1 dnl -*- Autoconf -*- 2 dnl Process this file with autoconf to produce a configure script. 3 dnl 4 dnl Copyright (C) 2019-2024 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], [1.2.0]) 23 AC_CONFIG_SRCDIR(ctf-impl.h) 24 AC_CANONICAL_BUILD 25 AC_CANONICAL_HOST 26 AC_CANONICAL_TARGET 27 AC_USE_SYSTEM_EXTENSIONS 28 AM_INIT_AUTOMAKE 29 AM_SILENT_RULES([yes]) 30 31 # Checks for programs. 32 AC_PROG_MAKE_SET 33 AC_PROG_CC 34 AC_PROG_RANLIB 35 AM_PROG_AR 36 ZW_GNU_GETTEXT_SISTER_DIR 37 38 dnl Default to a non shared library. This may be overridden by the 39 dnl configure option --enable-shared. 40 AC_DISABLE_SHARED 41 42 LT_INIT 43 AC_SYS_LARGEFILE 44 LT_OUTPUT 45 46 MISSING=`cd $ac_aux_dir && ${PWDCMD-pwd}`/missing 47 AC_CHECK_PROGS([ACLOCAL], [aclocal], [$MISSING aclocal]) 48 AC_CHECK_PROGS([AUTOCONF], [autoconf], [$MISSING autoconf]) 49 AC_CHECK_PROGS([AUTOHEADER], [autoheader], [$MISSING autoheader]) 50 51 # Figure out what compiler warnings we can enable. 52 # See config/warnings.m4 for details. 53 54 ACX_PROG_CC_WARNING_OPTS([-W -Wall -Wno-narrowing -Wwrite-strings \ 55 -Wmissing-format-attribute], [warn]) 56 ACX_PROG_CC_WARNING_OPTS([-Wstrict-prototypes -Wmissing-prototypes \ 57 -Wold-style-definition], [c_warn]) 58 ACX_PROG_CC_WARNING_ALMOST_PEDANTIC([-Wno-long-long]) 59 60 # Only enable with --enable-werror-always until existing warnings are 61 # corrected. 62 ACX_PROG_CC_WARNINGS_ARE_ERRORS([manual]) 63 64 AM_MAINTAINER_MODE 65 AM_INSTALL_LIBBFD 66 ACX_PROG_CC_WARNING_OPTS([-Wall], [ac_libctf_warn_cflags]) 67 68 GCC_AC_FUNC_MMAP 69 # Needed for BFD capability checks. 70 AC_SEARCH_LIBS(dlsym, dl) 71 AM_ZLIB 72 73 GCC_ENABLE([libctf-hash-debugging], [no], [], [Enable expensive debugging of CTF deduplication type hashing]) 74 if test "${enable_libctf_hash_debugging}" = yes; then 75 AC_DEFINE(ENABLE_LIBCTF_HASH_DEBUGGING, 1, [Enable expensive debugging of CTF deduplication type hashing]) 76 fi 77 AM_CONDITIONAL(ENABLE_LIBCTF_HASH_DEBUGGING, test "${enable_libctf_hash_debugging}" = yes) 78 79 # Similar to GDB_AC_CHECK_BFD. 80 OLD_CFLAGS=$CFLAGS 81 OLD_LDFLAGS=$LDFLAGS 82 OLD_LIBS=$LIBS 83 OLD_CC=$CC 84 # Put the old CFLAGS/LDFLAGS last, in case the user's (C|LD)FLAGS 85 # points somewhere with bfd, with -I/foo/lib and -L/foo/lib. We 86 # always want our bfd. 87 CC="./libtool --quiet --mode=link $OLD_CC" 88 CFLAGS="-I${srcdir}/../include -I../bfd -I${srcdir}/../bfd $CFLAGS" 89 LDFLAGS="-L../bfd -L../libiberty $LDFLAGS" 90 intl=`echo $LIBINTL | sed 's,${top_builddir}/,,g'` 91 LIBS="-lbfd -liberty $intl $LIBS" 92 AC_CACHE_CHECK([for ELF support in BFD], ac_cv_libctf_bfd_elf, 93 [AC_TRY_LINK([#include <stdlib.h> 94 #include <string.h> 95 #include "bfd.h" 96 #include "elf-bfd.h"], 97 [(void) bfd_section_from_elf_index (NULL, 0); 98 return 0;], 99 [ac_cv_libctf_bfd_elf=yes], 100 [ac_cv_libctf_bfd_elf=no])]) 101 CFLAGS=$OLD_CFLAGS 102 LDFLAGS=$OLD_LDFLAGS 103 LIBS=$OLD_LIBS 104 CC=$OLD_CC 105 106 if test $ac_cv_libctf_bfd_elf = yes; then 107 AC_DEFINE([HAVE_BFD_ELF], 1, 108 [Whether libbfd was configured for an ELF target.]) 109 fi 110 111 AC_C_BIGENDIAN 112 AC_CHECK_HEADERS(byteswap.h endian.h valgrind/valgrind.h) 113 AC_CHECK_FUNCS(pread) 114 115 dnl Check for bswap_{16,32,64} 116 AC_CHECK_DECLS([bswap_16, bswap_32, bswap_64], [], [], [[#include <byteswap.h>]]) 117 AC_CHECK_DECLS([asprintf, vasprintf, stpcpy]) 118 119 dnl Check for qsort_r. (Taken from gnulib.) 120 AC_CHECK_FUNCS_ONCE([qsort_r]) 121 if test $ac_cv_func_qsort_r = yes; then 122 AC_CACHE_CHECK([for qsort_r signature], [ac_cv_libctf_qsort_r_signature], 123 [AC_LINK_IFELSE( 124 [AC_LANG_PROGRAM([[#undef qsort_r 125 #include <stdlib.h> 126 void qsort_r (void *, size_t, size_t, 127 int (*) (void const *, void const *, 128 void *), 129 void *); 130 void (*p) (void *, size_t, size_t, 131 int (*) (void const *, void const *, 132 void *), 133 void *) = qsort_r; 134 ]])], 135 [ac_cv_libctf_qsort_r_signature=GNU], 136 [AC_LINK_IFELSE( 137 [AC_LANG_PROGRAM([[#undef qsort_r 138 #include <stdlib.h> 139 void qsort_r (void *, size_t, size_t, void *, 140 int (*) (void *, 141 void const *, 142 void const *)); 143 void (*p) (void *, size_t, size_t, void *, 144 int (*) (void *, void const *, 145 void const *)) = qsort_r; 146 ]])], 147 [ac_cv_libctf_qsort_r_signature=BSD], 148 [ac_cv_libctf_qsort_r_signature=unknown])])]) 149 fi 150 151 case x$ac_cv_libctf_qsort_r_signature in 152 xGNU) AC_DEFINE([HAVE_QSORT_R_ARG_LAST], 1, 153 [Whether a qsort_r exists with a void *arg as its last arg.]);; 154 xBSD) AC_DEFINE([HAVE_QSORT_R_COMPAR_LAST], 1, 155 [Whether a qsort_r exists with the compar function as its last arg.]);; 156 *) ac_cv_libctf_qsort_r_signature=unknown;; 157 esac 158 159 AM_CONDITIONAL(NEED_CTF_QSORT_R, test "${ac_cv_libctf_qsort_r_signature}" = unknown) 160 161 AC_CACHE_CHECK([for O_CLOEXEC], [ac_cv_libctf_macro_O_CLOEXEC], 162 [AC_LINK_IFELSE( 163 [AC_LANG_PROGRAM([[#include <fcntl.h> 164 #ifndef O_CLOEXEC 165 choke me; 166 #endif 167 ]], 168 [[return O_CLOEXEC;]])], 169 [ac_cv_libctf_macro_O_CLOEXEC=yes], 170 [ac_cv_libctf_macro_O_CLOEXEC=no])]) 171 172 if test $ac_cv_libctf_macro_O_CLOEXEC = yes; then 173 AC_DEFINE([HAVE_O_CLOEXEC], 1, 174 [Whether the platform has a definition of O_CLOEXEC.]) 175 fi 176 177 build_info= 178 makeinfo_too_old= 179 AC_CHECK_PROGS([MAKEINFO], makeinfo, [$MISSING makeinfo]) 180 case " $build_configdirs " in 181 *" texinfo "*) MAKEINFO='$$r/$(BUILD_SUBDIR)/texinfo/makeinfo/makeinfo' ;; 182 esac 183 changequote(,) 184 # We require texinfo to be 6.3 or later, for a working synindex 185 # and validatemenus: otherwise we fall back to /bin/true. 186 if ${MAKEINFO} --version \ 187 | egrep 'texinfo[^0-9]*(6\.[3-9]|[7-9]|[1-6][0-9])' >/dev/null 2>&1; then 188 build_info=yes 189 else 190 build_info= 191 makeinfo_too_old=t 192 fi 193 changequote([,]) 194 if test -n "$makeinfo_too_old"; then 195 AC_MSG_WARN([ 196 *** Makeinfo is too old. Info documentation will not be built.]) 197 fi 198 AC_SUBST(MAKEINFO) 199 AM_CONDITIONAL(BUILD_INFO, test "${build_info}" = yes) 200 201 CTF_LIBADD="-L`pwd`/../libiberty -liberty" 202 SHARED_LDFLAGS= 203 204 # Horrible hacks to build DLLs on Windows and a shared library elsewhere. 205 if test "$enable_shared" = "yes"; then 206 # When building a shared libctf, link against the pic version of libiberty 207 # so that apps that use libctf won't need libiberty just to satisfy any 208 # libctf references. We can't do that if a pic libiberty is unavailable 209 # since including non-pic # code would insert text relocations into libctf. 210 # Note that linking against libbfd as we do here, which is itself linked 211 # against libiberty, may not satisfy all the libctf libiberty references 212 # since libbfd may not pull in the entirety of libiberty. 213 # Also, jam libintl into the right place in all of this: after libiberty, 214 # which uses it, but before -lcygwin, which it uses. 215 changequote(,)dnl 216 x=`sed -n -e 's/^[ ]*PICFLAG[ ]*=[ ]*//p' < ../libiberty/Makefile | sed -n '$p'` 217 changequote([,])dnl 218 if test -n "$x"; then 219 CTF_LIBADD="-L`pwd`/../libiberty/pic -liberty" 220 fi 221 fi 222 223 CTF_LIBADD="$CTF_LIBADD $LTLIBINTL" 224 225 if test "$enable_shared" = "yes"; then 226 case "${host}" in 227 # More hacks to build DLLs on Windows. 228 *-*-cygwin*) 229 SHARED_LDFLAGS="-no-undefined" 230 CTF_LIBADD="$CTF_LIBADD -lcygwin" 231 ;; 232 esac 233 fi 234 AC_SUBST(SHARED_LDFLAGS) 235 AC_SUBST(CTF_LIBADD) 236 237 AC_PATH_PROG([EXPECT], [expect]) 238 AC_CACHE_CHECK([for Tcl supporting try/catch], [ac_cv_libctf_tcl_try], 239 [ac_cv_libctf_tcl_try=`if test -z $EXPECT; then echo no; else $EXPECT << EOF 240 if @<:@llength @<:@info commands try@:>@@:>@ then { puts yes } else { puts no } 241 EOF 242 fi` 243 ]) 244 245 HAVE_TCL_TRY=false 246 if test "${ac_cv_libctf_tcl_try}" = "yes"; then 247 HAVE_TCL_TRY=true 248 fi 249 AC_SUBST(HAVE_TCL_TRY) 250 251 # Use a version script, if possible, or an -export-symbols-regex otherwise. 252 # First figure out the version script flag: then massage the script, if 253 # needed. 254 decommented_version_script= 255 no_version_script= 256 AC_CACHE_CHECK([for linker versioning flags], [ac_cv_libctf_version_script], 257 [echo 'FOO { global: mai*; local: ctf_fo*; };' > conftest.ver 258 old_LDFLAGS="$LDFLAGS" 259 old_CFLAGS="$CFLAGS" 260 LDFLAGS="$LDFLAGS -shared -Wl,--version-script=conftest.ver" 261 CFLAGS="$CFLAGS -fPIC" 262 AC_LINK_IFELSE([AC_LANG_SOURCE([[int ctf_foo (void) { return 0; } 263 int main (void) { return ctf_foo(); }]])], 264 [ac_cv_libctf_version_script="-Wl,--version-script"], 265 []) 266 LDFLAGS="$old_LDFLAGS" 267 268 if test -z "$ac_cv_libctf_version_script"; then 269 LDFLAGS="$LDFLAGS -shared -Wl,-B,local -Wl,-z,gnu-version-script=conftest.ver" 270 AC_LINK_IFELSE([AC_LANG_SOURCE([[int ctf_foo (void) { return 0; } 271 int main (void) { return ctf_foo(); }]])], 272 [ac_cv_libctf_version_script="-Wl,-B,local -Wl,-z,gnu-version-script" 273 decommented_version_script=t], 274 []) 275 LDFLAGS="$old_LDFLAGS" 276 fi 277 CFLAGS="$old_CFLAGS" 278 279 if test -z "$ac_cv_libctf_version_script"; then 280 ac_cv_libctf_version_script='-export-symbols-regex ctf_.*' 281 no_version_script=t 282 fi 283 rm -f conftest.ver]) 284 285 # Ensure that no symbols exist in the version script for libctf-nobfd.so 286 # that do not exist in the shared library itself, since some linkers (Solaris) 287 # add such symbols with type NOTYPE, and others (LLVM) complain loudly 288 # and fail to link. 289 grep -v 'libctf only' $srcdir/libctf.ver > libctf-nobfd.ver 290 291 if test -n "$decommented_version_script"; then 292 # Solaris's version scripts use shell-style comments rather than the C-style 293 # used by GNU ld. Use cpp to strip the comments out. (cpp exists under this 294 # name on all platforms that support ld -z gnu-version-script.) 295 /lib/cpp < $srcdir/libctf.ver > libctf-decommented.ver 296 /lib/cpp < $srcdir/libctf-nobfd.ver > libctf-nobfd-decommented.ver 297 VERSION_FLAGS="$ac_cv_libctf_version_script='libctf-decommented.ver'" 298 VERSION_FLAGS_NOBFD="$ac_cv_libctf_version_script='libctf-nobfd-decommented.ver'" 299 elif test -z "$no_version_script"; then 300 VERSION_FLAGS="$ac_cv_libctf_version_script='$srcdir/libctf.ver'" 301 VERSION_FLAGS_NOBFD="$ac_cv_libctf_version_script='libctf-nobfd.ver'" 302 else 303 VERSION_FLAGS="$ac_cv_libctf_version_script" 304 VERSION_FLAGS_NOBFD="$ac_cv_libctf_version_script" 305 fi 306 AC_SUBST(VERSION_FLAGS) 307 AC_SUBST(VERSION_FLAGS_NOBFD) 308 309 AC_CONFIG_FILES(Makefile) 310 AC_CONFIG_HEADERS(config.h) 311 AC_OUTPUT 312 313 GNU_MAKE_JOBSERVER 314
Indexes created Fri Aug 07 00:26:27 UTC 2026