1 dnl Process this file with autoconf to produce a configure script
3 dnl Copyright (C) 2012-2014 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 . ${srcdir}/configure.host
185 AC_SUBST(HOSTING_CRT0)
186 AC_SUBST(HOSTING_SCRT0)
187 AC_SUBST(HOSTING_LIBS)
188 AC_SUBST(HOSTING_SLIBS)
189 AC_SUBST(NATIVE_LIB_DIRS)
191 AC_CHECK_HEADERS(string.h strings.h stdlib.h unistd.h elf-hints.h limits.h locale.h sys/param.h)
192 AC_CHECK_HEADERS(fcntl.h sys/file.h sys/time.h sys/stat.h)
194 AC_CHECK_FUNCS(glob mkstemp realpath sbrk setlocale waitpid)
195 AC_CHECK_FUNCS(open lseek close)
198 AC_SEARCH_LIBS([dlopen], [dl])
199 AM_CONDITIONAL([ENABLE_PLUGINS], [test x$plugins = xyes])
201 AC_ARG_ENABLE(initfini-array,
202 [ --enable-initfini-array use .init_array/.fini_array sections],
204 AC_CACHE_CHECK(for .preinit_array/.init_array/.fini_array support,
205 gcc_cv_initfini_array, [dnl
206 if test "x${build}" = "x${target}" ; then
207 AC_RUN_IFELSE([AC_LANG_SOURCE([
209 int main (void) { return x; }
210 int foo (void) { x = 0; }
211 int (*fp) (void) __attribute__ ((section (".init_array"))) = foo;])],
212 [gcc_cv_initfini_array=yes], [gcc_cv_initfini_array=no],
213 [gcc_cv_initfini_array=no])
215 gcc_cv_initfini_array=no
217 enable_initfini_array=$gcc_cv_initfini_array
219 AC_SUBST(enable_initfini_array)
220 if test $enable_initfini_array = yes; then
221 AC_DEFINE(HAVE_INITFINI_ARRAY, 1,
222 [Define .init_array/.fini_array sections are available and working.])
225 AC_MSG_CHECKING(for a known getopt prototype in unistd.h)
226 AC_CACHE_VAL(ld_cv_decl_getopt_unistd_h,
227 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <unistd.h>], [extern int getopt (int, char *const*, const char *);])],
228 ld_cv_decl_getopt_unistd_h=yes, ld_cv_decl_getopt_unistd_h=no)])
229 AC_MSG_RESULT($ld_cv_decl_getopt_unistd_h)
230 if test $ld_cv_decl_getopt_unistd_h = yes; then
231 AC_DEFINE([HAVE_DECL_GETOPT], 1,
232 [Is the prototype for getopt in <unistd.h> in the expected format?])
237 AC_CHECK_DECLS([strstr, free, sbrk, getenv, environ])
239 # Link in zlib if we can. This is needed only for the bootstrap tests
240 # right now, since those tests use libbfd, which depends on zlib.
243 # When converting linker scripts into strings for use in emulation
244 # files, use astring.sed if the compiler supports ANSI string
245 # concatenation, or ostring.sed otherwise. This is to support the
246 # broken Microsoft MSVC compiler, which limits the length of string
247 # constants, while still supporting pre-ANSI compilers which do not
248 # support string concatenation.
249 AC_MSG_CHECKING([whether ANSI C string concatenation works])
250 AC_CACHE_VAL(ld_cv_string_concatenation,
251 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [char *a = "a" "a";])],
252 ld_cv_string_concatenation=yes,
253 ld_cv_string_concatenation=no)])
254 AC_MSG_RESULT($ld_cv_string_concatenation)
255 if test "$ld_cv_string_concatenation" = "yes"; then
256 STRINGIFY=astring.sed
258 STRINGIFY=ostring.sed
262 # target-specific stuff:
270 dnl We need to get an arbitrary number of tdir definitions into
271 dnl Makefile. We can't do it using AC_SUBST, because autoconf does
272 dnl not permit literal newlines in an AC_SUBST variables. So we use a
276 # If the host is 64-bit, then we enable 64-bit targets by default.
277 # This is consistent with what ../bfd/configure.ac does.
278 if test x${want64} = xfalse; then
279 AC_CHECK_SIZEOF(void *)
280 if test "x${ac_cv_sizeof_void_p}" = "x8"; then
285 for targ_alias in `echo $target_alias $enable_targets | sed 's/,/ /g'`
287 if test "$targ_alias" = "all"; then
290 # Canonicalize the secondary target names.
291 result=`$ac_config_sub $targ_alias 2>/dev/null`
292 if test -n "$result"; then
298 . ${srcdir}/configure.tgt
300 if test "$targ" = "$target"; then
304 if test x${want64} = xfalse; then
305 . ${srcdir}/../bfd/config.bfd
308 if test x${want64} = xtrue; then
309 targ_extra_emuls="$targ_extra_emuls $targ64_extra_emuls"
310 targ_extra_libpath="$targ_extra_libpath $targ64_extra_libpath"
313 for i in $targ_emul $targ_extra_emuls $targ_extra_libpath; do
314 case " $all_emuls " in
317 all_emuls="$all_emuls e${i}.o"
318 eval result=\$tdir_$i
319 test -z "$result" && result=$targ_alias
320 echo tdir_$i=$result >> tdirs
325 for i in $targ_emul $targ_extra_libpath; do
326 case " $all_libpath " in
329 if test -z "$all_libpath"; then
332 all_libpath="$all_libpath ${i}"
338 for i in $targ_extra_ofiles; do
339 case " $all_emul_extras " in
342 all_emul_extras="$all_emul_extras ${i}"
355 if test x${all_targets} = xtrue; then
356 if test x${want64} = xtrue; then
357 EMULATION_OFILES='$(ALL_EMULATIONS) $(ALL_64_EMULATIONS)'
358 EMUL_EXTRA_OFILES='$(ALL_EMUL_EXTRA_OFILES) $(ALL_64_EMUL_EXTRA_OFILES)'
360 EMULATION_OFILES='$(ALL_EMULATIONS)'
361 EMUL_EXTRA_OFILES='$(ALL_EMUL_EXTRA_OFILES)'
364 EMULATION_OFILES=$all_emuls
365 EMUL_EXTRA_OFILES=$all_emul_extras
367 AC_SUBST(EMULATION_OFILES)
368 AC_SUBST(EMUL_EXTRA_OFILES)
371 EMULATION_LIBPATH=$all_libpath
372 AC_SUBST(EMULATION_LIBPATH)
374 if test x${enable_static} = xno; then
375 TESTBFDLIB="--rpath ../bfd/.libs ../bfd/.libs/libbfd.so"
377 TESTBFDLIB="../bfd/.libs/libbfd.a"
381 target_vendor=${target_vendor=$host_vendor}
382 case "$target_vendor" in
383 hp) EXTRA_SHLIB_EXTENSION=".sl" ;;
384 *) EXTRA_SHLIB_EXTENSION= ;;
388 lynxos) EXTRA_SHLIB_EXTENSION=".a" ;;
391 if test x${EXTRA_SHLIB_EXTENSION} != x ; then
392 AC_DEFINE_UNQUOTED(EXTRA_SHLIB_EXTENSION, "$EXTRA_SHLIB_EXTENSION",
393 [Additional extension a shared object might have.])
396 dnl Required by html, pdf, install-pdf and install-html
397 AC_SUBST(datarootdir)
402 AC_CONFIG_FILES(Makefile po/Makefile.in:po/Make-in)