linux-user: add eventfd support
Straightforward implementation. This syscall is rare enough that we
don't need to support the odder cases, just disable it if host glibc
is too old.
Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
diff --git a/configure b/configure
index 5c1065f..56dd489 100755
--- a/configure
+++ b/configure
@@ -1322,6 +1322,21 @@
splice=yes
fi
+# check if eventfd is supported
+eventfd=no
+cat > $TMPC << EOF
+#include <sys/eventfd.h>
+
+int main(void)
+{
+ int efd = eventfd(0, 0);
+ return 0;
+}
+EOF
+if compile_prog "" "" ; then
+ eventfd=yes
+fi
+
# Check if tools are available to build documentation.
if test "$build_docs" = "yes" -a \( ! -x "`which texi2html 2>/dev/null`" -o ! -x "`which pod2man 2>/dev/null`" \) ; then
build_docs="no"
@@ -1659,6 +1674,9 @@
if test "$splice" = "yes" ; then
echo "CONFIG_SPLICE=y" >> $config_host_mak
fi
+if test "$eventfd" = "yes" ; then
+ echo "CONFIG_EVENTFD=y" >> $config_host_mak
+fi
if test "$inotify" = "yes" ; then
echo "CONFIG_INOTIFY=y" >> $config_host_mak
fi
