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745b56f58c
No need to explain this over and over again. While at it, do some other minor cleanups to whitespace and comments (i.e. delete them).
99 lines
3.5 KiB
CMake
99 lines
3.5 KiB
CMake
# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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# file Copyright.txt or https://cmake.org/licensing for details.
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#.rst:
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# FindOpenAL
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# ----------
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#
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#
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#
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# Locate OpenAL This module defines OPENAL_LIBRARY OPENAL_FOUND, if
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# false, do not try to link to OpenAL OPENAL_INCLUDE_DIR, where to find
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# the headers
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#
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# $OPENALDIR is an environment variable that would correspond to the
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# ./configure --prefix=$OPENALDIR used in building OpenAL.
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#
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# Created by Eric Wing. This was influenced by the FindSDL.cmake
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# module.
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# This makes the presumption that you are include al.h like
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# #include "al.h"
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# and not
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# #include <AL/al.h>
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# The reason for this is that the latter is not entirely portable.
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# Windows/Creative Labs does not by default put their headers in AL/ and
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# OS X uses the convention <OpenAL/al.h>.
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#
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# For Windows, Creative Labs seems to have added a registry key for their
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# OpenAL 1.1 installer. I have added that key to the list of search paths,
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# however, the key looks like it could be a little fragile depending on
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# if they decide to change the 1.00.0000 number for bug fix releases.
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# Also, they seem to have laid down groundwork for multiple library platforms
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# which puts the library in an extra subdirectory. Currently there is only
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# Win32 and I have hardcoded that here. This may need to be adjusted as
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# platforms are introduced.
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# The OpenAL 1.0 installer doesn't seem to have a useful key I can use.
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# I do not know if the Nvidia OpenAL SDK has a registry key.
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#
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# For OS X, remember that OpenAL was added by Apple in 10.4 (Tiger).
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# To support the framework, I originally wrote special framework detection
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# code in this module which I have now removed with CMake's introduction
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# of native support for frameworks.
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# In addition, OpenAL is open source, and it is possible to compile on Panther.
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# Furthermore, due to bugs in the initial OpenAL release, and the
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# transition to OpenAL 1.1, it is common to need to override the built-in
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# framework.
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# Per my request, CMake should search for frameworks first in
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# the following order:
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# ~/Library/Frameworks/OpenAL.framework/Headers
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# /Library/Frameworks/OpenAL.framework/Headers
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# /System/Library/Frameworks/OpenAL.framework/Headers
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#
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# On OS X, this will prefer the Framework version (if found) over others.
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# People will have to manually change the cache values of
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# OPENAL_LIBRARY to override this selection or set the CMake environment
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# CMAKE_INCLUDE_PATH to modify the search paths.
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find_path(OPENAL_INCLUDE_DIR al.h
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HINTS
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ENV OPENALDIR
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PATH_SUFFIXES include/AL include/OpenAL include
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PATHS
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~/Library/Frameworks
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/Library/Frameworks
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/sw # Fink
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/opt/local # DarwinPorts
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/opt/csw # Blastwave
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/opt
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[HKEY_LOCAL_MACHINE\\SOFTWARE\\Creative\ Labs\\OpenAL\ 1.1\ Software\ Development\ Kit\\1.00.0000;InstallDir]
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)
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if(CMAKE_SIZEOF_VOID_P EQUAL 8)
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set(_OpenAL_ARCH_DIR libs/Win64)
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else()
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set(_OpenAL_ARCH_DIR libs/Win32)
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endif()
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find_library(OPENAL_LIBRARY
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NAMES OpenAL al openal OpenAL32
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HINTS
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ENV OPENALDIR
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PATH_SUFFIXES lib64 lib libs64 libs ${_OpenAL_ARCH_DIR}
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PATHS
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~/Library/Frameworks
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/Library/Frameworks
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/sw
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/opt/local
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/opt/csw
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/opt
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[HKEY_LOCAL_MACHINE\\SOFTWARE\\Creative\ Labs\\OpenAL\ 1.1\ Software\ Development\ Kit\\1.00.0000;InstallDir]
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)
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unset(_OpenAL_ARCH_DIR)
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include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
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FIND_PACKAGE_HANDLE_STANDARD_ARGS(OpenAL DEFAULT_MSG OPENAL_LIBRARY OPENAL_INCLUDE_DIR)
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mark_as_advanced(OPENAL_LIBRARY OPENAL_INCLUDE_DIR)
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