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Diffstat (limited to 'bpkg/export')
| -rw-r--r-- | bpkg/export | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/bpkg/export b/bpkg/export new file mode 100644 index 0000000..7bbb994 --- /dev/null +++ b/bpkg/export @@ -0,0 +1,41 @@ +// file : bpkg/export -*- C++ -*- +// copyright : Copyright (c) 2014-2016 Code Synthesis Ltd +// license : MIT; see accompanying LICENSE file + +#ifndef BPKG_EXPORT +#define BPKG_EXPORT + +// Normally we don't export class templates (but do complete specializations), +// inline functions, and classes with only inline member functions. Exporting +// classes that inherit from non-exported/import bases (e.g., std::string) +// will end up badly. The only known workarounds are to not inherit or to not +// export. Also, MinGW GCC doesn't like seeing non-exported function being +// used before their inline definition. The workaround is to reorder code. In +// the end it's all trial and error. + +#if defined(LIBBPKG_STATIC) // Using static. +# define LIBBPKG_EXPORT +#elif defined(LIBBPKG_STATIC_BUILD) // Building static. +# define LIBBPKG_EXPORT +#elif defined(LIBBPKG_SHARED) // Using shared. +# ifdef _WIN32 +# define LIBBPKG_EXPORT __declspec(dllimport) +# else +# define LIBBPKG_EXPORT +# endif +#elif defined(LIBBPKG_SHARED_BUILD) // Building shared. +# ifdef _WIN32 +# define LIBBPKG_EXPORT __declspec(dllexport) +# else +# define LIBBPKG_EXPORT +# endif +#else +// If none of the above macros are defined, then we assume we are being using +// by some third-party build system that cannot/doesn't signal the library +// type. Note that this fallback works for both static and shared but in case +// of shared will be sub-optimal compared to having dllimport. +// +# define LIBBPKG_EXPORT // Using static or shared. +#endif + +#endif // BPKG_EXPORT |