| dnl -*- Autoconf -*- |
| dnl Process this file with autoconf to produce a configure script. |
| dnl |
| dnl Copyright (C) 2019-2021 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 |
| |
| # 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 $ac_cv_libctf_macro_O_CLOEXEC = yes; then |
| AC_DEFINE([HAVE_O_CLOEXEC], 1, |
| [Whether the platform has a definition of O_CLOEXEC.]) |
| fi |
| |
| CTF_LIBADD="-L`pwd`/../libiberty -liberty" |
| SHARED_LDFLAGS= |
| |
| # Horrible hacks to build DLLs on Windows and a shared library elsewhere. |
| if test "$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 |
