dnl -*- Autoconf -*- dnl Process this file with autoconf to produce a configure script. dnl dnl Copyright (C) 2019-2023 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 . dnl AC_PREREQ(2.64) AC_INIT([libctf], 1.2.0) AC_CONFIG_SRCDIR(ctf-impl.h) 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 LT_OUTPUT 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=$LIBS OLD_CC=$CC # 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. CC="./libtool --quiet --mode=link $OLD_CC" CFLAGS="-I${srcdir}/../include -I../bfd -I${srcdir}/../bfd $CFLAGS" LDFLAGS="-L../bfd -L../libiberty $LDFLAGS" intl=`echo $LIBINTL | sed 's,${top_builddir}/,,g'` LIBS="-lbfd -liberty $intl $LIBS" AC_CACHE_CHECK([for ELF support in BFD], ac_cv_libctf_bfd_elf, [AC_TRY_LINK([#include #include #include "bfd.h" #include "elf-bfd.h"], [(void) bfd_section_from_elf_index (NULL, 0); return 0;], [ac_cv_libctf_bfd_elf=yes], [ac_cv_libctf_bfd_elf=no])]) CFLAGS=$OLD_CFLAGS LDFLAGS=$OLD_LDFLAGS LIBS=$OLD_LIBS CC=$OLD_CC 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 ]]) AC_CHECK_DECLS([asprintf, vasprintf, stpcpy]) dnl Check for qsort_r. (Taken from gnulib.) AC_CHECK_FUNCS_ONCE([qsort_r]) if test $ac_cv_func_qsort_r = yes; then AC_CACHE_CHECK([for qsort_r signature], [ac_cv_libctf_qsort_r_signature], [AC_LINK_IFELSE( [AC_LANG_PROGRAM([[#undef qsort_r #include void qsort_r (void *, size_t, size_t, int (*) (void const *, void const *, void *), void *); void (*p) (void *, size_t, size_t, int (*) (void const *, void const *, void *), void *) = qsort_r; ]])], [ac_cv_libctf_qsort_r_signature=GNU], [AC_LINK_IFELSE( [AC_LANG_PROGRAM([[#undef qsort_r #include void qsort_r (void *, size_t, size_t, void *, int (*) (void *, void const *, void const *)); void (*p) (void *, size_t, size_t, void *, int (*) (void *, void const *, void const *)) = qsort_r; ]])], [ac_cv_libctf_qsort_r_signature=BSD], [ac_cv_libctf_qsort_r_signature=unknown])])]) fi case x$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 #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 ${MAKEINFO} --version \ | egrep 'texinfo[^0-9]*(6\.[3-9]|[7-9]|[1-6][0-9])' >/dev/null 2>&1; then build_info=yes else build_info= makeinfo_too_old=t fi changequote([,]) if test -n "$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