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37 lines
1.4 KiB
37 lines
1.4 KiB
# 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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# This file is included by cmGlobalGenerator::EnableLanguage.
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# It is included before the compiler has been determined.
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# before cmake 2.6 these variables were set in cmMakefile.cxx. This is still
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# done to keep scripts and custom language and compiler modules working.
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# But they are reset here and set again in the platform files for the target
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# platform, so they can be used for testing the target platform instead
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# of testing the host platform.
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unset(APPLE)
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unset(UNIX)
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unset(CYGWIN)
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unset(MSYS)
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unset(WIN32)
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unset(BSD)
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unset(LINUX)
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# The CMAKE_EFFECTIVE_SYSTEM_NAME is used to load compiler and compiler
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# wrapper configuration files. By default it equals to CMAKE_SYSTEM_NAME
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# but could be overridden in the ${CMAKE_SYSTEM_NAME}-Initialize files.
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#
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# It is useful to share the same aforementioned configuration files and
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# avoids duplicating them in case of tightly related platforms.
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#
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# An example are the platforms supported by Xcode (macOS, iOS, tvOS,
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# and watchOS). For all of those the CMAKE_EFFECTIVE_SYSTEM_NAME is
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# set to Apple which results in using
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# Platform/Apple-AppleClang-CXX.cmake for the Apple C++ compiler.
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set(CMAKE_EFFECTIVE_SYSTEM_NAME "${CMAKE_SYSTEM_NAME}")
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include(Platform/${CMAKE_SYSTEM_NAME}-Initialize OPTIONAL)
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set(CMAKE_SYSTEM_SPECIFIC_INITIALIZE_LOADED 1)
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