From: Jan Engelhardt <jengelh@inai.de>
Date: 2023-10-30 12:10:03.273303565 +0100

glslang 13 needs C++17.

---
 configure               |    2 +-
 libavfilter/glslang.cpp |    1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

Index: ffmpeg-4.4.4/configure
===================================================================
--- ffmpeg-4.4.4.orig/configure
+++ ffmpeg-4.4.4/configure
@@ -5267,7 +5267,7 @@ fi
 
 add_cppflags -D_ISOC99_SOURCE
 add_cxxflags -D__STDC_CONSTANT_MACROS
-check_cxxflags -std=c++11 || check_cxxflags -std=c++0x
+check_cxxflags -std=c++17
 
 # some compilers silently accept -std=c11, so we also need to check that the
 # version macro is defined properly
Index: ffmpeg-4.4.4/libavfilter/glslang.cpp
===================================================================
--- ffmpeg-4.4.4.orig/libavfilter/glslang.cpp
+++ ffmpeg-4.4.4/libavfilter/glslang.cpp
@@ -16,6 +16,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#include <cassert>
 #include <pthread.h>
 
 extern "C" {