mirror of
https://sourceware.org/git/binutils-gdb.git
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9be90c6894
It's been a long time since most of this was written: it's long past time to put it in the binutils source tree. It's believed correct and complete insofar as it goes: it documents format v3 (the current version) but not the libctf API or any earlier versions. (The earlier versions can be read by libctf but not generated by it, and you are highly unlikely ever to see an example of any of them.) libctf/ChangeLog 2021-11-08 Nick Alcock <nick.alcock@oracle.com> * doc/ctf-spec.texi: New file. * configure.ac (MAKEINFO): Add. (BUILD_INFO): Likewise. (AC_CONFIG_FILES) [doc/Makefile]: Add. * Makefile.am [BUILD_INFO] (SUBDIRS): Add doc/. * doc/Makefile.am: New file. * doc/Makefile.in: Likewise. * configure: Regenerated. * Makefile.in: Likewise.
297 lines
11 KiB
Plaintext
297 lines
11 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) 2019-2021 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], 1.2.0)
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AC_CONFIG_SRCDIR(ctf-impl.h)
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AC_CONFIG_MACRO_DIR(..)
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AC_CONFIG_MACRO_DIR(../config)
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AC_CONFIG_MACRO_DIR(../bfd)
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AC_CANONICAL_BUILD
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AC_CANONICAL_HOST
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AC_CANONICAL_TARGET
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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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ZW_GNU_GETTEXT_SISTER_DIR
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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(dlsym, dl)
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AM_ZLIB
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GCC_ENABLE([libctf-hash-debugging], [no], [], [Enable expensive debugging of CTF deduplication type hashing])
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if test "${enable_libctf_hash_debugging}" = yes; then
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AC_DEFINE(ENABLE_LIBCTF_HASH_DEBUGGING, 1, [Enable expensive debugging of CTF deduplication type hashing])
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fi
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AM_CONDITIONAL(ENABLE_LIBCTF_HASH_DEBUGGING, test "${enable_libctf_hash_debugging}" = yes)
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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 $LIBS"
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AC_CACHE_CHECK([for ELF support in BFD], ac_cv_libctf_bfd_elf,
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[AC_TRY_LINK([#include <stdlib.h>
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#include <string.h>
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#include "bfd.h"
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#include "elf-bfd.h"],
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[(void) bfd_section_from_elf_index (NULL, 0);
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return 0;],
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[ac_cv_libctf_bfd_elf=yes],
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[ac_cv_libctf_bfd_elf=no])])
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CFLAGS=$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 bswap_{16,32,64}
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AC_CHECK_DECLS([bswap_16, bswap_32, bswap_64], [], [], [[#include <byteswap.h>]])
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AC_CHECK_DECLS([asprintf, vasprintf, stpcpy])
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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 $ac_cv_libctf_macro_O_CLOEXEC = yes; then
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AC_DEFINE([HAVE_O_CLOEXEC], 1,
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[Whether the platform has a definition of O_CLOEXEC.])
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fi
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build_info=
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makeinfo_too_old=
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AC_CHECK_PROGS([MAKEINFO], makeinfo, [$MISSING makeinfo])
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case " $build_configdirs " in
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*" texinfo "*) MAKEINFO='$$r/$(BUILD_SUBDIR)/texinfo/makeinfo/makeinfo' ;;
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esac
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changequote(,)
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# We require texinfo to be 6.3 or later, for a working synindex
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# and validatemenus: otherwise we fall back to /bin/true.
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if ${MAKEINFO} --version \
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| egrep 'texinfo[^0-9]*(6\.[3-9]|[7-9][0-9])' >/dev/null 2>&1; then
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build_info=yes
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else
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build_info=
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makeinfo_too_old=t
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fi
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changequote([,])
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if test -n "$makeinfo_too_old"; then
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AC_MSG_WARN([
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*** Makeinfo is too old. Info documentation will not be built.])
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fi
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AC_SUBST(MAKEINFO)
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AM_CONDITIONAL(BUILD_INFO, test "${build_info}" = yes)
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CTF_LIBADD="-L`pwd`/../libiberty -liberty"
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SHARED_LDFLAGS=
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# Horrible hacks to build DLLs on Windows and a shared library elsewhere.
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if test "$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. We can't do that if a pic libiberty is unavailable
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# since including non-pic # 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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# Also, jam libintl into the right place in all of this: after libiberty,
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# which uses it, but before -lcygwin, which it uses.
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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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CTF_LIBADD="-L`pwd`/../libiberty/pic -liberty"
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fi
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fi
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CTF_LIBADD="$CTF_LIBADD $LIBINTL"
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if test "$enable_shared" = "yes"; then
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case "${host}" in
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# More hacks to build DLLs on Windows.
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*-*-cygwin*)
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SHARED_LDFLAGS="-no-undefined"
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CTF_LIBADD="$CTF_LIBADD -lcygwin"
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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(CTF_LIBADD)
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AC_PATH_PROG([EXPECT], [expect])
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AC_CACHE_CHECK([for Tcl supporting try/catch], [ac_cv_libctf_tcl_try],
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[ac_cv_libctf_tcl_try=`if test -z $EXPECT; then echo no; else $EXPECT << EOF
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if @<:@llength @<:@info commands try@:>@@:>@ then { puts yes } else { puts no }
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EOF
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fi`
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])
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AM_CONDITIONAL(TCL_TRY, test "${ac_cv_libctf_tcl_try}" = yes)
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# Use a version script, if possible, or an -export-symbols-regex otherwise.
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decommented_version_script=
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AC_CACHE_CHECK([for linker versioning flags], [ac_cv_libctf_version_script],
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[echo 'FOO { global: mai*; local: ctf_fo*; };' > conftest.ver
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old_LDFLAGS="$LDFLAGS"
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old_CFLAGS="$CFLAGS"
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LDFLAGS="$LDFLAGS -shared -Wl,--version-script=conftest.ver"
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CFLAGS="$CFLAGS -fPIC"
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AC_LINK_IFELSE([AC_LANG_SOURCE([[int ctf_foo (void) { return 0; }
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int main (void) { return ctf_foo(); }]])],
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[ac_cv_libctf_version_script="-Wl,--version-script='$srcdir/libctf.ver'"],
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[])
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LDFLAGS="$old_LDFLAGS"
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if test -z "$ac_cv_libctf_version_script"; then
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LDFLAGS="$LDFLAGS -shared -Wl,-B,local -Wl,-z,gnu-version-script=conftest.ver"
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AC_LINK_IFELSE([AC_LANG_SOURCE([[int ctf_foo (void) { return 0; }
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int main (void) { return ctf_foo(); }]])],
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[ac_cv_libctf_version_script="-Wl,-B,local -Wl,-z,gnu-version-script"
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decommented_version_script=t],
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[])
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LDFLAGS="$old_LDFLAGS"
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fi
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CFLAGS="$old_CFLAGS"
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if test -z "$ac_cv_libctf_version_script"; then
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ac_cv_libctf_version_script='-export-symbols-regex ctf_.*'
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fi
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rm -f conftest.ver])
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if test -n "$decommented_version_script"; then
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# Solaris's version scripts use shell-style comments rather than the C-style
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# used by GNU ld. Use cpp to strip the comments out. (cpp exists under this
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# name on all platforms that support ld -z gnu-version-script.)
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# Also ensure that no symbols exist in the version script for libctf-nobfd.so
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# that do not exist in the shared library itself, since some linkers add such
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# symbols with type NOTYPE.
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/lib/cpp < $srcdir/libctf.ver > libctf-decommented.ver
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grep -v 'libctf only' $srcdir/libctf.ver | /lib/cpp > libctf-nobfd-decommented.ver
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VERSION_FLAGS="$ac_cv_libctf_version_script='libctf-decommented.ver'"
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VERSION_FLAGS_NOBFD="$ac_cv_libctf_version_script='libctf-nobfd-decommented.ver'"
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else
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VERSION_FLAGS="$ac_cv_libctf_version_script"
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VERSION_FLAGS_NOBFD="$ac_cv_libctf_version_script"
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fi
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AC_SUBST(VERSION_FLAGS)
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AC_SUBST(VERSION_FLAGS_NOBFD)
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AC_CONFIG_FILES(Makefile doc/Makefile)
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AC_CONFIG_HEADERS(config.h)
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AC_OUTPUT
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GNU_MAKE_JOBSERVER
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