[vte] build: Fix build with kernel headers from linux < 4.13

[Christian Persch <chpe src gnome org>]

commit 91123bb5201156e3d3adbe24305488f5eea2c8d7
Author: Christian Persch <chpe src gnome org>
Date:   Mon Sep 27 22:46:47 2021 +0200

    build: Fix build with kernel headers from linux < 4.13
    
    We already support running with a kernel that doesn't support this
    ioctl, so let's also support building with one. Add the missing
    ioctl definition to missing.hh.
    
    Fixes: https://gitlab.gnome.org/GNOME/vte/-/issues/2514

 src/missing.hh | 12 ++++++++++++
 1 file changed, 12 insertions(+)
---
diff --git a/src/missing.hh b/src/missing.hh
index e5a58727..7902e41e 100644
--- a/src/missing.hh
+++ b/src/missing.hh
@@ -23,11 +23,14 @@
 #include <fcntl.h>
 
 #ifdef __linux__
+
+#include <sys/ioctl.h>
 #include <sys/syscall.h>
 
 #if defined(__mips__) || defined(__mips64__)
 #include <asm/sgidefs.h>
 #endif
+
 #endif
 
 /* NSIG isn't in POSIX, so if it doesn't exist use this here. See bug #759196 */
@@ -128,4 +131,13 @@ char* strchrnul(char const* s,
 #define CLOSE_RANGE_CLOEXEC (1u << 2)
 #endif
 
+#if !defined(TIOCGPTPEER)
+/* See linux commit 54ebbfb1603415d9953c150535850d30609ef077 */
+#if defined(__sparc__)
+#define TIOCGPTPEER _IOR('t', 137, int)
+#else
+#define TIOCGPTPEER _IOR('T', 0x41, int)
+#endif
+#endif /* !TIOCGPTPEER */
+
 #endif /* __linux__ */