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fix warning "This object file does not define any previously undefined public symbols, so it will not be used by any link operation that consumes this library"

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nicolaichuk
2017-03-23 14:38:45 +03:00
parent 5527e36139
commit 71e411c2ca
2 changed files with 23 additions and 0 deletions
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1
src/BulletCollision/BroadphaseCollision/btBroadphaseProxy.cpp
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@@ -15,3 +15,4 @@ subject to the following restrictions:
#include "btBroadphaseProxy.h"
BT_NOT_EMPTY_FILE // fix warning LNK4221: This object file does not define any previously undefined public symbols, so it will not be used by any link operation that consumes this library

22
src/LinearMath/btScalar.h
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@@ -32,6 +32,28 @@ inline int btGetVersion()
return BT_BULLET_VERSION;
}
// The following macro "BT_NOT_EMPTY_FILE" can be put into a file
// in order suppress the MS Visual C++ Linker warning 4221
//
// warning LNK4221: no public symbols found; archive member will be inaccessible
//
// This warning occurs on PC and XBOX when a file compiles out completely
// has no externally visible symbols which may be dependant on configuration
// #defines and options.
//
// see more https://stackoverflow.com/questions/1822887/what-is-the-best-way-to-eliminate-ms-visual-c-linker-warning-warning-lnk422
#if defined (_MSC_VER)
#define BT_NOT_EMPTY_FILE_CAT_II(p, res) res
#define BT_NOT_EMPTY_FILE_CAT_I(a, b) BT_NOT_EMPTY_FILE_CAT_II(~, a ## b)
#define BT_NOT_EMPTY_FILE_CAT(a, b) BT_NOT_EMPTY_FILE_CAT_I(a, b)
#define BT_NOT_EMPTY_FILE namespace { char BT_NOT_EMPTY_FILE_CAT(NoEmptyFileDummy, __COUNTER__); }
#else
#define BT_NOT_EMPTY_FILE
#endif
// clang and most formatting tools don't support indentation of preprocessor guards, so turn it off
// clang-format off
#if defined(DEBUG) || defined (_DEBUG)