Check for glu and udev in cmake

CMake/Modules/Findudev.cmake

@@ -0,0 +1,85 @@
+# - try to find the udev library
+#
+# Cache Variables: (probably not for direct use in your scripts)
+#  UDEV_INCLUDE_DIR
+#  UDEV_SOURCE_DIR
+#  UDEV_LIBRARY
+#
+# Non-cache variables you might use in your CMakeLists.txt:
+#  UDEV_FOUND
+#  UDEV_INCLUDE_DIRS
+#  UDEV_LIBRARIES
+#
+# Requires these CMake modules:
+#  FindPackageHandleStandardArgs (known included with CMake >=2.6.2)
+#
+# Original Authors:
+# 2014, Kevin M. Godby <kevin@godby.org>
+# 2021, Rylie Pavlik <rylie.pavlik@collabora.com> <rylie@ryliepavlik.com>
+#
+# Copyright 2014, Kevin M. Godby <kevin@godby.org>
+# Copyright 2021, Collabora, Ltd.
+#
+# SPDX-License-Identifier: BSL-1.0
+#
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or copy at
+# http://www.boost.org/LICENSE_1_0.txt)
+
+set(UDEV_ROOT_DIR
+    "${UDEV_ROOT_DIR}"
+	CACHE
+	PATH
+    "Directory to search for udev")
+
+if(NOT ANDROID)
+	find_package(PkgConfig QUIET)
+	if(PKG_CONFIG_FOUND)
+		pkg_check_modules(PC_LIBUDEV QUIET libudev)
+	endif()
+endif()
+
+find_library(UDEV_LIBRARY
+	NAMES
+	udev
+	PATHS
+	${PC_LIBUDEV_LIBRARY_DIRS}
+	${PC_LIBUDEV_LIBDIR}
+	HINTS
+	"${UDEV_ROOT_DIR}"
+	PATH_SUFFIXES
+	lib
+	)
+
+get_filename_component(_libdir "${UDEV_LIBRARY}" PATH)
+
+find_path(UDEV_INCLUDE_DIR
+	NAMES
+	libudev.h
+	PATHS
+	${PC_LIBUDEV_INCLUDE_DIRS}
+	${PC_LIBUDEV_INCLUDEDIR}
+	HINTS
+	"${_libdir}"
+	"${_libdir}/.."
+	"${UDEV_ROOT_DIR}"
+	PATH_SUFFIXES
+	include
+	)
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(udev
+	DEFAULT_MSG
+	UDEV_LIBRARY
+	UDEV_INCLUDE_DIR
+	)
+
+if(UDEV_FOUND)
+	list(APPEND UDEV_LIBRARIES ${UDEV_LIBRARY})
+	list(APPEND UDEV_INCLUDE_DIRS ${UDEV_INCLUDE_DIR})
+	mark_as_advanced(UDEV_ROOT_DIR)
+endif()
+
+mark_as_advanced(UDEV_INCLUDE_DIR
+	UDEV_LIBRARY)
+

StepmaniaCore.cmake

@@ -338,6 +338,11 @@ elseif(LINUX OR BSD)
 
   set(OpenGL_GL_PREFERENCE GLVND)
   find_package(OpenGL REQUIRED)
+  if (NOT OPENGL_GLU_FOUND)  # it's an optional component of OpenGL, but we use it for glew build
+    message(FATAL_ERROR "libglu was not found")
+  endif()
+
+  find_package(udev REQUIRED)
 endif(WIN32) # LINUX OR BSD, APPLE
 
 configure_file("${SM_SRC_DIR}/config.in.hpp"