+BOOST_VERSION
+]])])
+ BOOST_GOT_VERSION=`(eval "$ac_cpp conftest.$ac_ext") 2>&AS_MESSAGE_LOG_FD | grep -v '#' | grep -v '^$' 2>/dev/null`
+ if test -z "$BOOST_GOT_VERSION" -o \
+ "$BOOST_GOT_VERSION" = "BOOST_VERSION"; then
+ AC_MSG_RESULT([no])
+ AC_MSG_ERROR([Boost development libraries required])
+ fi
+ AC_MSG_RESULT([yes ($BOOST_GOT_VERSION)])
+ if test "$BOOST_GOT_VERSION" -lt $BOOST_REQ_VERSION; then
+ AC_MSG_ERROR([Boost version $BOOST_REQ_VERSION required])
+ fi
+ for c in $1; do
+ case $c in
+ system)
+ AC_SUBST([BOOST_SYSTEM_LIB])
+ BOOST_SYSTEM_LIB=""
+ if test "$BOOST_GOT_VERSION" -ge 104100; then
+ AC_MSG_CHECKING([Boost system])
+ saveLIBS="${LIBS}"
+ for l in "${BOOST_TOOLSET}" "${BOOST_TOOLSET}-mt"; do
+ trylib="-lboost_system${l}"
+ LIBS="${saveLIBS} ${trylib}"
+ AC_LINK_IFELSE([AC_LANG_PROGRAM([[
+#include <boost/version.hpp>
+#include <boost/system/error_code.hpp>