87279e3cef
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.
221 lines
7.6 KiB
Plaintext
221 lines
7.6 KiB
Plaintext
dnl -*- Autoconf -*-
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dnl Process this file with autoconf to produce a configure script.
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dnl
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dnl Copyright (C) 2019 Free Software Foundation, Inc.
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dnl
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dnl This file is free software; you can redistribute it and/or modify
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dnl it under the terms of the GNU General Public License as published by
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dnl the Free Software Foundation; either version 2 of the License, or
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dnl (at your option) any later version.
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dnl
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dnl This program is distributed in the hope that it will be useful,
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dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
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dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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dnl GNU General Public License for more details.
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dnl
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dnl You should have received a copy of the GNU General Public License
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dnl along with this program; see the file COPYING. If not see
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dnl <http://www.gnu.org/licenses/>.
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dnl
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AC_PREREQ(2.64)
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AC_INIT([libctf library], 1.2.0-pre)
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AC_CONFIG_SRCDIR(ctf-impl.h)
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AC_CONFIG_MACRO_DIR(../config)
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AC_CONFIG_MACRO_DIR(../bfd)
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AC_USE_SYSTEM_EXTENSIONS
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AM_INIT_AUTOMAKE
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# Checks for programs.
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AC_PROG_MAKE_SET
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AC_PROG_CC
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AC_PROG_RANLIB
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AM_PROG_AR
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dnl Default to a non shared library. This may be overridden by the
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dnl configure option --enable-shared.
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AC_DISABLE_SHARED
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LT_INIT
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AC_SYS_LARGEFILE
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MISSING=`cd $ac_aux_dir && ${PWDCMD-pwd}`/missing
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AC_CHECK_PROGS([ACLOCAL], [aclocal], [$MISSING aclocal])
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AC_CHECK_PROGS([AUTOCONF], [autoconf], [$MISSING autoconf])
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AC_CHECK_PROGS([AUTOHEADER], [autoheader], [$MISSING autoheader])
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# Figure out what compiler warnings we can enable.
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# See config/warnings.m4 for details.
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ACX_PROG_CC_WARNING_OPTS([-W -Wall -Wno-narrowing -Wwrite-strings \
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-Wmissing-format-attribute], [warn])
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ACX_PROG_CC_WARNING_OPTS([-Wstrict-prototypes -Wmissing-prototypes \
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-Wold-style-definition], [c_warn])
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ACX_PROG_CC_WARNING_ALMOST_PEDANTIC([-Wno-long-long])
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# Only enable with --enable-werror-always until existing warnings are
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# corrected.
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ACX_PROG_CC_WARNINGS_ARE_ERRORS([manual])
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AM_MAINTAINER_MODE
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AM_INSTALL_LIBBFD
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ACX_PROG_CC_WARNING_OPTS([-Wall], [ac_libctf_warn_cflags])
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AC_FUNC_MMAP
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# Needed for BFD capability checks.
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AC_SEARCH_LIBS(dlopen, dl)
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AM_ZLIB
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# Similar to GDB_AC_CHECK_BFD.
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OLD_CFLAGS=$CFLAGS
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OLD_LDFLAGS=$LDFLAGS
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OLD_LIBS=$LIBS
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# Put the old CFLAGS/LDFLAGS last, in case the user's (C|LD)FLAGS
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# points somewhere with bfd, with -I/foo/lib and -L/foo/lib. We
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# always want our bfd.
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CFLAGS="-I${srcdir}/../include -I../bfd -I${srcdir}/../bfd $CFLAGS"
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ZLIBDIR=`echo $zlibdir | sed 's,\$(top_builddir)/,,g'`
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LDFLAGS="-L../bfd -L../libiberty $ZLIBDIR $LDFLAGS"
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intl=`echo $LIBINTL | sed 's,${top_builddir}/,,g'`
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LIBS="-lbfd -liberty -lz $intl $LIBS"
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AC_CACHE_CHECK([for ELF support in BFD], ac_cv_libctf_bfd_elf,
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[AC_TRY_LINK([#include <stdlib.h>
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#include "bfd.h"
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#include "elf-bfd.h"],
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[(void) bfd_section_from_elf_index (NULL, 0);
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return 0;],
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[ac_cv_libctf_bfd_elf=yes],
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[ac_cv_libctf_bfd_elf=no])])
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CFLAGS=$OLD_CFLAGS
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LDFLAGS=$OLD_LDFLAGS
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LIBS=$OLD_LIBS
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if test $ac_cv_libctf_bfd_elf = yes; then
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AC_DEFINE([HAVE_BFD_ELF], 1,
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[Whether libbfd was configured for an ELF target.])
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fi
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AC_C_BIGENDIAN
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AC_CHECK_HEADERS(byteswap.h endian.h)
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AC_CHECK_FUNCS(pread)
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dnl Check for qsort_r. (Taken from gnulib.)
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AC_CHECK_FUNCS_ONCE([qsort_r])
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if test $ac_cv_func_qsort_r = yes; then
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AC_CACHE_CHECK([for qsort_r signature], [ac_cv_libctf_qsort_r_signature],
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[AC_LINK_IFELSE(
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[AC_LANG_PROGRAM([[#undef qsort_r
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#include <stdlib.h>
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void qsort_r (void *, size_t, size_t,
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int (*) (void const *, void const *,
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void *),
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void *);
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void (*p) (void *, size_t, size_t,
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int (*) (void const *, void const *,
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void *),
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void *) = qsort_r;
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]])],
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[ac_cv_libctf_qsort_r_signature=GNU],
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[AC_LINK_IFELSE(
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[AC_LANG_PROGRAM([[#undef qsort_r
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#include <stdlib.h>
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void qsort_r (void *, size_t, size_t, void *,
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int (*) (void *,
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void const *,
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void const *));
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void (*p) (void *, size_t, size_t, void *,
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int (*) (void *, void const *,
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void const *)) = qsort_r;
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]])],
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[ac_cv_libctf_qsort_r_signature=BSD],
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[ac_cv_libctf_qsort_r_signature=unknown])])])
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fi
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case x$ac_cv_libctf_qsort_r_signature in
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xGNU) AC_DEFINE([HAVE_QSORT_R_ARG_LAST], 1,
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[Whether a qsort_r exists with a void *arg as its last arg.]);;
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xBSD) AC_DEFINE([HAVE_QSORT_R_COMPAR_LAST], 1,
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[Whether a qsort_r exists with the compar function as its last arg.]);;
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*) ac_cv_libctf_qsort_r_signature=unknown;;
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esac
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AM_CONDITIONAL(NEED_CTF_QSORT_R, test "${ac_cv_libctf_qsort_r_signature}" = unknown)
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AC_CACHE_CHECK([for O_CLOEXEC], [ac_cv_libctf_macro_O_CLOEXEC],
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[AC_LINK_IFELSE(
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[AC_LANG_PROGRAM([[#include <fcntl.h>
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#ifndef O_CLOEXEC
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choke me;
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#endif
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]],
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[[return O_CLOEXEC;]])],
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[ac_cv_libctf_macro_O_CLOEXEC=yes],
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[ac_cv_libctf_macro_O_CLOEXEC=no])])
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if test $ac_cv_libctf_macro_O_CLOEXEC = yes; then
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AC_DEFINE([HAVE_O_CLOEXEC], 1,
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[Whether the platform has a definition of O_CLOEXEC.])
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fi
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# Horrible hacks to build DLLs on Windows and a shared library elsewhere.
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SHARED_LIBADD=
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SHARED_LDFLAGS=
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BFD_LIBADD=
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BFD_DEPENDENCIES=
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if test "$enable_shared" = "yes"; then
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# When building a shared libctf, link against the pic version of libiberty
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# so that apps that use libctf won't need libiberty just to satisfy any
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# libctf references.
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# We can't do that if a pic libiberty is unavailable since including non-pic
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# code would insert text relocations into libctf.
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# Note that linking against libbfd as we do here, which is itself linked
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# against libiberty, may not satisfy all the libctf libiberty references
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# since libbfd may not pull in the entirety of libiberty.
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changequote(,)dnl
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x=`sed -n -e 's/^[ ]*PICFLAG[ ]*=[ ]*//p' < ../libiberty/Makefile | sed -n '$p'`
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changequote([,])dnl
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if test -n "$x"; then
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SHARED_LIBADD="-L`pwd`/../libiberty/pic -liberty"
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fi
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case "${host}" in
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# More hacks to build DLLs on Windows.
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*-*-cygwin*)
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SHARED_LDFLAGS="-no-undefined"
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SHARED_LIBADD="-L`pwd`/../libiberty -liberty -L`pwd`/../intl -lintl -lcygwin"
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BFD_LIBADD="-L`pwd`/../bfd -lbfd"
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;;
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*-*-darwin*)
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BFD_LIBADD="-Wl,`pwd`/../bfd/.libs/libbfd.dylib"
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BFD_DEPENDENCIES="../bfd/libbfd.la"
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;;
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*)
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case "$host_vendor" in
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hp)
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BFD_LIBADD="-Wl,`pwd`/../bfd/.libs/libbfd.sl"
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;;
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*)
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BFD_LIBADD="-Wl,`pwd`/../bfd/.libs/libbfd.so"
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;;
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esac
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BFD_DEPENDENCIES="../bfd/libbfd.la"
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;;
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esac
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fi
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AC_SUBST(SHARED_LDFLAGS)
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AC_SUBST(SHARED_LIBADD)
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AC_SUBST(BFD_LIBADD)
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AC_SUBST(BFD_DEPENDENCIES)
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# Use a version script, if possible, or an -export-symbols-regex otherwise.
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VERSION_FLAGS='-export-symbols-regex ctf_.*'
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if $LD --help 2>&1 | grep -- --version-script >/dev/null; then
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VERSION_FLAGS="-Wl,--version-script='$srcdir/libctf.ver'"
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fi
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AC_SUBST(VERSION_FLAGS)
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AC_CONFIG_FILES(Makefile)
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AC_CONFIG_HEADERS(config.h)
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AC_OUTPUT
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