1 files changed, 1 insertions, 0 deletions

diff --git a/configure.ac b/configure.ac
index e636253..606e644 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,31 +1,32 @@
 AC_INIT([libopkele], [2.0.4], [libopkele-bugs@klever.net])
 AC_CONFIG_SRCDIR([include/opkele/opkele-config.h])
 AC_CONFIG_HEADERS([config.h include/opkele/acconfig.h])
 AC_CONFIG_MACRO_DIR([aclocal.d])
 AC_CONFIG_AUX_DIR([aux.d])
 AM_INIT_AUTOMAKE([dist-bzip2])
 
 AC_PROG_INSTALL
 AC_PROG_CXX
 AC_PROG_CC
 AC_PROG_LIBTOOL
 PKG_PROG_PKG_CONFIG
 
 AC_HEADER_STDC
 AC_CHECK_FUNCS([timegm])
+AC_CHECK_HEADERS([ext/algorithm.h])
 
 AC_PATH_PROG([XSLTPROC],[xsltproc],[true])
 
 AC_MSG_CHECKING([for source tree version])
 if headrev=$(cd $srcdir && git rev-parse --verify HEAD 2>/dev/null) ; then
  PACKAGE_SRC_VERSION="$(cd $srcdir && git describe --tags $headrev)"
  test "$PACKAGE_SRC_VERSION" = "$PACKAGE_VERSION" \
   -o "${PACKAGE_SRC_VERSION#${PACKAGE_VERSION}-}" != "$PACKAGE_SRC_VERSION" || PACKAGE_SRC_VERSION="${PACKAGE_VERSION}:${PACKAGE_SRC_VERSION}"
  ( cd $srcdir && git diff-index $headrev | read dirt ) && PACKAGE_SRC_VERSION="${PACKAGE_SRC_VERSION}-dirty"
 else
  PACKAGE_SRC_VERSION="$PACKAGE_VERSION"
 fi
 AC_MSG_RESULT([$PACKAGE_SRC_VERSION])
 AC_SUBST([PACKAGE_SRC_VERSION])
 AC_DEFINE_UNQUOTED([PACKAGE_SRC_VERSION],["$PACKAGE_SRC_VERSION"],[more or less precise source tree version])