dnl -*- Autoconf -*-
dnl Process this file with autoconf to produce a configure script.
dnl
dnl Copyright (C) 2019-2022 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 2 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 COPYING. If not see
dnl <http://www.gnu.org/licenses/>.
dnl
AC_PREREQ(2.64)
AC_INIT([libctf], 1.2.0)
AC_CONFIG_SRCDIR(ctf-impl.h)
AC_CONFIG_MACRO_DIR(..)
AC_CONFIG_MACRO_DIR(../config)
AC_CONFIG_MACRO_DIR(../bfd)
AC_CANONICAL_BUILD
AC_CANONICAL_HOST
AC_CANONICAL_TARGET
AC_USE_SYSTEM_EXTENSIONS
AM_INIT_AUTOMAKE
AM_SILENT_RULES([yes])
# Checks for programs.
AC_PROG_MAKE_SET
AC_PROG_CC
AC_PROG_RANLIB
AM_PROG_AR
ZW_GNU_GETTEXT_SISTER_DIR
dnl Default to a non shared library. This may be overridden by the
dnl configure option --enable-shared.
AC_DISABLE_SHARED
LT_INIT
AC_SYS_LARGEFILE
MISSING=`cd $ac_aux_dir && ${PWDCMD-pwd}`/missing
AC_CHECK_PROGS([ACLOCAL], [aclocal], [$MISSING aclocal])
AC_CHECK_PROGS([AUTOCONF], [autoconf], [$MISSING autoconf])
AC_CHECK_PROGS([AUTOHEADER], [autoheader], [$MISSING autoheader])
# Figure out what compiler warnings we can enable.
# See config/warnings.m4 for details.
ACX_PROG_CC_WARNING_OPTS([-W -Wall -Wno-narrowing -Wwrite-strings \
-Wmissing-format-attribute], [warn])
ACX_PROG_CC_WARNING_OPTS([-Wstrict-prototypes -Wmissing-prototypes \
-Wold-style-definition], [c_warn])
ACX_PROG_CC_WARNING_ALMOST_PEDANTIC([-Wno-long-long])
# Only enable with --enable-werror-always until existing warnings are
# corrected.
ACX_PROG_CC_WARNINGS_ARE_ERRORS([manual])
AM_MAINTAINER_MODE
AM_INSTALL_LIBBFD
ACX_PROG_CC_WARNING_OPTS([-Wall], [ac_libctf_warn_cflags])
AC_FUNC_MMAP
# Needed for BFD capability checks.
AC_SEARCH_LIBS(dlsym, dl)
AM_ZLIB
GCC_ENABLE([libctf-hash-debugging], [no], [], [Enable expensive debugging of CTF deduplication type hashing])
if test "${enable_libctf_hash_debugging}" = yes; then
AC_DEFINE(ENABLE_LIBCTF_HASH_DEBUGGING, 1, [Enable expensive debugging of CTF deduplication type hashing])
fi
AM_CONDITIONAL(ENABLE_LIBCTF_HASH_DEBUGGING, test "${enable_libctf_hash_debugging}" = yes)
# Similar to GDB_AC_CHECK_BFD.
OLD_CFLAGS=$CFLAGS
OLD_LDFLAGS=$LDFLAGS
OLD_LIBS=$LIBS
# Put the old CFLAGS/LDFLAGS last, in case the user's (C|LD)FLAGS
# points somewhere with bfd, with -I/foo/lib and -L/foo/lib. We
# always want our bfd.
CFLAGS="-I${srcdir}/../include -I../bfd -I${srcdir}/../bfd $CFLAGS"
ZLIBDIR=`echo $zlibdir | sed 's,\$(top_builddir)/,,g'`
LDFLAGS="-L../bfd -L../libiberty $ZLIBDIR $LDFLAGS"
intl=`echo $LIBINTL | sed 's,${top_builddir}/,,g'`
LIBS="-lbfd -liberty -lz $intl $LIBS"
AC_CACHE_CHECK([for ELF support in BFD], ac_cv_libctf_bfd_elf,
[AC_TRY_LINK([#include <stdlib.h>
#include <string.h>
#include "bfd.h"
#include "elf-bfd.h"],
[(void) bfd_section_from_elf_index (NULL, 0);
return 0;],
[ac_cv_libctf_bfd_elf=yes],
[ac_cv_libctf_bfd_elf=no])])
CFLAGS=$OLD_CFLAGS
LDFLAGS=$OLD_LDFLAGS
LIBS=$OLD_LIBS
if test $ac_cv_libctf_bfd_elf = yes; then
AC_DEFINE([HAVE_BFD_ELF], 1,
[Whether libbfd was configured for an ELF target.])
fi
AC_C_BIGENDIAN
AC_CHECK_HEADERS(byteswap.h endian.h)
AC_CHECK_FUNCS(pread)
dnl Check for bswap_{16,32,64}
AC_CHECK_DECLS([bswap_16, bswap_32, bswap_64], [], [], [[#include <byteswap.h>]])
AC_CHECK_DECLS([asprintf, vasprintf, stpcpy])
dnl Check for qsort_r. (Taken from gnulib.)
AC_CHECK_FUNCS_ONCE([qsort_r])
if test $ac_cv_func_qsort_r = yes; then
AC_CACHE_CHECK([for qsort_r signature], [ac_cv_libctf_qsort_r_signature],
[AC_LINK_IFELSE(
[AC_LANG_PROGRAM([[#undef qsort_r
#include <stdlib.h>
void qsort_r (void *, size_t, size_t,
int (*) (void const *, void const *,
void *),
void *);
void (*p) (void *, size_t, size_t,
int (*) (void const *, void const *,
void *),
void *) = qsort_r;
]])],
[ac_cv_libctf_qsort_r_signature=GNU],
[AC_LINK_IFELSE(
[AC_LANG_PROGRAM([[#undef qsort_r
#include <stdlib.h>
void qsort_r (void *, size_t, size_t, void *,
int (*) (void *,
void const *,
void const *));
void (*p) (void *, size_t, size_t, void *,
int (*) (void *, void const *,
void const *)) = qsort_r;
]])],
[ac_cv_libctf_qsort_r_signature=BSD],
[ac_cv_libctf_qsort_r_signature=unknown])])])
fi
case x$ac_cv_libctf_qsort_r_signature in
xGNU) AC_DEFINE([HAVE_QSORT_R_ARG_LAST], 1,
[Whether a qsort_r exists with a void *arg as its last arg.]);;
xBSD) AC_DEFINE([HAVE_QSORT_R_COMPAR_LAST], 1,
[Whether a qsort_r exists with the compar function as its last arg.]);;
*) ac_cv_libctf_qsort_r_signature=unknown;;
esac
AM_CONDITIONAL(NEED_CTF_QSORT_R, test "${ac_cv_libctf_qsort_r_signature}" = unknown)
AC_CACHE_CHECK([for O_CLOEXEC], [ac_cv_libctf_macro_O_CLOEXEC],
[AC_LINK_IFELSE(
[AC_LANG_PROGRAM([[#include <fcntl.h>
#ifndef O_CLOEXEC
choke me;
#endif
]],
[[return O_CLOEXEC;]])],
[ac_cv_libctf_macro_O_CLOEXEC=yes],
[ac_cv_libctf_macro_O_CLOEXEC=no])])
if test $ac_cv_libctf_macro_O_CLOEXEC = yes; then
AC_DEFINE([HAVE_O_CLOEXEC], 1,
[Whether the platform has a definition of O_CLOEXEC.])
fi
build_info=
makeinfo_too_old=
AC_CHECK_PROGS([MAKEINFO], makeinfo, [$MISSING makeinfo])
case " $build_configdirs " in
*" texinfo "*) MAKEINFO='$$r/$(BUILD_SUBDIR)/texinfo/makeinfo/makeinfo' ;;
esac
changequote(,)
# We require texinfo to be 6.3 or later, for a working synindex
# and validatemenus: otherwise we fall back to /bin/true.
if ${MAKEINFO} --version \
| egrep 'texinfo[^0-9]*(6\.[3-9]|[7-9][0-9])' >/dev/null 2>&1; then
build_info=yes
else
build_info=
makeinfo_too_old=t
fi
changequote([,])
if test -n "$makeinfo_too_old"; then
AC_MSG_WARN([
*** Makeinfo is too old. Info documentation will not be built.])
fi
AC_SUBST(MAKEINFO)
AM_CONDITIONAL(BUILD_INFO, test "${build_info}" = yes)
CTF_LIBADD="-L`pwd`/../libiberty -liberty"
SHARED_LDFLAGS=
# Horrible hacks to build DLLs on Windows and a shared library elsewhere.
if test "$enable_shared" = "yes"; then
# When building a shared libctf, link against the pic version of libiberty
# so that apps that use libctf won't need libiberty just to satisfy any
# libctf references. We can't do that if a pic libiberty is unavailable
# since including non-pic # code would insert text relocations into libctf.
# Note that linking against libbfd as we do here, which is itself linked
# against libiberty, may not satisfy all the libctf libiberty references
# since libbfd may not pull in the entirety of libiberty.
# Also, jam libintl into the right place in all of this: after libiberty,
# which uses it, but before -lcygwin, which it uses.
changequote(,)dnl
x=`sed -n -e 's/^[ ]*PICFLAG[ ]*=[ ]*//p' < ../libiberty/Makefile | sed -n '$p'`
changequote([,])dnl
if test -n "$x"; then
CTF_LIBADD="-L`pwd`/../libiberty/pic -liberty"
fi
fi
CTF_LIBADD="$CTF_LIBADD $LIBINTL"
if test "$enable_shared" = "yes"; then
case "${host}" in
# More hacks to build DLLs on Windows.
*-*-cygwin*)
SHARED_LDFLAGS="-no-undefined"
CTF_LIBADD="$CTF_LIBADD -lcygwin"
;;
esac
fi
AC_SUBST(SHARED_LDFLAGS)
AC_SUBST(CTF_LIBADD)
AC_PATH_PROG([EXPECT], [expect])
AC_CACHE_CHECK([for Tcl supporting try/catch], [ac_cv_libctf_tcl_try],
[ac_cv_libctf_tcl_try=`if test -z $EXPECT; then echo no; else $EXPECT << EOF
if @<:@llength @<:@info commands try@:>@@:>@ then { puts yes } else { puts no }
EOF
fi`
])
AM_CONDITIONAL(TCL_TRY, test "${ac_cv_libctf_tcl_try}" = yes)
# Use a version script, if possible, or an -export-symbols-regex otherwise.
decommented_version_script=
AC_CACHE_CHECK([for linker versioning flags], [ac_cv_libctf_version_script],
[echo 'FOO { global: mai*; local: ctf_fo*; };' > conftest.ver
old_LDFLAGS="$LDFLAGS"
old_CFLAGS="$CFLAGS"
LDFLAGS="$LDFLAGS -shared -Wl,--version-script=conftest.ver"
CFLAGS="$CFLAGS -fPIC"
AC_LINK_IFELSE([AC_LANG_SOURCE([[int ctf_foo (void) { return 0; }
int main (void) { return ctf_foo(); }]])],
[ac_cv_libctf_version_script="-Wl,--version-script='$srcdir/libctf.ver'"],
[])
LDFLAGS="$old_LDFLAGS"
if test -z "$ac_cv_libctf_version_script"; then
LDFLAGS="$LDFLAGS -shared -Wl,-B,local -Wl,-z,gnu-version-script=conftest.ver"
AC_LINK_IFELSE([AC_LANG_SOURCE([[int ctf_foo (void) { return 0; }
int main (void) { return ctf_foo(); }]])],
[ac_cv_libctf_version_script="-Wl,-B,local -Wl,-z,gnu-version-script"
decommented_version_script=t],
[])
LDFLAGS="$old_LDFLAGS"
fi
CFLAGS="$old_CFLAGS"
if test -z "$ac_cv_libctf_version_script"; then
ac_cv_libctf_version_script='-export-symbols-regex ctf_.*'
fi
rm -f conftest.ver])
if test -n "$decommented_version_script"; then
# Solaris's version scripts use shell-style comments rather than the C-style
# used by GNU ld. Use cpp to strip the comments out. (cpp exists under this
# name on all platforms that support ld -z gnu-version-script.)
# Also ensure that no symbols exist in the version script for libctf-nobfd.so
# that do not exist in the shared library itself, since some linkers add such
# symbols with type NOTYPE.
/lib/cpp < $srcdir/libctf.ver > libctf-decommented.ver
grep -v 'libctf only' $srcdir/libctf.ver | /lib/cpp > libctf-nobfd-decommented.ver
VERSION_FLAGS="$ac_cv_libctf_version_script='libctf-decommented.ver'"
VERSION_FLAGS_NOBFD="$ac_cv_libctf_version_script='libctf-nobfd-decommented.ver'"
else
VERSION_FLAGS="$ac_cv_libctf_version_script"
VERSION_FLAGS_NOBFD="$ac_cv_libctf_version_script"
fi
AC_SUBST(VERSION_FLAGS)
AC_SUBST(VERSION_FLAGS_NOBFD)
AC_CONFIG_FILES(Makefile)
AC_CONFIG_HEADERS(config.h)
AC_OUTPUT
GNU_MAKE_JOBSERVER