libhttp git:(master) make
....stuff
src/httplib_error_string.c: In function ‘httplib_error_string’:
src/httplib_error_string.c:170:2: error: ignoring return value of ‘strerror_r’, declared with attribute
warn_unused_result [-Werror=unused-result]
strerror_r( error_code, buf, buf_len );
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors