cogl/path: Don't depend on GL/glu.h

It's not needed for anything, and we can get rid of the dependency we
just added.

Also remove the installation step from Dockerfile.

.gitlab-ci/Dockerfile

@@ -5,7 +5,7 @@ RUN dnf -y update && dnf -y upgrade && \
     dnf builddep -y mutter && \
 
     # Until Fedora catches up with meson build-deps
-    dnf install -y meson xorg-x11-server-Xorg gnome-settings-daemon-devel egl-wayland-devel xorg-x11-server-Xwayland mesa-libGLU-devel && \
+    dnf install -y meson xorg-x11-server-Xorg gnome-settings-daemon-devel egl-wayland-devel xorg-x11-server-Xwayland && \
 
     # For running unit tests
     dnf install -y xorg-x11-server-Xvfb mesa-dri-drivers dbus dbus-x11 && \

cogl/cogl-path/meson.build

@@ -50,7 +50,6 @@ cogl_path_sources += libmutter_cogl_path_enum_types
 
 cogl_path_c_args = [
   cogl_c_args,
-  '-I@0@'.format(glu_dep.get_pkgconfig_variable('includedir')),
 ]
 
 libmutter_cogl_path = shared_library('mutter-cogl-path-' + libmutter_api_version,

cogl/cogl-path/tesselator/mesh.h

@@ -35,7 +35,7 @@
 #ifndef __mesh_h_
 #define __mesh_h_
 
-#include <GL/glu.h>
+#include <GL/gl.h>
 
 typedef struct GLUmesh GLUmesh; 
 

cogl/cogl-path/tesselator/normal.h

@@ -36,6 +36,7 @@
 #define __normal_h_
 
 #include "tess.h"
+#include "tesselator.h"
 
 /* __gl_projectPolygon( tess ) determines the polygon normal
  * and project vertices onto the plane of the polygon.

cogl/cogl-path/tesselator/render.h

@@ -36,6 +36,7 @@
 #define __render_h_
 
 #include "mesh.h"
+#include "tesselator.h"
 
 /* __gl_renderMesh( tess, mesh ) takes a mesh and breaks it into triangle
  * fans, strips, and separate triangles.  A substantial effort is made

cogl/cogl-path/tesselator/sweep.h

@@ -36,6 +36,7 @@
 #define __sweep_h_
 
 #include "mesh.h"
+#include "tesselator.h"
 
 /* __gl_computeInterior( tess ) computes the planar arrangement specified
  * by the given contours, and further subdivides this arrangement

cogl/cogl-path/tesselator/tess.h

@@ -35,7 +35,6 @@
 #ifndef __tess_h_
 #define __tess_h_
 
-#include <GL/glu.h>
 #include <setjmp.h>
 #include "mesh.h"
 #include "dict.h"

meson.build

@@ -120,7 +120,6 @@ xinerama_dep = dependency('xinerama')
 ice_dep = dependency('ice')
 atk_dep = dependency('atk', version: atk_req)
 libcanberra_dep = dependency('libcanberra', version: libcanberra_req)
-glu_dep = dependency('glu')
 
 # For now always require X11 support
 have_x11 = true