mir,mir_2_15: Drop glog dependency

glog pkg-config file disappeared after NixOS#364543.

- mir doesn't depend on it anymore
- mir_2_15 did, and re-enabling the pkg-config file for the new glog version errored out

Upstream decided to just drop glog as a dependency, so follow suit.

pkgs/servers/mir/common.nix

@@ -12,7 +12,6 @@
   freetype,
   glib,
   glm,
-  glog,
   libapparmor,
   libdrm,
   libepoxy,
@@ -112,7 +111,6 @@ stdenv.mkDerivation (finalAttrs: {
     freetype
     glib
     glm
-    glog
     libdrm
     libepoxy
     libevdev

pkgs/servers/mir/default.nix

@@ -29,6 +29,14 @@ in
         hash = "sha256-k+51piPQandbHdm+ioqpBrb+C7Aqi2kugchAehZ1aiU=";
       })
 
+      # Always depend on epoxy
+      # Remove when version > 2.15.0
+      (fetchpatch {
+        name = "0003-mir-cmake-always-require-epoxy.patch";
+        url = "https://github.com/canonical/mir/commit/171c42ac3929f946a70505ee42be0ce8220f245a.patch";
+        hash = "sha256-QuVZBcHSn/DK+xbjM36Y89+w22vk7NRV4MkbjgvS28A=";
+      })
+
       # Fix ignored return value of std::lock_guard
       # Remove when version > 2.15.0
       # Was changed as part of the big platform API change, no individual upstream commit with this fix
@@ -44,6 +52,33 @@ in
       # Partially done in https://github.com/canonical/mir/pull/3192, though one of the calloc was fixed earlier
       # when some code was moved into that file
       ./1003-mir-2_15-calloc-args-in-right-order.patch
+
+      # Drop gflags & glog dependencies
+      # Remove when version > 2.16.4
+      (fetchpatch {
+        name = "0101-Drop-unused-dependency-on-gflags.patch";
+        url = "https://github.com/canonical/mir/commit/15a40638e5e9c4b6a11b7fa446ad31e190f485e7.patch";
+        includes = [
+          "CMakeLists.txt"
+          "examples/mir_demo_server/CMakeLists.txt"
+          "examples/mir_demo_server/glog_logger.cpp"
+        ];
+        hash = "sha256-qIsWCOs6Ap0jJ2cpgdO+xJHmSqC6zP+J3ALAfmlA6Vc=";
+      })
+      (fetchpatch {
+        name = "0102-Drop-the-glog-example.patch";
+        url = "https://github.com/canonical/mir/commit/8407da28ddb9a535df2775f224bf5143e8770d52.patch";
+        includes = [
+          "CMakeLists.txt"
+          "examples/mir_demo_server/CMakeLists.txt"
+          "examples/mir_demo_server/glog_logger.cpp"
+          "examples/mir_demo_server/glog_logger.h"
+          "examples/mir_demo_server/server_example.cpp"
+          "examples/mir_demo_server/server_example_log_options.cpp"
+          "examples/mir_demo_server/server_example_log_options.h"
+        ];
+        hash = "sha256-jVhVR7wZZZGRS40z+HPNoGBLHulvE1nHRKgYhQ6/g9M=";
+      })
     ];
   };
 }