1 dnl Process this file with autoconf to produce a configure script.
2 dnl Configure input file for elfutils. -*-autoconf-*-
4 dnl Copyright (C) 1996-2017 Red Hat, Inc.
6 dnl This file is part of elfutils.
8 dnl This file is free software; you can redistribute it and/or modify
9 dnl it under the terms of the GNU General Public License as published by
10 dnl the Free Software Foundation; either version 3 of the License, or
11 dnl (at your option) any later version.
13 dnl elfutils is distributed in the hope that it will be useful, but
14 dnl WITHOUT ANY WARRANTY; without even the implied warranty of
15 dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 dnl GNU General Public License for more details.
18 dnl You should have received a copy of the GNU General Public License
19 dnl along with this program. If not, see <http://www.gnu.org/licenses/>.
20 AC_INIT([elfutils],[0.170],[https://sourceware.org/bugzilla],[elfutils],[http://elfutils.org/])
22 dnl Workaround for older autoconf < 2.64
23 m4_ifndef([AC_PACKAGE_URL],
24 [AC_DEFINE([PACKAGE_URL], ["http://elfutils.org/"],
25 [Define to home page for this package])
26 AC_SUBST([PACKAGE_URL], ["http://elfutils.org/"])])
28 # We want eu- as default program prefix if none was given by the user.
29 # But if the user explicitly provided --program-prefix="" then pretend
30 # it wasn't set at all (NONE). We want to test this really early before
31 # configure has a chance to use the value.
33 if test "x$program_prefix" = "xNONE"; then
34 AC_MSG_NOTICE([No --program-prefix given, using "eu-"])
36 elif test "x$program_prefix" = "x"; then
37 AC_MSG_NOTICE([Using no program-prefix])
41 AC_CONFIG_AUX_DIR([config])
42 AC_CONFIG_FILES([config/Makefile])
44 AC_COPYRIGHT([Copyright (C) 1996-2017 The elfutils developers.])
45 AC_PREREQ(2.63) dnl Minimum Autoconf version required.
47 dnl We use GNU make extensions; automake 1.10 defaults to -Wportability.
48 AM_INIT_AUTOMAKE([gnits 1.11 -Wno-portability dist-bzip2 no-dist-gzip parallel-tests])
51 AM_SILENT_RULES([yes])
53 AC_CONFIG_SRCDIR([libelf/libelf.h])
54 AC_CONFIG_FILES([Makefile])
55 AC_CONFIG_HEADERS([config.h])
57 AC_CONFIG_MACRO_DIR([m4])
58 AC_CONFIG_FILES([m4/Makefile])
60 dnl The RPM spec file. We substitute a few values in the file.
61 AC_CONFIG_FILES([elfutils.spec:config/elfutils.spec.in])
66 AC_ARG_ENABLE(deterministic-archives,
67 [AS_HELP_STRING([--enable-deterministic-archives],
68 [ar and ranlib default to -D behavior])], [
69 if test "${enableval}" = no; then
70 default_ar_deterministic=false
72 default_ar_deterministic=true
73 fi], [default_ar_deterministic=false])
74 AC_DEFINE_UNQUOTED(DEFAULT_AR_DETERMINISTIC, $default_ar_deterministic,
75 [Should ar and ranlib use -D behavior by default?])
77 AC_ARG_ENABLE([thread-safety],
78 AS_HELP_STRING([--enable-thread-safety],
79 [enable thread safety of libraries EXPERIMENTAL]),
80 use_locks=$enableval, use_locks=no)
81 AM_CONDITIONAL(USE_LOCKS, test "$use_locks" = yes)
82 AS_IF([test "$use_locks" = yes], [AC_DEFINE(USE_LOCKS)])
83 AS_IF([test "$use_locks" = yes],
84 [AC_MSG_WARN([thread-safety is EXPERIMENTAL tests might fail.])])
86 AH_TEMPLATE([USE_LOCKS], [Defined if libraries should be thread-safe.])
92 # Only available since automake 1.12
93 m4_ifdef([AM_PROG_AR], [AM_PROG_AR])
94 AC_CHECK_TOOL([READELF], [readelf])
95 AC_CHECK_TOOL([NM], [nm])
97 # We use -std=gnu99 but have explicit checks for some language constructs
98 # and GNU extensions since some compilers claim GNU99 support, but don't
99 # really support all language extensions. In particular we need
100 # Mixed Declarations and Code
101 # https://gcc.gnu.org/onlinedocs/gcc/Mixed-Declarations.html
103 # https://gcc.gnu.org/onlinedocs/gcc/Nested-Functions.html
104 # Arrays of Variable Length
105 # https://gcc.gnu.org/onlinedocs/gcc/Variable-Length.html
106 AC_CACHE_CHECK([for gcc with GNU99 support], ac_cv_c99, [dnl
108 CFLAGS="$CFLAGS -std=gnu99"
109 AC_COMPILE_IFELSE([AC_LANG_SOURCE([dnl
112 for (int i = 0; i < a; ++i) if (i % 4) break; int s = a; return s;
115 double bar (double a, double b)
117 double square (double z) { return z * z; }
118 return square (a) + square (b);
123 struct S { int x[[n]]; };
125 ac_cv_c99=yes, ac_cv_c99=no)
126 CFLAGS="$old_CFLAGS"])
127 AS_IF([test "x$ac_cv_c99" != xyes],
128 AC_MSG_ERROR([gcc with GNU99 support required]))
130 AC_CACHE_CHECK([whether gcc supports __attribute__((visibility()))],
131 ac_cv_visibility, [dnl
132 save_CFLAGS="$CFLAGS"
133 CFLAGS="$save_CFLAGS -Werror"
134 AC_COMPILE_IFELSE([AC_LANG_SOURCE([dnl
135 int __attribute__((visibility("hidden")))
139 }])], ac_cv_visibility=yes, ac_cv_visibility=no)
140 CFLAGS="$save_CFLAGS"])
141 if test "$ac_cv_visibility" = "yes"; then
142 AC_DEFINE([HAVE_VISIBILITY], [1],
143 [Defined if __attribute__((visibility())) is supported])
146 AC_CACHE_CHECK([whether gcc supports -fPIC], ac_cv_fpic, [dnl
147 save_CFLAGS="$CFLAGS"
148 CFLAGS="$save_CFLAGS -fPIC -Werror"
149 AC_COMPILE_IFELSE([AC_LANG_SOURCE()], ac_cv_fpic=yes, ac_cv_fpic=no)
150 CFLAGS="$save_CFLAGS"
152 if test "$ac_cv_fpic" = "yes"; then
157 AC_SUBST([fpic_CFLAGS])
159 AC_CACHE_CHECK([whether gcc supports -fPIE], ac_cv_fpie, [dnl
160 save_CFLAGS="$CFLAGS"
161 CFLAGS="$save_CFLAGS -fPIE -Werror"
162 AC_COMPILE_IFELSE([AC_LANG_SOURCE()], ac_cv_fpie=yes, ac_cv_fpie=no)
163 CFLAGS="$save_CFLAGS"
165 if test "$ac_cv_fpie" = "yes"; then
170 AC_SUBST([fpie_CFLAGS])
172 dso_LDFLAGS="-shared"
174 ZDEFS_LDFLAGS="-Wl,-z,defs"
175 AC_CACHE_CHECK([whether gcc supports $ZDEFS_LDFLAGS], ac_cv_zdefs, [dnl
176 save_LDFLAGS="$LDFLAGS"
177 LDFLAGS="$ZDEFS_LDFLAGS $save_LDFLAGS"
178 AC_LINK_IFELSE([AC_LANG_PROGRAM()], ac_cv_zdefs=yes, ac_cv_zdefs=no)
179 LDFLAGS="$save_LDFLAGS"
181 if test "$ac_cv_zdefs" = "yes"; then
182 dso_LDFLAGS="$dso_LDFLAGS $ZDEFS_LDFLAGS"
185 ZRELRO_LDFLAGS="-Wl,-z,relro"
186 AC_CACHE_CHECK([whether gcc supports $ZRELRO_LDFLAGS], ac_cv_zrelro, [dnl
187 save_LDFLAGS="$LDFLAGS"
188 LDFLAGS="$ZRELRO_LDFLAGS $save_LDFLAGS"
189 AC_LINK_IFELSE([AC_LANG_PROGRAM()], ac_cv_zrelro=yes, ac_cv_zrelro=no)
190 LDFLAGS="$save_LDFLAGS"
192 if test "$ac_cv_zrelro" = "yes"; then
193 dso_LDFLAGS="$dso_LDFLAGS $ZRELRO_LDFLAGS"
196 AC_SUBST([dso_LDFLAGS])
198 AC_CACHE_CHECK([for __thread support], ac_cv_tls, [dnl
199 # Use the same flags that we use for our DSOs, so the test is representative.
200 # Some old compiler/linker/libc combinations fail some ways and not others.
201 save_CFLAGS="$CFLAGS"
202 save_LDFLAGS="$LDFLAGS"
203 CFLAGS="$fpic_CFLAGS $CFLAGS"
204 LDFLAGS="$dso_LDFLAGS $LDFLAGS"
206 AC_LANG_PROGRAM([[#include <stdlib.h>
208 static __thread int a; int foo (int b) { return a + b; }]],
209 [[exit (foo (0));]])],
210 ac_cv_tls=yes, ac_cv_tls=no)
211 CFLAGS="$save_CFLAGS"
212 LDFLAGS="$save_LDFLAGS"])
213 AS_IF([test "x$ac_cv_tls" != xyes],
214 AC_MSG_ERROR([__thread support required]))
216 dnl This test must come as early as possible after the compiler configuration
217 dnl tests, because the choice of the file model can (in principle) affect
218 dnl whether functions and headers are available, whether they work, etc.
221 dnl Older glibc had a broken fts that didn't work with Large File Systems.
222 dnl We want the version that can handler LFS, but include workaround if we
223 dnl get a bad one. Add define to CFLAGS (not AC_DEFINE it) since we need to
224 dnl check it before including config.h (which might define _FILE_OFFSET_BITS).
225 AC_CACHE_CHECK([whether fts.h is bad when included (with LFS)], ac_cv_bad_fts,
226 [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[#include <fts.h>]])],
227 ac_cv_bad_fts=no, ac_cv_bad_fts=yes)])
228 AS_IF([test "x$ac_cv_bad_fts" = "xyes"], [CFLAGS="$CFLAGS -DBAD_FTS=1"])
230 # See if we can add -D_FORTIFY_SOURCE=2. Don't do it if it is already
231 # (differently) defined or if it generates warnings/errors because we
232 # don't use the right optimisation level (string.h will warn about that).
233 AC_MSG_CHECKING([whether to add -D_FORTIFY_SOURCE=2 to CFLAGS])
235 *-D_FORTIFY_SOURCE=2*)
236 AC_MSG_RESULT([no, already there])
239 save_CFLAGS="$CFLAGS"
240 CFLAGS="-D_FORTIFY_SOURCE=2 -Werror $CFLAGS"
241 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
243 int main() { return 0; }
244 ]])], [ AC_MSG_RESULT([yes])
245 CFLAGS="-D_FORTIFY_SOURCE=2 $save_CFLAGS" ],
246 [ AC_MSG_RESULT([no])
247 CFLAGS="$save_CFLAGS"])
251 dnl enable debugging of branch prediction.
252 AC_ARG_ENABLE([debugpred],
253 AS_HELP_STRING([--enable-debugpred],[build binaries with support to debug branch prediction]),
254 [use_debugpred=$enableval], [use_debugpred=no])
255 case $use_debugpred in
256 yes) use_debugpred_val=1 ;;
257 *) use_debugpred_val=0 ;;
259 AC_SUBST([DEBUGPRED], $use_debugpred_val)
261 dnl Enable gprof suport.
262 AC_ARG_ENABLE([gprof],
263 AS_HELP_STRING([--enable-gprof],[build binaries with gprof support]), [use_gprof=$enableval], [use_gprof=no])
264 if test "$use_gprof" = yes; then
266 LDFLAGS="$LDFLAGS -pg"
268 AM_CONDITIONAL(GPROF, test "$use_gprof" = yes)
270 # Enable gcov suport.
271 AC_ARG_ENABLE([gcov],
272 AS_HELP_STRING([--enable-gcov],[build binaries with gcov support]), [use_gcov=$enableval], [use_gcov=no])
273 if test "$use_gcov" = yes; then
274 CFLAGS="$CFLAGS -fprofile-arcs -ftest-coverage"
275 LDFLAGS="$LDFLAGS -fprofile-arcs"
277 AM_CONDITIONAL(GCOV, test "$use_gcov" = yes)
279 AC_ARG_ENABLE([sanitize-undefined],
280 AS_HELP_STRING([--enable-sanitize-undefined],
281 [Use gcc undefined behaviour sanitizer]),
282 [use_undefined=$enableval], [use_undefined=no])
283 if test "$use_undefined" = yes; then
285 old_CXXFLAGS="$CXXFLAGS"
286 # We explicitly use unaligned access when possible (see ALLOW_UNALIGNED)
287 # We want to fail immediately on first error, don't try to recover.
288 CFLAGS="$CFLAGS -fsanitize=undefined -fno-sanitize-recover"
289 CXXFLAGS="$CXXFLAGS -fsanitize=undefined -fno-sanitize-recover"
290 AC_LINK_IFELSE([AC_LANG_SOURCE([int main (int argc, char **argv) { return 0; }])], use_undefined=yes, use_undefined=no)
291 AS_IF([test "x$use_undefined" != xyes],
292 AC_MSG_WARN([gcc undefined behaviour sanitizer not available])
293 CFLAGS="$old_CFLAGS" CXXFLAGS="$old_CXXFLAGS")
295 case $use_undefined in
296 yes) check_undefined_val=1 ;;
297 *) check_undefined_val=0 ;;
299 AC_DEFINE_UNQUOTED(CHECK_UNDEFINED, $check_undefined_val,
300 [Building with -fsanitize=undefined or not])
302 AC_ARG_ENABLE([valgrind],
303 AS_HELP_STRING([--enable-valgrind],[run all tests under valgrind]),
304 [use_valgrind=$enableval], [use_valgrind=no])
305 if test "$use_valgrind" = yes; then
306 AC_CHECK_PROG(HAVE_VALGRIND, valgrind, yes, no)
307 if test "$HAVE_VALGRIND" = "no"; then
308 AC_MSG_ERROR([valgrind not found])
311 AM_CONDITIONAL(USE_VALGRIND, test "$use_valgrind" = yes)
313 AM_CONDITIONAL(BUILD_STATIC, [dnl
314 test "$use_gprof" = yes -o "$use_gcov" = yes])
316 AC_ARG_ENABLE([tests-rpath],
317 AS_HELP_STRING([--enable-tests-rpath],[build $ORIGIN-using rpath into tests]),
318 [tests_use_rpath=$enableval], [tests_use_rpath=no])
319 AM_CONDITIONAL(TESTS_RPATH, test "$tests_use_rpath" = yes)
321 LIBEBL_SUBDIR="$PACKAGE"
322 AC_ARG_ENABLE([libebl-subdir],
323 AS_HELP_STRING([--enable-libebl-subdir=DIR],
324 [install libebl_CPU modules in $(libdir)/DIR]), [dnl
325 LIBEBL_SUBDIR="$enable_libebl_subdir"])
326 AC_SUBST([LIBEBL_SUBDIR])
327 AC_DEFINE_UNQUOTED(LIBEBL_SUBDIR, "$LIBEBL_SUBDIR")
328 AH_TEMPLATE([LIBEBL_SUBDIR], [$libdir subdirectory containing libebl modules.])
330 dnl zlib is mandatory.
333 eu_ZIPLIB(zlib,ZLIB,z,gzdirect,gzip)
334 AS_IF([test "x$with_zlib" = xno], [AC_MSG_ERROR([zlib not found but is required])])
337 dnl Test for bzlib and xz/lzma, gives BZLIB/LZMALIB .am
338 dnl conditional and config.h USE_BZLIB/USE_LZMALIB #define.
341 eu_ZIPLIB(bzlib,BZLIB,bz2,BZ2_bzdopen,bzip2)
342 # We need this since bzip2 doesn't have a pkgconfig file.
345 eu_ZIPLIB(lzma,LZMA,lzma,lzma_auto_decoder,[LZMA (xz)])
346 AS_IF([test "x$with_lzma" = xyes], [LIBLZMA="liblzma"], [LIBLZMA=""])
352 AC_CHECK_DECLS([memrchr, rawmemchr],[],[],
354 #include <string.h>])
355 AC_CHECK_DECLS([powerof2],[],[],[#include <sys/param.h>])
356 AC_CHECK_DECLS([mempcpy],[],[],
358 #include <string.h>])
360 AC_CHECK_LIB([stdc++], [__cxa_demangle], [dnl
361 AC_DEFINE([USE_DEMANGLE], [1], [Defined if demangling is enabled])])
362 AM_CONDITIONAL(DEMANGLE, test "x$ac_cv_lib_stdcpp___cxa_demangle" = "xyes")
363 AS_IF([test "x$ac_cv_lib_stdcpp___cxa_demangle" = "xyes"],
364 [enable_demangler=yes],[enable_demangler=no])
366 AC_ARG_ENABLE([textrelcheck],
367 AS_HELP_STRING([--disable-textrelcheck],
368 [Disable textrelcheck being a fatal error]))
369 AM_CONDITIONAL(FATAL_TEXTREL, [test "x$enable_textrelcheck" != "xno"])
370 AS_IF([test "x$enable_textrelcheck" != "xno"],
371 [enable_textrelcheck=yes],[enable_textrelcheck=no])
373 AC_ARG_ENABLE([symbol-versioning],
374 AS_HELP_STRING([--disable-symbol-versioning],
375 [Disable symbol versioning in shared objects]))
376 AM_CONDITIONAL(SYMBOL_VERSIONING, [test "x$enable_symbol_versioning" != "xno"])
377 AS_IF([test "x$enable_symbol_versioning" = "xno"],
378 [AC_MSG_WARN([Disabling symbol versioning breaks ABI compatibility.])
379 enable_symbol_versioning=no],[enable_symbol_versioning=yes])
381 AC_CACHE_CHECK([whether gcc accepts -Wstack-usage], ac_cv_stack_usage, [dnl
383 CFLAGS="$CFLAGS -Wstack-usage=262144 -Werror"
384 AC_COMPILE_IFELSE([AC_LANG_SOURCE([])],
385 ac_cv_stack_usage=yes, ac_cv_stack_usage=no)
386 CFLAGS="$old_CFLAGS"])
387 AM_CONDITIONAL(ADD_STACK_USAGE_WARNING, [test "x$ac_cv_stack_usage" != "xno"])
389 # -Wlogical-op was too fragile in the past, make sure we get a sane one.
390 AC_CACHE_CHECK([whether gcc has a sane -Wlogical-op], ac_cv_logical_op, [dnl
392 CFLAGS="$CFLAGS -Wlogical-op -Werror"
393 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
395 int f (int r, int f) { return (r && (FLAG || (FLAG & f))); }])],
396 ac_cv_logical_op=yes, ac_cv_logical_op=no)
397 CFLAGS="$old_CFLAGS"])
398 AM_CONDITIONAL(SANE_LOGICAL_OP_WARNING,
399 [test "x$ac_cv_logical_op" != "xno"])
401 # -Wduplicated-cond was added by GCC6
402 AC_CACHE_CHECK([whether gcc accepts -Wduplicated-cond], ac_cv_duplicated_cond, [dnl
404 CFLAGS="$CFLAGS -Wduplicated-cond -Werror"
405 AC_COMPILE_IFELSE([AC_LANG_SOURCE([])],
406 ac_cv_duplicated_cond=yes, ac_cv_duplicated_cond=no)
407 CFLAGS="$old_CFLAGS"])
408 AM_CONDITIONAL(HAVE_DUPLICATED_COND_WARNING,
409 [test "x$ac_cv_duplicated_cond" != "xno"])
411 # -Wnull-dereference was added by GCC6
412 AC_CACHE_CHECK([whether gcc accepts -Wnull-dereference], ac_cv_null_dereference, [dnl
414 CFLAGS="$CFLAGS -Wnull-dereference -Werror"
415 AC_COMPILE_IFELSE([AC_LANG_SOURCE([])],
416 ac_cv_null_dereference=yes, ac_cv_null_dereference=no)
417 CFLAGS="$old_CFLAGS"])
418 AM_CONDITIONAL(HAVE_NULL_DEREFERENCE_WARNING,
419 [test "x$ac_cv_null_dereference" != "xno"])
421 # -Wimplicit-fallthrough was added by GCC7
422 AC_CACHE_CHECK([whether gcc accepts -Wimplicit-fallthrough], ac_cv_implicit_fallthrough, [dnl
424 CFLAGS="$CFLAGS -Wimplicit-fallthrough -Werror"
425 AC_COMPILE_IFELSE([AC_LANG_SOURCE([])],
426 ac_cv_implicit_fallthrough=yes, ac_cv_implicit_fallthrough=no)
427 CFLAGS="$old_CFLAGS"])
428 AM_CONDITIONAL(HAVE_IMPLICIT_FALLTHROUGH_WARNING,
429 [test "x$ac_cv_implicit_fallthrough" != "xno"])
431 dnl Check if we have argp available from our libc
435 [int argc=1; char *argv[]={"test"}; argp_parse(0,argc,&argv,0,0,0); return 0;]
437 [libc_has_argp="true"],
438 [libc_has_argp="false"]
441 dnl If our libc doesn't provide argp, then test for libargp
442 if test "$libc_has_argp" = "false" ; then
443 AC_MSG_WARN("libc does not have argp")
444 AC_CHECK_LIB([argp], [argp_parse], [have_argp="true"], [have_argp="false"])
446 if test "$have_argp" = "false"; then
447 AC_MSG_ERROR("no libargp found")
454 AC_SUBST([argp_LDADD])
456 dnl The directories with content.
459 dnl Commented out for now.
460 dnl AC_CONFIG_FILES([doc/Makefile])
463 AC_CONFIG_FILES([lib/Makefile])
466 AC_CONFIG_FILES([libelf/Makefile])
468 dnl Higher-level ELF support library.
469 AC_CONFIG_FILES([libebl/Makefile])
471 dnl DWARF-ELF Lower-level Functions support library.
472 AC_CONFIG_FILES([libdwelf/Makefile])
475 AC_CONFIG_FILES([libdw/Makefile])
477 dnl Higher-level DWARF support library.
478 AC_CONFIG_FILES([libdwfl/Makefile])
480 dnl CPU handling library.
481 AC_CONFIG_FILES([libcpu/Makefile])
483 dnl Assembler library.
484 AM_CONDITIONAL(HAVE_LIBASM, true)dnl Used in tests/Makefile.am, which see.
485 AC_CONFIG_FILES([libasm/Makefile])
487 dnl CPU-specific backend libraries.
488 AC_CONFIG_FILES([backends/Makefile])
491 AC_CONFIG_FILES([src/Makefile po/Makefile.in])
494 AM_CONDITIONAL(STANDALONE, false)dnl Used in tests/Makefile.am, which see.
495 AC_CONFIG_FILES([tests/Makefile])
498 AC_CONFIG_FILES([config/libelf.pc config/libdw.pc])
500 # Get the definitions necessary to create the Makefiles in the po
501 # subdirectories. This is a small subset of the gettext rules.
502 AC_SUBST(USE_NLS, yes)
505 dnl Appended to the config.h file.
506 dnl We hide all kinds of configuration magic in lib/eu-config.h.
507 AH_BOTTOM([#include <eu-config.h>])
509 dnl Version compatibility header.
510 AC_CONFIG_FILES([version.h:config/version.h.in])
511 AC_SUBST([eu_version])
513 # 1.234<whatever> -> 1234<whatever>
514 case "$PACKAGE_VERSION" in
515 [[0-9]].*) eu_version=`echo "$PACKAGE_VERSION" | sed 's@\.@@'` ;;
516 *) AC_MSG_ERROR([confused by version number '$PACKAGE_VERSION']) ;;
518 case "$eu_version" in
520 # 1234.567 -> "1234", "567"
521 eu_extra_version="${eu_version#*.}"
522 eu_version="${eu_version%%.*}"
523 case "$eu_extra_version" in
524 [[0-9]][[0-9]][[0-9]]) ;;
525 [[0-9]][[0-9]]) eu_extra_version="${eu_extra_version}0" ;;
526 [[0-9]]) eu_extra_version="${eu_extra_version}00" ;;
527 *) AC_MSG_ERROR([confused by version number '$PACKAGE_VERSION']) ;;
535 case "$eu_version" in
536 0[[0-9]][[0-9]][[0-9]]) eu_version="${eu_version#0}$eu_extra_version" ;;
537 [[0-9]][[0-9]][[0-9]][[0-9]]) eu_version="${eu_version}$eu_extra_version" ;;
538 [[0-9]][[0-9]][[0-9]]) eu_version="${eu_version}0$eu_extra_version" ;;
539 [[0-9]][[0-9]]) eu_version="${eu_version}00$eu_extra_version";;
540 *) AC_MSG_ERROR([confused by version number '$PACKAGE_VERSION']) ;;
543 # Round up to the next release API (x.y) version.
544 eu_version=$(( (eu_version + 999) / 1000 ))
546 dnl Unique ID for this build.
547 MODVERSION="Build for ${LIBEBL_SUBDIR} ${eu_version} ${ac_cv_build}"
548 AC_SUBST([MODVERSION])
549 AC_DEFINE_UNQUOTED(MODVERSION, "$MODVERSION")
550 AH_TEMPLATE([MODVERSION], [Identifier for modules in the build.])
552 AC_CHECK_SIZEOF(long)
554 # On aarch64 before glibc 2.20 we would get the kernel user_pt_regs instead
555 # of the user_regs_struct from sys/user.h. They are structurally the same
556 # but we get either one or the other.
557 AC_CHECK_TYPE([struct user_regs_struct],
558 [sys_user_has_user_regs=yes], [sys_user_has_user_regs=no],
559 [[#include <sys/ptrace.h>]
560 [#include <sys/time.h>]
561 [#include <sys/user.h>]])
562 if test "$sys_user_has_user_regs" = "yes"; then
563 AC_DEFINE(HAVE_SYS_USER_REGS, 1,
564 [Define to 1 if <sys/user.h> defines struct user_regs_struct])
567 # On a 64-bit host where can can use $CC -m32, we'll run two sets of tests.
568 # Likewise in a 32-bit build on a host where $CC -m64 works.
570 # `$utrace_biarch' will be `-m64' even on an uniarch i386 machine.
571 CC_BIARCH="$CC $utrace_biarch"
572 AC_SUBST([CC_BIARCH])
574 # In maintainer mode we really need flex and bison.
575 # Otherwise we really need a release dir with maintainer files generated.
576 if test "x$enable_maintainer_mode" = xyes; then
577 AC_CHECK_PROG(HAVE_FLEX, flex, yes, no)
578 if test "$HAVE_FLEX" = "no"; then
579 AC_MSG_ERROR([flex needed in maintainer mode])
581 AC_CHECK_PROG(HAVE_BISON, bison, yes, no)
582 if test "$HAVE_BISON" = "no"; then
583 AC_MSG_ERROR([bison needed in maintainer mode])
586 if test ! -f ${srcdir}/libdw/known-dwarf.h; then
587 AC_MSG_ERROR([No libdw/known-dwarf.h. configure --enable-maintainer-mode])
591 # The testfiles are all compressed, we need bunzip2 when running make check
592 AC_CHECK_PROG(HAVE_BUNZIP2, bunzip2, yes, no)
593 if test "$HAVE_BUNZIP2" = "no"; then
594 AC_MSG_WARN([No bunzip2, needed to run make check])
600 =====================================================================
601 elfutils: ${PACKAGE_VERSION} (eu_version: ${eu_version})
602 =====================================================================
605 Program prefix ("eu-" recommended) : ${program_prefix}
606 Source code location : ${srcdir}
607 Maintainer mode : ${enable_maintainer_mode}
608 libebl modules subdirectory : ${LIBEBL_SUBDIR}
609 build arch : ${ac_cv_build}
611 RECOMMENDED FEATURES (should all be yes)
612 gzip support : ${with_zlib}
613 bzip2 support : ${with_bzlib}
614 lzma/xz support : ${with_lzma}
615 libstdc++ demangle support : ${enable_demangler}
616 File textrel check : ${enable_textrelcheck}
617 Symbol versioning : ${enable_symbol_versioning}
619 NOT RECOMMENDED FEATURES (should all be no)
620 Experimental thread safety : ${use_locks}
623 Deterministic archives by default : ${default_ar_deterministic}
624 Native language support : ${USE_NLS}
626 EXTRA TEST FEATURES (used with make check)
627 have bunzip2 installed (required) : ${HAVE_BUNZIP2}
628 debug branch prediction : ${use_debugpred}
629 gprof support : ${use_gprof}
630 gcov support : ${use_gcov}
631 run all tests under valgrind : ${use_valgrind}
632 gcc undefined behaviour sanitizer : ${use_undefined}
633 use rpath in tests : ${tests_use_rpath}
634 test biarch : ${utrace_cv_cc_biarch}