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Diffstat (limited to 'boehm-gc/doc/README.macros')
| -rw-r--r-- | boehm-gc/doc/README.macros | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/boehm-gc/doc/README.macros b/boehm-gc/doc/README.macros index d9df8dd31a6..b5fe6796cc2 100644 --- a/boehm-gc/doc/README.macros +++ b/boehm-gc/doc/README.macros @@ -51,7 +51,18 @@ _DLL Defined by Visual C++ if dynamic libraries are being built __declspec(dllexport) needs to be added to declarations to support the case in which the collector is in a dll. -GC_DLL User-settable macro that forces the effect of _DLL. +GC_DLL User-settable macro that forces the effect of _DLL. Set + by gc.h if _DLL is defined and GC_NOT_DLL is undefined. + This is the macro that is tested internally to determine + whether the GC is in its own dynamic library. May need + to be set by clients before including gc.h. Note that + inside the GC implementation it indicates that the + collector is in its own dynamic library, should export + its symbols, etc. But in clients it indicates that the + GC resides in a different DLL, its entry points should + be referenced accordingly, and precautions may need to + be taken to properly deal with statically allocated + variables in the main program. Used only for MS Windows. GC_NOT_DLL User-settable macro that overrides _DLL, e.g. if dynamic libraries are used, but the collector is in a static library. |