diff options
| -rw-r--r-- | pcap/funcattrs.h | 36 |
1 files changed, 34 insertions, 2 deletions
diff --git a/pcap/funcattrs.h b/pcap/funcattrs.h index 2afe3d07..c9e1a530 100644 --- a/pcap/funcattrs.h +++ b/pcap/funcattrs.h @@ -53,14 +53,46 @@ */ #if defined(_WIN32) - #ifdef pcap_EXPORTS + /* + * For Windows: + * + * when building libpcap: + * + * if we're building it as a DLL, we have to declare API + * functions with __declspec(dllexport); + * + * if we're building it as a static library, we don't want + * to do so. + * + * when using libpcap: + * + * if we're using the DLL, calls to its functions are a + * little more efficient if they're declared with + * __declspec(dllimport); + * + * if we're not using the dll, we don't want to declare + * them that way. + * + * So: + * + * if pcap_EXPORTS is defined, we define PCAP_API_DEF as + * __declspec(dllexport); + * + * if PCAP_DLL is defined, we define PCAP_API_DEF as + * __declspec(dllimport); + * + * otherwise, we define PCAP_API_DEF as nothing. + * + #if defined(pcap_EXPORTS) /* * We're compiling libpcap, so we should export functions in our * API. */ #define PCAP_API_DEF __declspec(dllexport) - #else + #elif defined(PCAP_DLL) #define PCAP_API_DEF __declspec(dllimport) + #else + #define PCAP_API_DEF #endif #elif defined(MSDOS) /* XXX - does this need special treatment? */ |