build: Check that mlockall() exists
Instead of assuming that all POSIX platforms provide mlockall(),
test for it in configure. If the host doesn't provide this platform
then os_mlock() will fail -ENOSYS, as it does already on Windows.
This is necessary for Haiku, which does not have mlockall().
Signed-off-by: David Carlier <devnexen@gmail.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20200703145614.16684-4-peter.maydell@linaro.org
[PMM: Expanded commit message; rename to HAVE_MLOCKALL]
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
diff --git a/configure b/configure
index 9785056..429c938 100755
--- a/configure
+++ b/configure
@@ -2408,6 +2408,18 @@
pty_h=no
fi
+cat > $TMPC <<EOF
+#include <sys/mman.h>
+int main(int argc, char *argv[]) {
+ return mlockall(MCL_FUTURE);
+}
+EOF
+if compile_prog "" "" ; then
+ have_mlockall=yes
+else
+ have_mlockall=no
+fi
+
#########################################
# vhost interdependencies and host support
@@ -7902,6 +7914,9 @@
if test "$pty_h" = "yes" ; then
echo "HAVE_PTY_H=y" >> $config_host_mak
fi
+if test "$have_mlockall" = "yes" ; then
+ echo "HAVE_MLOCKALL=y" >> $config_host_mak
+fi
if test "$fuzzing" = "yes" ; then
if test "$have_fuzzer" = "yes"; then
FUZZ_LDFLAGS=" -fsanitize=address,fuzzer"
