From f9c21b1cb3ecff7105be716954748cc91bd7aff6 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Sat, 4 Nov 2017 12:23:52 +0530
Subject: [PATCH] Sigh, legacy linux distros

---
 kitty/fonts.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/kitty/fonts.c b/kitty/fonts.c
index fc7b53c11..21e029d02 100644
--- a/kitty/fonts.c
+++ b/kitty/fonts.c
@@ -8,6 +8,10 @@
 #include "fonts.h"
 #include "state.h"
 
+#if HB_VERSION_MAJOR > 0 || (HB_VERSION_MAJOR == 0 && (HB_VERSION_MINOR > 9 || (HB_VERSION_MINOR == 9 && HB_VERSION_MICRO >= 42)))
+#define HARBUZZ_HAS_SET_CLUSTER_LEVEL
+#endif
+
 #define MISSING_GLYPH 4
 
 typedef uint16_t glyph_index;
@@ -671,7 +675,9 @@ init_fonts(PyObject *module) {
     }
     harfbuzz_buffer = hb_buffer_create();
     if (harfbuzz_buffer == NULL || !hb_buffer_allocation_successful(harfbuzz_buffer) || !hb_buffer_pre_allocate(harfbuzz_buffer, 2048)) { PyErr_NoMemory(); return false; }
+#ifdef HARBUZZ_HAS_SET_CLUSTER_LEVEL
     hb_buffer_set_cluster_level(harfbuzz_buffer, HB_BUFFER_CLUSTER_LEVEL_MONOTONE_CHARACTERS);
+#endif
     if (PyModule_AddFunctions(module, module_methods) != 0) return false;
     current_send_sprite_to_gpu = send_sprite_to_gpu;
     return true;