Bug#888931: forge FTBFS with libglm-dev 0.9.9~a2-1

[Adrian Bunk]

Source: forge
Version: 0.9.2-2
Severity: serious
Tags: buster sid experimental

https://tests.reproducible-builds.org/debian/rb-pkg/unstable/amd64/forge.html

...
In file included from /usr/include/glm/gtx/string_cast.hpp:23:0,
                 from /build/1st/forge-0.9.2/src/backend/opengl/common.hpp:21,
                 from /build/1st/forge-0.9.2/src/backend/opengl/backend.hpp:12,
                 from /build/1st/forge-0.9.2/src/backend/window.hpp:12,
                 from /build/1st/forge-0.9.2/src/backend/handle.hpp:14,
                 from /build/1st/forge-0.9.2/src/api/c/font.cpp:12:
/usr/include/glm/gtx/dual_quaternion.hpp:24:3: error: #error "GLM: GLM_GTX_dual_quaternion is an experimental extension and may change in the future. Use #define GLM_ENABLE_EXPERIMENTAL before including it, if you really want to use it."
 # error "GLM: GLM_GTX_dual_quaternion is an experimental extension and may change in the future. Use #define GLM_ENABLE_EXPERIMENTAL before including it, if you really want to use it."
   ^~~~~