dnl as we need to know whether we need libm
dnl for math functions or not
dnl (see http://hackage.haskell.org/trac/ghc/ticket/3730)
-AC_SEARCH_LIBS(atan, m,
- [AC_DEFINE([HAVE_LIBM], [1], [Define to 1 if you need to link with libm])])
+AC_CHECK_LIB(m, atan, HaveLibM=YES, HaveLibM=NO)
+if test $HaveLibM = YES
+then
+ AC_DEFINE([HAVE_LIBM], [1], [Define to 1 if you need to link with libm])
+fi
dnl ** check whether this machine has BFD and liberty installed (used for debugging)
dnl the order of these tests matters: bfd needs liberty
[Define to 1 if we have printf$LDBLStub (Apple Mac OS >= 10.4, PPC).])
])
+dnl ** check for eventfd which is needed by the I/O manager
+AC_CHECK_HEADERS([sys/eventfd.h])
+AC_CHECK_FUNCS([eventfd])
+
# test for GTK+
AC_PATH_PROGS([GTK_CONFIG], [pkg-config])
if test -n "$GTK_CONFIG"; then