+#include "config.h"
+
+#ifdef PCI_SHARED_LIB
+#define PCI_ABI __attribute__((visibility("default")))
+// Functions, which are bound to externally visible symbols by the versioning
+// mechanism, have to be declared as VERSIONED. Otherwise, GCC with global
+// optimizations is happy to optimize them away, leading to linker failures.
+#define VERSIONED_ABI __attribute__((used)) PCI_ABI
+#ifdef __APPLE__
+#define STATIC_ALIAS(_decl, _for) _decl PCI_ABI { return _for; }
+#define DEFINE_ALIAS(_decl, _for)
+#define SYMBOL_VERSION(_int, _ext)
+#else
+#define STATIC_ALIAS(_decl, _for)
+#define DEFINE_ALIAS(_decl, _for) extern _decl __attribute__((alias(#_for)))
+#define SYMBOL_VERSION(_int, _ext) asm(".symver " #_int "," #_ext)
+#endif
+#else
+#define VERSIONED_ABI
+#define STATIC_ALIAS(_decl, _for) _decl { return _for; }
+#define DEFINE_ALIAS(_decl, _for)
+#define SYMBOL_VERSION(_int, _ext)
+#endif
+