[evince] Windows: fix compilation, CLOEXEC does not exist

[Germán Poo-Caamaño <gpoo src gnome org>]

commit dc631aa511c80e6dad3f4fee5c4cb66d65334c2f
Author: Vincent Torri <vincent torri gmail com>
Date:   Sun Dec 6 08:37:39 2020 +0100

    Windows: fix compilation, CLOEXEC does not exist

 libdocument/ev-file-helpers.c | 10 ++++++++++
 1 file changed, 10 insertions(+)
---
diff --git a/libdocument/ev-file-helpers.c b/libdocument/ev-file-helpers.c
index b0abb3a7..78c0374e 100644
--- a/libdocument/ev-file-helpers.c
+++ b/libdocument/ev-file-helpers.c
@@ -39,6 +39,11 @@ static gchar *tmp_dir = NULL;
 #define O_BINARY 0
 #endif
 
+/* On Windows, O_CLOEXEC does not exist */
+#ifndef O_CLOEXEC
+#define O_CLOEXEC 0
+#endif
+
 /*
  * ev_dir_ensure_exists:
  * @dir: the directory name
@@ -513,6 +518,10 @@ static const char *compressor_cmds[] = {
 static void
 compression_child_setup_cb (gpointer fd_ptr)
 {
+#ifdef _WIN32
+        /* On Windows, processes are not inherited by default */
+        (void)fd_ptr;
+#else
         int fd = GPOINTER_TO_INT (fd_ptr);
         int flags;
 
@@ -521,6 +530,7 @@ compression_child_setup_cb (gpointer fd_ptr)
                 flags &= ~FD_CLOEXEC;
                 fcntl (fd, F_SETFD, flags);
         }
+#endif
 }
 
 static gchar *