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48 lines
2.0 KiB
C++
48 lines
2.0 KiB
C++
// Copyright (C) 2014 Davis E. King (davis@dlib.net)
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// License: Boost Software License See LICENSE.txt for the full license.
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#ifndef DLIB_TEST_FOR_ODR_VIOLATIONS_CPp_
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#define DLIB_TEST_FOR_ODR_VIOLATIONS_CPp_
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#include "test_for_odr_violations.h"
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extern "C"
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{
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// The point of this block of code is to cause a link time error that will prevent a user
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// from compiling part of their application with DLIB_ASSERT enabled and part with them
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// disabled since doing that would be a violation of C++'s one definition rule.
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#ifdef ENABLE_ASSERTS
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const int USER_ERROR__inconsistent_build_configuration__see_dlib_faq_1 = 0;
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#else
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const int USER_ERROR__inconsistent_build_configuration__see_dlib_faq_1_ = 0;
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#endif
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// The point of this block of code is to cause a link time error if someone builds dlib via
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// cmake as a separately installable library, and therefore generates a dlib/config.h from
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// cmake, but then proceeds to use the default unconfigured dlib/config.h from version
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// control. It should be obvious why this is bad, if it isn't you need to read a book
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// about C++. Moreover, it can only happen if someone manually copies files around and
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// messes things up. If instead they run `make install` or `cmake --build . --target
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// install` things will be setup correctly, which is what they should do. To summarize: DO
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// NOT BUILD A STANDALONE DLIB AND THEN GO CHERRY PICKING FILES FROM THE BUILD FOLDER AND
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// MIXING THEM WITH THE SOURCE FROM GITHUB. USE CMAKE'S INSTALL SCRIPTS TO INSTALL DLIB.
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// Or even better, don't install dlib at all and instead build your program as shown in
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// examples/CMakeLists.txt
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#if defined(DLIB_NOT_CONFIGURED) && !defined(DLIB__CMAKE_GENERATED_A_CONFIG_H_FILE)
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const int USER_ERROR__inconsistent_build_configuration__see_dlib_faq_2 = 0;
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#endif
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#ifdef DLIB_CHECK_FOR_VERSION_MISMATCH
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const int DLIB_CHECK_FOR_VERSION_MISMATCH = 0;
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#endif
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}
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#endif // DLIB_TEST_FOR_ODR_VIOLATIONS_CPp_
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