X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=configure.in;h=36e28c8e6da86d4484208187b9a51c8dfa2b8c17;hb=a5b47be19ba3a736aa60728dba43a14cd0cbe5a4;hp=64c942cbb34c387271664496caf6dd071a7806a6;hpb=c1a8892080e9bd9b6fecd69999e4e487b53e81b9;p=ghc-hetmet.git

diff --git a/configure.in b/configure.in
index 64c942c..36e28c8 100644
--- a/configure.in
+++ b/configure.in
@@ -1109,6 +1109,24 @@ AC_SUBST(HaveRtldNow)
 
 FPTOOLS_CHECK_LIB_NOWARN(m, atan)
 
+dnl ---------- usleep ----------
+dnl --- stolen from guile configure ---
+dnl --- FIXME: /usr/include/unistd.h can't be right?
+
+### On some systems usleep has no return value.  If it does have one,
+### we'd like to return it; otherwise, we'll fake it.
+AC_CACHE_CHECK([return type of usleep], cv_func_usleep_return_type,
+  [AC_EGREP_HEADER(changequote(<, >)<void[      ]+usleep>changequote([, ]),
+                   /usr/include/unistd.h,
+                   [cv_func_usleep_return_type=void],
+                   [cv_func_usleep_return_type=int])])
+case "$cv_func_usleep_return_type" in
+  "void" )
+    AC_DEFINE(USLEEP_RETURNS_VOID, 1,
+      [Define if the system headers declare usleep to return void.])
+  ;;
+esac
+
 dnl --------------------------------------------------
 dnl * test for GTK+
 dnl --------------------------------------------------