cext: define S_IFLNK on Python 2.7 and Windows
Before this change, building on Python 2.7 on Windows fails due to
S_IFLNK being undefined. This regression was introduced by
a32a96079e2d / D11518.
It worked on Python 3 because its pyport.h (which is included via
Python.h) contains effectively the same code as added by this
changeset.
Differential Revision: https://phab.mercurial-scm.org/D11763
--- a/mercurial/cext/parsers.c Mon Nov 15 12:03:28 2021 +0100
+++ b/mercurial/cext/parsers.c Mon Nov 15 19:53:01 2021 -0800
@@ -25,6 +25,12 @@
#define PyInt_FromLong PyLong_FromLong
#define PyInt_FromSsize_t PyLong_FromSsize_t
#define PyInt_AsLong PyLong_AsLong
+#else
+/* Windows on Python 2.7 doesn't define S_IFLNK. Python 3+ defines via
+ * pyport.h. */
+#ifndef S_IFLNK
+#define S_IFLNK 0120000
+#endif
#endif
static const char *const versionerrortext = "Python minor version mismatch";