1 dnl Process this file with autoconf to produce a configure script
3 dnl Copyright (C) 2012-2015 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)
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 ${got_handling} for --enable-got option) ;;
149 AC_CONFIG_HEADERS([config.h:config.in])
152 AH_VERBATIM([00_CONFIG_H_CHECK],
153 [/* Check that config.h is #included before system headers
154 (this works only for glibc, but that should be enough). */
155 #if defined(__GLIBC__) && !defined(__FreeBSD_kernel__) && !defined(__CONFIG_H__)
156 # error config.h must be #included before system headers
158 #define __CONFIG_H__ 1])
160 if test -z "$target" ; then
161 AC_MSG_ERROR(Unrecognized target system type; please check config.sub.)
163 if test -z "$host" ; then
164 AC_MSG_ERROR(Unrecognized host system type; please check config.sub.)
167 # host-specific stuff:
169 ALL_LINGUAS="fr sv tr es da vi zh_CN zh_TW ga fi id bg it uk"
170 ZW_GNU_GETTEXT_SISTER_DIR
179 AM_CONDITIONAL(GENINSRC_NEVER, false)
180 ACX_PROG_CMP_IGNORE_INITIAL
182 . ${srcdir}/configure.host
185 AC_SUBST(HOSTING_CRT0)
186 AC_SUBST(HOSTING_SCRT0)
187 AC_SUBST(HOSTING_LIBS)
188 AC_SUBST(HOSTING_SLIBS)
189 AC_SUBST(NATIVE_LIB_DIRS)
191 AC_CHECK_HEADERS(string.h strings.h stdlib.h unistd.h elf-hints.h limits.h locale.h sys/param.h)
192 AC_CHECK_HEADERS(fcntl.h sys/file.h sys/time.h sys/stat.h)
194 AC_CHECK_FUNCS(glob mkstemp realpath sbrk setlocale waitpid)
195 AC_CHECK_FUNCS(open lseek close)
198 dnl AC_CHECK_HEADERS(sys/mman.h)
201 AC_SEARCH_LIBS([dlopen], [dl])
202 AM_CONDITIONAL([ENABLE_PLUGINS], [test x$plugins = xyes])
204 AC_ARG_ENABLE(initfini-array,
205 [ --enable-initfini-array use .init_array/.fini_array sections],
207 AC_CACHE_CHECK(for .preinit_array/.init_array/.fini_array support,
208 gcc_cv_initfini_array, [dnl
209 if test "x${build}" = "x${target}" ; then
210 AC_RUN_IFELSE([AC_LANG_SOURCE([
212 int main (void) { return x; }
213 int foo (void) { x = 0; }
214 int (*fp) (void) __attribute__ ((section (".init_array"))) = foo;])],
215 [gcc_cv_initfini_array=yes], [gcc_cv_initfini_array=no],
216 [gcc_cv_initfini_array=no])
218 gcc_cv_initfini_array=no
220 enable_initfini_array=$gcc_cv_initfini_array
222 AC_SUBST(enable_initfini_array)
223 if test $enable_initfini_array = yes; then
224 AC_DEFINE(HAVE_INITFINI_ARRAY, 1,
225 [Define .init_array/.fini_array sections are available and working.])
228 AC_MSG_CHECKING(for a known getopt prototype in unistd.h)
229 AC_CACHE_VAL(ld_cv_decl_getopt_unistd_h,
230 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <unistd.h>], [extern int getopt (int, char *const*, const char *);])],
231 ld_cv_decl_getopt_unistd_h=yes, ld_cv_decl_getopt_unistd_h=no)])
232 AC_MSG_RESULT($ld_cv_decl_getopt_unistd_h)
233 if test $ld_cv_decl_getopt_unistd_h = yes; then
234 AC_DEFINE([HAVE_DECL_GETOPT], 1,
235 [Is the prototype for getopt in <unistd.h> in the expected format?])
240 AC_CHECK_DECLS([strstr, free, sbrk, getenv, environ])
242 # When converting linker scripts into strings for use in emulation
243 # files, use astring.sed if the compiler supports ANSI string
244 # concatenation, or ostring.sed otherwise. This is to support the
245 # broken Microsoft MSVC compiler, which limits the length of string
246 # constants, while still supporting pre-ANSI compilers which do not
247 # support string concatenation.
248 AC_MSG_CHECKING([whether ANSI C string concatenation works])
249 AC_CACHE_VAL(ld_cv_string_concatenation,
250 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [char *a = "a" "a";])],
251 ld_cv_string_concatenation=yes,
252 ld_cv_string_concatenation=no)])
253 AC_MSG_RESULT($ld_cv_string_concatenation)
254 if test "$ld_cv_string_concatenation" = "yes"; then
255 STRINGIFY=astring.sed
257 STRINGIFY=ostring.sed
261 # target-specific stuff:
269 dnl We need to get an arbitrary number of tdir definitions into
270 dnl Makefile. We can't do it using AC_SUBST, because autoconf does
271 dnl not permit literal newlines in an AC_SUBST variables. So we use a
275 # If the host is 64-bit, then we enable 64-bit targets by default.
276 # This is consistent with what ../bfd/configure.ac does.
277 if test x${want64} = xfalse; then
278 AC_CHECK_SIZEOF(void *)
279 if test "x${ac_cv_sizeof_void_p}" = "x8"; then
284 elf_list_options=FALSE
285 elf_shlib_list_options=FALSE
286 elf_plt_unwind_list_options=FALSE
287 for targ_alias in `echo $target_alias $enable_targets | sed 's/,/ /g'`
289 if test "$targ_alias" = "all"; then
292 # Canonicalize the secondary target names.
293 result=`$ac_config_sub $targ_alias 2>/dev/null`
294 if test -n "$result"; then
300 . ${srcdir}/configure.tgt
302 if test "$targ" = "$target"; then
306 if test x${want64} = xfalse; then
307 . ${srcdir}/../bfd/config.bfd
310 if test x${want64} = xtrue; then
311 targ_extra_emuls="$targ_extra_emuls $targ64_extra_emuls"
312 targ_extra_libpath="$targ_extra_libpath $targ64_extra_libpath"
315 for i in $targ_emul $targ_extra_emuls $targ_extra_libpath; do
316 case " $all_emuls " in
320 elf_list_options=TRUE
321 . ${srcdir}/emulparams/${i}.sh
322 if test x${GENERATE_SHLIB_SCRIPT} = xyes; then
323 elf_shlib_list_options=TRUE
325 if test x${PLT_UNWIND} = xyes; then
326 elf_plt_unwind_list_options=TRUE
332 all_emuls="$all_emuls e${i}.o"
333 eval result=\$tdir_$i
334 test -z "$result" && result=$targ_alias
335 echo tdir_$i=$result >> tdirs
340 for i in $targ_emul $targ_extra_libpath; do
341 case " $all_libpath " in
344 if test -z "$all_libpath"; then
347 all_libpath="$all_libpath ${i}"
353 for i in $targ_extra_ofiles; do
354 case " $all_emul_extras " in
357 all_emul_extras="$all_emul_extras ${i}"
365 AC_SUBST(elf_list_options)
366 AC_SUBST(elf_shlib_list_options)
367 AC_SUBST(elf_plt_unwind_list_options)
373 if test x${all_targets} = xtrue; then
374 if test x${want64} = xtrue; then
375 EMULATION_OFILES='$(ALL_EMULATIONS) $(ALL_64_EMULATIONS)'
376 EMUL_EXTRA_OFILES='$(ALL_EMUL_EXTRA_OFILES) $(ALL_64_EMUL_EXTRA_OFILES)'
378 EMULATION_OFILES='$(ALL_EMULATIONS)'
379 EMUL_EXTRA_OFILES='$(ALL_EMUL_EXTRA_OFILES)'
382 EMULATION_OFILES=$all_emuls
383 EMUL_EXTRA_OFILES=$all_emul_extras
385 AC_SUBST(EMULATION_OFILES)
386 AC_SUBST(EMUL_EXTRA_OFILES)
389 EMULATION_LIBPATH=$all_libpath
390 AC_SUBST(EMULATION_LIBPATH)
392 if test x${enable_static} = xno; then
393 TESTBFDLIB="--rpath ../bfd/.libs ../bfd/.libs/libbfd.so"
395 TESTBFDLIB="../bfd/.libs/libbfd.a"
399 target_vendor=${target_vendor=$host_vendor}
400 case "$target_vendor" in
401 hp) EXTRA_SHLIB_EXTENSION=".sl" ;;
402 *) EXTRA_SHLIB_EXTENSION= ;;
406 lynxos) EXTRA_SHLIB_EXTENSION=".a" ;;
409 if test x${EXTRA_SHLIB_EXTENSION} != x ; then
410 AC_DEFINE_UNQUOTED(EXTRA_SHLIB_EXTENSION, "$EXTRA_SHLIB_EXTENSION",
411 [Additional extension a shared object might have.])
414 dnl Required by html, pdf, install-pdf and install-html
415 AC_SUBST(datarootdir)
420 AC_CONFIG_FILES(Makefile po/Makefile.in:po/Make-in)