| 1 | dnl -*- Autoconf -*- |
| 2 | dnl Process this file with autoconf to produce a configure script. |
| 3 | dnl |
| 4 | dnl Copyright (C) 2019-2020 Free Software Foundation, Inc. |
| 5 | dnl |
| 6 | dnl This file is free software; you can redistribute it and/or modify |
| 7 | dnl it under the terms of the GNU General Public License as published by |
| 8 | dnl the Free Software Foundation; either version 2 of the License, or |
| 9 | dnl (at your option) any later version. |
| 10 | dnl |
| 11 | dnl This program is distributed in the hope that it will be useful, |
| 12 | dnl but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | dnl GNU General Public License for more details. |
| 15 | dnl |
| 16 | dnl You should have received a copy of the GNU General Public License |
| 17 | dnl along with this program; see the file COPYING. If not see |
| 18 | dnl <http://www.gnu.org/licenses/>. |
| 19 | dnl |
| 20 | |
| 21 | AC_PREREQ(2.64) |
| 22 | AC_INIT([libctf library], 1.2.0-pre) |
| 23 | AC_CONFIG_SRCDIR(ctf-impl.h) |
| 24 | AC_CONFIG_MACRO_DIR(../config) |
| 25 | AC_CONFIG_MACRO_DIR(../bfd) |
| 26 | AC_USE_SYSTEM_EXTENSIONS |
| 27 | AM_INIT_AUTOMAKE |
| 28 | |
| 29 | # Checks for programs. |
| 30 | AC_PROG_MAKE_SET |
| 31 | AC_PROG_CC |
| 32 | AC_PROG_RANLIB |
| 33 | AM_PROG_AR |
| 34 | ZW_GNU_GETTEXT_SISTER_DIR |
| 35 | |
| 36 | dnl Default to a non shared library. This may be overridden by the |
| 37 | dnl configure option --enable-shared. |
| 38 | AC_DISABLE_SHARED |
| 39 | |
| 40 | LT_INIT |
| 41 | AC_SYS_LARGEFILE |
| 42 | |
| 43 | MISSING=`cd $ac_aux_dir && ${PWDCMD-pwd}`/missing |
| 44 | AC_CHECK_PROGS([ACLOCAL], [aclocal], [$MISSING aclocal]) |
| 45 | AC_CHECK_PROGS([AUTOCONF], [autoconf], [$MISSING autoconf]) |
| 46 | AC_CHECK_PROGS([AUTOHEADER], [autoheader], [$MISSING autoheader]) |
| 47 | |
| 48 | # Figure out what compiler warnings we can enable. |
| 49 | # See config/warnings.m4 for details. |
| 50 | |
| 51 | ACX_PROG_CC_WARNING_OPTS([-W -Wall -Wno-narrowing -Wwrite-strings \ |
| 52 | -Wmissing-format-attribute], [warn]) |
| 53 | ACX_PROG_CC_WARNING_OPTS([-Wstrict-prototypes -Wmissing-prototypes \ |
| 54 | -Wold-style-definition], [c_warn]) |
| 55 | ACX_PROG_CC_WARNING_ALMOST_PEDANTIC([-Wno-long-long]) |
| 56 | |
| 57 | # Only enable with --enable-werror-always until existing warnings are |
| 58 | # corrected. |
| 59 | ACX_PROG_CC_WARNINGS_ARE_ERRORS([manual]) |
| 60 | |
| 61 | AM_MAINTAINER_MODE |
| 62 | AM_INSTALL_LIBBFD |
| 63 | ACX_PROG_CC_WARNING_OPTS([-Wall], [ac_libctf_warn_cflags]) |
| 64 | |
| 65 | AC_FUNC_MMAP |
| 66 | # Needed for BFD capability checks. |
| 67 | AC_SEARCH_LIBS(dlopen, dl) |
| 68 | AM_ZLIB |
| 69 | |
| 70 | GCC_ENABLE([libctf-hash-debugging], [no], [], [Enable expensive debugging of CTF deduplication type hashing]) |
| 71 | if test "${enable_libctf_hash_debugging}" = yes; then |
| 72 | AC_DEFINE(ENABLE_LIBCTF_HASH_DEBUGGING, 1, [Enable expensive debugging of CTF deduplication type hashing]) |
| 73 | fi |
| 74 | AM_CONDITIONAL(ENABLE_LIBCTF_HASH_DEBUGGING, test "${enable_libctf_hash_debugging}" = yes) |
| 75 | |
| 76 | # Similar to GDB_AC_CHECK_BFD. |
| 77 | OLD_CFLAGS=$CFLAGS |
| 78 | OLD_LDFLAGS=$LDFLAGS |
| 79 | OLD_LIBS=$LIBS |
| 80 | # Put the old CFLAGS/LDFLAGS last, in case the user's (C|LD)FLAGS |
| 81 | # points somewhere with bfd, with -I/foo/lib and -L/foo/lib. We |
| 82 | # always want our bfd. |
| 83 | CFLAGS="-I${srcdir}/../include -I../bfd -I${srcdir}/../bfd $CFLAGS" |
| 84 | ZLIBDIR=`echo $zlibdir | sed 's,\$(top_builddir)/,,g'` |
| 85 | LDFLAGS="-L../bfd -L../libiberty $ZLIBDIR $LDFLAGS" |
| 86 | intl=`echo $LIBINTL | sed 's,${top_builddir}/,,g'` |
| 87 | LIBS="-lbfd -liberty -lz $intl $LIBS" |
| 88 | AC_CACHE_CHECK([for ELF support in BFD], ac_cv_libctf_bfd_elf, |
| 89 | [AC_TRY_LINK([#include <stdlib.h> |
| 90 | #include "bfd.h" |
| 91 | #include "elf-bfd.h"], |
| 92 | [(void) bfd_section_from_elf_index (NULL, 0); |
| 93 | return 0;], |
| 94 | [ac_cv_libctf_bfd_elf=yes], |
| 95 | [ac_cv_libctf_bfd_elf=no])]) |
| 96 | CFLAGS=$OLD_CFLAGS |
| 97 | LDFLAGS=$OLD_LDFLAGS |
| 98 | LIBS=$OLD_LIBS |
| 99 | |
| 100 | if test $ac_cv_libctf_bfd_elf = yes; then |
| 101 | AC_DEFINE([HAVE_BFD_ELF], 1, |
| 102 | [Whether libbfd was configured for an ELF target.]) |
| 103 | fi |
| 104 | |
| 105 | AC_C_BIGENDIAN |
| 106 | AC_CHECK_HEADERS(byteswap.h endian.h) |
| 107 | AC_CHECK_FUNCS(pread) |
| 108 | |
| 109 | dnl Check for bswap_{16,32,64} |
| 110 | AC_CHECK_DECLS([bswap_16, bswap_32, bswap_64], [], [], [[#include <byteswap.h>]]) |
| 111 | AC_CHECK_DECLS([asprintf, vasprintf, stpcpy]) |
| 112 | |
| 113 | dnl Check for qsort_r. (Taken from gnulib.) |
| 114 | AC_CHECK_FUNCS_ONCE([qsort_r]) |
| 115 | if test $ac_cv_func_qsort_r = yes; then |
| 116 | AC_CACHE_CHECK([for qsort_r signature], [ac_cv_libctf_qsort_r_signature], |
| 117 | [AC_LINK_IFELSE( |
| 118 | [AC_LANG_PROGRAM([[#undef qsort_r |
| 119 | #include <stdlib.h> |
| 120 | void qsort_r (void *, size_t, size_t, |
| 121 | int (*) (void const *, void const *, |
| 122 | void *), |
| 123 | void *); |
| 124 | void (*p) (void *, size_t, size_t, |
| 125 | int (*) (void const *, void const *, |
| 126 | void *), |
| 127 | void *) = qsort_r; |
| 128 | ]])], |
| 129 | [ac_cv_libctf_qsort_r_signature=GNU], |
| 130 | [AC_LINK_IFELSE( |
| 131 | [AC_LANG_PROGRAM([[#undef qsort_r |
| 132 | #include <stdlib.h> |
| 133 | void qsort_r (void *, size_t, size_t, void *, |
| 134 | int (*) (void *, |
| 135 | void const *, |
| 136 | void const *)); |
| 137 | void (*p) (void *, size_t, size_t, void *, |
| 138 | int (*) (void *, void const *, |
| 139 | void const *)) = qsort_r; |
| 140 | ]])], |
| 141 | [ac_cv_libctf_qsort_r_signature=BSD], |
| 142 | [ac_cv_libctf_qsort_r_signature=unknown])])]) |
| 143 | fi |
| 144 | |
| 145 | case x$ac_cv_libctf_qsort_r_signature in |
| 146 | xGNU) AC_DEFINE([HAVE_QSORT_R_ARG_LAST], 1, |
| 147 | [Whether a qsort_r exists with a void *arg as its last arg.]);; |
| 148 | xBSD) AC_DEFINE([HAVE_QSORT_R_COMPAR_LAST], 1, |
| 149 | [Whether a qsort_r exists with the compar function as its last arg.]);; |
| 150 | *) ac_cv_libctf_qsort_r_signature=unknown;; |
| 151 | esac |
| 152 | |
| 153 | AM_CONDITIONAL(NEED_CTF_QSORT_R, test "${ac_cv_libctf_qsort_r_signature}" = unknown) |
| 154 | |
| 155 | AC_CACHE_CHECK([for O_CLOEXEC], [ac_cv_libctf_macro_O_CLOEXEC], |
| 156 | [AC_LINK_IFELSE( |
| 157 | [AC_LANG_PROGRAM([[#include <fcntl.h> |
| 158 | #ifndef O_CLOEXEC |
| 159 | choke me; |
| 160 | #endif |
| 161 | ]], |
| 162 | [[return O_CLOEXEC;]])], |
| 163 | [ac_cv_libctf_macro_O_CLOEXEC=yes], |
| 164 | [ac_cv_libctf_macro_O_CLOEXEC=no])]) |
| 165 | |
| 166 | if test $ac_cv_libctf_macro_O_CLOEXEC = yes; then |
| 167 | AC_DEFINE([HAVE_O_CLOEXEC], 1, |
| 168 | [Whether the platform has a definition of O_CLOEXEC.]) |
| 169 | fi |
| 170 | |
| 171 | # Horrible hacks to build DLLs on Windows and a shared library elsewhere. |
| 172 | SHARED_LIBADD= |
| 173 | SHARED_LDFLAGS= |
| 174 | BFD_LIBADD= |
| 175 | BFD_DEPENDENCIES= |
| 176 | if test "$enable_shared" = "yes"; then |
| 177 | # When building a shared libctf, link against the pic version of libiberty |
| 178 | # so that apps that use libctf won't need libiberty just to satisfy any |
| 179 | # libctf references. |
| 180 | # We can't do that if a pic libiberty is unavailable since including non-pic |
| 181 | # code would insert text relocations into libctf. |
| 182 | # Note that linking against libbfd as we do here, which is itself linked |
| 183 | # against libiberty, may not satisfy all the libctf libiberty references |
| 184 | # since libbfd may not pull in the entirety of libiberty. |
| 185 | changequote(,)dnl |
| 186 | x=`sed -n -e 's/^[ ]*PICFLAG[ ]*=[ ]*//p' < ../libiberty/Makefile | sed -n '$p'` |
| 187 | changequote([,])dnl |
| 188 | if test -n "$x"; then |
| 189 | SHARED_LIBADD="-L`pwd`/../libiberty/pic -liberty" |
| 190 | fi |
| 191 | |
| 192 | case "${host}" in |
| 193 | # More hacks to build DLLs on Windows. |
| 194 | *-*-cygwin*) |
| 195 | SHARED_LDFLAGS="-no-undefined" |
| 196 | SHARED_LIBADD="-L`pwd`/../libiberty -liberty -L`pwd`/../intl -lintl -lcygwin" |
| 197 | BFD_LIBADD="-L`pwd`/../bfd -lbfd" |
| 198 | ;; |
| 199 | |
| 200 | *-*-darwin*) |
| 201 | BFD_LIBADD="-Wl,`pwd`/../bfd/.libs/libbfd.dylib" |
| 202 | BFD_DEPENDENCIES="../bfd/libbfd.la" |
| 203 | ;; |
| 204 | *) |
| 205 | case "$host_vendor" in |
| 206 | hp) |
| 207 | BFD_LIBADD="-Wl,`pwd`/../bfd/.libs/libbfd.sl" |
| 208 | ;; |
| 209 | *) |
| 210 | BFD_LIBADD="-Wl,`pwd`/../bfd/.libs/libbfd.so" |
| 211 | ;; |
| 212 | esac |
| 213 | BFD_DEPENDENCIES="../bfd/libbfd.la" |
| 214 | ;; |
| 215 | esac |
| 216 | fi |
| 217 | AC_SUBST(SHARED_LDFLAGS) |
| 218 | AC_SUBST(SHARED_LIBADD) |
| 219 | AC_SUBST(BFD_LIBADD) |
| 220 | AC_SUBST(BFD_DEPENDENCIES) |
| 221 | |
| 222 | # Use a version script, if possible, or an -export-symbols-regex otherwise. |
| 223 | VERSION_FLAGS='-export-symbols-regex ctf_.*' |
| 224 | if $LD --help 2>&1 | grep -- --version-script >/dev/null; then |
| 225 | VERSION_FLAGS="-Wl,--version-script='$srcdir/libctf.ver'" |
| 226 | fi |
| 227 | AC_SUBST(VERSION_FLAGS) |
| 228 | |
| 229 | AC_CONFIG_FILES(Makefile) |
| 230 | AC_CONFIG_HEADERS(config.h) |
| 231 | AC_OUTPUT |