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/>.
21 m4_include([../bfd/version.m4])
22 AC_INIT([ld], BFD_VERSION)
23 AC_CONFIG_SRCDIR(ldmain.c)
36 AC_USE_SYSTEM_EXTENSIONS
42 AC_ARG_WITH(lib-path, [ --with-lib-path=dir1:dir2... set default LIB_PATH],LIB_PATH=$withval)
43 AC_ARG_ENABLE(targets,
44 [ --enable-targets alternative target configurations],
45 [case "${enableval}" in
46 yes | "") AC_MSG_ERROR(enable-targets option must specify target names or 'all')
48 no) enable_targets= ;;
49 *) enable_targets=$enableval ;;
51 AC_ARG_ENABLE(64-bit-bfd,
52 [ --enable-64-bit-bfd 64-bit support (on hosts with narrower word sizes)],
53 [case "${enableval}" in
56 *) AC_MSG_ERROR(bad value ${enableval} for 64-bit-bfd option) ;;
57 esac],[want64=false])dnl
60 [ --with-sysroot[=DIR] Search for usr/lib et al within DIR.],
62 case ${with_sysroot} in
63 yes) TARGET_SYSTEM_ROOT='${exec_prefix}/${target_alias}/sys-root' ;;
64 *) TARGET_SYSTEM_ROOT=$with_sysroot ;;
67 TARGET_SYSTEM_ROOT_DEFINE='-DTARGET_SYSTEM_ROOT=\"$(TARGET_SYSTEM_ROOT)\"'
70 if test "x$prefix" = xNONE; then
71 test_prefix=/usr/local
75 if test "x$exec_prefix" = xNONE; then
76 test_exec_prefix=$test_prefix
78 test_exec_prefix=$exec_prefix
80 case ${TARGET_SYSTEM_ROOT} in
81 "${test_prefix}"|"${test_prefix}/"*|\
82 "${test_exec_prefix}"|"${test_exec_prefix}/"*|\
83 '${prefix}'|'${prefix}/'*|\
84 '${exec_prefix}'|'${exec_prefix}/'*)
85 t="$TARGET_SYSTEM_ROOT_DEFINE -DTARGET_SYSTEM_ROOT_RELOCATABLE"
86 TARGET_SYSTEM_ROOT_DEFINE="$t"
92 TARGET_SYSTEM_ROOT_DEFINE='-DTARGET_SYSTEM_ROOT=\"\"'
95 AC_SUBST(TARGET_SYSTEM_ROOT)
96 AC_SUBST(TARGET_SYSTEM_ROOT_DEFINE)
98 dnl Use --enable-gold to decide if this linker should be the default.
99 dnl "install_as_default" is set to false if gold is the default linker.
100 dnl "installed_linker" is the installed BFD linker name.
102 [[ --enable-gold[=ARG] build gold [ARG={default,yes,no}]]],
103 [case "${enableval}" in
105 install_as_default=no
106 installed_linker=ld.bfd
109 install_as_default=yes
110 installed_linker=ld.bfd
113 AC_MSG_ERROR([invalid --enable-gold argument])
116 [install_as_default=yes
117 installed_linker=ld.bfd])
118 AC_SUBST(install_as_default)
119 AC_SUBST(installed_linker)
122 AS_HELP_STRING([--enable-got=<type>],
123 [GOT handling scheme (target, single, negative, multigot)]),
124 [case "${enableval}" in
125 target | single | negative | multigot) got_handling=$enableval ;;
126 *) AC_MSG_ERROR(bad value ${enableval} for --enable-got option) ;;
128 [got_handling=target])
130 case "${got_handling}" in
132 AC_DEFINE([GOT_HANDLING_DEFAULT], [GOT_HANDLING_TARGET_DEFAULT],
133 [Define to choose default GOT handling scheme]) ;;
135 AC_DEFINE([GOT_HANDLING_DEFAULT], [GOT_HANDLING_SINGLE],
136 [Define to choose default GOT handling scheme]) ;;
138 AC_DEFINE([GOT_HANDLING_DEFAULT], [GOT_HANDLING_NEGATIVE],
139 [Define to choose default GOT handling scheme]) ;;
141 AC_DEFINE([GOT_HANDLING_DEFAULT], [GOT_HANDLING_MULTIGOT],
142 [Define to choose default GOT handling scheme]) ;;
143 *) AC_MSG_ERROR(bad value ${got_handling} for --enable-got option) ;;
147 # Decide the default method for compressing debug sections.
148 ac_default_compressed_debug_sections=unset
149 # Provide a configure time option to override our default.
150 AC_ARG_ENABLE(compressed_debug_sections,
151 AS_HELP_STRING([--enable-compressed-debug-sections={all,ld,none}],
152 [compress debug sections by default])],
153 [case ,"${enableval}", in
154 ,yes, | ,all, | *,ld,*) ac_default_compressed_debug_sections=yes ;;
155 ,no, | ,none,) ac_default_compressed_debug_sections=no ;;
158 # Decide setting DT_RUNPATH instead of DT_RPATH by default
159 ac_default_new_dtags=unset
160 # Provide a configure time option to override our default.
161 AC_ARG_ENABLE(new_dtags,
162 AS_HELP_STRING([--enable-new-dtags],
163 [set DT_RUNPATH instead of DT_RPATH by default])],
164 [case "${enableval}" in
165 yes) ac_default_new_dtags=1 ;;
166 no) ac_default_new_dtags=0 ;;
169 # Decide if -z relro should be enabled in ELF linker by default.
170 ac_default_ld_z_relro=unset
171 # Provide a configure time option to override our default.
173 AS_HELP_STRING([--enable-relro],
174 [enable -z relro in ELF linker by default]),
175 [case "${enableval}" in
176 yes) ac_default_ld_z_relro=1 ;;
177 no) ac_default_ld_z_relro=0 ;;
180 # Decide if -z separate-code should be enabled in ELF linker by default.
181 ac_default_ld_z_separate_code=unset
182 AC_ARG_ENABLE(separate-code,
183 AS_HELP_STRING([--enable-separate-code],
184 [enable -z separate-code in ELF linker by default]),
185 [case "${enableval}" in
186 yes) ac_default_ld_z_separate_code=1 ;;
187 no) ac_default_ld_z_separate_code=0 ;;
190 # Decide which "--hash-style" to use by default
191 # Provide a configure time option to override our default.
192 AC_ARG_ENABLE([default-hash-style],
193 AS_HELP_STRING([--enable-default-hash-style={sysv,gnu,both}],
194 [use this default hash style]),
195 [case "${enable_default_hash_style}" in
196 sysv | gnu | both) ;;
197 *) AC_MSG_ERROR([bad value ${enable_default_hash_style} for enable-default-hash-style option]) ;;
200 # Enable gnu hash only on GNU targets, but not mips
201 mips*-*-*) enable_default_hash_style=sysv ;;
202 *-*-gnu* | *-*-linux* | *-*-nacl*) enable_default_hash_style=both ;;
203 *) enable_default_hash_style=sysv ;;
206 case "${enable_default_hash_style}" in
207 sysv | both) ac_default_emit_sysv_hash=1 ;;
208 *) ac_default_emit_sysv_hash=0 ;;
211 case "${enable_default_hash_style}" in
212 gnu | both) ac_default_emit_gnu_hash=1 ;;
213 *) ac_default_emit_gnu_hash=0 ;;
220 AC_CONFIG_HEADERS([config.h:config.in])
223 AH_VERBATIM([00_CONFIG_H_CHECK],
224 [/* Check that config.h is #included before system headers
225 (this works only for glibc, but that should be enough). */
226 #if defined(__GLIBC__) && !defined(__FreeBSD_kernel__) && !defined(__CONFIG_H__)
227 # error config.h must be #included before system headers
229 #define __CONFIG_H__ 1])
231 if test -z "$target" ; then
232 AC_MSG_ERROR(Unrecognized target system type; please check config.sub.)
234 if test -z "$host" ; then
235 AC_MSG_ERROR(Unrecognized host system type; please check config.sub.)
238 # host-specific stuff:
240 ALL_LINGUAS="bg da de es fi fr ga id it ja pt_BR ru sr sv tr uk vi zh_CN zh_TW"
241 ZW_GNU_GETTEXT_SISTER_DIR
250 AM_CONDITIONAL(GENINSRC_NEVER, false)
251 ACX_PROG_CMP_IGNORE_INITIAL
253 . ${srcdir}/configure.host
256 AC_SUBST(NATIVE_LIB_DIRS)
258 AC_CHECK_HEADERS(string.h strings.h stdlib.h unistd.h elf-hints.h limits.h locale.h sys/param.h)
259 AC_CHECK_HEADERS(fcntl.h sys/file.h sys/time.h sys/stat.h)
261 AC_CHECK_FUNCS(glob mkstemp realpath sbrk setlocale waitpid)
262 AC_CHECK_FUNCS(open lseek close)
265 dnl AC_CHECK_HEADERS(sys/mman.h)
268 AC_SEARCH_LIBS([dlopen], [dl])
269 AM_CONDITIONAL([ENABLE_PLUGINS], [test x$plugins = xyes])
271 AC_ARG_ENABLE(initfini-array,
272 [ --disable-initfini-array do not use .init_array/.fini_array sections],
273 [case "${enableval}" in
275 *) AC_MSG_ERROR([invalid --enable-initfini-array argument]) ;;
276 esac], [enable_initfini_array=yes])
277 AC_SUBST(enable_initfini_array)
278 if test $enable_initfini_array = yes; then
279 AC_DEFINE(HAVE_INITFINI_ARRAY, 1,
280 [Define .init_array/.fini_array sections are available and working.])
283 AC_MSG_CHECKING(for a known getopt prototype in unistd.h)
284 AC_CACHE_VAL(ld_cv_decl_getopt_unistd_h,
285 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <unistd.h>], [extern int getopt (int, char *const*, const char *);])],
286 ld_cv_decl_getopt_unistd_h=yes, ld_cv_decl_getopt_unistd_h=no)])
287 AC_MSG_RESULT($ld_cv_decl_getopt_unistd_h)
288 if test $ld_cv_decl_getopt_unistd_h = yes; then
289 AC_DEFINE([HAVE_DECL_GETOPT], 1,
290 [Is the prototype for getopt in <unistd.h> in the expected format?])
295 AC_CHECK_DECLS([strstr, free, sbrk, getenv, environ])
297 # When converting linker scripts into strings for use in emulation
298 # files, use astring.sed if the compiler supports ANSI string
299 # concatenation, or ostring.sed otherwise. This is to support the
300 # broken Microsoft MSVC compiler, which limits the length of string
301 # constants, while still supporting pre-ANSI compilers which do not
302 # support string concatenation.
303 AC_MSG_CHECKING([whether ANSI C string concatenation works])
304 AC_CACHE_VAL(ld_cv_string_concatenation,
305 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [char *a = "a" "a";])],
306 ld_cv_string_concatenation=yes,
307 ld_cv_string_concatenation=no)])
308 AC_MSG_RESULT($ld_cv_string_concatenation)
309 if test "$ld_cv_string_concatenation" = "yes"; then
310 STRINGIFY=astring.sed
312 STRINGIFY=ostring.sed
316 # target-specific stuff:
324 dnl We need to get an arbitrary number of tdir definitions into
325 dnl Makefile. We can't do it using AC_SUBST, because autoconf does
326 dnl not permit literal newlines in an AC_SUBST variables. So we use a
330 # If the host is 64-bit, then we enable 64-bit targets by default.
331 # This is consistent with what ../bfd/configure.ac does.
332 if test x${want64} = xfalse; then
333 AC_CHECK_SIZEOF(void *)
334 if test "x${ac_cv_sizeof_void_p}" = "x8"; then
339 elf_list_options=FALSE
340 elf_shlib_list_options=FALSE
341 elf_plt_unwind_list_options=FALSE
342 for targ_alias in `echo $target_alias $enable_targets | sed 's/,/ /g'`
344 if test "$targ_alias" = "all"; then
346 elf_list_options=TRUE
347 elf_shlib_list_options=TRUE
348 elf_plt_unwind_list_options=TRUE
350 # Canonicalize the secondary target names.
351 result=`$ac_config_sub $targ_alias 2>/dev/null`
352 if test -n "$result"; then
358 . ${srcdir}/configure.tgt
360 if test "$targ" = "$target"; then
364 if test x${want64} = xfalse; then
365 . ${srcdir}/../bfd/config.bfd
368 if test x${want64} = xtrue; then
369 targ_extra_emuls="$targ_extra_emuls $targ64_extra_emuls"
370 targ_extra_libpath="$targ_extra_libpath $targ64_extra_libpath"
373 for i in $targ_emul $targ_extra_emuls $targ_extra_libpath; do
374 case " $all_emuls " in
377 all_emuls="$all_emuls e${i}.o"
378 eval result=\$tdir_$i
379 test -z "$result" && result=$targ_alias
380 echo tdir_$i=$result >> tdirs
383 elf_list_options=TRUE
386 if $GREP "TEMPLATE_NAME=elf32" ${srcdir}/emulparams/${i}.sh >/dev/null 2>/dev/null; then
387 elf_list_options=TRUE
391 if test "$elf_list_options" = "TRUE"; then
392 . ${srcdir}/emulparams/${i}.sh
393 if test x${GENERATE_SHLIB_SCRIPT} = xyes; then
394 elf_shlib_list_options=TRUE
396 if test x${PLT_UNWIND} = xyes; then
397 elf_plt_unwind_list_options=TRUE
404 for i in $targ_emul $targ_extra_libpath; do
405 case " $all_libpath " in
408 if test -z "$all_libpath"; then
411 all_libpath="$all_libpath ${i}"
417 for i in $targ_extra_ofiles; do
418 case " $all_emul_extras " in
421 all_emul_extras="$all_emul_extras ${i}"
429 if test x$ac_default_compressed_debug_sections = xyes ; then
430 AC_DEFINE(DEFAULT_FLAG_COMPRESS_DEBUG, 1, [Define if you want compressed debug sections by default.])
433 if test "${ac_default_new_dtags}" = unset; then
434 ac_default_new_dtags=0
436 AC_DEFINE_UNQUOTED(DEFAULT_NEW_DTAGS,
437 $ac_default_new_dtags,
438 [Define to 1 if you want to set DT_RUNPATH instead of DT_RPATH by default.])
440 if test "${ac_default_ld_z_relro}" = unset; then
441 ac_default_ld_z_relro=0
443 AC_DEFINE_UNQUOTED(DEFAULT_LD_Z_RELRO,
444 $ac_default_ld_z_relro,
445 [Define to 1 if you want to enable -z relro in ELF linker by default.])
447 if test "${ac_default_ld_z_separate_code}" = unset; then
448 ac_default_ld_z_separate_code=0
450 AC_DEFINE_UNQUOTED(DEFAULT_LD_Z_SEPARATE_CODE,
451 $ac_default_ld_z_separate_code,
452 [Define to 1 if you want to enable -z separate-code in ELF linker by default.])
454 AC_DEFINE_UNQUOTED([DEFAULT_EMIT_SYSV_HASH],
455 [$ac_default_emit_sysv_hash],
456 [Define to 1 if you want to emit sysv hash in the ELF linker by default.])
458 AC_DEFINE_UNQUOTED([DEFAULT_EMIT_GNU_HASH],
459 [$ac_default_emit_gnu_hash],
460 [Define to 1 if you want to emit gnu hash in the ELF linker by default.])
462 AC_SUBST(elf_list_options)
463 AC_SUBST(elf_shlib_list_options)
464 AC_SUBST(elf_plt_unwind_list_options)
470 if test x${all_targets} = xtrue; then
471 if test x${want64} = xtrue; then
472 EMULATION_OFILES='$(ALL_EMULATIONS) $(ALL_64_EMULATIONS)'
473 EMUL_EXTRA_OFILES='$(ALL_EMUL_EXTRA_OFILES) $(ALL_64_EMUL_EXTRA_OFILES)'
475 EMULATION_OFILES='$(ALL_EMULATIONS)'
476 EMUL_EXTRA_OFILES='$(ALL_EMUL_EXTRA_OFILES)'
479 EMULATION_OFILES=$all_emuls
480 EMUL_EXTRA_OFILES=$all_emul_extras
482 AC_SUBST(EMULATION_OFILES)
483 AC_SUBST(EMUL_EXTRA_OFILES)
486 EMULATION_LIBPATH=$all_libpath
487 AC_SUBST(EMULATION_LIBPATH)
489 if test x${enable_static} = xno; then
490 TESTBFDLIB="-Wl,--rpath,../bfd/.libs ../bfd/.libs/libbfd.so"
492 TESTBFDLIB="../bfd/.libs/libbfd.a"
496 target_vendor=${target_vendor=$host_vendor}
497 case "$target_vendor" in
498 hp) EXTRA_SHLIB_EXTENSION=".sl" ;;
499 *) EXTRA_SHLIB_EXTENSION= ;;
503 lynxos) EXTRA_SHLIB_EXTENSION=".a" ;;
506 if test x${EXTRA_SHLIB_EXTENSION} != x ; then
507 AC_DEFINE_UNQUOTED(EXTRA_SHLIB_EXTENSION, "$EXTRA_SHLIB_EXTENSION",
508 [Additional extension a shared object might have.])
511 AC_CONFIG_COMMANDS([default],
515 *) srcdirpre='$(srcdir)/' ;;
519 for lang in dummy $OBSOLETE_ALL_LINGUAS; do
520 if test $lang != dummy; then
521 POFILES="$POFILES $srcdirpre$lang.po"
522 GMOFILES="$GMOFILES $srcdirpre$lang.gmo"
525 sed -e '/^SRC-POTFILES =/r po/SRC-POTFILES' \
526 -e '/^BLD-POTFILES =/r po/BLD-POTFILES' \
527 -e "s,@POFILES@,$POFILES," \
528 -e "s,@GMOFILES@,$GMOFILES," \
529 po/Makefile.in > po/Makefile]],[[]])
531 dnl Required by html, pdf, install-pdf and install-html
532 AC_SUBST(datarootdir)
537 AC_CONFIG_FILES(Makefile po/Makefile.in:po/Make-in)