small bugfix

[flightgear.git] / configure.ac

diff --git a/configure.ac b/configure.ac
index 5dfde3649c48719c138be3ff2b85a733eaa4fcdd..1af45ab9dfaaf21fb7e4d0f00563af965320aa6f 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -199,6 +199,7 @@ dnl check for some default libraries
 AC_SEARCH_LIBS(sqrt, [am ffm fm fastm m])
 AC_SEARCH_LIBS(ceil, m)
 AC_SEARCH_LIBS(dlclose, dl)
+AC_SEARCH_LIBS(clock_gettime, rt)
 
 base_LIBS="$LIBS"
 
@@ -624,6 +625,13 @@ fi
 LIBS=$save_LIBS
 CPPFLAGS=$save_CPPFLAGS
 
+AC_MSG_CHECKING([for feenableexcept])
+AC_LINK_IFELSE([AC_LANG_PROGRAM([[#define _GNU_SOURCE
+#include <fenv.h>]], [[feenableexcept(FE_DIVBYZERO)]])],
+[AC_DEFINE([HAVE_FEENABLEEXCEPT], 1, [define if system has fenableexcept])],
+AC_MSG_RESULT([yes]),
+AC_MSG_RESULT([no]))
+
 dnl Checks for header files.
 AC_HEADER_STDC
 AC_CHECK_HEADERS( \
@@ -721,6 +729,7 @@ AC_CONFIG_FILES([ \
        utils/propmerge/Makefile \
        utils/TerraSync/Makefile \
        utils/xmlgrep/Makefile \
+       utils/fgviewer/Makefile \
 ])
 AC_OUTPUT