configure.ac - platform/external/elfutils - Gitiles

 dnl Process this file with autoconf to produce a configure script.
 dnl Configure input file for elfutils.                     -*-autoconf-*-
 dnl
 dnl Copyright (C) 1996-2016 Red Hat, Inc.
 dnl
 dnl This file is part of elfutils.
 dnl
 dnl  This file is free software; you can redistribute it and/or modify
 dnl  it under the terms of the GNU General Public License as published by
 dnl  the Free Software Foundation; either version 3 of the License, or
 dnl  (at your option) any later version.
 dnl
 dnl  elfutils is distributed in the hope that it will be useful, but
 dnl  WITHOUT ANY WARRANTY; without even the implied warranty of
 dnl  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 dnl  GNU General Public License for more details.
 dnl
 dnl  You should have received a copy of the GNU General Public License
 dnl  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 AC_INIT([elfutils],[0.168],[https://sourceware.org/bugzilla],[elfutils],[http://elfutils.org/])

 dnl Workaround for older autoconf < 2.64
 m4_ifndef([AC_PACKAGE_URL],
          [AC_DEFINE([PACKAGE_URL], ["http://elfutils.org/"],
                     [Define to home page for this package])
           AC_SUBST([PACKAGE_URL], ["http://elfutils.org/"])])

 # We want eu- as default program prefix if none was given by the user.
 # But if the user explicitly provided --program-prefix="" then pretend
 # it wasn't set at all (NONE). We want to test this really early before
 # configure has a chance to use the value.

 if test "x$program_prefix" = "xNONE"; then
   AC_MSG_NOTICE([No --program-prefix given, using "eu-"])
   program_prefix="eu-"
 elif test "x$program_prefix" = "x"; then
   AC_MSG_NOTICE([Using no program-prefix])
   program_prefix=NONE
 fi

 AC_CONFIG_AUX_DIR([config])
 AC_CONFIG_FILES([config/Makefile])

 AC_COPYRIGHT([Copyright (C) 1996-2016 The elfutils developers.])
 AC_PREREQ(2.63)			dnl Minimum Autoconf version required.

 dnl We use GNU make extensions; automake 1.10 defaults to -Wportability.
 AM_INIT_AUTOMAKE([gnits 1.11 -Wno-portability dist-bzip2 no-dist-gzip parallel-tests])
 AM_MAINTAINER_MODE

 AM_SILENT_RULES([yes])

 AC_CONFIG_SRCDIR([libelf/libelf.h])
 AC_CONFIG_FILES([Makefile])
 AC_CONFIG_HEADERS([config.h])

 AC_CONFIG_MACRO_DIR([m4])
 AC_CONFIG_FILES([m4/Makefile])

 dnl The RPM spec file.  We substitute a few values in the file.
 AC_CONFIG_FILES([elfutils.spec:config/elfutils.spec.in])


 AC_CANONICAL_HOST

 AC_ARG_ENABLE(deterministic-archives,
 [AS_HELP_STRING([--enable-deterministic-archives],
 		[ar and ranlib default to -D behavior])], [
 if test "${enableval}" = no; then
   default_ar_deterministic=false
 else
   default_ar_deterministic=true
 fi], [default_ar_deterministic=false])
 AC_DEFINE_UNQUOTED(DEFAULT_AR_DETERMINISTIC, $default_ar_deterministic,
 		   [Should ar and ranlib use -D behavior by default?])

 AC_ARG_ENABLE([thread-safety],
 AS_HELP_STRING([--enable-thread-safety],
                [enable thread safety of libraries EXPERIMENTAL]),
                use_locks=$enableval, use_locks=no)
 AM_CONDITIONAL(USE_LOCKS, test "$use_locks" = yes)
 AS_IF([test "$use_locks" = yes], [AC_DEFINE(USE_LOCKS)])
 AS_IF([test "$use_locks" = yes],
       [AC_MSG_WARN([thread-safety is EXPERIMENTAL tests might fail.])])

 AH_TEMPLATE([USE_LOCKS], [Defined if libraries should be thread-safe.])

 AC_PROG_CC
 AC_PROG_RANLIB
 AC_PROG_YACC
 AM_PROG_LEX
 # Only available since automake 1.12
 m4_ifdef([AM_PROG_AR], [AM_PROG_AR])
 AC_CHECK_TOOL([READELF], [readelf])
 AC_CHECK_TOOL([NM], [nm])

 # We use -std=gnu99 but have explicit checks for some language constructs
 # and GNU extensions since some compilers claim GNU99 support, but don't
 # really support all language extensions. In particular we need
 # Mixed Declarations and Code
 # https://gcc.gnu.org/onlinedocs/gcc/Mixed-Declarations.html
 # Nested Functions
 # https://gcc.gnu.org/onlinedocs/gcc/Nested-Functions.html
 # Arrays of Variable Length
 # https://gcc.gnu.org/onlinedocs/gcc/Variable-Length.html
 AC_CACHE_CHECK([for gcc with GNU99 support], ac_cv_c99, [dnl
 old_CFLAGS="$CFLAGS"
 CFLAGS="$CFLAGS -std=gnu99"
 AC_COMPILE_IFELSE([AC_LANG_SOURCE([dnl
 int foo (int a)
 {
   for (int i = 0; i < a; ++i) if (i % 4) break; int s = a; return s;
 }

 double bar (double a, double b)
 {
   double square (double z) { return z * z; }
   return square (a) + square (b);
 }

 void baz (int n)
 {
   struct S { int x[[n]]; };
 }])],
 		  ac_cv_c99=yes, ac_cv_c99=no)
 CFLAGS="$old_CFLAGS"])
 AS_IF([test "x$ac_cv_c99" != xyes],
       AC_MSG_ERROR([gcc with GNU99 support required]))

 AC_CACHE_CHECK([for __thread support], ac_cv_tls, [dnl
 # Use the same flags that we use for our DSOs, so the test is representative.
 # Some old compiler/linker/libc combinations fail some ways and not others.
 save_CFLAGS="$CFLAGS"
 save_LDFLAGS="$LDFLAGS"
 CFLAGS="-fPIC $CFLAGS"
 LDFLAGS="-shared -Wl,-z,defs,-z,relro $LDFLAGS"
 AC_LINK_IFELSE([dnl
 AC_LANG_PROGRAM([[#include <stdlib.h>
 #undef __thread
 static __thread int a; int foo (int b) { return a + b; }]],
 		[[exit (foo (0));]])],
 	       ac_cv_tls=yes, ac_cv_tls=no)
 CFLAGS="$save_CFLAGS"
 LDFLAGS="$save_LDFLAGS"])
 AS_IF([test "x$ac_cv_tls" != xyes],
       AC_MSG_ERROR([__thread support required]))

 dnl This test must come as early as possible after the compiler configuration
 dnl tests, because the choice of the file model can (in principle) affect
 dnl whether functions and headers are available, whether they work, etc.
 AC_SYS_LARGEFILE

 dnl Older glibc had a broken fts that didn't work with Large File Systems.
 dnl We want the version that can handler LFS, but include workaround if we
 dnl get a bad one. Add define to CFLAGS (not AC_DEFINE it) since we need to
 dnl check it before including config.h (which might define _FILE_OFFSET_BITS).
 AC_CACHE_CHECK([whether fts.h is bad when included (with LFS)], ac_cv_bad_fts,
   [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[#include <fts.h>]])],
 		     ac_cv_bad_fts=no, ac_cv_bad_fts=yes)])
 AS_IF([test "x$ac_cv_bad_fts" = "xyes"], [CFLAGS="$CFLAGS -DBAD_FTS=1"])

 # See if we can add -D_FORTIFY_SOURCE=2. Don't do it if it is already
 # (differently) defined or if it generates warnings/errors because we
 # don't use the right optimisation level (string.h will warn about that).
 AC_MSG_CHECKING([whether to add -D_FORTIFY_SOURCE=2 to CFLAGS])
 case "$CFLAGS" in
   *-D_FORTIFY_SOURCE=2*)
     AC_MSG_RESULT([no, already there])
     ;;
   *)
     save_CFLAGS="$CFLAGS"
     CFLAGS="-D_FORTIFY_SOURCE=2 -Werror $CFLAGS"
     AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
       #include <string.h>
       int main() { return 0; }
     ]])], [ AC_MSG_RESULT([yes])
             CFLAGS="-D_FORTIFY_SOURCE=2 $save_CFLAGS" ],
           [ AC_MSG_RESULT([no])
             CFLAGS="$save_CFLAGS"])
   ;;
 esac

 dnl enable debugging of branch prediction.
 AC_ARG_ENABLE([debugpred],
 AS_HELP_STRING([--enable-debugpred],[build binaries with support to debug branch prediction]),
 [use_debugpred=$enableval], [use_debugpred=no])
 case $use_debugpred in
  yes) use_debugpred_val=1 ;;
  *)   use_debugpred_val=0 ;;
 esac
 AC_SUBST([DEBUGPRED], $use_debugpred_val)

 dnl Enable gprof suport.
 AC_ARG_ENABLE([gprof],
 AS_HELP_STRING([--enable-gprof],[build binaries with gprof support]), [use_gprof=$enableval], [use_gprof=no])
 if test "$use_gprof" = yes; then
   CFLAGS="$CFLAGS -pg"
   LDFLAGS="$LDFLAGS -pg"
 fi
 AM_CONDITIONAL(GPROF, test "$use_gprof" = yes)

 # Enable gcov suport.
 AC_ARG_ENABLE([gcov],
 AS_HELP_STRING([--enable-gcov],[build binaries with gcov support]), [use_gcov=$enableval], [use_gcov=no])
 if test "$use_gcov" = yes; then
   CFLAGS="$CFLAGS -fprofile-arcs -ftest-coverage"
   LDFLAGS="$LDFLAGS -fprofile-arcs"
 fi
 AM_CONDITIONAL(GCOV, test "$use_gcov" = yes)

 AC_ARG_ENABLE([sanitize-undefined],
               AS_HELP_STRING([--enable-sanitize-undefined],
                              [Use gcc undefined behaviour sanitizer]),
                              [use_undefined=$enableval], [use_undefined=no])
 if test "$use_undefined" = yes; then
   old_CFLAGS="$CFLAGS"
   old_CXXFLAGS="$CXXFLAGS"
   # We explicitly use unaligned access when possible (see ALLOW_UNALIGNED)
   # We want to fail immediately on first error, don't try to recover.
   CFLAGS="$CFLAGS -fsanitize=undefined -fno-sanitize-recover"
   CXXFLAGS="$CXXFLAGS -fsanitize=undefined -fno-sanitize-recover"
   AC_LINK_IFELSE([AC_LANG_SOURCE([int main (int argc, char **argv) { return 0; }])], use_undefined=yes, use_undefined=no)
   AS_IF([test "x$use_undefined" != xyes],
         AC_MSG_WARN([gcc undefined behaviour sanitizer not available])
         CFLAGS="$old_CFLAGS" CXXFLAGS="$old_CXXFLAGS")
 fi
 case $use_undefined in
  yes) check_undefined_val=1 ;;
  *)   check_undefined_val=0 ;;
 esac
 AC_DEFINE_UNQUOTED(CHECK_UNDEFINED, $check_undefined_val,
 		   [Building with -fsanitize=undefined or not])

 AC_ARG_ENABLE([valgrind],
 AS_HELP_STRING([--enable-valgrind],[run all tests under valgrind]),
 [use_valgrind=$enableval], [use_valgrind=no])
 if test "$use_valgrind" = yes; then
   AC_CHECK_PROG(HAVE_VALGRIND, valgrind, yes, no)
   if test "$HAVE_VALGRIND" = "no"; then
     AC_MSG_ERROR([valgrind not found])
   fi
 fi
 AM_CONDITIONAL(USE_VALGRIND, test "$use_valgrind" = yes)

 AM_CONDITIONAL(BUILD_STATIC, [dnl
 test "$use_gprof" = yes -o "$use_gcov" = yes])

 AC_ARG_ENABLE([tests-rpath],
 AS_HELP_STRING([--enable-tests-rpath],[build $ORIGIN-using rpath into tests]),
 	       [tests_use_rpath=$enableval], [tests_use_rpath=no])
 AM_CONDITIONAL(TESTS_RPATH, test "$tests_use_rpath" = yes)

 LIBEBL_SUBDIR="$PACKAGE"
 AC_ARG_ENABLE([libebl-subdir],
 AS_HELP_STRING([--enable-libebl-subdir=DIR],
 [install libebl_CPU modules in $(libdir)/DIR]), [dnl
 LIBEBL_SUBDIR="$enable_libebl_subdir"])
 AC_SUBST([LIBEBL_SUBDIR])
 AC_DEFINE_UNQUOTED(LIBEBL_SUBDIR, "$LIBEBL_SUBDIR")
 AH_TEMPLATE([LIBEBL_SUBDIR], [$libdir subdirectory containing libebl modules.])

 dnl zlib is mandatory.
 save_LIBS="$LIBS"
 LIBS=
 eu_ZIPLIB(zlib,ZLIB,z,gzdirect,gzip)
 AS_IF([test "x$with_zlib" = xno], [AC_MSG_ERROR([zlib not found but is required])])
 LIBS="$save_LIBS"

 dnl Test for bzlib and xz/lzma, gives BZLIB/LZMALIB .am
 dnl conditional and config.h USE_BZLIB/USE_LZMALIB #define.
 save_LIBS="$LIBS"
 LIBS=
 eu_ZIPLIB(bzlib,BZLIB,bz2,BZ2_bzdopen,bzip2)
 # We need this since bzip2 doesn't have a pkgconfig file.
 BZ2_LIB="$LIBS"
 AC_SUBST([BZ2_LIB])
 eu_ZIPLIB(lzma,LZMA,lzma,lzma_auto_decoder,[LZMA (xz)])
 AS_IF([test "x$with_lzma" = xyes], [LIBLZMA="liblzma"], [LIBLZMA=""])
 AC_SUBST([LIBLZMA])
 zip_LIBS="$LIBS"
 LIBS="$save_LIBS"
 AC_SUBST([zip_LIBS])

 AC_CHECK_DECLS([memrchr, rawmemchr],[],[],
                [#define _GNU_SOURCE
                 #include <string.h>])
 AC_CHECK_DECLS([powerof2],[],[],[#include <sys/param.h>])
 AC_CHECK_DECLS([mempcpy],[],[],
                [#define _GNU_SOURCE
                 #include <string.h>])

 AC_CHECK_LIB([stdc++], [__cxa_demangle], [dnl
 AC_DEFINE([USE_DEMANGLE], [1], [Defined if demangling is enabled])])
 AM_CONDITIONAL(DEMANGLE, test "x$ac_cv_lib_stdcpp___cxa_demangle" = "xyes")
 AS_IF([test "x$ac_cv_lib_stdcpp___cxa_demangle" = "xyes"],
       [enable_demangler=yes],[enable_demangler=no])

 AC_ARG_ENABLE([textrelcheck],
 AS_HELP_STRING([--disable-textrelcheck],
                [Disable textrelcheck being a fatal error]))
 AM_CONDITIONAL(FATAL_TEXTREL, [test "x$enable_textrelcheck" != "xno"])
 AS_IF([test "x$enable_textrelcheck" != "xno"],
       [enable_textrelcheck=yes],[enable_textrelcheck=no])

 AC_ARG_ENABLE([symbol-versioning],
 AS_HELP_STRING([--disable-symbol-versioning],
                [Disable symbol versioning in shared objects]))
 AM_CONDITIONAL(SYMBOL_VERSIONING, [test "x$enable_symbol_versioning" != "xno"])
 AS_IF([test "x$enable_symbol_versioning" = "xno"],
       [AC_MSG_WARN([Disabling symbol versioning breaks ABI compatibility.])
        enable_symbol_versioning=no],[enable_symbol_versioning=yes])

 AC_CACHE_CHECK([whether gcc accepts -Wstack-usage], ac_cv_stack_usage, [dnl
 old_CFLAGS="$CFLAGS"
 CFLAGS="$CFLAGS -Wstack-usage=262144 -Werror"
 AC_COMPILE_IFELSE([AC_LANG_SOURCE([])],
 		  ac_cv_stack_usage=yes, ac_cv_stack_usage=no)
 CFLAGS="$old_CFLAGS"])
 AM_CONDITIONAL(ADD_STACK_USAGE_WARNING, [test "x$ac_cv_stack_usage" != "xno"])

 # -Wlogical-op was too fragile in the past, make sure we get a sane one.
 AC_CACHE_CHECK([whether gcc has a sane -Wlogical-op], ac_cv_logical_op, [dnl
 old_CFLAGS="$CFLAGS"
 CFLAGS="$CFLAGS -Wlogical-op -Werror"
 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
 	[#define FLAG 1
 	int f (int r, int f) { return (r && (FLAG || (FLAG & f))); }])],
 		  ac_cv_logical_op=yes, ac_cv_logical_op=no)
 CFLAGS="$old_CFLAGS"])
 AM_CONDITIONAL(SANE_LOGICAL_OP_WARNING,
 	       [test "x$ac_cv_logical_op" != "xno"])

 # -Wduplicated-cond was added by GCC6
 AC_CACHE_CHECK([whether gcc accepts -Wduplicated-cond], ac_cv_duplicated_cond, [dnl
 old_CFLAGS="$CFLAGS"
 CFLAGS="$CFLAGS -Wduplicated-cond -Werror"
 AC_COMPILE_IFELSE([AC_LANG_SOURCE([])],
 		  ac_cv_duplicated_cond=yes, ac_cv_duplicated_cond=no)
 CFLAGS="$old_CFLAGS"])
 AM_CONDITIONAL(HAVE_DUPLICATED_COND_WARNING,
 	       [test "x$ac_cv_duplicated_cond" != "xno"])

 # -Wnull-dereference was added by GCC6
 AC_CACHE_CHECK([whether gcc accepts -Wnull-dereference], ac_cv_null_dereference, [dnl
 old_CFLAGS="$CFLAGS"
 CFLAGS="$CFLAGS -Wnull-dereference -Werror"
 AC_COMPILE_IFELSE([AC_LANG_SOURCE([])],
 		  ac_cv_null_dereference=yes, ac_cv_null_dereference=no)
 CFLAGS="$old_CFLAGS"])
 AM_CONDITIONAL(HAVE_NULL_DEREFERENCE_WARNING,
 	       [test "x$ac_cv_null_dereference" != "xno"])

 # -Wimplicit-fallthrough was added by GCC7
 AC_CACHE_CHECK([whether gcc accepts -Wimplicit-fallthrough], ac_cv_implicit_fallthrough, [dnl
 old_CFLAGS="$CFLAGS"
 CFLAGS="$CFLAGS -Wimplicit-fallthrough -Werror"
 AC_COMPILE_IFELSE([AC_LANG_SOURCE([])],
 		  ac_cv_implicit_fallthrough=yes, ac_cv_implicit_fallthrough=no)
 CFLAGS="$old_CFLAGS"])
 AM_CONDITIONAL(HAVE_IMPLICIT_FALLTHROUGH_WARNING,
 	       [test "x$ac_cv_implicit_fallthrough" != "xno"])

 dnl Check if we have argp available from our libc
 AC_LINK_IFELSE(
 	[AC_LANG_PROGRAM(
 		[#include <argp.h>],
 		[int argc=1; char *argv[]={"test"}; argp_parse(0,argc,&argv,0,0,0); return 0;]
 		)],
 	[libc_has_argp="true"],
 	[libc_has_argp="false"]
 )

 dnl If our libc doesn't provide argp, then test for libargp
 if test "$libc_has_argp" = "false" ; then
 	AC_MSG_WARN("libc does not have argp")
 	AC_CHECK_LIB([argp], [argp_parse], [have_argp="true"], [have_argp="false"])

 	if test "$have_argp" = "false"; then
 		AC_MSG_ERROR("no libargp found")
 	else
 		argp_LDADD="-largp"
 	fi
 else
 	argp_LDADD=""
 fi
 AC_SUBST([argp_LDADD])

 dnl Check if we have <linux/bpf.h> for EM_BPF disassembly.
 AC_CHECK_HEADERS(linux/bpf.h)
 AM_CONDITIONAL(HAVE_LINUX_BPF_H, [test "x$ac_cv_header_linux_bpf_h" = "xyes"])

 dnl The directories with content.

 dnl Documentation.
 dnl Commented out for now.
 dnl AC_CONFIG_FILES([doc/Makefile])

 dnl Support library.
 AC_CONFIG_FILES([lib/Makefile])

 dnl ELF library.
 AC_CONFIG_FILES([libelf/Makefile])

 dnl Higher-level ELF support library.
 AC_CONFIG_FILES([libebl/Makefile])

 dnl DWARF-ELF Lower-level Functions support library.
 AC_CONFIG_FILES([libdwelf/Makefile])

 dnl DWARF library.
 AC_CONFIG_FILES([libdw/Makefile])

 dnl Higher-level DWARF support library.
 AC_CONFIG_FILES([libdwfl/Makefile])

 dnl CPU handling library.
 AC_CONFIG_FILES([libcpu/Makefile])

 dnl Assembler library.
 AM_CONDITIONAL(HAVE_LIBASM, true)dnl Used in tests/Makefile.am, which see.
 AC_CONFIG_FILES([libasm/Makefile])

 dnl CPU-specific backend libraries.
 AC_CONFIG_FILES([backends/Makefile])

 dnl Tools.
 AC_CONFIG_FILES([src/Makefile po/Makefile.in])

 dnl Test suite.
 AM_CONDITIONAL(STANDALONE, false)dnl Used in tests/Makefile.am, which see.
 AC_CONFIG_FILES([tests/Makefile])

 dnl pkgconfig files
 AC_CONFIG_FILES([config/libelf.pc config/libdw.pc])

 # Get the definitions necessary to create the Makefiles in the po
 # subdirectories.  This is a small subset of the gettext rules.
 AC_SUBST(USE_NLS, yes)
 AM_PO_SUBDIRS

 dnl Appended to the config.h file.
 dnl We hide all kinds of configuration magic in lib/eu-config.h.
 AH_BOTTOM([#include <eu-config.h>])

 dnl Version compatibility header.
 AC_CONFIG_FILES([version.h:config/version.h.in])
 AC_SUBST([eu_version])

 # 1.234<whatever> -> 1234<whatever>
 case "$PACKAGE_VERSION" in
 [[0-9]].*) eu_version=`echo "$PACKAGE_VERSION" | sed 's@\.@@'` ;;
 *)     	   AC_MSG_ERROR([confused by version number '$PACKAGE_VERSION']) ;;
 esac
 case "$eu_version" in
 *.*)
   # 1234.567 -> "1234", "567"
   eu_extra_version="${eu_version#*.}"
   eu_version="${eu_version%%.*}"
   case "$eu_extra_version" in
   [[0-9]][[0-9]][[0-9]]) ;;
   [[0-9]][[0-9]])	eu_extra_version="${eu_extra_version}0" ;;
   [[0-9]])	   	eu_extra_version="${eu_extra_version}00" ;;
   *) AC_MSG_ERROR([confused by version number '$PACKAGE_VERSION']) ;;
   esac
   ;;
 *)
   eu_extra_version=000
   ;;
 esac

 case "$eu_version" in
       0[[0-9]][[0-9]][[0-9]]) eu_version="${eu_version#0}$eu_extra_version" ;;
 [[0-9]][[0-9]][[0-9]][[0-9]]) eu_version="${eu_version}$eu_extra_version" ;;
 [[0-9]][[0-9]][[0-9]])	      eu_version="${eu_version}0$eu_extra_version" ;;
 [[0-9]][[0-9]])	  	      eu_version="${eu_version}00$eu_extra_version";;
 *) AC_MSG_ERROR([confused by version number '$PACKAGE_VERSION']) ;;
 esac

 # Round up to the next release API (x.y) version.
 eu_version=$(( (eu_version + 999) / 1000 ))

 dnl Unique ID for this build.
 MODVERSION="Build for ${LIBEBL_SUBDIR} ${eu_version} ${ac_cv_build}"
 AC_SUBST([MODVERSION])
 AC_DEFINE_UNQUOTED(MODVERSION, "$MODVERSION")
 AH_TEMPLATE([MODVERSION], [Identifier for modules in the build.])

 AC_CHECK_SIZEOF(long)

 # On aarch64 before glibc 2.20 we would get the kernel user_pt_regs instead
 # of the user_regs_struct from sys/user.h. They are structurally the same
 # but we get either one or the other.
 AC_CHECK_TYPE([struct user_regs_struct],
               [sys_user_has_user_regs=yes], [sys_user_has_user_regs=no],
               [[#include <sys/ptrace.h>]
                [#include <sys/time.h>]
                [#include <sys/user.h>]])
 if test "$sys_user_has_user_regs" = "yes"; then
   AC_DEFINE(HAVE_SYS_USER_REGS, 1,
             [Define to 1 if <sys/user.h> defines struct user_regs_struct])
 fi

 # On a 64-bit host where can can use $CC -m32, we'll run two sets of tests.
 # Likewise in a 32-bit build on a host where $CC -m64 works.
 utrace_BIARCH
 # `$utrace_biarch' will be `-m64' even on an uniarch i386 machine.
 CC_BIARCH="$CC $utrace_biarch"
 AC_SUBST([CC_BIARCH])

 # In maintainer mode we really need flex and bison.
 # Otherwise we really need a release dir with maintainer files generated.
 if test "x$enable_maintainer_mode" = xyes; then
   AC_CHECK_PROG(HAVE_FLEX, flex, yes, no)
   if test "$HAVE_FLEX" = "no"; then
     AC_MSG_ERROR([flex needed in maintainer mode])
   fi
   AC_CHECK_PROG(HAVE_BISON, bison, yes, no)
   if test "$HAVE_BISON" = "no"; then
     AC_MSG_ERROR([bison needed in maintainer mode])
   fi
 else
   if test ! -f ${srcdir}/libdw/known-dwarf.h; then
     AC_MSG_ERROR([No libdw/known-dwarf.h. configure --enable-maintainer-mode])
   fi
 fi

 # The testfiles are all compressed, we need bunzip2 when running make check
 AC_CHECK_PROG(HAVE_BUNZIP2, bunzip2, yes, no)
 if test "$HAVE_BUNZIP2" = "no"; then
   AC_MSG_WARN([No bunzip2, needed to run make check])
 fi

 AC_OUTPUT

 AC_MSG_NOTICE([
 =====================================================================
         elfutils: ${PACKAGE_VERSION} (eu_version: ${eu_version})
 =====================================================================

     Prefix                             : ${prefix}
     Program prefix ("eu-" recommended) : ${program_prefix}
     Source code location               : ${srcdir}
     Maintainer mode                    : ${enable_maintainer_mode}
     libebl modules subdirectory        : ${LIBEBL_SUBDIR}
     build arch                         : ${ac_cv_build}

   RECOMMENDED FEATURES (should all be yes)
     gzip support                       : ${with_zlib}
     bzip2 support                      : ${with_bzlib}
     lzma/xz support                    : ${with_lzma}
     libstdc++ demangle support         : ${enable_demangler}
     File textrel check                 : ${enable_textrelcheck}
     Symbol versioning                  : ${enable_symbol_versioning}

   NOT RECOMMENDED FEATURES (should all be no)
     Experimental thread safety         : ${use_locks}

   OTHER FEATURES
     Deterministic archives by default  : ${default_ar_deterministic}
     Native language support            : ${USE_NLS}

   EXTRA TEST FEATURES (used with make check)
     have bunzip2 installed (required)  : ${HAVE_BUNZIP2}
     debug branch prediction            : ${use_debugpred}
     gprof support                      : ${use_gprof}
     gcov support                       : ${use_gcov}
     run all tests under valgrind       : ${use_valgrind}
     gcc undefined behaviour sanitizer  : ${use_undefined}
     use rpath in tests                 : ${tests_use_rpath}
     test biarch                        : ${utrace_cv_cc_biarch}
 ])
	dnl Process this file with autoconf to produce a configure script.
	dnl Configure input file for elfutils. --autoconf--
	dnl
	dnl Copyright (C) 1996-2016 Red Hat, Inc.
	dnl
	dnl This file is part of elfutils.
	dnl
	dnl This file is free software; you can redistribute it and/or modify
	dnl it under the terms of the GNU General Public License as published by
	dnl the Free Software Foundation; either version 3 of the License, or
	dnl (at your option) any later version.
	dnl
	dnl elfutils is distributed in the hope that it will be useful, but
	dnl WITHOUT ANY WARRANTY; without even the implied warranty of
	dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	dnl GNU General Public License for more details.
	dnl
	dnl You should have received a copy of the GNU General Public License
	dnl along with this program. If not, see <http://www.gnu.org/licenses/>.
	AC_INIT([elfutils],[0.168],[https://sourceware.org/bugzilla],[elfutils],[http://elfutils.org/])

	dnl Workaround for older autoconf < 2.64
	m4_ifndef([AC_PACKAGE_URL],
	[AC_DEFINE([PACKAGE_URL], ["http://elfutils.org/"],
	[Define to home page for this package])
	AC_SUBST([PACKAGE_URL], ["http://elfutils.org/"])])

	# We want eu- as default program prefix if none was given by the user.
	# But if the user explicitly provided --program-prefix="" then pretend
	# it wasn't set at all (NONE). We want to test this really early before
	# configure has a chance to use the value.

	if test "x$program_prefix" = "xNONE"; then
	AC_MSG_NOTICE([No --program-prefix given, using "eu-"])
	program_prefix="eu-"
	elif test "x$program_prefix" = "x"; then
	AC_MSG_NOTICE([Using no program-prefix])
	program_prefix=NONE
	fi

	AC_CONFIG_AUX_DIR([config])
	AC_CONFIG_FILES([config/Makefile])

	AC_COPYRIGHT([Copyright (C) 1996-2016 The elfutils developers.])
	AC_PREREQ(2.63) dnl Minimum Autoconf version required.

	dnl We use GNU make extensions; automake 1.10 defaults to -Wportability.
	AM_INIT_AUTOMAKE([gnits 1.11 -Wno-portability dist-bzip2 no-dist-gzip parallel-tests])
	AM_MAINTAINER_MODE

	AM_SILENT_RULES([yes])

	AC_CONFIG_SRCDIR([libelf/libelf.h])
	AC_CONFIG_FILES([Makefile])
	AC_CONFIG_HEADERS([config.h])

	AC_CONFIG_MACRO_DIR([m4])
	AC_CONFIG_FILES([m4/Makefile])

	dnl The RPM spec file. We substitute a few values in the file.
	AC_CONFIG_FILES([elfutils.spec:config/elfutils.spec.in])


	AC_CANONICAL_HOST

	AC_ARG_ENABLE(deterministic-archives,
	[AS_HELP_STRING([--enable-deterministic-archives],
	[ar and ranlib default to -D behavior])], [
	if test "${enableval}" = no; then
	default_ar_deterministic=false
	else
	default_ar_deterministic=true
	fi], [default_ar_deterministic=false])
	AC_DEFINE_UNQUOTED(DEFAULT_AR_DETERMINISTIC, $default_ar_deterministic,
	[Should ar and ranlib use -D behavior by default?])

	AC_ARG_ENABLE([thread-safety],
	AS_HELP_STRING([--enable-thread-safety],
	[enable thread safety of libraries EXPERIMENTAL]),
	use_locks=$enableval, use_locks=no)
	AM_CONDITIONAL(USE_LOCKS, test "$use_locks" = yes)
	AS_IF([test "$use_locks" = yes], [AC_DEFINE(USE_LOCKS)])
	AS_IF([test "$use_locks" = yes],
	[AC_MSG_WARN([thread-safety is EXPERIMENTAL tests might fail.])])

	AH_TEMPLATE([USE_LOCKS], [Defined if libraries should be thread-safe.])

	AC_PROG_CC
	AC_PROG_RANLIB
	AC_PROG_YACC
	AM_PROG_LEX
	# Only available since automake 1.12
	m4_ifdef([AM_PROG_AR], [AM_PROG_AR])
	AC_CHECK_TOOL([READELF], [readelf])
	AC_CHECK_TOOL([NM], [nm])

	# We use -std=gnu99 but have explicit checks for some language constructs
	# and GNU extensions since some compilers claim GNU99 support, but don't
	# really support all language extensions. In particular we need
	# Mixed Declarations and Code
	# https://gcc.gnu.org/onlinedocs/gcc/Mixed-Declarations.html
	# Nested Functions
	# https://gcc.gnu.org/onlinedocs/gcc/Nested-Functions.html
	# Arrays of Variable Length
	# https://gcc.gnu.org/onlinedocs/gcc/Variable-Length.html
	AC_CACHE_CHECK([for gcc with GNU99 support], ac_cv_c99, [dnl
	old_CFLAGS="$CFLAGS"
	CFLAGS="$CFLAGS -std=gnu99"
	AC_COMPILE_IFELSE([AC_LANG_SOURCE([dnl
	int foo (int a)
	{
	for (int i = 0; i < a; ++i) if (i % 4) break; int s = a; return s;
	}

	double bar (double a, double b)
	{
	double square (double z) { return z * z; }
	return square (a) + square (b);
	}

	void baz (int n)
	{
	struct S { int x[[n]]; };
	}])],
	ac_cv_c99=yes, ac_cv_c99=no)
	CFLAGS="$old_CFLAGS"])
	AS_IF([test "x$ac_cv_c99" != xyes],
	AC_MSG_ERROR([gcc with GNU99 support required]))

	AC_CACHE_CHECK([for __thread support], ac_cv_tls, [dnl
	# Use the same flags that we use for our DSOs, so the test is representative.
	# Some old compiler/linker/libc combinations fail some ways and not others.
	save_CFLAGS="$CFLAGS"
	save_LDFLAGS="$LDFLAGS"
	CFLAGS="-fPIC $CFLAGS"
	LDFLAGS="-shared -Wl,-z,defs,-z,relro $LDFLAGS"
	AC_LINK_IFELSE([dnl
	AC_LANG_PROGRAM([[#include <stdlib.h>
	#undef __thread
	static __thread int a; int foo (int b) { return a + b; }]],
	[[exit (foo (0));]])],
	ac_cv_tls=yes, ac_cv_tls=no)
	CFLAGS="$save_CFLAGS"
	LDFLAGS="$save_LDFLAGS"])
	AS_IF([test "x$ac_cv_tls" != xyes],
	AC_MSG_ERROR([__thread support required]))

	dnl This test must come as early as possible after the compiler configuration
	dnl tests, because the choice of the file model can (in principle) affect
	dnl whether functions and headers are available, whether they work, etc.
	AC_SYS_LARGEFILE

	dnl Older glibc had a broken fts that didn't work with Large File Systems.
	dnl We want the version that can handler LFS, but include workaround if we
	dnl get a bad one. Add define to CFLAGS (not AC_DEFINE it) since we need to
	dnl check it before including config.h (which might define _FILE_OFFSET_BITS).
	AC_CACHE_CHECK([whether fts.h is bad when included (with LFS)], ac_cv_bad_fts,
	[AC_COMPILE_IFELSE([AC_LANG_SOURCE([[#include <fts.h>]])],
	ac_cv_bad_fts=no, ac_cv_bad_fts=yes)])
	AS_IF([test "x$ac_cv_bad_fts" = "xyes"], [CFLAGS="$CFLAGS -DBAD_FTS=1"])

	# See if we can add -D_FORTIFY_SOURCE=2. Don't do it if it is already
	# (differently) defined or if it generates warnings/errors because we
	# don't use the right optimisation level (string.h will warn about that).
	AC_MSG_CHECKING([whether to add -D_FORTIFY_SOURCE=2 to CFLAGS])
	case "$CFLAGS" in
	-D_FORTIFY_SOURCE=2)
	AC_MSG_RESULT([no, already there])
	;;
	*)
	save_CFLAGS="$CFLAGS"
	CFLAGS="-D_FORTIFY_SOURCE=2 -Werror $CFLAGS"
	AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
	#include <string.h>
	int main() { return 0; }
	]])], [ AC_MSG_RESULT([yes])
	CFLAGS="-D_FORTIFY_SOURCE=2 $save_CFLAGS" ],
	[ AC_MSG_RESULT([no])
	CFLAGS="$save_CFLAGS"])
	;;
	esac

	dnl enable debugging of branch prediction.
	AC_ARG_ENABLE([debugpred],
	AS_HELP_STRING([--enable-debugpred],[build binaries with support to debug branch prediction]),
	[use_debugpred=$enableval], [use_debugpred=no])
	case $use_debugpred in
	yes) use_debugpred_val=1 ;;
	*) use_debugpred_val=0 ;;
	esac
	AC_SUBST([DEBUGPRED], $use_debugpred_val)

	dnl Enable gprof suport.
	AC_ARG_ENABLE([gprof],
	AS_HELP_STRING([--enable-gprof],[build binaries with gprof support]), [use_gprof=$enableval], [use_gprof=no])
	if test "$use_gprof" = yes; then
	CFLAGS="$CFLAGS -pg"
	LDFLAGS="$LDFLAGS -pg"
	fi
	AM_CONDITIONAL(GPROF, test "$use_gprof" = yes)

	# Enable gcov suport.
	AC_ARG_ENABLE([gcov],
	AS_HELP_STRING([--enable-gcov],[build binaries with gcov support]), [use_gcov=$enableval], [use_gcov=no])
	if test "$use_gcov" = yes; then
	CFLAGS="$CFLAGS -fprofile-arcs -ftest-coverage"
	LDFLAGS="$LDFLAGS -fprofile-arcs"
	fi
	AM_CONDITIONAL(GCOV, test "$use_gcov" = yes)

	AC_ARG_ENABLE([sanitize-undefined],
	AS_HELP_STRING([--enable-sanitize-undefined],
	[Use gcc undefined behaviour sanitizer]),
	[use_undefined=$enableval], [use_undefined=no])
	if test "$use_undefined" = yes; then
	old_CFLAGS="$CFLAGS"
	old_CXXFLAGS="$CXXFLAGS"
	# We explicitly use unaligned access when possible (see ALLOW_UNALIGNED)
	# We want to fail immediately on first error, don't try to recover.
	CFLAGS="$CFLAGS -fsanitize=undefined -fno-sanitize-recover"
	CXXFLAGS="$CXXFLAGS -fsanitize=undefined -fno-sanitize-recover"
	AC_LINK_IFELSE([AC_LANG_SOURCE([int main (int argc, char **argv) { return 0; }])], use_undefined=yes, use_undefined=no)
	AS_IF([test "x$use_undefined" != xyes],
	AC_MSG_WARN([gcc undefined behaviour sanitizer not available])
	CFLAGS="$old_CFLAGS" CXXFLAGS="$old_CXXFLAGS")
	fi
	case $use_undefined in
	yes) check_undefined_val=1 ;;
	*) check_undefined_val=0 ;;
	esac
	AC_DEFINE_UNQUOTED(CHECK_UNDEFINED, $check_undefined_val,
	[Building with -fsanitize=undefined or not])

	AC_ARG_ENABLE([valgrind],
	AS_HELP_STRING([--enable-valgrind],[run all tests under valgrind]),
	[use_valgrind=$enableval], [use_valgrind=no])
	if test "$use_valgrind" = yes; then
	AC_CHECK_PROG(HAVE_VALGRIND, valgrind, yes, no)
	if test "$HAVE_VALGRIND" = "no"; then
	AC_MSG_ERROR([valgrind not found])
	fi
	fi
	AM_CONDITIONAL(USE_VALGRIND, test "$use_valgrind" = yes)

	AM_CONDITIONAL(BUILD_STATIC, [dnl
	test "$use_gprof" = yes -o "$use_gcov" = yes])

	AC_ARG_ENABLE([tests-rpath],
	AS_HELP_STRING([--enable-tests-rpath],[build $ORIGIN-using rpath into tests]),
	[tests_use_rpath=$enableval], [tests_use_rpath=no])
	AM_CONDITIONAL(TESTS_RPATH, test "$tests_use_rpath" = yes)

	LIBEBL_SUBDIR="$PACKAGE"
	AC_ARG_ENABLE([libebl-subdir],
	AS_HELP_STRING([--enable-libebl-subdir=DIR],
	[install libebl_CPU modules in $(libdir)/DIR]), [dnl
	LIBEBL_SUBDIR="$enable_libebl_subdir"])
	AC_SUBST([LIBEBL_SUBDIR])
	AC_DEFINE_UNQUOTED(LIBEBL_SUBDIR, "$LIBEBL_SUBDIR")
	AH_TEMPLATE([LIBEBL_SUBDIR], [$libdir subdirectory containing libebl modules.])

	dnl zlib is mandatory.
	save_LIBS="$LIBS"
	LIBS=
	eu_ZIPLIB(zlib,ZLIB,z,gzdirect,gzip)
	AS_IF([test "x$with_zlib" = xno], [AC_MSG_ERROR([zlib not found but is required])])
	LIBS="$save_LIBS"

	dnl Test for bzlib and xz/lzma, gives BZLIB/LZMALIB .am
	dnl conditional and config.h USE_BZLIB/USE_LZMALIB #define.
	save_LIBS="$LIBS"
	LIBS=
	eu_ZIPLIB(bzlib,BZLIB,bz2,BZ2_bzdopen,bzip2)
	# We need this since bzip2 doesn't have a pkgconfig file.
	BZ2_LIB="$LIBS"
	AC_SUBST([BZ2_LIB])
	eu_ZIPLIB(lzma,LZMA,lzma,lzma_auto_decoder,[LZMA (xz)])
	AS_IF([test "x$with_lzma" = xyes], [LIBLZMA="liblzma"], [LIBLZMA=""])
	AC_SUBST([LIBLZMA])
	zip_LIBS="$LIBS"
	LIBS="$save_LIBS"
	AC_SUBST([zip_LIBS])

	AC_CHECK_DECLS([memrchr, rawmemchr],[],[],
	[#define _GNU_SOURCE
	#include <string.h>])
	AC_CHECK_DECLS([powerof2],[],[],[#include <sys/param.h>])
	AC_CHECK_DECLS([mempcpy],[],[],
	[#define _GNU_SOURCE
	#include <string.h>])

	AC_CHECK_LIB([stdc++], [__cxa_demangle], [dnl
	AC_DEFINE([USE_DEMANGLE], [1], [Defined if demangling is enabled])])
	AM_CONDITIONAL(DEMANGLE, test "x$ac_cv_lib_stdcpp___cxa_demangle" = "xyes")
	AS_IF([test "x$ac_cv_lib_stdcpp___cxa_demangle" = "xyes"],
	[enable_demangler=yes],[enable_demangler=no])

	AC_ARG_ENABLE([textrelcheck],
	AS_HELP_STRING([--disable-textrelcheck],
	[Disable textrelcheck being a fatal error]))
	AM_CONDITIONAL(FATAL_TEXTREL, [test "x$enable_textrelcheck" != "xno"])
	AS_IF([test "x$enable_textrelcheck" != "xno"],
	[enable_textrelcheck=yes],[enable_textrelcheck=no])

	AC_ARG_ENABLE([symbol-versioning],
	AS_HELP_STRING([--disable-symbol-versioning],
	[Disable symbol versioning in shared objects]))
	AM_CONDITIONAL(SYMBOL_VERSIONING, [test "x$enable_symbol_versioning" != "xno"])
	AS_IF([test "x$enable_symbol_versioning" = "xno"],
	[AC_MSG_WARN([Disabling symbol versioning breaks ABI compatibility.])
	enable_symbol_versioning=no],[enable_symbol_versioning=yes])

	AC_CACHE_CHECK([whether gcc accepts -Wstack-usage], ac_cv_stack_usage, [dnl
	old_CFLAGS="$CFLAGS"
	CFLAGS="$CFLAGS -Wstack-usage=262144 -Werror"
	AC_COMPILE_IFELSE([AC_LANG_SOURCE([])],
	ac_cv_stack_usage=yes, ac_cv_stack_usage=no)
	CFLAGS="$old_CFLAGS"])
	AM_CONDITIONAL(ADD_STACK_USAGE_WARNING, [test "x$ac_cv_stack_usage" != "xno"])

	# -Wlogical-op was too fragile in the past, make sure we get a sane one.
	AC_CACHE_CHECK([whether gcc has a sane -Wlogical-op], ac_cv_logical_op, [dnl
	old_CFLAGS="$CFLAGS"
	CFLAGS="$CFLAGS -Wlogical-op -Werror"
	AC_COMPILE_IFELSE([AC_LANG_SOURCE(
	[#define FLAG 1
	int f (int r, int f) { return (r && (FLAG \|\| (FLAG & f))); }])],
	ac_cv_logical_op=yes, ac_cv_logical_op=no)
	CFLAGS="$old_CFLAGS"])
	AM_CONDITIONAL(SANE_LOGICAL_OP_WARNING,
	[test "x$ac_cv_logical_op" != "xno"])

	# -Wduplicated-cond was added by GCC6
	AC_CACHE_CHECK([whether gcc accepts -Wduplicated-cond], ac_cv_duplicated_cond, [dnl
	old_CFLAGS="$CFLAGS"
	CFLAGS="$CFLAGS -Wduplicated-cond -Werror"
	AC_COMPILE_IFELSE([AC_LANG_SOURCE([])],
	ac_cv_duplicated_cond=yes, ac_cv_duplicated_cond=no)
	CFLAGS="$old_CFLAGS"])
	AM_CONDITIONAL(HAVE_DUPLICATED_COND_WARNING,
	[test "x$ac_cv_duplicated_cond" != "xno"])

	# -Wnull-dereference was added by GCC6
	AC_CACHE_CHECK([whether gcc accepts -Wnull-dereference], ac_cv_null_dereference, [dnl
	old_CFLAGS="$CFLAGS"
	CFLAGS="$CFLAGS -Wnull-dereference -Werror"
	AC_COMPILE_IFELSE([AC_LANG_SOURCE([])],
	ac_cv_null_dereference=yes, ac_cv_null_dereference=no)
	CFLAGS="$old_CFLAGS"])
	AM_CONDITIONAL(HAVE_NULL_DEREFERENCE_WARNING,
	[test "x$ac_cv_null_dereference" != "xno"])

	# -Wimplicit-fallthrough was added by GCC7
	AC_CACHE_CHECK([whether gcc accepts -Wimplicit-fallthrough], ac_cv_implicit_fallthrough, [dnl
	old_CFLAGS="$CFLAGS"
	CFLAGS="$CFLAGS -Wimplicit-fallthrough -Werror"
	AC_COMPILE_IFELSE([AC_LANG_SOURCE([])],
	ac_cv_implicit_fallthrough=yes, ac_cv_implicit_fallthrough=no)
	CFLAGS="$old_CFLAGS"])
	AM_CONDITIONAL(HAVE_IMPLICIT_FALLTHROUGH_WARNING,
	[test "x$ac_cv_implicit_fallthrough" != "xno"])

	dnl Check if we have argp available from our libc
	AC_LINK_IFELSE(
	[AC_LANG_PROGRAM(
	[#include <argp.h>],
	[int argc=1; char *argv[]={"test"}; argp_parse(0,argc,&argv,0,0,0); return 0;]
	)],
	[libc_has_argp="true"],
	[libc_has_argp="false"]
	)

	dnl If our libc doesn't provide argp, then test for libargp
	if test "$libc_has_argp" = "false" ; then
	AC_MSG_WARN("libc does not have argp")
	AC_CHECK_LIB([argp], [argp_parse], [have_argp="true"], [have_argp="false"])

	if test "$have_argp" = "false"; then
	AC_MSG_ERROR("no libargp found")
	else
	argp_LDADD="-largp"
	fi
	else
	argp_LDADD=""
	fi
	AC_SUBST([argp_LDADD])

	dnl Check if we have <linux/bpf.h> for EM_BPF disassembly.
	AC_CHECK_HEADERS(linux/bpf.h)
	AM_CONDITIONAL(HAVE_LINUX_BPF_H, [test "x$ac_cv_header_linux_bpf_h" = "xyes"])

	dnl The directories with content.

	dnl Documentation.
	dnl Commented out for now.
	dnl AC_CONFIG_FILES([doc/Makefile])

	dnl Support library.
	AC_CONFIG_FILES([lib/Makefile])

	dnl ELF library.
	AC_CONFIG_FILES([libelf/Makefile])

	dnl Higher-level ELF support library.
	AC_CONFIG_FILES([libebl/Makefile])

	dnl DWARF-ELF Lower-level Functions support library.
	AC_CONFIG_FILES([libdwelf/Makefile])

	dnl DWARF library.
	AC_CONFIG_FILES([libdw/Makefile])

	dnl Higher-level DWARF support library.
	AC_CONFIG_FILES([libdwfl/Makefile])

	dnl CPU handling library.
	AC_CONFIG_FILES([libcpu/Makefile])

	dnl Assembler library.
	AM_CONDITIONAL(HAVE_LIBASM, true)dnl Used in tests/Makefile.am, which see.
	AC_CONFIG_FILES([libasm/Makefile])

	dnl CPU-specific backend libraries.
	AC_CONFIG_FILES([backends/Makefile])

	dnl Tools.
	AC_CONFIG_FILES([src/Makefile po/Makefile.in])

	dnl Test suite.
	AM_CONDITIONAL(STANDALONE, false)dnl Used in tests/Makefile.am, which see.
	AC_CONFIG_FILES([tests/Makefile])

	dnl pkgconfig files
	AC_CONFIG_FILES([config/libelf.pc config/libdw.pc])

	# Get the definitions necessary to create the Makefiles in the po
	# subdirectories. This is a small subset of the gettext rules.
	AC_SUBST(USE_NLS, yes)
	AM_PO_SUBDIRS

	dnl Appended to the config.h file.
	dnl We hide all kinds of configuration magic in lib/eu-config.h.
	AH_BOTTOM([#include <eu-config.h>])

	dnl Version compatibility header.
	AC_CONFIG_FILES([version.h:config/version.h.in])
	AC_SUBST([eu_version])

	# 1.234<whatever> -> 1234<whatever>
	case "$PACKAGE_VERSION" in
	[[0-9]].*) eu_version=`echo "$PACKAGE_VERSION" \| sed 's@\.@@'` ;;
	*) AC_MSG_ERROR([confused by version number '$PACKAGE_VERSION']) ;;
	esac
	case "$eu_version" in
	.)
	# 1234.567 -> "1234", "567"
	eu_extra_version="${eu_version#*.}"
	eu_version="${eu_version%%.*}"
	case "$eu_extra_version" in
	[[0-9]][[0-9]][[0-9]]) ;;
	[[0-9]][[0-9]]) eu_extra_version="${eu_extra_version}0" ;;
	[[0-9]]) eu_extra_version="${eu_extra_version}00" ;;
	*) AC_MSG_ERROR([confused by version number '$PACKAGE_VERSION']) ;;
	esac
	;;
	*)
	eu_extra_version=000
	;;
	esac

	case "$eu_version" in
	0[[0-9]][[0-9]][[0-9]]) eu_version="${eu_version#0}$eu_extra_version" ;;
	[[0-9]][[0-9]][[0-9]][[0-9]]) eu_version="${eu_version}$eu_extra_version" ;;
	[[0-9]][[0-9]][[0-9]]) eu_version="${eu_version}0$eu_extra_version" ;;
	[[0-9]][[0-9]]) eu_version="${eu_version}00$eu_extra_version";;
	*) AC_MSG_ERROR([confused by version number '$PACKAGE_VERSION']) ;;
	esac

	# Round up to the next release API (x.y) version.
	eu_version=$(( (eu_version + 999) / 1000 ))

	dnl Unique ID for this build.
	MODVERSION="Build for ${LIBEBL_SUBDIR} ${eu_version} ${ac_cv_build}"
	AC_SUBST([MODVERSION])
	AC_DEFINE_UNQUOTED(MODVERSION, "$MODVERSION")
	AH_TEMPLATE([MODVERSION], [Identifier for modules in the build.])

	AC_CHECK_SIZEOF(long)

	# On aarch64 before glibc 2.20 we would get the kernel user_pt_regs instead
	# of the user_regs_struct from sys/user.h. They are structurally the same
	# but we get either one or the other.
	AC_CHECK_TYPE([struct user_regs_struct],
	[sys_user_has_user_regs=yes], [sys_user_has_user_regs=no],
	[[#include <sys/ptrace.h>]
	[#include <sys/time.h>]
	[#include <sys/user.h>]])
	if test "$sys_user_has_user_regs" = "yes"; then
	AC_DEFINE(HAVE_SYS_USER_REGS, 1,
	[Define to 1 if <sys/user.h> defines struct user_regs_struct])
	fi

	# On a 64-bit host where can can use $CC -m32, we'll run two sets of tests.
	# Likewise in a 32-bit build on a host where $CC -m64 works.
	utrace_BIARCH
	# `$utrace_biarch' will be `-m64' even on an uniarch i386 machine.
	CC_BIARCH="$CC $utrace_biarch"
	AC_SUBST([CC_BIARCH])

	# In maintainer mode we really need flex and bison.
	# Otherwise we really need a release dir with maintainer files generated.
	if test "x$enable_maintainer_mode" = xyes; then
	AC_CHECK_PROG(HAVE_FLEX, flex, yes, no)
	if test "$HAVE_FLEX" = "no"; then
	AC_MSG_ERROR([flex needed in maintainer mode])
	fi
	AC_CHECK_PROG(HAVE_BISON, bison, yes, no)
	if test "$HAVE_BISON" = "no"; then
	AC_MSG_ERROR([bison needed in maintainer mode])
	fi
	else
	if test ! -f ${srcdir}/libdw/known-dwarf.h; then
	AC_MSG_ERROR([No libdw/known-dwarf.h. configure --enable-maintainer-mode])
	fi
	fi

	# The testfiles are all compressed, we need bunzip2 when running make check
	AC_CHECK_PROG(HAVE_BUNZIP2, bunzip2, yes, no)
	if test "$HAVE_BUNZIP2" = "no"; then
	AC_MSG_WARN([No bunzip2, needed to run make check])
	fi

	AC_OUTPUT

	AC_MSG_NOTICE([
	=====================================================================
	elfutils: ${PACKAGE_VERSION} (eu_version: ${eu_version})
	=====================================================================

	Prefix : ${prefix}
	Program prefix ("eu-" recommended) : ${program_prefix}
	Source code location : ${srcdir}
	Maintainer mode : ${enable_maintainer_mode}
	libebl modules subdirectory : ${LIBEBL_SUBDIR}
	build arch : ${ac_cv_build}

	RECOMMENDED FEATURES (should all be yes)
	gzip support : ${with_zlib}
	bzip2 support : ${with_bzlib}
	lzma/xz support : ${with_lzma}
	libstdc++ demangle support : ${enable_demangler}
	File textrel check : ${enable_textrelcheck}
	Symbol versioning : ${enable_symbol_versioning}

	NOT RECOMMENDED FEATURES (should all be no)
	Experimental thread safety : ${use_locks}

	OTHER FEATURES
	Deterministic archives by default : ${default_ar_deterministic}
	Native language support : ${USE_NLS}

	EXTRA TEST FEATURES (used with make check)
	have bunzip2 installed (required) : ${HAVE_BUNZIP2}
	debug branch prediction : ${use_debugpred}
	gprof support : ${use_gprof}
	gcov support : ${use_gcov}
	run all tests under valgrind : ${use_valgrind}
	gcc undefined behaviour sanitizer : ${use_undefined}
	use rpath in tests : ${tests_use_rpath}
	test biarch : ${utrace_cv_cc_biarch}
	])