binutils-gdb/ld/configure.ac
Nick Alcock 87279e3cef libctf: installable libctf as a shared library
This lets other programs read and write CTF-format data.

Two versioned shared libraries are created: libctf.so and
libctf-nobfd.so.  They contain identical content except that
libctf-nobfd.so contains no references to libbfd and does not implement
ctf_open, ctf_fdopen, ctf_bfdopen or ctf_bfdopen_ctfsect, so it can be
used by programs that cannot use BFD, like readelf.

The soname major version is presently .0 until the linker API
stabilizes, when it will flip to .1 and hopefully never change again.

New in v3.
v4: libtoolize and turn into a pair of shared libraries.  Drop
    --enable-install-ctf: now controlled by --enable-shared and
    --enable-install-libbfd, like everything else.
v5: Add ../bfd to ACLOCAL_AMFLAGS and AC_CONFIG_MACRO_DIR.  Fix tabdamage.

	* Makefile.def (host_modules): libctf is no longer no_install.
	* Makefile.in: Regenerated.
libctf/
	* configure.ac (AC_DISABLE_SHARED): New, like opcodes/.
	(LT_INIT): Likewise.
	(AM_INSTALL_LIBBFD): Likewise.
	(dlopen): Note why this is necessary in a comment.
	(SHARED_LIBADD): Initialize for possibly-PIC libiberty: derived from
	opcodes/.
	(SHARED_LDFLAGS): Likewise.
	(BFD_LIBADD): Likewise, for libbfd.
	(BFD_DEPENDENCIES): Likewise.
	(VERSION_FLAGS): Initialize, using a version script if ld supports
	one, or libtool -export-symbols-regex otherwise.
	(AC_CONFIG_MACRO_DIR): Add ../BFD.
	* Makefile.am (ACLOCAL_AMFLAGS): Likewise.
	(INCDIR): New.
	(AM_CPPFLAGS): Use $(srcdir), not $(top_srcdir).
	(noinst_LIBRARIES): Replace with...
	[INSTALL_LIBBFD] (lib_LTLIBRARIES): This, or...
	[!INSTALL_LIBBFD] (noinst_LTLIBRARIES): ... this, mentioning new
	libctf-nobfd.la as well.
	[INSTALL_LIBCTF] (include_HEADERS): Add the CTF headers.
	[!INSTALL_LIBCTF] (include_HEADERS): New, empty.
	(libctf_a_SOURCES): Rename to...
	(libctf_nobfd_la_SOURCES): ... this, all of libctf other than
	ctf-open-bfd.c.
	(libctf_la_SOURCES): Now derived from libctf_nobfd_la_SOURCES,
	with ctf-open-bfd.c added.
	(libctf_nobfd_la_LIBADD): New, using @SHARED_LIBADD@.
	(libctf_la_LIBADD): New, using @BFD_LIBADD@ as well.
	(libctf_la_DEPENDENCIES): New, using @BFD_DEPENDENCIES@.
	* Makefile.am [INSTALL_LIBCTF]: Use it.
	* aclocal.m4: Add ../bfd/acinclude.m4, ../config/acx.m4, and the
	libtool macros.
	* libctf.ver: New, everything is version LIBCTF_1.0 currently (even
	the unstable components).
	* Makefile.in: Regenerated.
	* config.h.in: Likewise.
	* configure: Likewise.
binutils/
	* Makefile.am (LIBCTF): Mention the .la file.
	(LIBCTF_NOBFD): New.
	(readelf_DEPENDENCIES): Use it.
	(readelf_LDADD): Likewise.
	* Makefile.in: Regenerated.
ld/
	* configure.ac (TESTCTFLIB): Set to the .so or .a, like TESTBFDLIB.
	* Makefile.am (TESTCTFLIB): Use it.
	(LIBCTF): Use the .la file.
	(check-DEJAGNU): Use it.
	* Makefile.in: Regenerated.
	* configure: Likewise.
include/
	* ctf-api.h: Note the instability of the ctf_link interfaces.
2019-10-03 17:04:56 +01:00

545 lines
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dnl Process this file with autoconf to produce a configure script
dnl
dnl Copyright (C) 2012-2019 Free Software Foundation, Inc.
dnl
dnl This file is free software; you can redistribute it and/or modify
dnl it under the terms of the GNU General Public License as published by
dnl the Free Software Foundation; either version 3 of the License, or
dnl (at your option) any later version.
dnl
dnl This program is distributed in the hope that it will be useful,
dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
dnl GNU General Public License for more details.
dnl
dnl You should have received a copy of the GNU General Public License
dnl along with this program; see the file COPYING3. If not see
dnl <http://www.gnu.org/licenses/>.
dnl
m4_include([../bfd/version.m4])
AC_INIT([ld], BFD_VERSION)
AC_CONFIG_SRCDIR(ldmain.c)
AC_CANONICAL_TARGET
AC_CANONICAL_BUILD
AC_ISC_POSIX
AM_INIT_AUTOMAKE
AM_MAINTAINER_MODE
AC_PROG_CC
AC_PROG_CXX
AC_PROG_GREP
AC_GNU_SOURCE
AC_USE_SYSTEM_EXTENSIONS
AC_PROG_INSTALL
LT_INIT
ACX_LARGEFILE
AC_ARG_WITH(lib-path, [ --with-lib-path=dir1:dir2... set default LIB_PATH],LIB_PATH=$withval)
AC_ARG_ENABLE(targets,
[ --enable-targets alternative target configurations],
[case "${enableval}" in
yes | "") AC_MSG_ERROR(enable-targets option must specify target names or 'all')
;;
no) enable_targets= ;;
*) enable_targets=$enableval ;;
esac])dnl
AC_ARG_ENABLE(64-bit-bfd,
[ --enable-64-bit-bfd 64-bit support (on hosts with narrower word sizes)],
[case "${enableval}" in
yes) want64=true ;;
no) want64=false ;;
*) AC_MSG_ERROR(bad value ${enableval} for 64-bit-bfd option) ;;
esac],[want64=false])dnl
AC_ARG_WITH(sysroot,
[ --with-sysroot[=DIR] Search for usr/lib et al within DIR.],
[
case ${with_sysroot} in
yes) TARGET_SYSTEM_ROOT='${exec_prefix}/${target_alias}/sys-root' ;;
*) TARGET_SYSTEM_ROOT=$with_sysroot ;;
esac
TARGET_SYSTEM_ROOT_DEFINE='-DTARGET_SYSTEM_ROOT=\"$(TARGET_SYSTEM_ROOT)\"'
use_sysroot=yes
if test "x$prefix" = xNONE; then
test_prefix=/usr/local
else
test_prefix=$prefix
fi
if test "x$exec_prefix" = xNONE; then
test_exec_prefix=$test_prefix
else
test_exec_prefix=$exec_prefix
fi
case ${TARGET_SYSTEM_ROOT} in
"${test_prefix}"|"${test_prefix}/"*|\
"${test_exec_prefix}"|"${test_exec_prefix}/"*|\
'${prefix}'|'${prefix}/'*|\
'${exec_prefix}'|'${exec_prefix}/'*)
t="$TARGET_SYSTEM_ROOT_DEFINE -DTARGET_SYSTEM_ROOT_RELOCATABLE"
TARGET_SYSTEM_ROOT_DEFINE="$t"
;;
esac
], [
use_sysroot=no
TARGET_SYSTEM_ROOT=
TARGET_SYSTEM_ROOT_DEFINE='-DTARGET_SYSTEM_ROOT=\"\"'
])
AC_SUBST(use_sysroot)
AC_SUBST(TARGET_SYSTEM_ROOT)
AC_SUBST(TARGET_SYSTEM_ROOT_DEFINE)
dnl Use --enable-gold to decide if this linker should be the default.
dnl "install_as_default" is set to false if gold is the default linker.
dnl "installed_linker" is the installed BFD linker name.
AC_ARG_ENABLE(gold,
[[ --enable-gold[=ARG] build gold [ARG={default,yes,no}]]],
[case "${enableval}" in
default)
install_as_default=no
installed_linker=ld.bfd
;;
yes|no)
install_as_default=yes
installed_linker=ld.bfd
;;
*)
AC_MSG_ERROR([invalid --enable-gold argument])
;;
esac],
[install_as_default=yes
installed_linker=ld.bfd])
AC_SUBST(install_as_default)
AC_SUBST(installed_linker)
AC_ARG_ENABLE([got],
AS_HELP_STRING([--enable-got=<type>],
[GOT handling scheme (target, single, negative, multigot)]),
[case "${enableval}" in
target | single | negative | multigot) got_handling=$enableval ;;
*) AC_MSG_ERROR(bad value ${enableval} for --enable-got option) ;;
esac],
[got_handling=target])
case "${got_handling}" in
target)
AC_DEFINE([GOT_HANDLING_DEFAULT], [GOT_HANDLING_TARGET_DEFAULT],
[Define to choose default GOT handling scheme]) ;;
single)
AC_DEFINE([GOT_HANDLING_DEFAULT], [GOT_HANDLING_SINGLE],
[Define to choose default GOT handling scheme]) ;;
negative)
AC_DEFINE([GOT_HANDLING_DEFAULT], [GOT_HANDLING_NEGATIVE],
[Define to choose default GOT handling scheme]) ;;
multigot)
AC_DEFINE([GOT_HANDLING_DEFAULT], [GOT_HANDLING_MULTIGOT],
[Define to choose default GOT handling scheme]) ;;
*) AC_MSG_ERROR(bad value ${got_handling} for --enable-got option) ;;
esac
# PR gas/19109
# Decide the default method for compressing debug sections.
ac_default_compressed_debug_sections=unset
# Provide a configure time option to override our default.
AC_ARG_ENABLE(compressed_debug_sections,
AS_HELP_STRING([--enable-compressed-debug-sections={all,ld,none}],
[compress debug sections by default])],
[case ,"${enableval}", in
,yes, | ,all, | *,ld,*) ac_default_compressed_debug_sections=yes ;;
,no, | ,none,) ac_default_compressed_debug_sections=no ;;
esac])dnl
# Decide setting DT_RUNPATH instead of DT_RPATH by default
ac_default_new_dtags=unset
# Provide a configure time option to override our default.
AC_ARG_ENABLE(new_dtags,
AS_HELP_STRING([--enable-new-dtags],
[set DT_RUNPATH instead of DT_RPATH by default])],
[case "${enableval}" in
yes) ac_default_new_dtags=1 ;;
no) ac_default_new_dtags=0 ;;
esac])dnl
# Decide if -z relro should be enabled in ELF linker by default.
ac_default_ld_z_relro=unset
# Provide a configure time option to override our default.
AC_ARG_ENABLE(relro,
AS_HELP_STRING([--enable-relro],
[enable -z relro in ELF linker by default]),
[case "${enableval}" in
yes) ac_default_ld_z_relro=1 ;;
no) ac_default_ld_z_relro=0 ;;
esac])dnl
# Decide if -z separate-code should be enabled in ELF linker by default.
ac_default_ld_z_separate_code=unset
AC_ARG_ENABLE(separate-code,
AS_HELP_STRING([--enable-separate-code],
[enable -z separate-code in ELF linker by default]),
[case "${enableval}" in
yes) ac_default_ld_z_separate_code=1 ;;
no) ac_default_ld_z_separate_code=0 ;;
esac])
# Decide which "--hash-style" to use by default
# Provide a configure time option to override our default.
AC_ARG_ENABLE([default-hash-style],
AS_HELP_STRING([--enable-default-hash-style={sysv,gnu,both}],
[use this default hash style]),
[case "${enable_default_hash_style}" in
sysv | gnu | both) ;;
*) AC_MSG_ERROR([bad value ${enable_default_hash_style} for enable-default-hash-style option]) ;;
esac],
[case "${target}" in
# Enable gnu hash only on GNU targets, but not mips
mips*-*-*) enable_default_hash_style=sysv ;;
*-*-gnu* | *-*-linux* | *-*-nacl*) enable_default_hash_style=both ;;
*) enable_default_hash_style=sysv ;;
esac])
case "${enable_default_hash_style}" in
sysv | both) ac_default_emit_sysv_hash=1 ;;
*) ac_default_emit_sysv_hash=0 ;;
esac
case "${enable_default_hash_style}" in
gnu | both) ac_default_emit_gnu_hash=1 ;;
*) ac_default_emit_gnu_hash=0 ;;
esac
AM_BINUTILS_WARNINGS
AM_LC_MESSAGES
AC_CONFIG_HEADERS([config.h:config.in])
# PR 14072
AH_VERBATIM([00_CONFIG_H_CHECK],
[/* Check that config.h is #included before system headers
(this works only for glibc, but that should be enough). */
#if defined(__GLIBC__) && !defined(__FreeBSD_kernel__) && !defined(__CONFIG_H__)
# error config.h must be #included before system headers
#endif
#define __CONFIG_H__ 1])
if test -z "$target" ; then
AC_MSG_ERROR(Unrecognized target system type; please check config.sub.)
fi
if test -z "$host" ; then
AC_MSG_ERROR(Unrecognized host system type; please check config.sub.)
fi
# host-specific stuff:
ALL_LINGUAS="bg da de es fi fr ga id it ja pt_BR ru sr sv tr uk vi zh_CN zh_TW"
ZW_GNU_GETTEXT_SISTER_DIR
AM_PO_SUBDIRS
AC_EXEEXT
AC_PROG_YACC
AM_PROG_LEX
AM_MAINTAINER_MODE
AM_CONDITIONAL(GENINSRC_NEVER, false)
ACX_PROG_CMP_IGNORE_INITIAL
. ${srcdir}/configure.host
AC_SUBST(HDEFINES)
AC_SUBST(NATIVE_LIB_DIRS)
AC_CHECK_HEADERS(string.h strings.h stdlib.h unistd.h elf-hints.h limits.h locale.h sys/param.h)
AC_CHECK_HEADERS(fcntl.h sys/file.h sys/time.h sys/stat.h)
ACX_HEADER_STRING
AC_CHECK_FUNCS(glob mkstemp realpath sbrk setlocale waitpid)
AC_CHECK_FUNCS(open lseek close)
AC_HEADER_DIRENT
dnl AC_CHECK_HEADERS(sys/mman.h)
AC_FUNC_MMAP
AC_SEARCH_LIBS([dlopen], [dl])
AM_CONDITIONAL([ENABLE_PLUGINS], [test x$plugins = xyes])
AC_ARG_ENABLE(initfini-array,
[ --disable-initfini-array do not use .init_array/.fini_array sections],
[case "${enableval}" in
yes|no) ;;
*) AC_MSG_ERROR([invalid --enable-initfini-array argument]) ;;
esac], [enable_initfini_array=yes])
AC_SUBST(enable_initfini_array)
if test $enable_initfini_array = yes; then
AC_DEFINE(HAVE_INITFINI_ARRAY, 1,
[Define .init_array/.fini_array sections are available and working.])
fi
AC_MSG_CHECKING(for a known getopt prototype in unistd.h)
AC_CACHE_VAL(ld_cv_decl_getopt_unistd_h,
[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <unistd.h>], [extern int getopt (int, char *const*, const char *);])],
ld_cv_decl_getopt_unistd_h=yes, ld_cv_decl_getopt_unistd_h=no)])
AC_MSG_RESULT($ld_cv_decl_getopt_unistd_h)
if test $ld_cv_decl_getopt_unistd_h = yes; then
AC_DEFINE([HAVE_DECL_GETOPT], 1,
[Is the prototype for getopt in <unistd.h> in the expected format?])
fi
BFD_BINARY_FOPEN
AC_CHECK_DECLS([strstr, free, sbrk, getenv, environ])
# Link in zlib if we can. This allows us to read and write
# compressed CTF sections.
AM_ZLIB
# When converting linker scripts into strings for use in emulation
# files, use astring.sed if the compiler supports ANSI string
# concatenation, or ostring.sed otherwise. This is to support the
# broken Microsoft MSVC compiler, which limits the length of string
# constants, while still supporting pre-ANSI compilers which do not
# support string concatenation.
AC_MSG_CHECKING([whether ANSI C string concatenation works])
AC_CACHE_VAL(ld_cv_string_concatenation,
[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [char *a = "a" "a";])],
ld_cv_string_concatenation=yes,
ld_cv_string_concatenation=no)])
AC_MSG_RESULT($ld_cv_string_concatenation)
if test "$ld_cv_string_concatenation" = "yes"; then
STRINGIFY=astring.sed
else
STRINGIFY=ostring.sed
fi
AC_SUBST(STRINGIFY)
# target-specific stuff:
all_targets=
EMUL=
all_emuls=
all_emul_extras=
all_libpath=
TDIRS=
# If the host is 64-bit, then we enable 64-bit targets by default.
# This is consistent with what ../bfd/configure.ac does.
if test x${want64} = xfalse; then
AC_CHECK_SIZEOF(void *)
if test "x${ac_cv_sizeof_void_p}" = "x8"; then
want64=true
fi
fi
elf_list_options=FALSE
elf_shlib_list_options=FALSE
elf_plt_unwind_list_options=FALSE
for targ_alias in `echo $target_alias $enable_targets | sed 's/,/ /g'`
do
if test "$targ_alias" = "all"; then
all_targets=true
elf_list_options=TRUE
elf_shlib_list_options=TRUE
elf_plt_unwind_list_options=TRUE
else
# Canonicalize the secondary target names.
result=`$ac_config_sub $targ_alias 2>/dev/null`
if test -n "$result"; then
targ=$result
else
targ=$targ_alias
fi
. ${srcdir}/configure.tgt
if test "$targ" = "$target"; then
EMUL=$targ_emul
fi
if test x${want64} = xfalse; then
. ${srcdir}/../bfd/config.bfd
fi
if test x${want64} = xtrue; then
targ_extra_emuls="$targ_extra_emuls $targ64_extra_emuls"
targ_extra_libpath="$targ_extra_libpath $targ64_extra_libpath"
fi
for i in $targ_emul $targ_extra_emuls $targ_extra_libpath; do
case " $all_emuls " in
*" e${i}.o "*) ;;
*)
all_emuls="$all_emuls e${i}.o"
eval result=\$tdir_$i
test -z "$result" && result=$targ_alias
TDIRS="$TDIRS
tdir_$i=$result"
case "${i}" in
*elf*)
elf_list_options=TRUE
;;
*)
if $GREP "TEMPLATE_NAME=elf" ${srcdir}/emulparams/${i}.sh >/dev/null 2>/dev/null; then
elf_list_options=TRUE
fi
;;
esac
if test "$elf_list_options" = "TRUE"; then
source_sh()
{
. $1
}
source_sh ${srcdir}/emulparams/${i}.sh
if test x${GENERATE_SHLIB_SCRIPT} = xyes; then
elf_shlib_list_options=TRUE
fi
if test x${PLT_UNWIND} = xyes; then
elf_plt_unwind_list_options=TRUE
fi
fi
;;
esac
done
for i in $targ_emul $targ_extra_libpath; do
case " $all_libpath " in
*" ${i} "*) ;;
*)
if test -z "$all_libpath"; then
all_libpath=${i}
else
all_libpath="$all_libpath ${i}"
fi
;;
esac
done
for i in $targ_extra_ofiles; do
case " $all_emul_extras " in
*" ${i} "*) ;;
*)
all_emul_extras="$all_emul_extras ${i}"
;;
esac
done
fi
done
if test x$ac_default_compressed_debug_sections = xyes ; then
AC_DEFINE(DEFAULT_FLAG_COMPRESS_DEBUG, 1, [Define if you want compressed debug sections by default.])
fi
if test "${ac_default_new_dtags}" = unset; then
ac_default_new_dtags=0
fi
AC_DEFINE_UNQUOTED(DEFAULT_NEW_DTAGS,
$ac_default_new_dtags,
[Define to 1 if you want to set DT_RUNPATH instead of DT_RPATH by default.])
if test "${ac_default_ld_z_relro}" = unset; then
ac_default_ld_z_relro=0
fi
AC_DEFINE_UNQUOTED(DEFAULT_LD_Z_RELRO,
$ac_default_ld_z_relro,
[Define to 1 if you want to enable -z relro in ELF linker by default.])
if test "${ac_default_ld_z_separate_code}" = unset; then
ac_default_ld_z_separate_code=0
fi
AC_DEFINE_UNQUOTED(DEFAULT_LD_Z_SEPARATE_CODE,
$ac_default_ld_z_separate_code,
[Define to 1 if you want to enable -z separate-code in ELF linker by default.])
AC_DEFINE_UNQUOTED([DEFAULT_EMIT_SYSV_HASH],
[$ac_default_emit_sysv_hash],
[Define to 1 if you want to emit sysv hash in the ELF linker by default.])
AC_DEFINE_UNQUOTED([DEFAULT_EMIT_GNU_HASH],
[$ac_default_emit_gnu_hash],
[Define to 1 if you want to emit gnu hash in the ELF linker by default.])
AC_SUBST(elf_list_options)
AC_SUBST(elf_shlib_list_options)
AC_SUBST(elf_plt_unwind_list_options)
AC_SUBST(EMUL)
AC_SUBST(TDIRS)
AM_SUBST_NOTMAKE(TDIRS)
if test x${all_targets} = xtrue; then
if test x${want64} = xtrue; then
EMULATION_OFILES='$(ALL_EMULATIONS) $(ALL_64_EMULATIONS)'
EMUL_EXTRA_OFILES='$(ALL_EMUL_EXTRA_OFILES) $(ALL_64_EMUL_EXTRA_OFILES)'
else
EMULATION_OFILES='$(ALL_EMULATIONS)'
EMUL_EXTRA_OFILES='$(ALL_EMUL_EXTRA_OFILES)'
fi
else
EMULATION_OFILES=$all_emuls
EMUL_EXTRA_OFILES=$all_emul_extras
fi
AC_SUBST(EMULATION_OFILES)
AC_SUBST(EMUL_EXTRA_OFILES)
AC_SUBST(LIB_PATH)
EMULATION_LIBPATH=$all_libpath
AC_SUBST(EMULATION_LIBPATH)
if test x${enable_static} = xno; then
TESTBFDLIB="-Wl,--rpath,../bfd/.libs ../bfd/.libs/libbfd.so"
TESTCTFLIB="-Wl,--rpath,../libctf/.libs ../libctf/.libs/libctf.so"
else
TESTBFDLIB="../bfd/.libs/libbfd.a"
TESTCTFLIB="../libctf/.libs/libctf.a"
fi
AC_SUBST(TESTBFDLIB)
AC_SUBST(TESTCTFLIB)
target_vendor=${target_vendor=$host_vendor}
case "$target_vendor" in
hp) EXTRA_SHLIB_EXTENSION=".sl" ;;
*) EXTRA_SHLIB_EXTENSION= ;;
esac
case "$target_os" in
lynxos) EXTRA_SHLIB_EXTENSION=".a" ;;
esac
if test x${EXTRA_SHLIB_EXTENSION} != x ; then
AC_DEFINE_UNQUOTED(EXTRA_SHLIB_EXTENSION, "$EXTRA_SHLIB_EXTENSION",
[Additional extension a shared object might have.])
fi
AC_CONFIG_COMMANDS([default],
[[
case "$srcdir" in
.) srcdirpre= ;;
*) srcdirpre='$(srcdir)/' ;;
esac
POFILES=
GMOFILES=
for lang in dummy $OBSOLETE_ALL_LINGUAS; do
if test $lang != dummy; then
POFILES="$POFILES $srcdirpre$lang.po"
GMOFILES="$GMOFILES $srcdirpre$lang.gmo"
fi
done
sed -e '/^SRC-POTFILES =/r po/SRC-POTFILES' \
-e '/^BLD-POTFILES =/r po/BLD-POTFILES' \
-e "s,@POFILES@,$POFILES," \
-e "s,@GMOFILES@,$GMOFILES," \
po/Makefile.in > po/Makefile]],[[]])
dnl Required by html, pdf, install-pdf and install-html
AC_SUBST(datarootdir)
AC_SUBST(docdir)
AC_SUBST(htmldir)
AC_SUBST(pdfdir)
AC_CONFIG_FILES(Makefile po/Makefile.in:po/Make-in)
AC_OUTPUT