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],[0.167],[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_DECLS([memrchr, rawmemchr],[],[],
250 #include <string.h>])
251 AC_CHECK_DECLS([powerof2],[],[],[#include <sys/param.h>])
253 AC_CHECK_LIB([stdc++], [__cxa_demangle], [dnl
254 AC_DEFINE([USE_DEMANGLE], [1], [Defined if demangling is enabled])])
255 AM_CONDITIONAL(DEMANGLE, test "x$ac_cv_lib_stdcpp___cxa_demangle" = "xyes")
256 AS_IF([test "x$ac_cv_lib_stdcpp___cxa_demangle" = "xyes"],
257 [enable_demangler=yes],[enable_demangler=no])
259 AC_ARG_ENABLE([textrelcheck],
260 AS_HELP_STRING([--disable-textrelcheck],
261 [Disable textrelcheck being a fatal error]))
262 AM_CONDITIONAL(FATAL_TEXTREL, [test "x$enable_textrelcheck" != "xno"])
263 AS_IF([test "x$enable_textrelcheck" != "xno"],
264 [enable_textrelcheck=yes],[enable_textrelcheck=no])
266 AC_ARG_ENABLE([symbol-versioning],
267 AS_HELP_STRING([--disable-symbol-versioning],
268 [Disable symbol versioning in shared objects]))
269 AM_CONDITIONAL(SYMBOL_VERSIONING, [test "x$enable_symbol_versioning" != "xno"])
270 AS_IF([test "x$enable_symbol_versioning" = "xno"],
271 [AC_MSG_WARN([Disabling symbol versioning breaks ABI compatibility.])
272 enable_symbol_versioning=no],[enable_symbol_versioning=yes])
274 AC_CACHE_CHECK([whether gcc accepts -Wstack-usage], ac_cv_stack_usage, [dnl
276 CFLAGS="$CFLAGS -Wstack-usage=262144 -Werror"
277 AC_COMPILE_IFELSE([AC_LANG_SOURCE([])],
278 ac_cv_stack_usage=yes, ac_cv_stack_usage=no)
279 CFLAGS="$old_CFLAGS"])
280 AM_CONDITIONAL(ADD_STACK_USAGE_WARNING, [test "x$ac_cv_stack_usage" != "xno"])
282 # -Wlogical-op was too fragile in the past, make sure we get a sane one.
283 AC_CACHE_CHECK([whether gcc has a sane -Wlogical-op], ac_cv_logical_op, [dnl
285 CFLAGS="$CFLAGS -Wlogical-op -Werror"
286 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
288 int f (int r, int f) { return (r && (FLAG || (FLAG & f))); }])],
289 ac_cv_logical_op=yes, ac_cv_logical_op=no)
290 CFLAGS="$old_CFLAGS"])
291 AM_CONDITIONAL(SANE_LOGICAL_OP_WARNING,
292 [test "x$ac_cv_logical_op" != "xno"])
294 # -Wduplicated-cond was added by GCC6
295 AC_CACHE_CHECK([whether gcc accepts -Wduplicated-cond], ac_cv_duplicated_cond, [dnl
297 CFLAGS="$CFLAGS -Wduplicated-cond -Werror"
298 AC_COMPILE_IFELSE([AC_LANG_SOURCE([])],
299 ac_cv_duplicated_cond=yes, ac_cv_duplicated_cond=no)
300 CFLAGS="$old_CFLAGS"])
301 AM_CONDITIONAL(HAVE_DUPLICATED_COND_WARNING,
302 [test "x$ac_cv_duplicated_cond" != "xno"])
304 # -Wnull-dereference was added by GCC6
305 AC_CACHE_CHECK([whether gcc accepts -Wnull-dereference], ac_cv_null_dereference, [dnl
307 CFLAGS="$CFLAGS -Wnull-dereference -Werror"
308 AC_COMPILE_IFELSE([AC_LANG_SOURCE([])],
309 ac_cv_null_dereference=yes, ac_cv_null_dereference=no)
310 CFLAGS="$old_CFLAGS"])
311 AM_CONDITIONAL(HAVE_NULL_DEREFERENCE_WARNING,
312 [test "x$ac_cv_null_dereference" != "xno"])
314 dnl Check if we have argp available from our libc
318 [int argc=1; char *argv[]={"test"}; argp_parse(0,argc,&argv,0,0,0); return 0;]
320 [libc_has_argp="true"],
321 [libc_has_argp="false"]
324 dnl If our libc doesn't provide argp, then test for libargp
325 if test "$libc_has_argp" = "false" ; then
326 AC_MSG_WARN("libc does not have argp")
327 AC_CHECK_LIB([argp], [argp_parse], [have_argp="true"], [have_argp="false"])
329 if test "$have_argp" = "false"; then
330 AC_MSG_ERROR("no libargp found")
337 AC_SUBST([argp_LDADD])
339 dnl Check if we have <linux/bpf.h> for EM_BPF disassembly.
340 AC_CHECK_HEADERS(linux/bpf.h)
341 AM_CONDITIONAL(HAVE_LINUX_BPF_H, [test "x$ac_cv_header_linux_bpf_h" = "xyes"])
343 dnl The directories with content.
346 dnl Commented out for now.
347 dnl AC_CONFIG_FILES([doc/Makefile])
350 AC_CONFIG_FILES([lib/Makefile])
353 AC_CONFIG_FILES([libelf/Makefile])
355 dnl Higher-level ELF support library.
356 AC_CONFIG_FILES([libebl/Makefile])
358 dnl DWARF-ELF Lower-level Functions support library.
359 AC_CONFIG_FILES([libdwelf/Makefile])
362 AC_CONFIG_FILES([libdw/Makefile])
364 dnl Higher-level DWARF support library.
365 AC_CONFIG_FILES([libdwfl/Makefile])
367 dnl CPU handling library.
368 AC_CONFIG_FILES([libcpu/Makefile])
370 dnl Assembler library.
371 AM_CONDITIONAL(HAVE_LIBASM, true)dnl Used in tests/Makefile.am, which see.
372 AC_CONFIG_FILES([libasm/Makefile])
374 dnl CPU-specific backend libraries.
375 AC_CONFIG_FILES([backends/Makefile])
378 AC_CONFIG_FILES([src/Makefile po/Makefile.in])
381 AM_CONDITIONAL(STANDALONE, false)dnl Used in tests/Makefile.am, which see.
382 AC_CONFIG_FILES([tests/Makefile])
385 AC_CONFIG_FILES([config/libelf.pc config/libdw.pc])
387 # Get the definitions necessary to create the Makefiles in the po
388 # subdirectories. This is a small subset of the gettext rules.
389 AC_SUBST(USE_NLS, yes)
392 dnl Appended to the config.h file.
393 dnl We hide all kinds of configuration magic in lib/eu-config.h.
394 AH_BOTTOM([#include <eu-config.h>])
396 dnl Version compatibility header.
397 AC_CONFIG_FILES([version.h:config/version.h.in])
398 AC_SUBST([eu_version])
400 # 1.234<whatever> -> 1234<whatever>
401 case "$PACKAGE_VERSION" in
402 [[0-9]].*) eu_version=`echo "$PACKAGE_VERSION" | sed 's@\.@@'` ;;
403 *) AC_MSG_ERROR([confused by version number '$PACKAGE_VERSION']) ;;
405 case "$eu_version" in
407 # 1234.567 -> "1234", "567"
408 eu_extra_version="${eu_version#*.}"
409 eu_version="${eu_version%%.*}"
410 case "$eu_extra_version" in
411 [[0-9]][[0-9]][[0-9]]) ;;
412 [[0-9]][[0-9]]) eu_extra_version="${eu_extra_version}0" ;;
413 [[0-9]]) eu_extra_version="${eu_extra_version}00" ;;
414 *) AC_MSG_ERROR([confused by version number '$PACKAGE_VERSION']) ;;
422 case "$eu_version" in
423 0[[0-9]][[0-9]][[0-9]]) eu_version="${eu_version#0}$eu_extra_version" ;;
424 [[0-9]][[0-9]][[0-9]][[0-9]]) eu_version="${eu_version}$eu_extra_version" ;;
425 [[0-9]][[0-9]][[0-9]]) eu_version="${eu_version}0$eu_extra_version" ;;
426 [[0-9]][[0-9]]) eu_version="${eu_version}00$eu_extra_version";;
427 *) AC_MSG_ERROR([confused by version number '$PACKAGE_VERSION']) ;;
430 # Round up to the next release API (x.y) version.
431 eu_version=$(( (eu_version + 999) / 1000 ))
433 dnl Unique ID for this build.
434 MODVERSION="Build for ${LIBEBL_SUBDIR} ${eu_version} ${ac_cv_build}"
435 AC_SUBST([MODVERSION])
436 AC_DEFINE_UNQUOTED(MODVERSION, "$MODVERSION")
437 AH_TEMPLATE([MODVERSION], [Identifier for modules in the build.])
439 AC_CHECK_SIZEOF(long)
441 # On aarch64 before glibc 2.20 we would get the kernel user_pt_regs instead
442 # of the user_regs_struct from sys/user.h. They are structurally the same
443 # but we get either one or the other.
444 AC_CHECK_TYPE([struct user_regs_struct],
445 [sys_user_has_user_regs=yes], [sys_user_has_user_regs=no],
446 [[#include <sys/ptrace.h>]
447 [#include <sys/time.h>]
448 [#include <sys/user.h>]])
449 if test "$sys_user_has_user_regs" = "yes"; then
450 AC_DEFINE(HAVE_SYS_USER_REGS, 1,
451 [Define to 1 if <sys/user.h> defines struct user_regs_struct])
454 # On a 64-bit host where can can use $CC -m32, we'll run two sets of tests.
455 # Likewise in a 32-bit build on a host where $CC -m64 works.
457 # `$utrace_biarch' will be `-m64' even on an uniarch i386 machine.
458 CC_BIARCH="$CC $utrace_biarch"
459 AC_SUBST([CC_BIARCH])
461 # In maintainer mode we really need flex and bison.
462 # Otherwise we really need a release dir with maintainer files generated.
463 if test "x$enable_maintainer_mode" = xyes; then
464 AC_CHECK_PROG(HAVE_FLEX, flex, yes, no)
465 if test "$HAVE_FLEX" = "no"; then
466 AC_MSG_ERROR([flex needed in maintainer mode])
468 AC_CHECK_PROG(HAVE_BISON, bison, yes, no)
469 if test "$HAVE_BISON" = "no"; then
470 AC_MSG_ERROR([bison needed in maintainer mode])
473 if test ! -f ${srcdir}/libdw/known-dwarf.h; then
474 AC_MSG_ERROR([No libdw/known-dwarf.h. configure --enable-maintainer-mode])
478 # The testfiles are all compressed, we need bunzip2 when running make check
479 AC_CHECK_PROG(HAVE_BUNZIP2, bunzip2, yes, no)
480 if test "$HAVE_BUNZIP2" = "no"; then
481 AC_MSG_WARN([No bunzip2, needed to run make check])
487 =====================================================================
488 elfutils: ${PACKAGE_VERSION} (eu_version: ${eu_version})
489 =====================================================================
492 Program prefix ("eu-" recommended) : ${program_prefix}
493 Source code location : ${srcdir}
494 Maintainer mode : ${enable_maintainer_mode}
495 libebl modules subdirectory : ${LIBEBL_SUBDIR}
496 build arch : ${ac_cv_build}
498 RECOMMENDED FEATURES (should all be yes)
499 gzip support : ${with_zlib}
500 bzip2 support : ${with_bzlib}
501 lzma/xz support : ${with_lzma}
502 libstdc++ demangle support : ${enable_demangler}
503 File textrel check : ${enable_textrelcheck}
504 Symbol versioning : ${enable_symbol_versioning}
506 NOT RECOMMENDED FEATURES (should all be no)
507 Experimental thread safety : ${use_locks}
510 Deterministic archives by default : ${default_ar_deterministic}
511 Native language support : ${USE_NLS}
513 EXTRA TEST FEATURES (used with make check)
514 have bunzip2 installed (required) : ${HAVE_BUNZIP2}
515 debug branch prediction : ${use_debugpred}
516 gprof support : ${use_gprof}
517 gcov support : ${use_gcov}
518 run all tests under valgrind : ${use_valgrind}
519 gcc undefined behaviour sanitizer : ${use_undefined}
520 use rpath in tests : ${tests_use_rpath}
521 test biarch : ${utrace_cv_cc_biarch}