1dnl -*- Autoconf -*- 2dnl Process this file with autoconf to produce a configure script. 3dnl 4dnl Copyright (C) 2019-2020 Free Software Foundation, Inc. 5dnl 6dnl This file is free software; you can redistribute it and/or modify 7dnl it under the terms of the GNU General Public License as published by 8dnl the Free Software Foundation; either version 2 of the License, or 9dnl (at your option) any later version. 10dnl 11dnl This program is distributed in the hope that it will be useful, 12dnl but WITHOUT ANY WARRANTY; without even the implied warranty of 13dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14dnl GNU General Public License for more details. 15dnl 16dnl You should have received a copy of the GNU General Public License 17dnl along with this program; see the file COPYING. If not see 18dnl <http://www.gnu.org/licenses/>. 19dnl 20 21AC_PREREQ(2.64) 22AC_INIT([libctf], 1.2.0) 23AC_CONFIG_SRCDIR(ctf-impl.h) 24AC_CONFIG_MACRO_DIR(../config) 25AC_CONFIG_MACRO_DIR(../bfd) 26AC_USE_SYSTEM_EXTENSIONS 27AM_INIT_AUTOMAKE 28 29# Checks for programs. 30AC_PROG_MAKE_SET 31AC_PROG_CC 32AC_PROG_RANLIB 33AM_PROG_AR 34ZW_GNU_GETTEXT_SISTER_DIR 35 36dnl Default to a non shared library. This may be overridden by the 37dnl configure option --enable-shared. 38AC_DISABLE_SHARED 39 40LT_INIT 41AC_SYS_LARGEFILE 42 43MISSING=`cd $ac_aux_dir && ${PWDCMD-pwd}`/missing 44AC_CHECK_PROGS([ACLOCAL], [aclocal], [$MISSING aclocal]) 45AC_CHECK_PROGS([AUTOCONF], [autoconf], [$MISSING autoconf]) 46AC_CHECK_PROGS([AUTOHEADER], [autoheader], [$MISSING autoheader]) 47 48# Figure out what compiler warnings we can enable. 49# See config/warnings.m4 for details. 50 51ACX_PROG_CC_WARNING_OPTS([-W -Wall -Wno-narrowing -Wwrite-strings \ 52 -Wmissing-format-attribute], [warn]) 53ACX_PROG_CC_WARNING_OPTS([-Wstrict-prototypes -Wmissing-prototypes \ 54 -Wold-style-definition], [c_warn]) 55ACX_PROG_CC_WARNING_ALMOST_PEDANTIC([-Wno-long-long]) 56 57# Only enable with --enable-werror-always until existing warnings are 58# corrected. 59ACX_PROG_CC_WARNINGS_ARE_ERRORS([manual]) 60 61AM_MAINTAINER_MODE 62AM_INSTALL_LIBBFD 63ACX_PROG_CC_WARNING_OPTS([-Wall], [ac_libctf_warn_cflags]) 64 65AC_FUNC_MMAP 66# Needed for BFD capability checks. 67AC_SEARCH_LIBS(dlopen, dl) 68AM_ZLIB 69 70GCC_ENABLE([libctf-hash-debugging], [no], [], [Enable expensive debugging of CTF deduplication type hashing]) 71if test "${enable_libctf_hash_debugging}" = yes; then 72 AC_DEFINE(ENABLE_LIBCTF_HASH_DEBUGGING, 1, [Enable expensive debugging of CTF deduplication type hashing]) 73fi 74AM_CONDITIONAL(ENABLE_LIBCTF_HASH_DEBUGGING, test "${enable_libctf_hash_debugging}" = yes) 75 76# Similar to GDB_AC_CHECK_BFD. 77OLD_CFLAGS=$CFLAGS 78OLD_LDFLAGS=$LDFLAGS 79OLD_LIBS=$LIBS 80# Put the old CFLAGS/LDFLAGS last, in case the user's (C|LD)FLAGS 81# points somewhere with bfd, with -I/foo/lib and -L/foo/lib. We 82# always want our bfd. 83CFLAGS="-I${srcdir}/../include -I../bfd -I${srcdir}/../bfd $CFLAGS" 84ZLIBDIR=`echo $zlibdir | sed 's,\$(top_builddir)/,,g'` 85LDFLAGS="-L../bfd -L../libiberty $ZLIBDIR $LDFLAGS" 86intl=`echo $LIBINTL | sed 's,${top_builddir}/,,g'` 87LIBS="-lbfd -liberty -lz $intl $LIBS" 88AC_CACHE_CHECK([for ELF support in BFD], ac_cv_libctf_bfd_elf, 89[AC_TRY_LINK([#include <stdlib.h> 90 #include "bfd.h" 91 #include "elf-bfd.h"], 92 [(void) bfd_section_from_elf_index (NULL, 0); 93 return 0;], 94 [ac_cv_libctf_bfd_elf=yes], 95 [ac_cv_libctf_bfd_elf=no])]) 96CFLAGS=$OLD_CFLAGS 97LDFLAGS=$OLD_LDFLAGS 98LIBS=$OLD_LIBS 99 100if test $ac_cv_libctf_bfd_elf = yes; then 101 AC_DEFINE([HAVE_BFD_ELF], 1, 102 [Whether libbfd was configured for an ELF target.]) 103fi 104 105AC_C_BIGENDIAN 106AC_CHECK_HEADERS(byteswap.h endian.h) 107AC_CHECK_FUNCS(pread) 108 109dnl Check for bswap_{16,32,64} 110AC_CHECK_DECLS([bswap_16, bswap_32, bswap_64], [], [], [[#include <byteswap.h>]]) 111AC_CHECK_DECLS([asprintf, vasprintf, stpcpy]) 112 113dnl Check for qsort_r. (Taken from gnulib.) 114AC_CHECK_FUNCS_ONCE([qsort_r]) 115if test $ac_cv_func_qsort_r = yes; then 116 AC_CACHE_CHECK([for qsort_r signature], [ac_cv_libctf_qsort_r_signature], 117 [AC_LINK_IFELSE( 118 [AC_LANG_PROGRAM([[#undef qsort_r 119 #include <stdlib.h> 120 void qsort_r (void *, size_t, size_t, 121 int (*) (void const *, void const *, 122 void *), 123 void *); 124 void (*p) (void *, size_t, size_t, 125 int (*) (void const *, void const *, 126 void *), 127 void *) = qsort_r; 128 ]])], 129 [ac_cv_libctf_qsort_r_signature=GNU], 130 [AC_LINK_IFELSE( 131 [AC_LANG_PROGRAM([[#undef qsort_r 132 #include <stdlib.h> 133 void qsort_r (void *, size_t, size_t, void *, 134 int (*) (void *, 135 void const *, 136 void const *)); 137 void (*p) (void *, size_t, size_t, void *, 138 int (*) (void *, void const *, 139 void const *)) = qsort_r; 140 ]])], 141 [ac_cv_libctf_qsort_r_signature=BSD], 142 [ac_cv_libctf_qsort_r_signature=unknown])])]) 143fi 144 145case x$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;; 151esac 152 153AM_CONDITIONAL(NEED_CTF_QSORT_R, test "${ac_cv_libctf_qsort_r_signature}" = unknown) 154 155AC_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 166if test $ac_cv_libctf_macro_O_CLOEXEC = yes; then 167 AC_DEFINE([HAVE_O_CLOEXEC], 1, 168 [Whether the platform has a definition of O_CLOEXEC.]) 169fi 170 171# Horrible hacks to build DLLs on Windows and a shared library elsewhere. 172SHARED_LIBADD= 173SHARED_LDFLAGS= 174BFD_LIBADD= 175BFD_DEPENDENCIES= 176if test "$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. 185changequote(,)dnl 186 x=`sed -n -e 's/^[ ]*PICFLAG[ ]*=[ ]*//p' < ../libiberty/Makefile | sed -n '$p'` 187changequote([,])dnl 188 if test -n "$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 216fi 217AC_SUBST(SHARED_LDFLAGS) 218AC_SUBST(SHARED_LIBADD) 219AC_SUBST(BFD_LIBADD) 220AC_SUBST(BFD_DEPENDENCIES) 221 222# Use a version script, if possible, or an -export-symbols-regex otherwise. 223VERSION_FLAGS='-export-symbols-regex ctf_.*' 224if $LD --help 2>&1 | grep -- --version-script >/dev/null; then 225 VERSION_FLAGS="-Wl,--version-script='$srcdir/libctf.ver'" 226fi 227AC_SUBST(VERSION_FLAGS) 228 229AC_CONFIG_FILES(Makefile) 230AC_CONFIG_HEADERS(config.h) 231AC_OUTPUT 232