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- 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
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