osutil: disable compilation of recvfds() on unsupported platforms
It appears that Solaris doesn't provide CMSG_LEN(), msg_control, etc. As
recvfds() is only necessary for chg, this patch just drops it if CMSG_LEN
isn't defined, which is the same workaround as Python 3.x.
https://hg.python.org/cpython/rev/c64216addd7f#l7.33
--- a/mercurial/osutil.c Wed Feb 03 10:57:27 2016 -0200
+++ b/mercurial/osutil.c Tue Feb 02 20:56:48 2016 +0900
@@ -653,7 +653,11 @@
/*
* recvfds() simply does not release GIL during blocking io operation because
* command server is known to be single-threaded.
+ *
+ * Old systems such as Solaris don't provide CMSG_LEN, msg_control, etc.
+ * Currently, recvfds() is not supported on these platforms.
*/
+#ifdef CMSG_LEN
static ssize_t recvfdstobuf(int sockfd, int **rfds, void *cbuf, size_t cbufsize)
{
@@ -713,6 +717,7 @@
return NULL;
}
+#endif /* CMSG_LEN */
#endif /* ndef _WIN32 */
static PyObject *listdir(PyObject *self, PyObject *args, PyObject *kwargs)
@@ -881,9 +886,11 @@
{"statfiles", (PyCFunction)statfiles, METH_VARARGS | METH_KEYWORDS,
"stat a series of files or symlinks\n"
"Returns None for non-existent entries and entries of other types.\n"},
+#ifdef CMSG_LEN
{"recvfds", (PyCFunction)recvfds, METH_VARARGS,
"receive list of file descriptors via socket\n"},
#endif
+#endif
#ifdef __APPLE__
{
"isgui", (PyCFunction)isgui, METH_NOARGS,