1 dnl Process this file with autoconf to produce a configure script.
2 dnl Configure input file for elfutils. -*-autoconf-*-
4 dnl Copyright (C) 1996-2016 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],[0.166],[https://bugzilla.redhat.com/],[elfutils])
22 # We want eu- as default program prefix if none was given by the user.
23 # But if the user explicitly provided --program-prefix="" then pretend
24 # it wasn't set at all (NONE). We want to test this really early before
25 # configure has a chance to use the value.
27 if test "x$program_prefix" = "xNONE"; then
28 AC_MSG_NOTICE([No --program-prefix given, using "eu-"])
30 elif test "x$program_prefix" = "x"; then
31 AC_MSG_NOTICE([Using no program-prefix])
35 AC_CONFIG_AUX_DIR([config])
36 AC_CONFIG_FILES([config/Makefile])
38 AC_COPYRIGHT([Copyright (C) 1996-2016 Red Hat, Inc.])
39 AC_PREREQ(2.63) dnl Minimum Autoconf version required.
41 dnl We use GNU make extensions; automake 1.10 defaults to -Wportability.
42 AM_INIT_AUTOMAKE([gnits 1.11 -Wno-portability dist-bzip2 no-dist-gzip parallel-tests])
45 AM_SILENT_RULES([yes])
47 AC_CONFIG_SRCDIR([libelf/libelf.h])
48 AC_CONFIG_FILES([Makefile])
49 AC_CONFIG_HEADERS([config.h])
51 AC_CONFIG_MACRO_DIR([m4])
52 AC_CONFIG_FILES([m4/Makefile])
54 dnl The RPM spec file. We substitute a few values in the file.
55 AC_CONFIG_FILES([elfutils.spec:config/elfutils.spec.in])
60 AC_ARG_ENABLE(deterministic-archives,
61 [AS_HELP_STRING([--enable-deterministic-archives],
62 [ar and ranlib default to -D behavior])], [
63 if test "${enableval}" = no; then
64 default_ar_deterministic=false
66 default_ar_deterministic=true
67 fi], [default_ar_deterministic=false])
68 AC_DEFINE_UNQUOTED(DEFAULT_AR_DETERMINISTIC, $default_ar_deterministic,
69 [Should ar and ranlib use -D behavior by default?])
71 AC_ARG_ENABLE([thread-safety],
72 AS_HELP_STRING([--enable-thread-safety],
73 [enable thread safety of libraries EXPERIMENTAL]),
74 use_locks=$enableval, use_locks=no)
75 AM_CONDITIONAL(USE_LOCKS, test "$use_locks" = yes)
76 AS_IF([test "$use_locks" = yes], [AC_DEFINE(USE_LOCKS)])
77 AS_IF([test "$use_locks" = yes],
78 [AC_MSG_WARN([thread-safety is EXPERIMENTAL tests might fail.])])
80 AH_TEMPLATE([USE_LOCKS], [Defined if libraries should be thread-safe.])
86 # Only available since automake 1.12
87 m4_ifdef([AM_PROG_AR], [AM_PROG_AR])
88 AC_CHECK_TOOL([READELF], [readelf])
89 AC_CHECK_TOOL([NM], [nm])
91 # We use -std=gnu99 but have explicit checks for some language constructs
92 # and GNU extensions since some compilers claim GNU99 support, but don't
93 # really support all language extensions. In particular we need
94 # Mixed Declarations and Code
95 # https://gcc.gnu.org/onlinedocs/gcc/Mixed-Declarations.html
97 # https://gcc.gnu.org/onlinedocs/gcc/Nested-Functions.html
98 # Arrays of Variable Length
99 # https://gcc.gnu.org/onlinedocs/gcc/Variable-Length.html
100 AC_CACHE_CHECK([for gcc with GNU99 support], ac_cv_c99, [dnl
102 CFLAGS="$CFLAGS -std=gnu99"
103 AC_COMPILE_IFELSE([AC_LANG_SOURCE([dnl
106 for (int i = 0; i < a; ++i) if (i % 4) break; int s = a; return s;
109 double bar (double a, double b)
111 double square (double z) { return z * z; }
112 return square (a) + square (b);
117 struct S { int x[[n]]; };
119 ac_cv_c99=yes, ac_cv_c99=no)
120 CFLAGS="$old_CFLAGS"])
121 AS_IF([test "x$ac_cv_c99" != xyes],
122 AC_MSG_ERROR([gcc with GNU99 support required]))
124 AC_CACHE_CHECK([for __thread support], ac_cv_tls, [dnl
125 # Use the same flags that we use for our DSOs, so the test is representative.
126 # Some old compiler/linker/libc combinations fail some ways and not others.
127 save_CFLAGS="$CFLAGS"
128 save_LDFLAGS="$LDFLAGS"
129 CFLAGS="-fPIC $CFLAGS"
130 LDFLAGS="-shared -Wl,-z,defs,-z,relro $LDFLAGS"
132 AC_LANG_PROGRAM([[#include <stdlib.h>
134 static __thread int a; int foo (int b) { return a + b; }]],
135 [[exit (foo (0));]])],
136 ac_cv_tls=yes, ac_cv_tls=no)
137 CFLAGS="$save_CFLAGS"
138 LDFLAGS="$save_LDFLAGS"])
139 AS_IF([test "x$ac_cv_tls" != xyes],
140 AC_MSG_ERROR([__thread support required]))
142 dnl This test must come as early as possible after the compiler configuration
143 dnl tests, because the choice of the file model can (in principle) affect
144 dnl whether functions and headers are available, whether they work, etc.
147 dnl enable debugging of branch prediction.
148 AC_ARG_ENABLE([debugpred],
149 AS_HELP_STRING([--enable-debugpred],[build binaries with support to debug branch prediction]),
150 [use_debugpred=$enableval], [use_debugpred=no])
151 case $use_debugpred in
152 yes) use_debugpred_val=1 ;;
153 *) use_debugpred_val=0 ;;
155 AC_SUBST([DEBUGPRED], $use_debugpred_val)
157 dnl Enable gprof suport.
158 AC_ARG_ENABLE([gprof],
159 AS_HELP_STRING([--enable-gprof],[build binaries with gprof support]), [use_gprof=$enableval], [use_gprof=no])
160 if test "$use_gprof" = yes; then
162 LDFLAGS="$LDFLAGS -pg"
164 AM_CONDITIONAL(GPROF, test "$use_gprof" = yes)
166 # Enable gcov suport.
167 AC_ARG_ENABLE([gcov],
168 AS_HELP_STRING([--enable-gcov],[build binaries with gcov support]), [use_gcov=$enableval], [use_gcov=no])
169 if test "$use_gcov" = yes; then
170 CFLAGS="$CFLAGS -fprofile-arcs -ftest-coverage"
171 LDFLAGS="$LDFLAGS -fprofile-arcs"
173 AM_CONDITIONAL(GCOV, test "$use_gcov" = yes)
175 AC_ARG_ENABLE([sanitize-undefined],
176 AS_HELP_STRING([--enable-sanitize-undefined],
177 [Use gcc undefined behaviour sanitizer]),
178 [use_undefined=$enableval], [use_undefined=no])
179 if test "$use_undefined" = yes; then
181 old_CXXFLAGS="$CXXFLAGS"
182 # We explicitly use unaligned access when possible (see ALLOW_UNALIGNED)
183 # We want to fail immediately on first error, don't try to recover.
184 CFLAGS="$CFLAGS -fsanitize=undefined -fno-sanitize-recover"
185 CXXFLAGS="$CXXFLAGS -fsanitize=undefined -fno-sanitize-recover"
186 AC_LINK_IFELSE([AC_LANG_SOURCE([int main (int argc, char **argv) { return 0; }])], use_undefined=yes, use_undefined=no)
187 AS_IF([test "x$use_undefined" != xyes],
188 AC_MSG_WARN([gcc undefined behaviour sanitizer not available])
189 CFLAGS="$old_CFLAGS" CXXFLAGS="$old_CXXFLAGS")
191 case $use_undefined in
192 yes) check_undefined_val=1 ;;
193 *) check_undefined_val=0 ;;
195 AC_DEFINE_UNQUOTED(CHECK_UNDEFINED, $check_undefined_val,
196 [Building with -fsanitize=undefined or not])
198 AC_ARG_ENABLE([valgrind],
199 AS_HELP_STRING([--enable-valgrind],[run all tests under valgrind]),
200 [use_valgrind=$enableval], [use_valgrind=no])
201 if test "$use_valgrind" = yes; then
202 AC_CHECK_PROG(HAVE_VALGRIND, valgrind, yes, no)
203 if test "$HAVE_VALGRIND" = "no"; then
204 AC_MSG_ERROR([valgrind not found])
207 AM_CONDITIONAL(USE_VALGRIND, test "$use_valgrind" = yes)
209 AM_CONDITIONAL(BUILD_STATIC, [dnl
210 test "$use_gprof" = yes -o "$use_gcov" = yes])
212 AC_ARG_ENABLE([tests-rpath],
213 AS_HELP_STRING([--enable-tests-rpath],[build $ORIGIN-using rpath into tests]),
214 [tests_use_rpath=$enableval], [tests_use_rpath=no])
215 AM_CONDITIONAL(TESTS_RPATH, test "$tests_use_rpath" = yes)
217 LIBEBL_SUBDIR="$PACKAGE"
218 AC_ARG_ENABLE([libebl-subdir],
219 AS_HELP_STRING([--enable-libebl-subdir=DIR],
220 [install libebl_CPU modules in $(libdir)/DIR]), [dnl
221 LIBEBL_SUBDIR="$enable_libebl_subdir"])
222 AC_SUBST([LIBEBL_SUBDIR])
223 AC_DEFINE_UNQUOTED(LIBEBL_SUBDIR, "$LIBEBL_SUBDIR")
224 AH_TEMPLATE([LIBEBL_SUBDIR], [$libdir subdirectory containing libebl modules.])
226 dnl zlib is mandatory.
229 eu_ZIPLIB(zlib,ZLIB,z,gzdirect,gzip)
230 AS_IF([test "x$with_zlib" = xno], [AC_MSG_ERROR([zlib not found but is required])])
233 dnl Test for bzlib and xz/lzma, gives BZLIB/LZMALIB .am
234 dnl conditional and config.h USE_BZLIB/USE_LZMALIB #define.
237 eu_ZIPLIB(bzlib,BZLIB,bz2,BZ2_bzdopen,bzip2)
238 # We need this since bzip2 doesn't have a pkgconfig file.
241 eu_ZIPLIB(lzma,LZMA,lzma,lzma_auto_decoder,[LZMA (xz)])
242 AS_IF([test "x$with_lzma" = xyes], [LIBLZMA="liblzma"], [LIBLZMA=""])
248 AC_CHECK_LIB([stdc++], [__cxa_demangle], [dnl
249 AC_DEFINE([USE_DEMANGLE], [1], [Defined if demangling is enabled])])
250 AM_CONDITIONAL(DEMANGLE, test "x$ac_cv_lib_stdcpp___cxa_demangle" = "xyes")
251 AS_IF([test "x$ac_cv_lib_stdcpp___cxa_demangle" = "xyes"],
252 [enable_demangler=yes],[enable_demangler=no])
254 AC_ARG_ENABLE([textrelcheck],
255 AS_HELP_STRING([--disable-textrelcheck],
256 [Disable textrelcheck being a fatal error]))
257 AM_CONDITIONAL(FATAL_TEXTREL, [test "x$enable_textrelcheck" != "xno"])
258 AS_IF([test "x$enable_textrelcheck" != "xno"],
259 [enable_textrelcheck=yes],[enable_textrelcheck=no])
261 AC_ARG_ENABLE([symbol-versioning],
262 AS_HELP_STRING([--disable-symbol-versioning],
263 [Disable symbol versioning in shared objects]))
264 AM_CONDITIONAL(SYMBOL_VERSIONING, [test "x$enable_symbol_versioning" != "xno"])
265 AS_IF([test "x$enable_symbol_versioning" = "xno"],
266 [AC_MSG_WARN([Disabling symbol versioning breaks ABI compatibility.])
267 enable_symbol_versioning=no],[enable_symbol_versioning=yes])
269 AC_CACHE_CHECK([whether gcc accepts -Wstack-usage], ac_cv_stack_usage, [dnl
271 CFLAGS="$CFLAGS -Wstack-usage=262144 -Werror"
272 AC_COMPILE_IFELSE([AC_LANG_SOURCE([])],
273 ac_cv_stack_usage=yes, ac_cv_stack_usage=no)
274 CFLAGS="$old_CFLAGS"])
275 AM_CONDITIONAL(ADD_STACK_USAGE_WARNING, [test "x$ac_cv_stack_usage" != "xno"])
277 # -Wlogical-op was too fragile in the past, make sure we get a sane one.
278 AC_CACHE_CHECK([whether gcc has a sane -Wlogical-op], ac_cv_logical_op, [dnl
280 CFLAGS="$CFLAGS -Wlogical-op -Werror"
281 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
283 int f (int r, int f) { return (r && (FLAG || (FLAG & f))); }])],
284 ac_cv_logical_op=yes, ac_cv_logical_op=no)
285 CFLAGS="$old_CFLAGS"])
286 AM_CONDITIONAL(SANE_LOGICAL_OP_WARNING,
287 [test "x$ac_cv_logical_op" != "xno"])
289 # -Wduplicated-cond was added by GCC6
290 AC_CACHE_CHECK([whether gcc accepts -Wduplicated-cond], ac_cv_duplicated_cond, [dnl
292 CFLAGS="$CFLAGS -Wduplicated-cond -Werror"
293 AC_COMPILE_IFELSE([AC_LANG_SOURCE([])],
294 ac_cv_duplicated_cond=yes, ac_cv_duplicated_cond=no)
295 CFLAGS="$old_CFLAGS"])
296 AM_CONDITIONAL(HAVE_DUPLICATED_COND_WARNING,
297 [test "x$ac_cv_duplicated_cond" != "xno"])
299 # -Wnull-dereference was added by GCC6
300 AC_CACHE_CHECK([whether gcc accepts -Wnull-dereference], ac_cv_null_dereference, [dnl
302 CFLAGS="$CFLAGS -Wnull-dereference -Werror"
303 AC_COMPILE_IFELSE([AC_LANG_SOURCE([])],
304 ac_cv_null_dereference=yes, ac_cv_null_dereference=no)
305 CFLAGS="$old_CFLAGS"])
306 AM_CONDITIONAL(HAVE_NULL_DEREFERENCE_WARNING,
307 [test "x$ac_cv_null_dereference" != "xno"])
309 dnl Check if we have argp available from our libc
313 [int argc=1; char *argv[]={"test"}; argp_parse(0,argc,&argv,0,0,0); return 0;]
315 [libc_has_argp="true"],
316 [libc_has_argp="false"]
319 dnl If our libc doesn't provide argp, then test for libargp
320 if test "$libc_has_argp" = "false" ; then
321 AC_MSG_WARN("libc does not have argp")
322 AC_CHECK_LIB([argp], [argp_parse], [have_argp="true"], [have_argp="false"])
324 if test "$have_argp" = "false"; then
325 AC_MSG_ERROR("no libargp found")
332 AC_SUBST([argp_LDADD])
334 dnl Check if we have <linux/bpf.h> for EM_BPF disassembly.
335 AC_CHECK_HEADERS(linux/bpf.h)
336 AM_CONDITIONAL(HAVE_LINUX_BPF_H, [test "x$ac_cv_header_linux_bpf_h" = "xyes"])
338 dnl The directories with content.
341 dnl Commented out for now.
342 dnl AC_CONFIG_FILES([doc/Makefile])
345 AC_CONFIG_FILES([lib/Makefile])
348 AC_CONFIG_FILES([libelf/Makefile])
350 dnl Higher-level ELF support library.
351 AC_CONFIG_FILES([libebl/Makefile])
353 dnl DWARF-ELF Lower-level Functions support library.
354 AC_CONFIG_FILES([libdwelf/Makefile])
357 AC_CONFIG_FILES([libdw/Makefile])
359 dnl Higher-level DWARF support library.
360 AC_CONFIG_FILES([libdwfl/Makefile])
362 dnl CPU handling library.
363 AC_CONFIG_FILES([libcpu/Makefile])
365 dnl Assembler library.
366 AM_CONDITIONAL(HAVE_LIBASM, true)dnl Used in tests/Makefile.am, which see.
367 AC_CONFIG_FILES([libasm/Makefile])
369 dnl CPU-specific backend libraries.
370 AC_CONFIG_FILES([backends/Makefile])
373 AC_CONFIG_FILES([src/Makefile po/Makefile.in])
376 AM_CONDITIONAL(STANDALONE, false)dnl Used in tests/Makefile.am, which see.
377 AC_CONFIG_FILES([tests/Makefile])
380 AC_CONFIG_FILES([config/libelf.pc config/libdw.pc])
382 # Get the definitions necessary to create the Makefiles in the po
383 # subdirectories. This is a small subset of the gettext rules.
384 AC_SUBST(USE_NLS, yes)
387 dnl Appended to the config.h file.
388 dnl We hide all kinds of configuration magic in lib/eu-config.h.
389 AH_BOTTOM([#include <eu-config.h>])
391 dnl Version compatibility header.
392 AC_CONFIG_FILES([version.h:config/version.h.in])
393 AC_SUBST([eu_version])
395 # 1.234<whatever> -> 1234<whatever>
396 case "$PACKAGE_VERSION" in
397 [[0-9]].*) eu_version=`echo "$PACKAGE_VERSION" | sed 's@\.@@'` ;;
398 *) AC_MSG_ERROR([confused by version number '$PACKAGE_VERSION']) ;;
400 case "$eu_version" in
402 # 1234.567 -> "1234", "567"
403 eu_extra_version="${eu_version#*.}"
404 eu_version="${eu_version%%.*}"
405 case "$eu_extra_version" in
406 [[0-9]][[0-9]][[0-9]]) ;;
407 [[0-9]][[0-9]]) eu_extra_version="${eu_extra_version}0" ;;
408 [[0-9]]) eu_extra_version="${eu_extra_version}00" ;;
409 *) AC_MSG_ERROR([confused by version number '$PACKAGE_VERSION']) ;;
417 case "$eu_version" in
418 0[[0-9]][[0-9]][[0-9]]) eu_version="${eu_version#0}$eu_extra_version" ;;
419 [[0-9]][[0-9]][[0-9]][[0-9]]) eu_version="${eu_version}$eu_extra_version" ;;
420 [[0-9]][[0-9]][[0-9]]) eu_version="${eu_version}0$eu_extra_version" ;;
421 [[0-9]][[0-9]]) eu_version="${eu_version}00$eu_extra_version";;
422 *) AC_MSG_ERROR([confused by version number '$PACKAGE_VERSION']) ;;
425 # Round up to the next release API (x.y) version.
426 eu_version=$(( (eu_version + 999) / 1000 ))
428 dnl Unique ID for this build.
429 MODVERSION="Build for ${LIBEBL_SUBDIR} ${eu_version} ${ac_cv_build}"
430 AC_SUBST([MODVERSION])
431 AC_DEFINE_UNQUOTED(MODVERSION, "$MODVERSION")
432 AH_TEMPLATE([MODVERSION], [Identifier for modules in the build.])
434 AC_CHECK_SIZEOF(long)
436 # On aarch64 before glibc 2.20 we would get the kernel user_pt_regs instead
437 # of the user_regs_struct from sys/user.h. They are structurally the same
438 # but we get either one or the other.
439 AC_CHECK_TYPE([struct user_regs_struct],
440 [sys_user_has_user_regs=yes], [sys_user_has_user_regs=no],
441 [[#include <sys/ptrace.h>]
442 [#include <sys/time.h>]
443 [#include <sys/user.h>]])
444 if test "$sys_user_has_user_regs" = "yes"; then
445 AC_DEFINE(HAVE_SYS_USER_REGS, 1,
446 [Define to 1 if <sys/user.h> defines struct user_regs_struct])
449 # On a 64-bit host where can can use $CC -m32, we'll run two sets of tests.
450 # Likewise in a 32-bit build on a host where $CC -m64 works.
452 # `$utrace_biarch' will be `-m64' even on an uniarch i386 machine.
453 CC_BIARCH="$CC $utrace_biarch"
454 AC_SUBST([CC_BIARCH])
456 # In maintainer mode we really need flex and bison.
457 # Otherwise we really need a release dir with maintainer files generated.
458 if test "x$enable_maintainer_mode" = xyes; then
459 AC_CHECK_PROG(HAVE_FLEX, flex, yes, no)
460 if test "$HAVE_FLEX" = "no"; then
461 AC_MSG_ERROR([flex needed in maintainer mode])
463 AC_CHECK_PROG(HAVE_BISON, bison, yes, no)
464 if test "$HAVE_BISON" = "no"; then
465 AC_MSG_ERROR([bison needed in maintainer mode])
468 if test ! -f ${srcdir}/libdw/known-dwarf.h; then
469 AC_MSG_ERROR([No libdw/known-dwarf.h. configure --enable-maintainer-mode])
473 # The testfiles are all compressed, we need bunzip2 when running make check
474 AC_CHECK_PROG(HAVE_BUNZIP2, bunzip2, yes, no)
475 if test "$HAVE_BUNZIP2" = "no"; then
476 AC_MSG_WARN([No bunzip2, needed to run make check])
482 =====================================================================
483 elfutils: ${PACKAGE_VERSION} (eu_version: ${eu_version})
484 =====================================================================
487 Program prefix ("eu-" recommended) : ${program_prefix}
488 Source code location : ${srcdir}
489 Maintainer mode : ${enable_maintainer_mode}
490 libebl modules subdirectory : ${LIBEBL_SUBDIR}
491 build arch : ${ac_cv_build}
493 RECOMMENDED FEATURES (should all be yes)
494 gzip support : ${with_zlib}
495 bzip2 support : ${with_bzlib}
496 lzma/xz support : ${with_lzma}
497 libstdc++ demangle support : ${enable_demangler}
498 File textrel check : ${enable_textrelcheck}
499 Symbol versioning : ${enable_symbol_versioning}
501 NOT RECOMMENDED FEATURES (should all be no)
502 Experimental thread safety : ${use_locks}
505 Deterministic archives by default : ${default_ar_deterministic}
506 Native language support : ${USE_NLS}
508 EXTRA TEST FEATURES (used with make check)
509 have bunzip2 installed (required) : ${HAVE_BUNZIP2}
510 debug branch prediction : ${use_debugpred}
511 gprof support : ${use_gprof}
512 gcov support : ${use_gcov}
513 run all tests under valgrind : ${use_valgrind}
514 gcc undefined behaviour sanitizer : ${use_undefined}
515 use rpath in tests : ${tests_use_rpath}
516 test biarch : ${utrace_cv_cc_biarch}