build: link avrt for OpenAL on WIN32

For static builds for Windows, link `avrt`, a system library that is now
required by OpenAL.

Also remove our version of `FindOpenAL.cmake` in favor of the
system-provided version.

Signed-off-by: Rafael Kitover <rkitover@gmail.com>

cmake/FindOpenAL.cmake

@@ -1,110 +0,0 @@
-#.rst:
-# FindOpenAL
-# ----------
-#
-#
-#
-# Locate OpenAL This module defines OPENAL_LIBRARY OPENAL_FOUND, if
-# false, do not try to link to OpenAL OPENAL_INCLUDE_DIR, where to find
-# the headers
-#
-# $OPENALDIR is an environment variable that would correspond to the
-# ./configure --prefix=$OPENALDIR used in building OpenAL.
-#
-# Created by Eric Wing.  This was influenced by the FindSDL.cmake
-# module.
-
-#=============================================================================
-# Copyright 2005-2009 Kitware, Inc.
-#
-# Distributed under the OSI-approved BSD License (the "License");
-# see accompanying file Copyright.txt for details.
-#
-# This software is distributed WITHOUT ANY WARRANTY; without even the
-# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
-# See the License for more information.
-#=============================================================================
-# (To distribute this file outside of CMake, substitute the full
-#  License text for the above reference.)
-
-# This makes the presumption that you are include al.h like
-# #include "al.h"
-# and not
-# #include <AL/al.h>
-# The reason for this is that the latter is not entirely portable.
-# Windows/Creative Labs does not by default put their headers in AL/ and
-# OS X uses the convention <OpenAL/al.h>.
-#
-# For Windows, Creative Labs seems to have added a registry key for their
-# OpenAL 1.1 installer. I have added that key to the list of search paths,
-# however, the key looks like it could be a little fragile depending on
-# if they decide to change the 1.00.0000 number for bug fix releases.
-# Also, they seem to have laid down groundwork for multiple library platforms
-# which puts the library in an extra subdirectory. Currently there is only
-# Win32 and I have hardcoded that here. This may need to be adjusted as
-# platforms are introduced.
-# The OpenAL 1.0 installer doesn't seem to have a useful key I can use.
-# I do not know if the Nvidia OpenAL SDK has a registry key.
-#
-# For OS X, remember that OpenAL was added by Apple in 10.4 (Tiger).
-# To support the framework, I originally wrote special framework detection
-# code in this module which I have now removed with CMake's introduction
-# of native support for frameworks.
-# In addition, OpenAL is open source, and it is possible to compile on Panther.
-# Furthermore, due to bugs in the initial OpenAL release, and the
-# transition to OpenAL 1.1, it is common to need to override the built-in
-# framework.
-# Per my request, CMake should search for frameworks first in
-# the following order:
-# ~/Library/Frameworks/OpenAL.framework/Headers
-# /Library/Frameworks/OpenAL.framework/Headers
-# /System/Library/Frameworks/OpenAL.framework/Headers
-#
-# On OS X, this will prefer the Framework version (if found) over others.
-# People will have to manually change the cache values of
-# OPENAL_LIBRARY to override this selection or set the CMake environment
-# CMAKE_INCLUDE_PATH to modify the search paths.
-
-find_path(OPENAL_INCLUDE_DIR al.h
-  HINTS
-    ENV OPENALDIR
-  PATH_SUFFIXES AL OpenAL
-  PATHS
-  ~/Library/Frameworks
-  /Library/Frameworks
-  /sw # Fink
-  /opt/local # DarwinPorts
-  /opt/csw # Blastwave
-  /opt
-  [HKEY_LOCAL_MACHINE\\SOFTWARE\\Creative\ Labs\\OpenAL\ 1.1\ Software\ Development\ Kit\\1.00.0000;InstallDir]
-)
-
-if(CMAKE_SIZEOF_VOID_P EQUAL 8)
-  set(_OpenAL_ARCH_DIR libs/Win64)
-else()
-  set(_OpenAL_ARCH_DIR libs/Win32)
-endif()
-
-find_library(OPENAL_LIBRARY
-  NAMES OpenAL al openal OpenAL32
-  HINTS
-    ENV OPENALDIR
-  PATH_SUFFIXES lib64 lib libs64 libs ${_OpenAL_ARCH_DIR}
-  PATHS
-  ~/Library/Frameworks
-  /Library/Frameworks
-  /sw
-  /opt/local
-  /opt/csw
-  /opt
-  [HKEY_LOCAL_MACHINE\\SOFTWARE\\Creative\ Labs\\OpenAL\ 1.1\ Software\ Development\ Kit\\1.00.0000;InstallDir]
-)
-
-unset(_OpenAL_ARCH_DIR)
-
-# handle the QUIETLY and REQUIRED arguments and set OPENAL_FOUND to TRUE if
-# all listed variables are TRUE
-include(FindPackageHandleStandardArgs)
-FIND_PACKAGE_HANDLE_STANDARD_ARGS(OpenAL  DEFAULT_MSG  OPENAL_LIBRARY OPENAL_INCLUDE_DIR)
-
-mark_as_advanced(OPENAL_LIBRARY OPENAL_INCLUDE_DIR)

src/wx/CMakeLists.txt

@@ -255,6 +255,10 @@ function(configure_wx_target target)
     # OpenAL.
     if(OPENAL_STATIC)
         _add_compile_definitions(AL_LIBTYPE_STATIC)
+
+        if(WIN32)
+            list(APPEND OPENAL_LIBRARY avrt)
+        endif()
     endif()
     _add_include_directories(${OPENAL_INCLUDE_DIR})
     _add_link_libraries(${OPENAL_LIBRARY})