Adopting glm

I'd like to adopt glm, please see #963901. Here are my changes, I'm open to any feedback :)

debian/patches/00-tests-no-ipa-modref.patch

 Description: Fix FTBFS (unit-tests) with GCC-11
-Author: Lukas Märdian <slyon@ubuntu.com>
-Origin: vendor, Ubuntu
+ Instead of fully disabling compiler optimizations, this patch only
+ disables the problematic optimization, so that if new compiler versions
+ introduce new incompatible optimizations it will be easy to spot them and
+ report them upstream.
 Bug: https://github.com/g-truc/glm/pull/1087
 Bug-Ubuntu: https://bugs.launchpad.net/ubuntu/+source/glm/+bug/1946750
-Bug-Debian: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=996241
-Forwarded: https://github.com/g-truc/glm/pull/1087
-Last-Update: 2021-10-12
-
+Bug-Debian: https://bugs.debian.org/996241
+Forwarded: https://github.com/g-truc/glm/pull/1087#issuecomment-942299144
+Author: Andrea Pappacoda <andrea@pappacoda.it>
+Last-Update: 2022-01-23
 --- glm.orig/test/CMakeLists.txt
 +++ glm/test/CMakeLists.txt
 @@ -206,7 +206,7 @@ elseif(CMAKE_CXX_COMPILER_ID MATCHES "GN
@@ -14,7 +16,7 @@ Last-Update: 2021-10-12
  	endif()
  
 -	add_compile_options(-O2)
-+	add_compile_options(-O0)
++	add_compile_options(-O2 -fno-ipa-modref)
  	add_compile_options(-Wno-long-long)
  
  elseif(CMAKE_CXX_COMPILER_ID MATCHES "Intel")