以下是原文中关于错误及解决方法的描述:
Code built with gcc on Mac OS X 10.6 uses the object size checking feature of gcc by default. This involves redefining several functions as macros; one of these functions is snprintf: #define snprintf(str, len, ...) \ __builtin___snprintf_chk (str, len, 0, __darwin_obsz(str), __VA_ARGS__) The usage of snprintf in src/serv.c in gnutls-2.10.4 is not compatible with that macro. serv.c attempts to use a macro (tmp2) that expands into two different arguments: #define tmp2 &http_buffer[strlen(http_buffer)], len-strlen(http_buffer) snprintf (tmp2, "%.2X", sesid[i]); Due to how nested macro evaluation works, the snprintf macro sees tmp2 as a single argument, and copies it into __darwin_obsz(); then, when tmp2 is expanded, __darwin_obsz has two arguments, but it is only defined for one, and the result is a compilation error. One way to work around this issue might be to define _FORTIFY_SOURCE=0 so that the snprintf macro is not defined, or simply doing an #undef snprintf for that file, but it seems safer and more portable to split tmp2 into two macros. I append a patch that does so.GnuTLS 的详细介绍：请点这里
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