X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=configure.ac;h=3d05a0f33a91359a63107b9d167061328a62c206;hb=db286afd553884c362399042d00ee08656adafce;hp=f2773672896f209c4af41e8cc45e66eb8d0861c8;hpb=13346da217137e4efb6cf14657960c75a23251ad;p=ghc-hetmet.git

diff --git a/configure.ac b/configure.ac
index f277367..3d05a0f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -780,8 +780,11 @@ dnl    Keep that check as early as possible.
 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
@@ -875,6 +878,10 @@ AC_TRY_LINK_FUNC(printf\$LDBLStub,
             [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