1 dnl Process this file with autoconf to produce a configure script
3 dnl Copyright (C) 2012-2018 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)
35 AC_USE_SYSTEM_EXTENSIONS
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')
47 no) enable_targets= ;;
48 *) enable_targets=$enableval ;;
50 AC_ARG_ENABLE(64-bit-bfd,
51 [ --enable-64-bit-bfd 64-bit support (on hosts with narrower word sizes)],
52 [case "${enableval}" in
55 *) AC_MSG_ERROR(bad value ${enableval} for 64-bit-bfd option) ;;
56 esac],[want64=false])dnl
59 [ --with-sysroot[=DIR] Search for usr/lib et al within DIR.],
61 case ${with_sysroot} in
62 yes) TARGET_SYSTEM_ROOT='${exec_prefix}/${target_alias}/sys-root' ;;
63 *) TARGET_SYSTEM_ROOT=$with_sysroot ;;
66 TARGET_SYSTEM_ROOT_DEFINE='-DTARGET_SYSTEM_ROOT=\"$(TARGET_SYSTEM_ROOT)\"'
69 if test "x$prefix" = xNONE; then
70 test_prefix=/usr/local
74 if test "x$exec_prefix" = xNONE; then
75 test_exec_prefix=$test_prefix
77 test_exec_prefix=$exec_prefix
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="$t"
91 TARGET_SYSTEM_ROOT_DEFINE='-DTARGET_SYSTEM_ROOT=\"\"'
94 AC_SUBST(TARGET_SYSTEM_ROOT)
95 AC_SUBST(TARGET_SYSTEM_ROOT_DEFINE)
97 dnl Use --enable-gold to decide if this linker should be the default.
98 dnl "install_as_default" is set to false if gold is the default linker.
99 dnl "installed_linker" is the installed BFD linker name.
101 [[ --enable-gold[=ARG] build gold [ARG={default,yes,no}]]],
102 [case "${enableval}" in
104 install_as_default=no
105 installed_linker=ld.bfd
108 install_as_default=yes
109 installed_linker=ld.bfd
112 AC_MSG_ERROR([invalid --enable-gold argument])
115 [install_as_default=yes
116 installed_linker=ld.bfd])
117 AC_SUBST(install_as_default)
118 AC_SUBST(installed_linker)
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 ${enableval} for --enable-got option) ;;
127 [got_handling=target])
129 case "${got_handling}" in
131 AC_DEFINE([GOT_HANDLING_DEFAULT], [GOT_HANDLING_TARGET_DEFAULT],
132 [Define to choose default GOT handling scheme]) ;;
134 AC_DEFINE([GOT_HANDLING_DEFAULT], [GOT_HANDLING_SINGLE],
135 [Define to choose default GOT handling scheme]) ;;
137 AC_DEFINE([GOT_HANDLING_DEFAULT], [GOT_HANDLING_NEGATIVE],
138 [Define to choose default GOT handling scheme]) ;;
140 AC_DEFINE([GOT_HANDLING_DEFAULT], [GOT_HANDLING_MULTIGOT],
141 [Define to choose default GOT handling scheme]) ;;
142 *) AC_MSG_ERROR(bad value ${got_handling} for --enable-got option) ;;
146 # Decide the default method for compressing debug sections.
147 ac_default_compressed_debug_sections=unset
148 # Provide a configure time option to override our default.
149 AC_ARG_ENABLE(compressed_debug_sections,
150 AS_HELP_STRING([--enable-compressed-debug-sections={all,ld,none}],
151 [compress debug sections by default])],
152 [case ,"${enableval}", in
153 ,yes, | ,all, | *,ld,*) ac_default_compressed_debug_sections=yes ;;
154 ,no, | ,none,) ac_default_compressed_debug_sections=no ;;
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 "${enableval}" in
164 yes) ac_default_new_dtags=1 ;;
165 no) ac_default_new_dtags=0 ;;
168 # Decide if -z relro should be enabled in ELF linker by default.
169 ac_default_ld_z_relro=unset
170 # Provide a configure time option to override our default.
172 AS_HELP_STRING([--enable-relro],
173 [enable -z relro in ELF linker by default]),
174 [case "${enableval}" in
175 yes) ac_default_ld_z_relro=1 ;;
176 no) ac_default_ld_z_relro=0 ;;
179 # Decide if -z separate-code should be enabled in ELF linker by default.
180 ac_default_ld_z_separate_code=unset
181 AC_ARG_ENABLE(separate-code,
182 AS_HELP_STRING([--enable-separate-code],
183 [enable -z separate-code in ELF linker by default]),
184 [case "${enableval}" in
185 yes) ac_default_ld_z_separate_code=1 ;;
186 no) ac_default_ld_z_separate_code=0 ;;
189 # Decide which "--hash-style" to use by default
190 # Provide a configure time option to override our default.
191 AC_ARG_ENABLE([default-hash-style],
192 AS_HELP_STRING([--enable-default-hash-style={sysv,gnu,both}],
193 [use this default hash style]),
194 [case "${enable_default_hash_style}" in
195 sysv | gnu | both) ;;
196 *) AC_MSG_ERROR([bad value ${enable_default_hash_style} for enable-default-hash-style option]) ;;
199 # Enable gnu hash only on GNU targets, but not mips
200 mips*-*-*) enable_default_hash_style=sysv ;;
201 *-*-gnu* | *-*-linux* | *-*-nacl*) enable_default_hash_style=both ;;
202 *) enable_default_hash_style=sysv ;;
205 case "${enable_default_hash_style}" in
206 sysv | both) ac_default_emit_sysv_hash=1 ;;
207 *) ac_default_emit_sysv_hash=0 ;;
210 case "${enable_default_hash_style}" in
211 gnu | both) ac_default_emit_gnu_hash=1 ;;
212 *) ac_default_emit_gnu_hash=0 ;;
219 AC_CONFIG_HEADERS([config.h:config.in])
222 AH_VERBATIM([00_CONFIG_H_CHECK],
223 [/* Check that config.h is #included before system headers
224 (this works only for glibc, but that should be enough). */
225 #if defined(__GLIBC__) && !defined(__FreeBSD_kernel__) && !defined(__CONFIG_H__)
226 # error config.h must be #included before system headers
228 #define __CONFIG_H__ 1])
230 if test -z "$target" ; then
231 AC_MSG_ERROR(Unrecognized target system type; please check config.sub.)
233 if test -z "$host" ; then
234 AC_MSG_ERROR(Unrecognized host system type; please check config.sub.)
237 # host-specific stuff:
239 ALL_LINGUAS="bg da de es fi fr ga id it ja pt_BR ru sr sv tr uk vi zh_CN zh_TW"
240 ZW_GNU_GETTEXT_SISTER_DIR
249 AM_CONDITIONAL(GENINSRC_NEVER, false)
250 ACX_PROG_CMP_IGNORE_INITIAL
252 . ${srcdir}/configure.host
255 AC_SUBST(NATIVE_LIB_DIRS)
257 AC_CHECK_HEADERS(string.h strings.h stdlib.h unistd.h elf-hints.h limits.h locale.h sys/param.h)
258 AC_CHECK_HEADERS(fcntl.h sys/file.h sys/time.h sys/stat.h)
260 AC_CHECK_FUNCS(glob mkstemp realpath sbrk setlocale waitpid)
261 AC_CHECK_FUNCS(open lseek close)
264 dnl AC_CHECK_HEADERS(sys/mman.h)
267 AC_SEARCH_LIBS([dlopen], [dl])
268 AM_CONDITIONAL([ENABLE_PLUGINS], [test x$plugins = xyes])
270 AC_ARG_ENABLE(initfini-array,
271 [ --disable-initfini-array do not use .init_array/.fini_array sections],
272 [case "${enableval}" in
274 *) AC_MSG_ERROR([invalid --enable-initfini-array argument]) ;;
275 esac], [enable_initfini_array=yes])
276 AC_SUBST(enable_initfini_array)
277 if test $enable_initfini_array = yes; then
278 AC_DEFINE(HAVE_INITFINI_ARRAY, 1,
279 [Define .init_array/.fini_array sections are available and working.])
282 AC_MSG_CHECKING(for a known getopt prototype in unistd.h)
283 AC_CACHE_VAL(ld_cv_decl_getopt_unistd_h,
284 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <unistd.h>], [extern int getopt (int, char *const*, const char *);])],
285 ld_cv_decl_getopt_unistd_h=yes, ld_cv_decl_getopt_unistd_h=no)])
286 AC_MSG_RESULT($ld_cv_decl_getopt_unistd_h)
287 if test $ld_cv_decl_getopt_unistd_h = yes; then
288 AC_DEFINE([HAVE_DECL_GETOPT], 1,
289 [Is the prototype for getopt in <unistd.h> in the expected format?])
294 AC_CHECK_DECLS([strstr, free, sbrk, getenv, environ])
296 # When converting linker scripts into strings for use in emulation
297 # files, use astring.sed if the compiler supports ANSI string
298 # concatenation, or ostring.sed otherwise. This is to support the
299 # broken Microsoft MSVC compiler, which limits the length of string
300 # constants, while still supporting pre-ANSI compilers which do not
301 # support string concatenation.
302 AC_MSG_CHECKING([whether ANSI C string concatenation works])
303 AC_CACHE_VAL(ld_cv_string_concatenation,
304 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [char *a = "a" "a";])],
305 ld_cv_string_concatenation=yes,
306 ld_cv_string_concatenation=no)])
307 AC_MSG_RESULT($ld_cv_string_concatenation)
308 if test "$ld_cv_string_concatenation" = "yes"; then
309 STRINGIFY=astring.sed
311 STRINGIFY=ostring.sed
315 # target-specific stuff:
323 dnl We need to get an arbitrary number of tdir definitions into
324 dnl Makefile. We can't do it using AC_SUBST, because autoconf does
325 dnl not permit literal newlines in an AC_SUBST variables. So we use a
329 # If the host is 64-bit, then we enable 64-bit targets by default.
330 # This is consistent with what ../bfd/configure.ac does.
331 if test x${want64} = xfalse; then
332 AC_CHECK_SIZEOF(void *)
333 if test "x${ac_cv_sizeof_void_p}" = "x8"; then
338 elf_list_options=FALSE
339 elf_shlib_list_options=FALSE
340 elf_plt_unwind_list_options=FALSE
341 for targ_alias in `echo $target_alias $enable_targets | sed 's/,/ /g'`
343 if test "$targ_alias" = "all"; then
345 elf_list_options=TRUE
346 elf_shlib_list_options=TRUE
347 elf_plt_unwind_list_options=TRUE
349 # Canonicalize the secondary target names.
350 result=`$ac_config_sub $targ_alias 2>/dev/null`
351 if test -n "$result"; then
357 . ${srcdir}/configure.tgt
359 if test "$targ" = "$target"; then
363 if test x${want64} = xfalse; then
364 . ${srcdir}/../bfd/config.bfd
367 if test x${want64} = xtrue; then
368 targ_extra_emuls="$targ_extra_emuls $targ64_extra_emuls"
369 targ_extra_libpath="$targ_extra_libpath $targ64_extra_libpath"
372 for i in $targ_emul $targ_extra_emuls $targ_extra_libpath; do
373 case " $all_emuls " in
376 all_emuls="$all_emuls e${i}.o"
377 eval result=\$tdir_$i
378 test -z "$result" && result=$targ_alias
379 echo tdir_$i=$result >> tdirs
382 elf_list_options=TRUE
385 if $GREP "TEMPLATE_NAME=elf32" ${srcdir}/emulparams/${i}.sh >/dev/null 2>/dev/null; then
386 elf_list_options=TRUE
390 if test "$elf_list_options" = "TRUE"; then
391 . ${srcdir}/emulparams/${i}.sh
392 if test x${GENERATE_SHLIB_SCRIPT} = xyes; then
393 elf_shlib_list_options=TRUE
395 if test x${PLT_UNWIND} = xyes; then
396 elf_plt_unwind_list_options=TRUE
403 for i in $targ_emul $targ_extra_libpath; do
404 case " $all_libpath " in
407 if test -z "$all_libpath"; then
410 all_libpath="$all_libpath ${i}"
416 for i in $targ_extra_ofiles; do
417 case " $all_emul_extras " in
420 all_emul_extras="$all_emul_extras ${i}"
428 if test x$ac_default_compressed_debug_sections = xyes ; then
429 AC_DEFINE(DEFAULT_FLAG_COMPRESS_DEBUG, 1, [Define if you want compressed debug sections by default.])
432 if test "${ac_default_new_dtags}" = unset; then
433 ac_default_new_dtags=0
435 AC_DEFINE_UNQUOTED(DEFAULT_NEW_DTAGS,
436 $ac_default_new_dtags,
437 [Define to 1 if you want to set DT_RUNPATH instead of DT_RPATH by default.])
439 if test "${ac_default_ld_z_relro}" = unset; then
440 ac_default_ld_z_relro=0
442 AC_DEFINE_UNQUOTED(DEFAULT_LD_Z_RELRO,
443 $ac_default_ld_z_relro,
444 [Define to 1 if you want to enable -z relro in ELF linker by default.])
446 if test "${ac_default_ld_z_separate_code}" = unset; then
447 ac_default_ld_z_separate_code=0
449 AC_DEFINE_UNQUOTED(DEFAULT_LD_Z_SEPARATE_CODE,
450 $ac_default_ld_z_separate_code,
451 [Define to 1 if you want to enable -z separate-code in ELF linker by default.])
453 AC_DEFINE_UNQUOTED([DEFAULT_EMIT_SYSV_HASH],
454 [$ac_default_emit_sysv_hash],
455 [Define to 1 if you want to emit sysv hash in the ELF linker by default.])
457 AC_DEFINE_UNQUOTED([DEFAULT_EMIT_GNU_HASH],
458 [$ac_default_emit_gnu_hash],
459 [Define to 1 if you want to emit gnu hash in the ELF linker by default.])
461 AC_SUBST(elf_list_options)
462 AC_SUBST(elf_shlib_list_options)
463 AC_SUBST(elf_plt_unwind_list_options)
469 if test x${all_targets} = xtrue; then
470 if test x${want64} = xtrue; then
471 EMULATION_OFILES='$(ALL_EMULATIONS) $(ALL_64_EMULATIONS)'
472 EMUL_EXTRA_OFILES='$(ALL_EMUL_EXTRA_OFILES) $(ALL_64_EMUL_EXTRA_OFILES)'
474 EMULATION_OFILES='$(ALL_EMULATIONS)'
475 EMUL_EXTRA_OFILES='$(ALL_EMUL_EXTRA_OFILES)'
478 EMULATION_OFILES=$all_emuls
479 EMUL_EXTRA_OFILES=$all_emul_extras
481 AC_SUBST(EMULATION_OFILES)
482 AC_SUBST(EMUL_EXTRA_OFILES)
485 EMULATION_LIBPATH=$all_libpath
486 AC_SUBST(EMULATION_LIBPATH)
488 if test x${enable_static} = xno; then
489 TESTBFDLIB="-Wl,--rpath,../bfd/.libs ../bfd/.libs/libbfd.so"
491 TESTBFDLIB="../bfd/.libs/libbfd.a"
495 target_vendor=${target_vendor=$host_vendor}
496 case "$target_vendor" in
497 hp) EXTRA_SHLIB_EXTENSION=".sl" ;;
498 *) EXTRA_SHLIB_EXTENSION= ;;
502 lynxos) EXTRA_SHLIB_EXTENSION=".a" ;;
505 if test x${EXTRA_SHLIB_EXTENSION} != x ; then
506 AC_DEFINE_UNQUOTED(EXTRA_SHLIB_EXTENSION, "$EXTRA_SHLIB_EXTENSION",
507 [Additional extension a shared object might have.])
510 AC_CONFIG_COMMANDS([default],
514 *) srcdirpre='$(srcdir)/' ;;
518 for lang in dummy $OBSOLETE_ALL_LINGUAS; do
519 if test $lang != dummy; then
520 POFILES="$POFILES $srcdirpre$lang.po"
521 GMOFILES="$GMOFILES $srcdirpre$lang.gmo"
524 sed -e '/^SRC-POTFILES =/r po/SRC-POTFILES' \
525 -e '/^BLD-POTFILES =/r po/BLD-POTFILES' \
526 -e "s,@POFILES@,$POFILES," \
527 -e "s,@GMOFILES@,$GMOFILES," \
528 po/Makefile.in > po/Makefile]],[[]])
530 dnl Required by html, pdf, install-pdf and install-html
531 AC_SUBST(datarootdir)
536 AC_CONFIG_FILES(Makefile po/Makefile.in:po/Make-in)