dnl Process this file with autoconf to produce a configure script.

dnl Configure input file for elfutils.                     -*-autoconf-*-

dnl

dnl Copyright (C) 1996-2019 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],[0.180],[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) 1996-2020 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])

dnl debuginfo-server client & server parts.

AC_CONFIG_FILES([debuginfod/Makefile])

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([whether gcc supports __attribute__((visibility()))],

	ac_cv_visibility, [dnl

save_CFLAGS="$CFLAGS"

CFLAGS="$save_CFLAGS -Werror"

AC_COMPILE_IFELSE([AC_LANG_SOURCE([dnl

int __attribute__((visibility("hidden")))

foo (int a)

{

  return a;

}])], ac_cv_visibility=yes, ac_cv_visibility=no)

CFLAGS="$save_CFLAGS"])

if test "$ac_cv_visibility" = "yes"; then

	AC_DEFINE([HAVE_VISIBILITY], [1],

		  [Defined if __attribute__((visibility())) is supported])

fi

AC_CACHE_CHECK([whether gcc supports __attribute__((gcc_struct))],

	ac_cv_gcc_struct, [dnl

save_CFLAGS="$CFLAGS"

CFLAGS="$save_CFLAGS -Werror"

AC_COMPILE_IFELSE([AC_LANG_SOURCE([dnl

struct test { int x; } __attribute__((gcc_struct));

])], ac_cv_gcc_struct=yes, ac_cv_gcc_struct=no)

CFLAGS="$save_CFLAGS"])

if test "$ac_cv_gcc_struct" = "yes"; then

	AC_DEFINE([HAVE_GCC_STRUCT], [1],

		  [Defined if __attribute__((gcc_struct)) is supported])

fi

AC_CACHE_CHECK([whether gcc supports -fPIC], ac_cv_fpic, [dnl

save_CFLAGS="$CFLAGS"

CFLAGS="$save_CFLAGS -fPIC -Werror"

AC_COMPILE_IFELSE([AC_LANG_SOURCE()], ac_cv_fpic=yes, ac_cv_fpic=no)

CFLAGS="$save_CFLAGS"

])

if test "$ac_cv_fpic" = "yes"; then

	fpic_CFLAGS="-fPIC"

else

	fpic_CFLAGS=""

fi

AC_SUBST([fpic_CFLAGS])

AC_CACHE_CHECK([whether gcc supports -fPIE], ac_cv_fpie, [dnl

save_CFLAGS="$CFLAGS"

CFLAGS="$save_CFLAGS -fPIE -Werror"

AC_COMPILE_IFELSE([AC_LANG_SOURCE()], ac_cv_fpie=yes, ac_cv_fpie=no)

CFLAGS="$save_CFLAGS"

])

if test "$ac_cv_fpie" = "yes"; then

	fpie_CFLAGS="-fPIE"

else

	fpie_CFLAGS=""

fi

AC_SUBST([fpie_CFLAGS])

dso_LDFLAGS="-shared"

ZDEFS_LDFLAGS="-Wl,-z,defs"

AC_CACHE_CHECK([whether gcc supports $ZDEFS_LDFLAGS], ac_cv_zdefs, [dnl

save_LDFLAGS="$LDFLAGS"

LDFLAGS="$ZDEFS_LDFLAGS $save_LDFLAGS"

AC_LINK_IFELSE([AC_LANG_PROGRAM()], ac_cv_zdefs=yes, ac_cv_zdefs=no)

LDFLAGS="$save_LDFLAGS"

])

if test "$ac_cv_zdefs" = "yes"; then

	dso_LDFLAGS="$dso_LDFLAGS $ZDEFS_LDFLAGS"

fi

# We really want build-ids. Warn and force generating them if gcc was

# configure without --enable-linker-build-id

AC_CACHE_CHECK([whether the compiler generates build-ids], ac_cv_buildid, [dnl

AC_LINK_IFELSE([AC_LANG_PROGRAM()],[ac_cv_buildid=yes; readelf -n conftest$EXEEXT | grep -q NT_GNU_BUILD_ID || ac_cv_buildid=no],AC_MSG_FAILURE([unexpected compile failure]))])

if test "$ac_cv_buildid" = "no"; then

	AC_MSG_WARN([compiler doesn't generate build-id by default])

	LDFLAGS="$LDFLAGS -Wl,--build-id"

fi

ZRELRO_LDFLAGS="-Wl,-z,relro"

AC_CACHE_CHECK([whether gcc supports $ZRELRO_LDFLAGS], ac_cv_zrelro, [dnl

save_LDFLAGS="$LDFLAGS"

LDFLAGS="$ZRELRO_LDFLAGS $save_LDFLAGS"

AC_LINK_IFELSE([AC_LANG_PROGRAM()], ac_cv_zrelro=yes, ac_cv_zrelro=no)

LDFLAGS="$save_LDFLAGS"

])

if test "$ac_cv_zrelro" = "yes"; then

	dso_LDFLAGS="$dso_LDFLAGS $ZRELRO_LDFLAGS"

fi

AC_SUBST([dso_LDFLAGS])

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 $CFLAGS"

LDFLAGS="$dso_LDFLAGS $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 Before 4.9 gcc doesn't ship stdatomic.h, but the nessesary atomics are

dnl available by (at least) 4.7. So if the system doesn't have a stdatomic.h we

dnl fall back on one copied from FreeBSD that handles the difference.

AC_CACHE_CHECK([whether gcc provides stdatomic.h], ac_cv_has_stdatomic,

  [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[#include <stdatomic.h>]])],

		     ac_cv_has_stdatomic=yes, ac_cv_has_stdatomic=no)])

AM_CONDITIONAL(HAVE_STDATOMIC_H, test "x$ac_cv_has_stdatomic" = xyes)

AS_IF([test "x$ac_cv_has_stdatomic" = xyes], [AC_DEFINE(HAVE_STDATOMIC_H)])

AH_TEMPLATE([HAVE_STDATOMIC_H], [Define to 1 if `stdatomic.h` is provided by the

                                 system, 0 otherwise.])

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 $CFLAGS -Werror"

    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"

  CXXFLAGS="$CXXFLAGS -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)

AC_ARG_WITH([valgrind],

AS_HELP_STRING([--with-valgrind],[include directory for Valgrind headers]),

[with_valgrind_headers=$withval], [with_valgrind_headers=no])

if test "x$with_valgrind_headers" != xno; then

    save_CFLAGS="$CFLAGS"

    CFLAGS="$CFLAGS -I$with_valgrind_headers"

    AC_COMPILE_IFELSE([AC_LANG_SOURCE([[

      #include <valgrind/valgrind.h>

      int main() { return 0; }

    ]])], [ HAVE_VALGRIND_HEADERS="yes"

            CFLAGS="$save_CFLAGS -I$with_valgrind_headers" ],

          [ AC_MSG_ERROR([invalid valgrind include directory: $with_valgrind_headers]) ])

fi

AC_ARG_ENABLE([valgrind-annotations],

AS_HELP_STRING([--enable-valgrind-annotations],[insert extra annotations for better valgrind support]),

[use_vg_annotations=$enableval], [use_vg_annotations=no])

if test "$use_vg_annotations" = yes; then

    if test "x$HAVE_VALGRIND_HEADERS" != "xyes"; then

      AC_MSG_CHECKING([whether Valgrind headers are available])

      AC_COMPILE_IFELSE([AC_LANG_SOURCE([[

        #include <valgrind/valgrind.h>

        int main() { return 0; }

      ]])], [ AC_MSG_RESULT([yes]) ],

            [ AC_MSG_ERROR([valgrind annotations requested but no headers are available]) ])

    fi

fi

AM_CONDITIONAL(USE_VG_ANNOTATIONS, test "$use_vg_annotations" = yes)

AC_ARG_ENABLE([install-elfh],

AS_HELP_STRING([--enable-install-elfh],[install elf.h in include dir]),

               [install_elfh=$enableval], [install_elfh=no])

AM_CONDITIONAL(INSTALL_ELFH, test "$install_elfh" = 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)

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_FUNCS([process_vm_readv])

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]))

AC_CACHE_CHECK([whether symbol versioning is supported], ac_cv_symbol_versioning, [dnl

AC_COMPILE_IFELSE([AC_LANG_SOURCE([dnl

#define NEW_VERSION(name, version) \

  asm (".symver " #name "," #name "@@@" #version);

int foo(int x) { return x + 1; }

NEW_VERSION (foo, ELFUTILS_12.12)

])], ac_cv_symbol_versioning=yes, ac_cv_symbol_versioning=no)])

if test "$ac_cv_symbol_versioning" = "no"; then

    if test "x$enable_symbol_versioning" != "xno"; then

        AC_MSG_ERROR([Symbol versioning is not supported.

                      Use --disable-symbol-versioning to build without.])

    fi

fi

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"])

# Assume the fallthrough attribute is supported if -Wimplict-fallthrough is supported

if test "$ac_cv_implicit_fallthrough" = "yes"; then

	AC_DEFINE([HAVE_FALLTHROUGH], [1],

		  [Defined if __attribute__((fallthrough)) is supported])

fi

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 The directories with content.

dnl Documentation.

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 config/libdebuginfod.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 ))

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

  AC_CHECK_PROG(HAVE_GAWK, gawk, yes, no)

  if test "$HAVE_GAWK" = "no"; then

    AC_MSG_ERROR([gawk 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

# Look for libmicrohttpd, libcurl, libarchive, sqlite for debuginfo server

# minimum versions as per rhel7.  Single --enable-* option arranges to build

# both client and server.

AC_ARG_ENABLE([debuginfod],AC_HELP_STRING([--enable-debuginfod], [Build debuginfod server and client]))

AC_PROG_CXX

AS_IF([test "x$enable_debuginfod" != "xno"], [

    AC_MSG_NOTICE([checking debuginfod C++11 support, --disable-debuginfod to skip])

    AX_CXX_COMPILE_STDCXX(11, noext, mandatory)

    AC_MSG_NOTICE([checking debuginfod dependencies, --disable-debuginfod to skip])

    enable_debuginfod=yes # presume success

    PKG_PROG_PKG_CONFIG

    PKG_CHECK_MODULES([libmicrohttpd],[libmicrohttpd >= 0.9.33],[],[enable_debuginfod=no])

    PKG_CHECK_MODULES([libcurl],[libcurl >= 7.29.0],[],[enable_debuginfod=no])

    PKG_CHECK_MODULES([sqlite3],[sqlite3 >= 3.7.17],[],[enable_debuginfod=no])

    PKG_CHECK_MODULES([libarchive],[libarchive >= 3.1.2],[],[enable_debuginfod=no])

    if test "x$enable_debuginfod" = "xno"; then

      AC_MSG_ERROR([dependencies not found, use --disable-debuginfod to disable.])

    fi

])

AS_IF([test "x$enable_debuginfod" != "xno"],AC_DEFINE([ENABLE_DEBUGINFOD],[1],[Build debuginfod]))

AM_CONDITIONAL([DEBUGINFOD],[test "x$enable_debuginfod" = "xyes"])

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}

    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}

    install elf.h                      : ${install_elfh}

  OTHER FEATURES

    Deterministic archives by default  : ${default_ar_deterministic}

    Native language support            : ${USE_NLS}

    Extra Valgrind annotations         : ${use_vg_annotations}

    Debuginfod client/server support   : ${enable_debuginfod}

  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}

])

if test "$install_elfh" = yes; then

  if test "${prefix}" = "/usr/local" -o "${prefix}" = "/usr"; then

    AC_MSG_WARN([installing elf.h in ${includedir} might conflict with glibc/system elf.h])

  fi

fi