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 the linker to be build as a native-only linker. By default it
148 dnl can handle all architectures but this comes at a cost. A native
149 dnl will be slightly faster, small, and has fewer dependencies.
151 AC_ARG_ENABLE([generic],
152 AS_HELP_STRING([--disable-generic], [do not build generic linker]), [dnl
153 if test "$enable_generic" = no; then
156 AC_DEFINE(NATIVE_ELF, 32)
161 AC_MSG_ERROR([no machine-specific linker for this configuration available])
165 AH_TEMPLATE([NATIVE_ELF],
166 [Define to 32 or 64 if a specific implementation is wanted.])
167 AM_CONDITIONAL(NATIVE_LD, test "$native_ld" = yes)
168 dnl The automake generated Makefile cannot deal with macros in the name
169 dnl of files if at any time there is no such file, even if the filename
170 dnl would not be used.
171 AS_IF([test -z "$base_cpu"], [base_cpu=none])
173 dnl Support to work around automake's inflexible dependency generation.
174 dnl See src/Makefile.am for more information.
175 AM_CONDITIONAL(NEVER, false)
177 dnl enable debugging of branch prediction.
178 AC_ARG_ENABLE([debugpred],
179 AS_HELP_STRING([--enable-debugpred],[build binaries with support to debug branch prediction]),
180 [use_debugpred=$enableval], [use_debugpred=no])
181 case $use_debugpred in
182 yes) use_debugpred_val=1 ;;
183 *) use_debugpred_val=0 ;;
185 AC_SUBST([DEBUGPRED], $use_debugpred_val)
187 dnl Enable gprof suport.
188 AC_ARG_ENABLE([gprof],
189 AS_HELP_STRING([--enable-gprof],[build binaries with gprof support]), [use_gprof=$enableval], [use_gprof=no])
190 if test "$use_gprof" = yes; then
192 LDFLAGS="$LDFLAGS -pg"
194 AM_CONDITIONAL(GPROF, test "$use_gprof" = yes)
196 # Enable gcov suport.
197 AC_ARG_ENABLE([gcov],
198 AS_HELP_STRING([--enable-gcov],[build binaries with gcov support]), [use_gcov=$enableval], [use_gcov=no])
199 if test "$use_gcov" = yes; then
200 CFLAGS="$CFLAGS -fprofile-arcs -ftest-coverage"
201 LDFLAGS="$LDFLAGS -fprofile-arcs"
203 AM_CONDITIONAL(GCOV, test "$use_gcov" = yes)
205 AC_ARG_ENABLE([sanitize-undefined],
206 AS_HELP_STRING([--enable-sanitize-undefined],
207 [Use gcc undefined behaviour sanitizer]),
208 [use_undefined=$enableval], [use_undefined=no])
209 if test "$use_undefined" = yes; then
211 old_CXXFLAGS="$CXXFLAGS"
212 # We explicitly use unaligned access when possible (see ALLOW_UNALIGNED)
213 # We want to fail immediately on first error, don't try to recover.
214 CFLAGS="$CFLAGS -fsanitize=undefined -fno-sanitize-recover"
215 CXXFLAGS="$CXXFLAGS -fsanitize=undefined -fno-sanitize-recover"
216 AC_LINK_IFELSE([AC_LANG_SOURCE([int main (int argc, char **argv) { return 0; }])], use_undefined=yes, use_undefined=no)
217 AS_IF([test "x$use_undefined" != xyes],
218 AC_MSG_WARN([gcc undefined behaviour sanitizer not available])
219 CFLAGS="$old_CFLAGS" CXXFLAGS="$old_CXXFLAGS")
221 case $use_undefined in
222 yes) check_undefined_val=1 ;;
223 *) check_undefined_val=0 ;;
225 AC_DEFINE_UNQUOTED(CHECK_UNDEFINED, $check_undefined_val,
226 [Building with -fsanitize=undefined or not])
228 AC_ARG_ENABLE([valgrind],
229 AS_HELP_STRING([--enable-valgrind],[run all tests under valgrind]),
230 [use_valgrind=$enableval], [use_valgrind=no])
231 if test "$use_valgrind" = yes; then
232 AC_CHECK_PROG(HAVE_VALGRIND, valgrind, yes, no)
233 if test "$HAVE_VALGRIND" = "no"; then
234 AC_MSG_ERROR([valgrind not found])
237 AM_CONDITIONAL(USE_VALGRIND, test "$use_valgrind" = yes)
239 AM_CONDITIONAL(BUILD_STATIC, [dnl
240 test "$use_gprof" = yes -o "$use_gcov" = yes])
242 AC_ARG_ENABLE([tests-rpath],
243 AS_HELP_STRING([--enable-tests-rpath],[build $ORIGIN-using rpath into tests]),
244 [tests_use_rpath=$enableval], [tests_use_rpath=no])
245 AM_CONDITIONAL(TESTS_RPATH, test "$tests_use_rpath" = yes)
247 LIBEBL_SUBDIR="$PACKAGE"
248 AC_ARG_ENABLE([libebl-subdir],
249 AS_HELP_STRING([--enable-libebl-subdir=DIR],
250 [install libebl_CPU modules in $(libdir)/DIR]), [dnl
251 LIBEBL_SUBDIR="$enable_libebl_subdir"])
252 AC_SUBST([LIBEBL_SUBDIR])
253 AC_DEFINE_UNQUOTED(LIBEBL_SUBDIR, "$LIBEBL_SUBDIR")
254 AH_TEMPLATE([LIBEBL_SUBDIR], [$libdir subdirectory containing libebl modules.])
256 dnl zlib is mandatory.
259 eu_ZIPLIB(zlib,ZLIB,z,gzdirect,gzip)
260 AS_IF([test "x$with_zlib" = xno], [AC_MSG_ERROR([zlib not found but is required])])
263 dnl Test for bzlib and xz/lzma, gives BZLIB/LZMALIB .am
264 dnl conditional and config.h USE_BZLIB/USE_LZMALIB #define.
267 eu_ZIPLIB(bzlib,BZLIB,bz2,BZ2_bzdopen,bzip2)
268 # We need this since bzip2 doesn't have a pkgconfig file.
271 eu_ZIPLIB(lzma,LZMA,lzma,lzma_auto_decoder,[LZMA (xz)])
272 AS_IF([test "x$with_lzma" = xyes], [LIBLZMA="liblzma"], [LIBLZMA=""])
278 AC_CHECK_LIB([stdc++], [__cxa_demangle], [dnl
279 AC_DEFINE([USE_DEMANGLE], [1], [Defined if demangling is enabled])])
280 AM_CONDITIONAL(DEMANGLE, test "x$ac_cv_lib_stdcpp___cxa_demangle" = "xyes")
281 AS_IF([test "x$ac_cv_lib_stdcpp___cxa_demangle" = "xyes"],
282 [enable_demangler=yes],[enable_demangler=no])
284 AC_ARG_ENABLE([textrelcheck],
285 AS_HELP_STRING([--disable-textrelcheck],
286 [Disable textrelcheck being a fatal error]))
287 AM_CONDITIONAL(FATAL_TEXTREL, [test "x$enable_textrelcheck" != "xno"])
288 AS_IF([test "x$enable_textrelcheck" != "xno"],
289 [enable_textrelcheck=yes],[enable_textrelcheck=no])
291 AC_ARG_ENABLE([symbol-versioning],
292 AS_HELP_STRING([--disable-symbol-versioning],
293 [Disable symbol versioning in shared objects]))
294 AM_CONDITIONAL(SYMBOL_VERSIONING, [test "x$enable_symbol_versioning" != "xno"])
295 AS_IF([test "x$enable_symbol_versioning" = "xno"],
296 [AC_MSG_WARN([Disabling symbol versioning breaks ABI compatibility.])
297 enable_symbol_versioning=no],[enable_symbol_versioning=yes])
299 AC_CACHE_CHECK([whether gcc accepts -Wstack-usage], ac_cv_stack_usage, [dnl
301 CFLAGS="$CFLAGS -Wstack-usage=262144 -Werror"
302 AC_COMPILE_IFELSE([AC_LANG_SOURCE([])],
303 ac_cv_stack_usage=yes, ac_cv_stack_usage=no)
304 CFLAGS="$old_CFLAGS"])
305 AM_CONDITIONAL(ADD_STACK_USAGE_WARNING, [test "x$ac_cv_stack_usage" != "xno"])
307 # -Wlogical-op was too fragile in the past, make sure we get a sane one.
308 AC_CACHE_CHECK([whether gcc has a sane -Wlogical-op], ac_cv_logical_op, [dnl
310 CFLAGS="$CFLAGS -Wlogical-op -Werror"
311 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
313 int f (int r, int f) { return (r && (FLAG || (FLAG & f))); }])],
314 ac_cv_logical_op=yes, ac_cv_logical_op=no)
315 CFLAGS="$old_CFLAGS"])
316 AM_CONDITIONAL(SANE_LOGICAL_OP_WARNING,
317 [test "x$ac_cv_logical_op" != "xno"])
319 # -Wduplicated-cond was added by GCC6
320 AC_CACHE_CHECK([whether gcc accepts -Wduplicated-cond], ac_cv_duplicated_cond, [dnl
322 CFLAGS="$CFLAGS -Wduplicated-cond -Werror"
323 AC_COMPILE_IFELSE([AC_LANG_SOURCE([])],
324 ac_cv_duplicated_cond=yes, ac_cv_duplicated_cond=no)
325 CFLAGS="$old_CFLAGS"])
326 AM_CONDITIONAL(HAVE_DUPLICATED_COND_WARNING,
327 [test "x$ac_cv_duplicated_cond" != "xno"])
329 # -Wnull-dereference was added by GCC6
330 AC_CACHE_CHECK([whether gcc accepts -Wnull-dereference], ac_cv_null_dereference, [dnl
332 CFLAGS="$CFLAGS -Wnull-dereference -Werror"
333 AC_COMPILE_IFELSE([AC_LANG_SOURCE([])],
334 ac_cv_null_dereference=yes, ac_cv_null_dereference=no)
335 CFLAGS="$old_CFLAGS"])
336 AM_CONDITIONAL(HAVE_NULL_DEREFERENCE_WARNING,
337 [test "x$ac_cv_null_dereference" != "xno"])
339 dnl Check if we have argp available from our libc
343 [int argc=1; char *argv[]={"test"}; argp_parse(0,argc,&argv,0,0,0); return 0;]
345 [libc_has_argp="true"],
346 [libc_has_argp="false"]
349 dnl If our libc doesn't provide argp, then test for libargp
350 if test "$libc_has_argp" = "false" ; then
351 AC_MSG_WARN("libc does not have argp")
352 AC_CHECK_LIB([argp], [argp_parse], [have_argp="true"], [have_argp="false"])
354 if test "$have_argp" = "false"; then
355 AC_MSG_ERROR("no libargp found")
362 AC_SUBST([argp_LDADD])
364 dnl Check if we have <linux/bpf.h> for EM_BPF disassembly.
365 AC_CHECK_HEADERS(linux/bpf.h)
366 AM_CONDITIONAL(HAVE_LINUX_BPF_H, [test "x$ac_cv_header_linux_bpf_h" = "xyes"])
368 dnl The directories with content.
371 dnl Commented out for now.
372 dnl AC_CONFIG_FILES([doc/Makefile])
375 AC_CONFIG_FILES([lib/Makefile])
378 AC_CONFIG_FILES([libelf/Makefile])
380 dnl Higher-level ELF support library.
381 AC_CONFIG_FILES([libebl/Makefile])
383 dnl DWARF-ELF Lower-level Functions support library.
384 AC_CONFIG_FILES([libdwelf/Makefile])
387 AC_CONFIG_FILES([libdw/Makefile])
389 dnl Higher-level DWARF support library.
390 AC_CONFIG_FILES([libdwfl/Makefile])
392 dnl CPU handling library.
393 AC_CONFIG_FILES([libcpu/Makefile])
395 dnl Assembler library.
396 AM_CONDITIONAL(HAVE_LIBASM, true)dnl Used in tests/Makefile.am, which see.
397 AC_CONFIG_FILES([libasm/Makefile])
399 dnl CPU-specific backend libraries.
400 AC_CONFIG_FILES([backends/Makefile])
403 AC_CONFIG_FILES([src/Makefile po/Makefile.in])
406 AM_CONDITIONAL(STANDALONE, false)dnl Used in tests/Makefile.am, which see.
407 AC_CONFIG_FILES([tests/Makefile])
410 AC_CONFIG_FILES([config/libelf.pc config/libdw.pc])
412 # Get the definitions necessary to create the Makefiles in the po
413 # subdirectories. This is a small subset of the gettext rules.
414 AC_SUBST(USE_NLS, yes)
417 dnl Appended to the config.h file.
418 dnl We hide all kinds of configuration magic in lib/eu-config.h.
419 AH_BOTTOM([#include <eu-config.h>])
421 dnl Version compatibility header.
422 AC_CONFIG_FILES([version.h:config/version.h.in])
423 AC_SUBST([eu_version])
425 # 1.234<whatever> -> 1234<whatever>
426 case "$PACKAGE_VERSION" in
427 [[0-9]].*) eu_version=`echo "$PACKAGE_VERSION" | sed 's@\.@@'` ;;
428 *) AC_MSG_ERROR([confused by version number '$PACKAGE_VERSION']) ;;
430 case "$eu_version" in
432 # 1234.567 -> "1234", "567"
433 eu_extra_version="${eu_version#*.}"
434 eu_version="${eu_version%%.*}"
435 case "$eu_extra_version" in
436 [[0-9]][[0-9]][[0-9]]) ;;
437 [[0-9]][[0-9]]) eu_extra_version="${eu_extra_version}0" ;;
438 [[0-9]]) eu_extra_version="${eu_extra_version}00" ;;
439 *) AC_MSG_ERROR([confused by version number '$PACKAGE_VERSION']) ;;
447 case "$eu_version" in
448 0[[0-9]][[0-9]][[0-9]]) eu_version="${eu_version#0}$eu_extra_version" ;;
449 [[0-9]][[0-9]][[0-9]][[0-9]]) eu_version="${eu_version}$eu_extra_version" ;;
450 [[0-9]][[0-9]][[0-9]]) eu_version="${eu_version}0$eu_extra_version" ;;
451 [[0-9]][[0-9]]) eu_version="${eu_version}00$eu_extra_version";;
452 *) AC_MSG_ERROR([confused by version number '$PACKAGE_VERSION']) ;;
455 # Round up to the next release API (x.y) version.
456 eu_version=$(( (eu_version + 999) / 1000 ))
458 dnl Unique ID for this build.
459 MODVERSION="Build for ${LIBEBL_SUBDIR} ${eu_version} ${ac_cv_build}"
460 AC_SUBST([MODVERSION])
461 AC_DEFINE_UNQUOTED(MODVERSION, "$MODVERSION")
462 AH_TEMPLATE([MODVERSION], [Identifier for modules in the build.])
464 AC_CHECK_SIZEOF(long)
466 # On aarch64 before glibc 2.20 we would get the kernel user_pt_regs instead
467 # of the user_regs_struct from sys/user.h. They are structurally the same
468 # but we get either one or the other.
469 AC_CHECK_TYPE([struct user_regs_struct],
470 [sys_user_has_user_regs=yes], [sys_user_has_user_regs=no],
471 [[#include <sys/ptrace.h>]
472 [#include <sys/time.h>]
473 [#include <sys/user.h>]])
474 if test "$sys_user_has_user_regs" = "yes"; then
475 AC_DEFINE(HAVE_SYS_USER_REGS, 1,
476 [Define to 1 if <sys/user.h> defines struct user_regs_struct])
479 # On a 64-bit host where can can use $CC -m32, we'll run two sets of tests.
480 # Likewise in a 32-bit build on a host where $CC -m64 works.
482 # `$utrace_biarch' will be `-m64' even on an uniarch i386 machine.
483 CC_BIARCH="$CC $utrace_biarch"
484 AC_SUBST([CC_BIARCH])
486 # In maintainer mode we really need flex and bison.
487 # Otherwise we really need a release dir with maintainer files generated.
488 if test "x$enable_maintainer_mode" = xyes; then
489 AC_CHECK_PROG(HAVE_FLEX, flex, yes, no)
490 if test "$HAVE_FLEX" = "no"; then
491 AC_MSG_ERROR([flex needed in maintainer mode])
493 AC_CHECK_PROG(HAVE_BISON, bison, yes, no)
494 if test "$HAVE_BISON" = "no"; then
495 AC_MSG_ERROR([bison needed in maintainer mode])
498 if test ! -f ${srcdir}/libdw/known-dwarf.h; then
499 AC_MSG_ERROR([No libdw/known-dwarf.h. configure --enable-maintainer-mode])
503 # The testfiles are all compressed, we need bunzip2 when running make check
504 AC_CHECK_PROG(HAVE_BUNZIP2, bunzip2, yes, no)
505 if test "$HAVE_BUNZIP2" = "no"; then
506 AC_MSG_WARN([No bunzip2, needed to run make check])
512 =====================================================================
513 elfutils: ${PACKAGE_VERSION} (eu_version: ${eu_version})
514 =====================================================================
517 Program prefix ("eu-" recommended) : ${program_prefix}
518 Source code location : ${srcdir}
519 Maintainer mode : ${enable_maintainer_mode}
520 libebl modules subdirectory : ${LIBEBL_SUBDIR}
521 build arch : ${ac_cv_build}
523 RECOMMENDED FEATURES (should all be yes)
524 gzip support : ${with_zlib}
525 bzip2 support : ${with_bzlib}
526 lzma/xz support : ${with_lzma}
527 libstdc++ demangle support : ${enable_demangler}
528 File textrel check : ${enable_textrelcheck}
529 Symbol versioning : ${enable_symbol_versioning}
531 NOT RECOMMENDED FEATURES (should all be no)
532 Experimental thread safety : ${use_locks}
535 Deterministic archives by default : ${default_ar_deterministic}
536 Native language support : ${USE_NLS}
538 EXTRA TEST FEATURES (used with make check)
539 have bunzip2 installed (required) : ${HAVE_BUNZIP2}
540 debug branch prediction : ${use_debugpred}
541 gprof support : ${use_gprof}
542 gcov support : ${use_gcov}
543 run all tests under valgrind : ${use_valgrind}
544 gcc undefined behaviour sanitizer : ${use_undefined}
545 use rpath in tests : ${tests_use_rpath}
546 test biarch : ${utrace_cv_cc_biarch}