nghttp2_set_debug_vprintf_callback

Synopsis

#include <nghttp2/nghttp2.h>

void nghttp2_set_debug_vprintf_callback(nghttp2_debug_vprintf_callback debug_vprintf_callback)

Sets a debug output callback called by the library when built with DEBUGBUILD macro defined. If this option is not used, debug log is written into standard error output.

For builds without DEBUGBUILD macro defined, this function is noop.

Note that building with DEBUGBUILD may cause significant performance penalty to libnghttp2 because of extra processing. It should be used for debugging purpose only.

Warning

Building with DEBUGBUILD may cause significant performance penalty to libnghttp2 because of extra processing. It should be used for debugging purpose only. We write this two times because this is important.