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],[0.165],[https://bugzilla.redhat.com/],[elfutils])
22 AC_CONFIG_AUX_DIR([config])
23 AC_CONFIG_FILES([config/Makefile])
25 AC_COPYRIGHT([Copyright (C) 1996-2016 Red Hat, Inc.])
26 AC_PREREQ(2.63) dnl Minimum Autoconf version required.
28 dnl We use GNU make extensions; automake 1.10 defaults to -Wportability.
29 AM_INIT_AUTOMAKE([gnits 1.11 -Wno-portability dist-bzip2 no-dist-gzip parallel-tests])
32 AM_SILENT_RULES([yes])
34 AC_CONFIG_SRCDIR([libelf/libelf.h])
35 AC_CONFIG_FILES([Makefile])
36 AC_CONFIG_HEADERS([config.h])
38 AC_CONFIG_MACRO_DIR([m4])
39 AC_CONFIG_FILES([m4/Makefile])
41 dnl The RPM spec file. We substitute a few values in the file.
42 AC_CONFIG_FILES([elfutils.spec:config/elfutils.spec.in])
47 AC_ARG_ENABLE(deterministic-archives,
48 [AS_HELP_STRING([--enable-deterministic-archives],
49 [ar and ranlib default to -D behavior])], [
50 if test "${enableval}" = no; then
51 default_ar_deterministic=false
53 default_ar_deterministic=true
54 fi], [default_ar_deterministic=false])
55 AC_DEFINE_UNQUOTED(DEFAULT_AR_DETERMINISTIC, $default_ar_deterministic,
56 [Should ar and ranlib use -D behavior by default?])
58 AC_ARG_ENABLE([thread-safety],
59 AS_HELP_STRING([--enable-thread-safety],
60 [enable thread safety of libraries EXPERIMENTAL]),
61 use_locks=$enableval, use_locks=no)
62 AM_CONDITIONAL(USE_LOCKS, test "$use_locks" = yes)
63 AS_IF([test "$use_locks" = yes], [AC_DEFINE(USE_LOCKS)])
64 AS_IF([test "$use_locks" = yes],
65 [AC_MSG_WARN([thread-safety is EXPERIMENTAL tests might fail.])])
67 AH_TEMPLATE([USE_LOCKS], [Defined if libraries should be thread-safe.])
73 # Only available since automake 1.12
74 m4_ifdef([AM_PROG_AR], [AM_PROG_AR])
75 AC_CHECK_TOOL([READELF], [readelf])
76 AC_CHECK_TOOL([NM], [nm])
78 # We use -std=gnu99 but have explicit checks for some language constructs
79 # and GNU extensions since some compilers claim GNU99 support, but don't
80 # really support all language extensions. In particular we need
81 # Mixed Declarations and Code
82 # https://gcc.gnu.org/onlinedocs/gcc/Mixed-Declarations.html
84 # https://gcc.gnu.org/onlinedocs/gcc/Nested-Functions.html
85 # Arrays of Variable Length
86 # https://gcc.gnu.org/onlinedocs/gcc/Variable-Length.html
87 AC_CACHE_CHECK([for gcc with GNU99 support], ac_cv_c99, [dnl
89 CFLAGS="$CFLAGS -std=gnu99"
90 AC_COMPILE_IFELSE([AC_LANG_SOURCE([dnl
93 for (int i = 0; i < a; ++i) if (i % 4) break; int s = a; return s;
96 double bar (double a, double b)
98 double square (double z) { return z * z; }
99 return square (a) + square (b);
104 struct S { int x[[n]]; };
106 ac_cv_c99=yes, ac_cv_c99=no)
107 CFLAGS="$old_CFLAGS"])
108 AS_IF([test "x$ac_cv_c99" != xyes],
109 AC_MSG_ERROR([gcc with GNU99 support required]))
111 AC_CACHE_CHECK([for __thread support], ac_cv_tls, [dnl
112 # Use the same flags that we use for our DSOs, so the test is representative.
113 # Some old compiler/linker/libc combinations fail some ways and not others.
114 save_CFLAGS="$CFLAGS"
115 save_LDFLAGS="$LDFLAGS"
116 CFLAGS="-fPIC $CFLAGS"
117 LDFLAGS="-shared -Wl,-z,defs,-z,relro $LDFLAGS"
119 AC_LANG_PROGRAM([[#include <stdlib.h>
121 static __thread int a; int foo (int b) { return a + b; }]],
122 [[exit (foo (0));]])],
123 ac_cv_tls=yes, ac_cv_tls=no)
124 CFLAGS="$save_CFLAGS"
125 LDFLAGS="$save_LDFLAGS"])
126 AS_IF([test "x$ac_cv_tls" != xyes],
127 AC_MSG_ERROR([__thread support required]))
129 dnl This test must come as early as possible after the compiler configuration
130 dnl tests, because the choice of the file model can (in principle) affect
131 dnl whether functions and headers are available, whether they work, etc.
134 dnl Enable the linker to be build as a native-only linker. By default it
135 dnl can handle all architectures but this comes at a cost. A native
136 dnl will be slightly faster, small, and has fewer dependencies.
138 AC_ARG_ENABLE([generic],
139 AS_HELP_STRING([--disable-generic], [do not build generic linker]), [dnl
140 if test "$enable_generic" = no; then
143 AC_DEFINE(NATIVE_ELF, 32)
148 AC_MSG_ERROR([no machine-specific linker for this configuration available])
152 AH_TEMPLATE([NATIVE_ELF],
153 [Define to 32 or 64 if a specific implementation is wanted.])
154 AM_CONDITIONAL(NATIVE_LD, test "$native_ld" = yes)
155 dnl The automake generated Makefile cannot deal with macros in the name
156 dnl of files if at any time there is no such file, even if the filename
157 dnl would not be used.
158 AS_IF([test -z "$base_cpu"], [base_cpu=none])
160 dnl Support to work around automake's inflexible dependency generation.
161 dnl See src/Makefile.am for more information.
162 AM_CONDITIONAL(NEVER, false)
164 dnl enable debugging of branch prediction.
165 AC_ARG_ENABLE([debugpred],
166 AS_HELP_STRING([--enable-debugpred],[build binaries with support to debug branch prediction]),
167 [use_debugpred=$enableval], [use_debugpred=no])
168 case $use_debugpred in
169 yes) use_debugpred_val=1 ;;
170 *) use_debugpred_val=0 ;;
172 AC_SUBST([DEBUGPRED], $use_debugpred_val)
174 dnl Enable gprof suport.
175 AC_ARG_ENABLE([gprof],
176 AS_HELP_STRING([--enable-gprof],[build binaries with gprof support]), [use_gprof=$enableval], [use_gprof=no])
177 if test "$use_gprof" = yes; then
179 LDFLAGS="$LDFLAGS -pg"
181 AM_CONDITIONAL(GPROF, test "$use_gprof" = yes)
183 # Enable gcov suport.
184 AC_ARG_ENABLE([gcov],
185 AS_HELP_STRING([--enable-gcov],[build binaries with gcov support]), [use_gcov=$enableval], [use_gcov=no])
186 if test "$use_gcov" = yes; then
187 CFLAGS="$CFLAGS -fprofile-arcs -ftest-coverage"
188 LDFLAGS="$LDFLAGS -fprofile-arcs"
190 AM_CONDITIONAL(GCOV, test "$use_gcov" = yes)
192 AC_ARG_ENABLE([sanitize-undefined],
193 AS_HELP_STRING([--enable-sanitize-undefined],
194 [Use gcc undefined behaviour sanitizer]),
195 [use_undefined=$enableval], [use_undefined=no])
196 if test "$use_undefined" = yes; then
198 old_CXXFLAGS="$CXXFLAGS"
199 # We explicitly use unaligned access when possible (see ALLOW_UNALIGNED)
200 # We want to fail immediately on first error, don't try to recover.
201 CFLAGS="$CFLAGS -fsanitize=undefined -fno-sanitize-recover"
202 CXXFLAGS="$CXXFLAGS -fsanitize=undefined -fno-sanitize-recover"
203 AC_LINK_IFELSE([AC_LANG_SOURCE([int main (int argc, char **argv) { return 0; }])], use_undefined=yes, use_undefined=no)
204 AS_IF([test "x$use_undefined" != xyes],
205 AC_MSG_WARN([gcc undefined behaviour sanitizer not available])
206 CFLAGS="$old_CFLAGS" CXXFLAGS="$old_CXXFLAGS")
208 case $use_undefined in
209 yes) check_undefined_val=1 ;;
210 *) check_undefined_val=0 ;;
212 AC_DEFINE_UNQUOTED(CHECK_UNDEFINED, $check_undefined_val,
213 [Building with -fsanitize=undefined or not])
215 AC_ARG_ENABLE([valgrind],
216 AS_HELP_STRING([--enable-valgrind],[run all tests under valgrind]),
217 [use_valgrind=$enableval], [use_valgrind=no])
218 if test "$use_valgrind" = yes; then
219 AC_CHECK_PROG(HAVE_VALGRIND, valgrind, yes, no)
220 if test "$HAVE_VALGRIND" = "no"; then
221 AC_MSG_ERROR([valgrind not found])
224 AM_CONDITIONAL(USE_VALGRIND, test "$use_valgrind" = yes)
226 AM_CONDITIONAL(BUILD_STATIC, [dnl
227 test "$use_gprof" = yes -o "$use_gcov" = yes])
229 AC_ARG_ENABLE([tests-rpath],
230 AS_HELP_STRING([--enable-tests-rpath],[build $ORIGIN-using rpath into tests]),
231 [tests_use_rpath=$enableval], [tests_use_rpath=no])
232 AM_CONDITIONAL(TESTS_RPATH, test "$tests_use_rpath" = yes)
234 LIBEBL_SUBDIR="$PACKAGE"
235 AC_ARG_ENABLE([libebl-subdir],
236 AS_HELP_STRING([--enable-libebl-subdir=DIR],
237 [install libebl_CPU modules in $(libdir)/DIR]), [dnl
238 LIBEBL_SUBDIR="$enable_libebl_subdir"])
239 AC_SUBST([LIBEBL_SUBDIR])
240 AC_DEFINE_UNQUOTED(LIBEBL_SUBDIR, "$LIBEBL_SUBDIR")
241 AH_TEMPLATE([LIBEBL_SUBDIR], [$libdir subdirectory containing libebl modules.])
243 dnl zlib is mandatory.
246 eu_ZIPLIB(zlib,ZLIB,z,gzdirect,gzip)
247 AS_IF([test "x$with_zlib" = xno], [AC_MSG_ERROR([zlib not found but is required])])
250 dnl Test for bzlib and xz/lzma, gives BZLIB/LZMALIB .am
251 dnl conditional and config.h USE_BZLIB/USE_LZMALIB #define.
254 eu_ZIPLIB(bzlib,BZLIB,bz2,BZ2_bzdopen,bzip2)
255 # We need this since bzip2 doesn't have a pkgconfig file.
258 eu_ZIPLIB(lzma,LZMA,lzma,lzma_auto_decoder,[LZMA (xz)])
259 AS_IF([test "x$with_lzma" = xyes], [LIBLZMA="liblzma"], [LIBLZMA=""])
265 AC_CHECK_LIB([stdc++], [__cxa_demangle], [dnl
266 AC_DEFINE([USE_DEMANGLE], [1], [Defined if demangling is enabled])])
267 AM_CONDITIONAL(DEMANGLE, test "x$ac_cv_lib_stdcpp___cxa_demangle" = "xyes")
268 AS_IF([test "x$ac_cv_lib_stdcpp___cxa_demangle" = "xyes"],
269 [enable_demangler=yes],[enable_demangler=no])
271 AC_ARG_ENABLE([textrelcheck],
272 AS_HELP_STRING([--disable-textrelcheck],
273 [Disable textrelcheck being a fatal error]))
274 AM_CONDITIONAL(FATAL_TEXTREL, [test "x$enable_textrelcheck" != "xno"])
275 AS_IF([test "x$enable_textrelcheck" != "xno"],
276 [enable_textrelcheck=yes],[enable_textrelcheck=no])
278 AC_ARG_ENABLE([symbol-versioning],
279 AS_HELP_STRING([--disable-symbol-versioning],
280 [Disable symbol versioning in shared objects]))
281 AM_CONDITIONAL(SYMBOL_VERSIONING, [test "x$enable_symbol_versioning" != "xno"])
282 AS_IF([test "x$enable_symbol_versioning" = "xno"],
283 [AC_MSG_WARN([Disabling symbol versioning breaks ABI compatibility.])
284 enable_symbol_versioning=no],[enable_symbol_versioning=yes])
286 AC_CACHE_CHECK([whether gcc accepts -Wstack-usage], ac_cv_stack_usage, [dnl
288 CFLAGS="$CFLAGS -Wstack-usage=262144"
289 AC_COMPILE_IFELSE([AC_LANG_SOURCE([])],
290 ac_cv_stack_usage=yes, ac_cv_stack_usage=no)
291 CFLAGS="$old_CFLAGS"])
292 AM_CONDITIONAL(ADD_STACK_USAGE_WARNING, [test "x$ac_cv_stack_usage" != "xno"])
294 dnl Check if we have argp available from our libc
298 [int argc=1; char *argv[]={"test"}; argp_parse(0,argc,argv,0,0,0); return 0;]
300 [libc_has_argp="true"],
301 [libc_has_argp="false"]
304 dnl If our libc doesn't provide argp, then test for libargp
305 if test "$libc_has_argp" = "false" ; then
306 AC_MSG_WARN("libc does not have argp")
307 AC_CHECK_LIB([argp], [argp_parse], [have_argp="true"], [have_argp="false"])
309 if test "$have_argp" = "false"; then
310 AC_MSG_ERROR("no libargp found")
317 AC_SUBST([argp_LDADD])
319 dnl The directories with content.
322 dnl Commented out for now.
323 dnl AC_CONFIG_FILES([doc/Makefile])
326 AC_CONFIG_FILES([lib/Makefile])
329 AC_CONFIG_FILES([libelf/Makefile])
331 dnl Higher-level ELF support library.
332 AC_CONFIG_FILES([libebl/Makefile])
334 dnl DWARF-ELF Lower-level Functions support library.
335 AC_CONFIG_FILES([libdwelf/Makefile])
338 AC_CONFIG_FILES([libdw/Makefile])
340 dnl Higher-level DWARF support library.
341 AC_CONFIG_FILES([libdwfl/Makefile])
343 dnl CPU handling library.
344 AC_CONFIG_FILES([libcpu/Makefile])
346 dnl Assembler library.
347 AM_CONDITIONAL(HAVE_LIBASM, true)dnl Used in tests/Makefile.am, which see.
348 AC_CONFIG_FILES([libasm/Makefile])
350 dnl CPU-specific backend libraries.
351 AC_CONFIG_FILES([backends/Makefile])
354 AC_CONFIG_FILES([src/Makefile po/Makefile.in])
357 AM_CONDITIONAL(STANDALONE, false)dnl Used in tests/Makefile.am, which see.
358 AC_CONFIG_FILES([tests/Makefile])
361 AC_CONFIG_FILES([config/libelf.pc config/libdw.pc])
363 # Get the definitions necessary to create the Makefiles in the po
364 # subdirectories. This is a small subset of the gettext rules.
365 AC_SUBST(USE_NLS, yes)
368 dnl Appended to the config.h file.
369 dnl We hide all kinds of configuration magic in lib/eu-config.h.
370 AH_BOTTOM([#include <eu-config.h>])
372 dnl Version compatibility header.
373 AC_CONFIG_FILES([version.h:config/version.h.in])
374 AC_SUBST([eu_version])
376 # 1.234<whatever> -> 1234<whatever>
377 case "$PACKAGE_VERSION" in
378 [[0-9]].*) eu_version=`echo "$PACKAGE_VERSION" | sed 's@\.@@'` ;;
379 *) AC_MSG_ERROR([confused by version number '$PACKAGE_VERSION']) ;;
381 case "$eu_version" in
383 # 1234.567 -> "1234", "567"
384 eu_extra_version="${eu_version#*.}"
385 eu_version="${eu_version%%.*}"
386 case "$eu_extra_version" in
387 [[0-9]][[0-9]][[0-9]]) ;;
388 [[0-9]][[0-9]]) eu_extra_version="${eu_extra_version}0" ;;
389 [[0-9]]) eu_extra_version="${eu_extra_version}00" ;;
390 *) AC_MSG_ERROR([confused by version number '$PACKAGE_VERSION']) ;;
398 case "$eu_version" in
399 0[[0-9]][[0-9]][[0-9]]) eu_version="${eu_version#0}$eu_extra_version" ;;
400 [[0-9]][[0-9]][[0-9]][[0-9]]) eu_version="${eu_version}$eu_extra_version" ;;
401 [[0-9]][[0-9]][[0-9]]) eu_version="${eu_version}0$eu_extra_version" ;;
402 [[0-9]][[0-9]]) eu_version="${eu_version}00$eu_extra_version";;
403 *) AC_MSG_ERROR([confused by version number '$PACKAGE_VERSION']) ;;
406 # Round up to the next release API (x.y) version.
407 eu_version=$(( (eu_version + 999) / 1000 ))
409 dnl Unique ID for this build.
410 MODVERSION="Build for ${LIBEBL_SUBDIR} ${eu_version} ${ac_cv_build}"
411 AC_SUBST([MODVERSION])
412 AC_DEFINE_UNQUOTED(MODVERSION, "$MODVERSION")
413 AH_TEMPLATE([MODVERSION], [Identifier for modules in the build.])
415 AC_CHECK_SIZEOF(long)
417 # On aarch64 before glibc 2.20 we would get the kernel user_pt_regs instead
418 # of the user_regs_struct from sys/user.h. They are structurally the same
419 # but we get either one or the other.
420 AC_CHECK_TYPE([struct user_regs_struct],
421 [sys_user_has_user_regs=yes], [sys_user_has_user_regs=no],
422 [[#include <sys/ptrace.h>]
423 [#include <sys/time.h>]
424 [#include <sys/user.h>]])
425 if test "$sys_user_has_user_regs" = "yes"; then
426 AC_DEFINE(HAVE_SYS_USER_REGS, 1,
427 [Define to 1 if <sys/user.h> defines struct user_regs_struct])
430 # On a 64-bit host where can can use $CC -m32, we'll run two sets of tests.
431 # Likewise in a 32-bit build on a host where $CC -m64 works.
433 # `$utrace_biarch' will be `-m64' even on an uniarch i386 machine.
434 CC_BIARCH="$CC $utrace_biarch"
435 AC_SUBST([CC_BIARCH])
437 # In maintainer mode we really need flex and bison.
438 # Otherwise we really need a release dir with maintainer files generated.
439 if test "x$enable_maintainer_mode" = xyes; then
440 AC_CHECK_PROG(HAVE_FLEX, flex, yes, no)
441 if test "$HAVE_FLEX" = "no"; then
442 AC_MSG_ERROR([flex needed in maintainer mode])
444 AC_CHECK_PROG(HAVE_BISON, bison, yes, no)
445 if test "$HAVE_BISON" = "no"; then
446 AC_MSG_ERROR([bison needed in maintainer mode])
449 if test ! -f ${srcdir}/libdw/known-dwarf.h; then
450 AC_MSG_ERROR([No libdw/known-dwarf.h. configure --enable-maintainer-mode])
454 # The testfiles are all compressed, we need bunzip2 when running make check
455 AC_CHECK_PROG(HAVE_BUNZIP2, bunzip2, yes, no)
456 if test "$HAVE_BUNZIP2" = "no"; then
457 AC_MSG_WARN([No bunzip2, needed to run make check])
463 =====================================================================
464 elfutils: ${PACKAGE_VERSION} (eu_version: ${eu_version})
465 =====================================================================
468 Program prefix ("eu-" recommended) : ${program_prefix}
469 Source code location : ${srcdir}
470 Maintainer mode : ${enable_maintainer_mode}
471 libebl modules subdirectory : ${LIBEBL_SUBDIR}
472 build arch : ${ac_cv_build}
474 RECOMMENDED FEATURES (should all be yes)
475 gzip support : ${with_zlib}
476 bzip2 support : ${with_bzlib}
477 lzma/xz support : ${with_lzma}
478 libstdc++ demangle support : ${enable_demangler}
479 File textrel check : ${enable_textrelcheck}
480 Symbol versioning : ${enable_symbol_versioning}
482 NOT RECOMMENDED FEATURES (should all be no)
483 Experimental thread safety : ${use_locks}
486 Deterministic archives by default : ${default_ar_deterministic}
487 Native language support : ${USE_NLS}
489 EXTRA TEST FEATURES (used with make check)
490 have bunzip2 installed (required) : ${HAVE_BUNZIP2}
491 debug branch prediction : ${use_debugpred}
492 gprof support : ${use_gprof}
493 gcov support : ${use_gcov}
494 run all tests under valgrind : ${use_valgrind}
495 gcc undefined behaviour sanitizer : ${use_undefined}
496 use rpath in tests : ${tests_use_rpath}
497 test biarch : ${utrace_cv_cc_biarch}