++if BUILD_WERROR
++AM_CFLAGS += $(if $($(*F)_no_Werror),,-Werror)
++endif
++
+ if MUDFLAP
+ AM_CFLAGS += -fmudflap
+ libmudflap = -lmudflap
+--- elfutils/config/Makefile.in
++++ elfutils/config/Makefile.in
+@@ -76,6 +76,7 @@ INSTALL_PROGRAM = @INSTALL_PROGRAM@
+ INSTALL_SCRIPT = @INSTALL_SCRIPT@
+ INSTALL_STRIP_PROGRAM = @INSTALL_STRIP_PROGRAM@
+ LDFLAGS = @LDFLAGS@
++LD_AS_NEEDED = @LD_AS_NEEDED@
+ LEX = @LEX@
+ LEXLIB = @LEXLIB@
+ LEX_OUTPUT_ROOT = @LEX_OUTPUT_ROOT@
+@@ -105,6 +106,7 @@ SHELL = @SHELL@
+ STRIP = @STRIP@
+ USE_NLS = @USE_NLS@
+ VERSION = @VERSION@
++WEXTRA = @WEXTRA@
+ XGETTEXT = @XGETTEXT@
+ XGETTEXT_015 = @XGETTEXT_015@
+ XGETTEXT_EXTRA_OPTIONS = @XGETTEXT_EXTRA_OPTIONS@
+--- elfutils/config.h.in
++++ elfutils/config.h.in
+@@ -3,6 +3,9 @@
+ /* Should ar and ranlib use -D behavior by default? */
+ #undef DEFAULT_AR_DETERMINISTIC
+
++/* Have __builtin_popcount. */
++#undef HAVE_BUILTIN_POPCOUNT
++
+ /* $libdir subdirectory containing libebl modules. */
+ #undef LIBEBL_SUBDIR
+
+@@ -61,4 +64,7 @@
+ /* Define for large files, on AIX-style hosts. */
+ #undef _LARGE_FILES
+
++/* Stubbed out if missing compiler support. */
++#undef __thread
++
+ #include <eu-config.h>
+--- elfutils/configure
++++ elfutils/configure
+@@ -598,6 +598,8 @@ ZLIB_TRUE
+ LIBEBL_SUBDIR
+ TESTS_RPATH_FALSE
+ TESTS_RPATH_TRUE
++BUILD_WERROR_FALSE
++BUILD_WERROR_TRUE
+ BUILD_STATIC_FALSE
+ BUILD_STATIC_TRUE
+ GCOV_FALSE
+@@ -612,6 +614,8 @@ NEVER_TRUE
+ base_cpu
+ NATIVE_LD_FALSE
+ NATIVE_LD_TRUE
++LD_AS_NEEDED
++WEXTRA
+ LEXLIB
+ LEX_OUTPUT_ROOT
+ LEX
+@@ -722,6 +726,7 @@ enable_mudflap
+ enable_debugpred
+ enable_gprof
+ enable_gcov
++enable_werror
+ enable_tests_rpath
+ enable_libebl_subdir
+ with_zlib
+@@ -1373,6 +1378,7 @@ Optional Features:
+ prediction
+ --enable-gprof build binaries with gprof support
+ --enable-gcov build binaries with gcov support
++ --disable-werror do not build with -Werror
+ --enable-tests-rpath build $ORIGIN-using rpath into tests
+ --enable-libebl-subdir=DIR
+ install libebl_CPU modules in $(libdir)/DIR
+@@ -3890,6 +3896,130 @@ if test "x$ac_cv_c99" != xyes; then :
+ as_fn_error $? "gcc with C99 support required" "$LINENO" 5
+ fi
+
++{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for -Wextra option to $CC" >&5
++$as_echo_n "checking for -Wextra option to $CC... " >&6; }
++if ${ac_cv_cc_wextra+:} false; then :
++ $as_echo_n "(cached) " >&6
++else
++ old_CFLAGS="$CFLAGS"
++CFLAGS="$CFLAGS -Wextra"
++cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++/* end confdefs.h. */
++void foo (void) { }
++_ACEOF
++if ac_fn_c_try_compile "$LINENO"; then :
++ ac_cv_cc_wextra=yes
++else
++ ac_cv_cc_wextra=no
++fi
++rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
++CFLAGS="$old_CFLAGS"
++fi
++{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_cc_wextra" >&5
++$as_echo "$ac_cv_cc_wextra" >&6; }
++
++if test "x$ac_cv_cc_wextra" = xyes; then :
++ WEXTRA=-Wextra
++else
++ WEXTRA=-W
++fi
++
++{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for -fgnu89-inline option to $CC" >&5
++$as_echo_n "checking for -fgnu89-inline option to $CC... " >&6; }
++if ${ac_cv_cc_gnu89_inline+:} false; then :
++ $as_echo_n "(cached) " >&6
++else
++ old_CFLAGS="$CFLAGS"
++CFLAGS="$CFLAGS -fgnu89-inline -Werror"
++cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++/* end confdefs.h. */
++
++void foo (void)
++{
++ inline void bar (void) {}
++ bar ();
++}
++extern inline void baz (void) {}
++
++_ACEOF
++if ac_fn_c_try_compile "$LINENO"; then :
++ ac_cv_cc_gnu89_inline=yes
++else
++ ac_cv_cc_gnu89_inline=no
++fi
++rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
++CFLAGS="$old_CFLAGS"
++fi
++{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_cc_gnu89_inline" >&5
++$as_echo "$ac_cv_cc_gnu89_inline" >&6; }
++if test "x$ac_cv_cc_gnu89_inline" = xyes; then :
++ WEXTRA="${WEXTRA:+$WEXTRA }-fgnu89-inline"
++fi
++
++{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for --as-needed linker option" >&5
++$as_echo_n "checking for --as-needed linker option... " >&6; }
++if ${ac_cv_as_needed+:} false; then :
++ $as_echo_n "(cached) " >&6
++else
++ cat > conftest.c <<EOF
++int main (void) { return 0; }
++EOF
++if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
++ -fPIC -shared -o conftest.so conftest.c
++ -Wl,--as-needed 1>&5'
++ { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
++ (eval $ac_try) 2>&5
++ ac_status=$?
++ $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
++ test $ac_status = 0; }; }
++then
++ ac_cv_as_needed=yes
++else
++ ac_cv_as_needed=no
++fi
++rm -f conftest*
++fi
++{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_as_needed" >&5
++$as_echo "$ac_cv_as_needed" >&6; }
++if test "x$ac_cv_as_needed" = xyes; then :
++ LD_AS_NEEDED=-Wl,--as-needed
++else
++ LD_AS_NEEDED=
++fi
++
++
++{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for __builtin_popcount" >&5
++$as_echo_n "checking for __builtin_popcount... " >&6; }
++if ${ac_cv_popcount+:} false; then :
++ $as_echo_n "(cached) " >&6
++else
++ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++/* end confdefs.h. */
++
++int
++main ()
++{
++exit (__builtin_popcount (127));
++ ;
++ return 0;
++}
++_ACEOF
++if ac_fn_c_try_link "$LINENO"; then :
++ ac_cv_popcount=yes
++else
++ ac_cv_popcount=no
++fi
++rm -f core conftest.err conftest.$ac_objext \
++ conftest$ac_exeext conftest.$ac_ext
++fi
++{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_popcount" >&5
++$as_echo "$ac_cv_popcount" >&6; }
++if test "x$ac_cv_popcount" = xyes; then :
++
++$as_echo "#define HAVE_BUILTIN_POPCOUNT 1" >>confdefs.h
++
++fi
++
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking for __thread support" >&5
+ $as_echo_n "checking for __thread support... " >&6; }
+ if ${ac_cv_tls+:} false; then :
+@@ -3926,7 +4056,13 @@ fi
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_tls" >&5
+ $as_echo "$ac_cv_tls" >&6; }
+ if test "x$ac_cv_tls" != xyes; then :
+- as_fn_error $? "__thread support required" "$LINENO" 5
++ if test "$use_locks" = yes; then :
++ as_fn_error $? "--enable-thread-safety requires __thread support" "$LINENO" 5
++else
++
++$as_echo "#define __thread /* empty: no multi-thread support */" >>confdefs.h
++
++fi
+ fi
+
+ # Check whether --enable-largefile was given.
+@@ -4275,6 +4411,22 @@ else
+ fi
+
+
++# Check whether --enable-werror was given.
++if test "${enable_werror+set}" = set; then :
++ enableval=$enable_werror; enable_werror=$enableval
++else
++ enable_werror=yes
++fi
++
++ if test "$enable_werror" = yes; then
++ BUILD_WERROR_TRUE=
++ BUILD_WERROR_FALSE='#'
++else
++ BUILD_WERROR_TRUE='#'
++ BUILD_WERROR_FALSE=
++fi
++
++
+ # Check whether --enable-tests-rpath was given.
+ if test "${enable_tests_rpath+set}" = set; then :
+ enableval=$enable_tests_rpath; tests_use_rpath=$enableval
+@@ -4995,7 +5147,7 @@ case "$eu_version" in
+ esac
+
+ # Round up to the next release API (x.y) version.
+-eu_version=$(( (eu_version + 999) / 1000 ))
++eu_version=`expr \( $eu_version + 999 \) / 1000`
+
+ cat >confcache <<\_ACEOF
+ # This file is a shell script that caches the results of configure
+@@ -5154,6 +5306,10 @@ if test -z "${BUILD_STATIC_TRUE}" && tes
+ as_fn_error $? "conditional \"BUILD_STATIC\" was never defined.
+ Usually this means the macro was only invoked conditionally." "$LINENO" 5
+ fi
++if test -z "${BUILD_WERROR_TRUE}" && test -z "${BUILD_WERROR_FALSE}"; then
++ as_fn_error $? "conditional \"BUILD_WERROR\" was never defined.
++Usually this means the macro was only invoked conditionally." "$LINENO" 5
++fi
+ if test -z "${TESTS_RPATH_TRUE}" && test -z "${TESTS_RPATH_FALSE}"; then
+ as_fn_error $? "conditional \"TESTS_RPATH\" was never defined.
+ Usually this means the macro was only invoked conditionally." "$LINENO" 5
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