+AC_ARG_WITH(sysroot,
+[ --with-sysroot[=DIR] Search for usr/lib et al within DIR.],
+[
+ case ${with_sysroot} in
+ yes) TARGET_SYSTEM_ROOT='${exec_prefix}/${target_alias}/sys-root' ;;
+ *) TARGET_SYSTEM_ROOT=$with_sysroot ;;
+ esac
+
+ TARGET_SYSTEM_ROOT_DEFINE='-DTARGET_SYSTEM_ROOT=\"$(TARGET_SYSTEM_ROOT)\"'
+ use_sysroot=yes
+
+ if test "x$exec_prefix" = xNONE; then
+ if test "x$prefix" = xNONE; then
+ test_prefix=/usr/local
+ else
+ test_prefix=$prefix
+ fi
+ else
+ test_prefix=$exec_prefix
+ fi
+ case ${TARGET_SYSTEM_ROOT} in
+ "${test_prefix}"|"${test_prefix}/"*|\
+ '${exec_prefix}'|'${exec_prefix}/'*)
+ t="$TARGET_SYSTEM_ROOT_DEFINE -DTARGET_SYSTEM_ROOT_RELOCATABLE"
+ TARGET_SYSTEM_ROOT_DEFINE="$t"
+ ;;
+ esac
+], [
+ use_sysroot=no
+ TARGET_SYSTEM_ROOT=
+ TARGET_SYSTEM_ROOT_DEFINE='-DTARGET_SYSTEM_ROOT=\"\"'
+])
+AC_SUBST(use_sysroot)
+AC_SUBST(TARGET_SYSTEM_ROOT)
+AC_SUBST(TARGET_SYSTEM_ROOT_DEFINE)
+
+dnl FIXME: The following is bfd/warning.m4 contents expanded
+dnl When converting to current autotools, please replace with
+dnl AM_BINUTILS_WARNINGS
+WARN_CFLAGS="-W -Wall -Wstrict-prototypes -Wmissing-prototypes"
+
+AC_ARG_ENABLE(werror,
+ [ --enable-werror treat compile warnings as errors],
+ [case "${enableval}" in
+ yes | y) ERROR_ON_WARNING="yes" ;;
+ no | n) ERROR_ON_WARNING="no" ;;
+ *) AC_MSG_ERROR(bad value ${enableval} for --enable-werror) ;;
+ esac])
+
+# Enable -Werror by default when using gcc
+if test "${GCC}" = yes -a -z "${ERROR_ON_WARNING}" ; then
+ ERROR_ON_WARNING=yes
+fi
+
+NO_WERROR=
+if test "${ERROR_ON_WARNING}" = yes ; then
+ WARN_CFLAGS="$WARN_CFLAGS -Werror"
+ NO_WERROR="-Wno-error"
+fi
+
+AC_ARG_ENABLE(build-warnings,
+[ --enable-build-warnings Enable build-time compiler warnings],
+[case "${enableval}" in
+ yes) ;;
+ no) WARN_CFLAGS="-w";;
+ ,*) t=`echo "${enableval}" | sed -e "s/,/ /g"`
+ WARN_CFLAGS="${WARN_CFLAGS} ${t}";;
+ *,) t=`echo "${enableval}" | sed -e "s/,/ /g"`
+ WARN_CFLAGS="${t} ${WARN_CFLAGS}";;
+ *) WARN_CFLAGS=`echo "${enableval}" | sed -e "s/,/ /g"`;;
+esac])
+
+if test x"$silent" != x"yes" && test x"$WARN_CFLAGS" != x""; then
+ echo "Setting warning flags = $WARN_CFLAGS" 6>&1
+fi
+
+AC_SUBST(WARN_CFLAGS)
+AC_SUBST(NO_WERROR)
+