yes; then
281 AC_DEFINE(HAVE_INITFINI_ARRAY, 1,
282 [Define .init_array/.fini_array sections are available and working.])
285 GCC_ENABLE([libctf], [yes], [], [Handle .ctf type-info sections])
286 if test "${enable_libctf}" = yes; then
287 AC_DEFINE(ENABLE_LIBCTF, 1, [Handle .ctf type-info sections])
289 AM_CONDITIONAL(ENABLE_LIBCTF, test "${enable_libctf}" = yes)
290 AC_SUBST(enable_libctf)
292 # Used to validate --package-metadata= input. Disabled by default.
293 AC_ARG_ENABLE([jansson],
294 [AS_HELP_STRING([--enable-jansson],
295 [enable jansson [default=no]])],
296 [enable_jansson=$enableval],
297 [enable_jansson="no"])
299 if test "x$enable_jansson" != "xno"; then
301 AS_IF([test -n "$PKG_CONFIG"],
303 PKG_CHECK_MODULES(JANSSON, [jansson],
305 AC_DEFINE(HAVE_JANSSON, 1, [The jansson library is to be used])
306 AC_SUBST([JANSSON_CFLAGS])
307 AC_SUBST([JANSSON_LIBS])
310 AC_MSG_ERROR([Cannot find jansson library])
314 AC_MSG_ERROR([Cannot find pkg-config])
322 AC_CONFIG_HEADERS([config.h:config.in])
325 AH_VERBATIM([00_CONFIG_H_CHECK],
326 [/* Check that config.h is #included before system headers
327 (this works only for glibc, but that should be enough). */
328 #if defined(__GLIBC__) && !defined(__FreeBSD_kernel__) && !defined(__CONFIG_H__)
329 # error config.h must be #included before system headers
331 #define __CONFIG_H__ 1])
333 if test -z "$target" ; then
334 AC_MSG_ERROR(Unrecognized target system type; please check config.sub.)
336 if test -z "$host" ; then
337 AC_MSG_ERROR(Unrecognized host system type; please check config.sub.)
340 # host-specific stuff:
342 ALL_LINGUAS="bg da de es fi fr ga id it ja pt_BR ru sr sv tr uk vi zh_CN zh_TW"
343 ZW_GNU_GETTEXT_SISTER_DIR
352 AM_CONDITIONAL(GENINSRC_NEVER, false)
353 ACX_PROG_CMP_IGNORE_INITIAL
355 . ${srcdir}/configure.host
358 AC_SUBST(NATIVE_LIB_DIRS)
360 # We use headers from include/ that check various HAVE_*_H macros, thus
361 # should ensure they are set by configure. This is true even when C99
362 # guarantees they are available.
363 # sha1.h and md4.h test HAVE_LIMITS_H, HAVE_SYS_TYPES_H and HAVE_STDINT_H
364 # plugin-api.h tests HAVE_STDINT_H and HAVE_INTTYPES_H
365 # Besides those, we need to check anything used in ld/ not in C99.
366 AC_CHECK_HEADERS(fcntl.h elf-hints.h limits.h inttypes.h stdint.h \
367 sys/file.h sys/mman.h sys/param.h sys/stat.h sys/time.h \
368 sys/types.h unistd.h)
369 AC_CHECK_FUNCS(close glob lseek mkstemp open realpath waitpid)
373 AC_CHECK_DECLS([asprintf, environ])
377 AC_SEARCH_LIBS([dlopen], [dl])
379 AC_MSG_CHECKING(for a known getopt prototype in unistd.h)
380 AC_CACHE_VAL(ld_cv_decl_getopt_unistd_h,
381 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <unistd.h>], [extern int getopt (int, char *const*, const char *);])],
382 ld_cv_decl_getopt_unistd_h=yes, ld_cv_decl_getopt_unistd_h=no)])
383 AC_MSG_RESULT($ld_cv_decl_getopt_unistd_h)
384 if test $ld_cv_decl_getopt_unistd_h = yes; then
385 AC_DEFINE([HAVE_DECL_GETOPT], 1,
386 [Is the prototype for getopt in <unistd.h> in the expected format?])
389 # Link in zlib if we can. This allows us to read and write
390 # compressed CTF sections.
393 # When converting linker scripts into strings for use in emulation
394 # files, use astring.sed if the compiler supports ANSI string
395 # concatenation, or ostring.sed otherwise. This is to support the
396 # broken Microsoft MSVC compiler, which limits the length of string
397 # constants, while still supporting pre-ANSI compilers which do not
398 # support string concatenation.
399 AC_MSG_CHECKING([whether ANSI C string concatenation works])
400 AC_CACHE_VAL(ld_cv_string_concatenation,
401 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [char *a = "a" "a";])],
402 ld_cv_string_concatenation=yes,
403 ld_cv_string_concatenation=no)])
404 AC_MSG_RESULT($ld_cv_string_concatenation)
405 if test "$ld_cv_string_concatenation" = "yes"; then
406 STRINGIFY=astring.sed
408 STRINGIFY=ostring.sed
412 # target-specific stuff:
421 elf_list_options=false
422 elf_shlib_list_options=false
423 elf_plt_unwind_list_options=false
424 for targ_alias in `echo $target_alias $enable_targets | sed 's/,/ /g'`
426 if test "$targ_alias" = "all"; then
428 elf_list_options=true
429 elf_shlib_list_options=true
430 elf_plt_unwind_list_options=true
432 # Canonicalize the secondary target names.
433 result=`$ac_config_sub $targ_alias 2>/dev/null`
434 if test -n "$result"; then
440 . ${srcdir}/configure.tgt
442 if test "$targ" = "$target"; then
446 if test x${enable_64_bit_bfd} = xno; then
447 . ${srcdir}/../bfd/config.bfd
450 if test x${enable_64_bit_bfd} = xyes; then
451 targ_extra_emuls="$targ_extra_emuls $targ64_extra_emuls"
452 targ_extra_libpath="$targ_extra_libpath $targ64_extra_libpath"
455 for i in $targ_emul $targ_extra_emuls $targ_extra_libpath; do
456 case " $all_emuls " in
459 all_emuls="$all_emuls e${i}.o"
460 eval result=\$tdir_$i
461 test -z "$result" && result=$targ_alias
466 elf_list_options=true
469 if $GREP "TEMPLATE_NAME=elf" ${srcdir}/emulparams/${i}.sh >/dev/null 2>/dev/null; then
470 elf_list_options=true
474 if test "$elf_list_options" = "true"; then
479 source_sh ${srcdir}/emulparams/${i}.sh
480 if test x${GENERATE_SHLIB_SCRIPT} = xyes; then
481 elf_shlib_list_options=true
483 if test x${PLT_UNWIND} = xyes; then
484 elf_plt_unwind_list_options=true
491 for i in $targ_emul $targ_extra_libpath; do
492 case " $all_libpath " in
495 if test -z "$all_libpath"; then
498 all_libpath="$all_libpath ${i}"
504 for i in $targ_extra_ofiles; do
505 case " $all_emul_extras " in
508 all_emul_extras="$all_emul_extras ${i}"
516 if test x$ac_default_compressed_debug_sections = xyes ; then
517 AC_DEFINE(DEFAULT_FLAG_COMPRESS_DEBUG, 1, [Define if you want compressed debug sections by default.])
520 if test "${ac_default_new_dtags}" = unset; then
521 ac_default_new_dtags=0
523 AC_DEFINE_UNQUOTED(DEFAULT_NEW_DTAGS,
524 $ac_default_new_dtags,
525 [Define to 1 if you want to set DT_RUNPATH instead of DT_RPATH by default.])
527 if test "${ac_default_ld_z_relro}" = unset; then
528 ac_default_ld_z_relro=0
530 AC_DEFINE_UNQUOTED(DEFAULT_LD_Z_RELRO,
531 $ac_default_ld_z_relro,
532 [Define to 1 if you want to enable -z relro in ELF linker by default.])
534 ac_default_ld_textrel_check_warning=0
535 case "${ac_default_ld_textrel_check}" in
537 ac_default_ld_textrel_check=textrel_check_none
540 ac_default_ld_textrel_check=textrel_check_warning
541 ac_default_ld_textrel_check_warning=1
544 ac_default_ld_textrel_check=textrel_check_error
547 AC_DEFINE_UNQUOTED(DEFAULT_LD_TEXTREL_CHECK,
548 $ac_default_ld_textrel_check,
549 [The default method for DT_TEXTREL check in ELF linker.])
550 AC_DEFINE_UNQUOTED(DEFAULT_LD_TEXTREL_CHECK_WARNING,
551 $ac_default_ld_textrel_check_warning,
552 [Define to 1 if DT_TEXTREL check is warning in ELF linker by default.])
554 if test "${ac_default_ld_z_separate_code}" = unset; then
555 ac_default_ld_z_separate_code=0
557 AC_DEFINE_UNQUOTED(DEFAULT_LD_Z_SEPARATE_CODE,
558 $ac_default_ld_z_separate_code,
559 [Define to 1 if you want to enable -z separate-code in ELF linker by default.])
562 AC_DEFINE_UNQUOTED(DEFAULT_LD_WARN_EXECSTACK,
563 $ac_default_ld_warn_execstack,
564 [Define to 1 if you want to enable --warn-execstack in ELF linker by default.])
566 if test "${ac_default_ld_warn_rwx_segments}" = unset; then
567 ac_default_ld_warn_rwx_segments=1
569 AC_DEFINE_UNQUOTED(DEFAULT_LD_WARN_RWX_SEGMENTS,
570 $ac_default_ld_warn_rwx_segments,
571 [Define to 0 if you want to disable --warn-rwx-segments in ELF linker by default.])
573 if test "${ac_default_ld_default_execstack}" = unset; then
574 ac_default_ld_default_execstack=1
576 AC_DEFINE_UNQUOTED(DEFAULT_LD_EXECSTACK,
577 $ac_default_ld_default_execstack,
578 [Define to 0 if you want to disable the generation of an executable stack when a .note-GNU-stack section is missing.])
581 if test "${ac_support_error_handling_script}" = unset; then
582 ac_support_error_handling_script=1
584 AC_DEFINE_UNQUOTED(SUPPORT_ERROR_HANDLING_SCRIPT,
585 $ac_support_error_handling_script,
586 [Define to 1 if you want to support the --error-handling-script command line option.])
588 AC_DEFINE_UNQUOTED([DEFAULT_EMIT_SYSV_HASH],
589 [$ac_default_emit_sysv_hash],
590 [Define to 1 if you want to emit sysv hash in the ELF linker by default.])
592 AC_DEFINE_UNQUOTED([DEFAULT_EMIT_GNU_HASH],
593 [$ac_default_emit_gnu_hash],
594 [Define to 1 if you want to emit gnu hash in the ELF linker by default.])
596 AC_SUBST(elf_list_options)
597 AC_SUBST(elf_shlib_list_options)
598 AC_SUBST(elf_plt_unwind_list_options)
602 AM_SUBST_NOTMAKE(TDIRS)
604 if test x${all_targets} = xtrue; then
605 if test x${enable_64_bit_bfd} = xyes; then
606 EMULATION_OFILES='$(ALL_EMULATIONS) $(ALL_64_EMULATIONS)'
607 EMUL_EXTRA_OFILES='$(ALL_EMUL_EXTRA_OFILES) $(ALL_64_EMUL_EXTRA_OFILES)'
609 EMULATION_OFILES='$(ALL_EMULATIONS)'
610 EMUL_EXTRA_OFILES='$(ALL_EMUL_EXTRA_OFILES)'
613 EMULATION_OFILES=$all_emuls
614 EMUL_EXTRA_OFILES=$all_emul_extras
616 AC_SUBST(EMULATION_OFILES)
617 AC_SUBST(EMUL_EXTRA_OFILES)
620 EMULATION_LIBPATH=$all_libpath
621 AC_SUBST(EMULATION_LIBPATH)
623 if test x${enable_static} = xno; then
624 TESTBFDLIB="-Wl,--rpath,../bfd/.libs ../bfd/.libs/libbfd.so"
625 TESTCTFLIB="-Wl,--rpath,../libctf/.libs ../libctf/.libs/libctf.so"
627 TESTBFDLIB="../bfd/.libs/libbfd.a"
628 TESTCTFLIB="../libctf/.libs/libctf.a"
630 if test "${enable_libctf}" = no; then
636 target_vendor=${target_vendor=$host_vendor}
637 case "$target_vendor" in
638 hp) EXTRA_SHLIB_EXTENSION=".sl" ;;
639 *) EXTRA_SHLIB_EXTENSION= ;;
643 lynxos) EXTRA_SHLIB_EXTENSION=".a" ;;
646 if test x${EXTRA_SHLIB_EXTENSION} != x ; then
647 AC_DEFINE_UNQUOTED(EXTRA_SHLIB_EXTENSION, "$EXTRA_SHLIB_EXTENSION",
648 [Additional extension a shared object might have.])
651 AC_CONFIG_COMMANDS([default],
655 *) srcdirpre='$(srcdir)/' ;;
659 for lang in dummy $OBSOLETE_ALL_LINGUAS; do
660 if test $lang != dummy; then
661 POFILES="$POFILES $srcdirpre$lang.po"
662 GMOFILES="$GMOFILES $srcdirpre$lang.gmo"
665 sed -e '/^SRC-POTFILES =/r po/SRC-POTFILES' \
666 -e '/^BLD-POTFILES =/r po/BLD-POTFILES' \
667 -e "s,@POFILES@,$POFILES," \
668 -e "s,@GMOFILES@,$GMOFILES," \
669 po/Makefile.in > po/Makefile]],[[]])
671 dnl Required by html, pdf, install-pdf and install-html
672 AC_SUBST(datarootdir)
677 AC_CONFIG_FILES(Makefile po/Makefile.in:po/Make-in)