1 dnl Process this file with autoconf to produce a configure script
3 dnl Copyright (C) 2012-2017 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 if -z relro should be enabled in ELF linker by default.
159 ac_default_ld_z_relro=unset
160 # Provide a configure time option to override our default.
162 AS_HELP_STRING([--enable-relro],
163 [enable -z relro in ELF linker by default]),
164 [case "${enableval}" in
165 yes) ac_default_ld_z_relro=1 ;;
166 no) ac_default_ld_z_relro=0 ;;
173 AC_CONFIG_HEADERS([config.h:config.in])
176 AH_VERBATIM([00_CONFIG_H_CHECK],
177 [/* Check that config.h is #included before system headers
178 (this works only for glibc, but that should be enough). */
179 #if defined(__GLIBC__) && !defined(__FreeBSD_kernel__) && !defined(__CONFIG_H__)
180 # error config.h must be #included before system headers
182 #define __CONFIG_H__ 1])
184 if test -z "$target" ; then
185 AC_MSG_ERROR(Unrecognized target system type; please check config.sub.)
187 if test -z "$host" ; then
188 AC_MSG_ERROR(Unrecognized host system type; please check config.sub.)
191 # host-specific stuff:
193 ALL_LINGUAS="fr sv tr es da vi zh_CN zh_TW ga fi id bg it uk"
194 ZW_GNU_GETTEXT_SISTER_DIR
203 AM_CONDITIONAL(GENINSRC_NEVER, false)
204 ACX_PROG_CMP_IGNORE_INITIAL
206 . ${srcdir}/configure.host
209 AC_SUBST(NATIVE_LIB_DIRS)
211 AC_CHECK_HEADERS(string.h strings.h stdlib.h unistd.h elf-hints.h limits.h locale.h sys/param.h)
212 AC_CHECK_HEADERS(fcntl.h sys/file.h sys/time.h sys/stat.h)
214 AC_CHECK_FUNCS(glob mkstemp realpath sbrk setlocale waitpid)
215 AC_CHECK_FUNCS(open lseek close)
218 dnl AC_CHECK_HEADERS(sys/mman.h)
221 AC_SEARCH_LIBS([dlopen], [dl])
222 AM_CONDITIONAL([ENABLE_PLUGINS], [test x$plugins = xyes])
224 AC_ARG_ENABLE(initfini-array,
225 [ --disable-initfini-array do not use .init_array/.fini_array sections],
226 [case "${enableval}" in
228 *) AC_MSG_ERROR([invalid --enable-initfini-array argument]) ;;
229 esac], [enable_initfini_array=yes])
230 AC_SUBST(enable_initfini_array)
231 if test $enable_initfini_array = yes; then
232 AC_DEFINE(HAVE_INITFINI_ARRAY, 1,
233 [Define .init_array/.fini_array sections are available and working.])
236 AC_MSG_CHECKING(for a known getopt prototype in unistd.h)
237 AC_CACHE_VAL(ld_cv_decl_getopt_unistd_h,
238 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <unistd.h>], [extern int getopt (int, char *const*, const char *);])],
239 ld_cv_decl_getopt_unistd_h=yes, ld_cv_decl_getopt_unistd_h=no)])
240 AC_MSG_RESULT($ld_cv_decl_getopt_unistd_h)
241 if test $ld_cv_decl_getopt_unistd_h = yes; then
242 AC_DEFINE([HAVE_DECL_GETOPT], 1,
243 [Is the prototype for getopt in <unistd.h> in the expected format?])
248 AC_CHECK_DECLS([strstr, free, sbrk, getenv, environ])
250 # When converting linker scripts into strings for use in emulation
251 # files, use astring.sed if the compiler supports ANSI string
252 # concatenation, or ostring.sed otherwise. This is to support the
253 # broken Microsoft MSVC compiler, which limits the length of string
254 # constants, while still supporting pre-ANSI compilers which do not
255 # support string concatenation.
256 AC_MSG_CHECKING([whether ANSI C string concatenation works])
257 AC_CACHE_VAL(ld_cv_string_concatenation,
258 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [char *a = "a" "a";])],
259 ld_cv_string_concatenation=yes,
260 ld_cv_string_concatenation=no)])
261 AC_MSG_RESULT($ld_cv_string_concatenation)
262 if test "$ld_cv_string_concatenation" = "yes"; then
263 STRINGIFY=astring.sed
265 STRINGIFY=ostring.sed
269 # target-specific stuff:
277 dnl We need to get an arbitrary number of tdir definitions into
278 dnl Makefile. We can't do it using AC_SUBST, because autoconf does
279 dnl not permit literal newlines in an AC_SUBST variables. So we use a
283 # If the host is 64-bit, then we enable 64-bit targets by default.
284 # This is consistent with what ../bfd/configure.ac does.
285 if test x${want64} = xfalse; then
286 AC_CHECK_SIZEOF(void *)
287 if test "x${ac_cv_sizeof_void_p}" = "x8"; then
292 elf_list_options=FALSE
293 elf_shlib_list_options=FALSE
294 elf_plt_unwind_list_options=FALSE
295 for targ_alias in `echo $target_alias $enable_targets | sed 's/,/ /g'`
297 if test "$targ_alias" = "all"; then
299 elf_list_options=TRUE
300 elf_shlib_list_options=TRUE
301 elf_plt_unwind_list_options=TRUE
303 # Canonicalize the secondary target names.
304 result=`$ac_config_sub $targ_alias 2>/dev/null`
305 if test -n "$result"; then
311 . ${srcdir}/configure.tgt
313 if test "$targ" = "$target"; then
317 if test x${want64} = xfalse; then
318 . ${srcdir}/../bfd/config.bfd
321 if test x${want64} = xtrue; then
322 targ_extra_emuls="$targ_extra_emuls $targ64_extra_emuls"
323 targ_extra_libpath="$targ_extra_libpath $targ64_extra_libpath"
326 for i in $targ_emul $targ_extra_emuls $targ_extra_libpath; do
327 case " $all_emuls " in
330 all_emuls="$all_emuls e${i}.o"
331 eval result=\$tdir_$i
332 test -z "$result" && result=$targ_alias
333 echo tdir_$i=$result >> tdirs
336 elf_list_options=TRUE
339 if $GREP "TEMPLATE_NAME=elf32" ${srcdir}/emulparams/${i}.sh >/dev/null 2>/dev/null; then
340 elf_list_options=TRUE
344 if test "$elf_list_options" = "TRUE"; then
345 . ${srcdir}/emulparams/${i}.sh
346 if test x${GENERATE_SHLIB_SCRIPT} = xyes; then
347 elf_shlib_list_options=TRUE
349 if test x${PLT_UNWIND} = xyes; then
350 elf_plt_unwind_list_options=TRUE
357 for i in $targ_emul $targ_extra_libpath; do
358 case " $all_libpath " in
361 if test -z "$all_libpath"; then
364 all_libpath="$all_libpath ${i}"
370 for i in $targ_extra_ofiles; do
371 case " $all_emul_extras " in
374 all_emul_extras="$all_emul_extras ${i}"
382 if test x$ac_default_compressed_debug_sections = xyes ; then
383 AC_DEFINE(DEFAULT_FLAG_COMPRESS_DEBUG, 1, [Define if you want compressed debug sections by default.])
386 if test "${ac_default_ld_z_relro}" = unset; then
387 ac_default_ld_z_relro=0
389 AC_DEFINE_UNQUOTED(DEFAULT_LD_Z_RELRO,
390 $ac_default_ld_z_relro,
391 [Define to 1 if you want to enable -z relro in ELF linker by default.])
393 AC_SUBST(elf_list_options)
394 AC_SUBST(elf_shlib_list_options)
395 AC_SUBST(elf_plt_unwind_list_options)
401 if test x${all_targets} = xtrue; then
402 if test x${want64} = xtrue; then
403 EMULATION_OFILES='$(ALL_EMULATIONS) $(ALL_64_EMULATIONS)'
404 EMUL_EXTRA_OFILES='$(ALL_EMUL_EXTRA_OFILES) $(ALL_64_EMUL_EXTRA_OFILES)'
406 EMULATION_OFILES='$(ALL_EMULATIONS)'
407 EMUL_EXTRA_OFILES='$(ALL_EMUL_EXTRA_OFILES)'
410 EMULATION_OFILES=$all_emuls
411 EMUL_EXTRA_OFILES=$all_emul_extras
413 AC_SUBST(EMULATION_OFILES)
414 AC_SUBST(EMUL_EXTRA_OFILES)
417 EMULATION_LIBPATH=$all_libpath
418 AC_SUBST(EMULATION_LIBPATH)
420 if test x${enable_static} = xno; then
421 TESTBFDLIB="--rpath ../bfd/.libs ../bfd/.libs/libbfd.so"
423 TESTBFDLIB="../bfd/.libs/libbfd.a"
427 target_vendor=${target_vendor=$host_vendor}
428 case "$target_vendor" in
429 hp) EXTRA_SHLIB_EXTENSION=".sl" ;;
430 *) EXTRA_SHLIB_EXTENSION= ;;
434 lynxos) EXTRA_SHLIB_EXTENSION=".a" ;;
437 if test x${EXTRA_SHLIB_EXTENSION} != x ; then
438 AC_DEFINE_UNQUOTED(EXTRA_SHLIB_EXTENSION, "$EXTRA_SHLIB_EXTENSION",
439 [Additional extension a shared object might have.])
442 dnl Required by html, pdf, install-pdf and install-html
443 AC_SUBST(datarootdir)
448 AC_CONFIG_FILES(Makefile po/Makefile.in:po/Make-in)