今天我Werror=Wcoverage_mismatch
在编译一些erlang/opt时遇到一个错误:
beam/beam_emu.c: In function 'erts_current_reductions':
beam/beam_emu.c:3150:1: error: the control flow of function 'erts_current_reductions' does not match its profile data (counter 'arcs') [-Werror=coverage-mismatch]
}
...
但我不知道这是什么意思,谷歌没有告诉我这个标志。下面是gcc源代码
if (entry->n_counts != n_counts)
warning_printed = warning_at(
DECL_SOURCE_LOCATION(current_function_decl), OPT_Wcoverage_mismatch,
"number of counters in profile data for function %qD "
"does not match "
"its profile data (counter %qs, expected %i and have %i)",
current_function_decl, ctr_names[counter], entry->n_counts, n_counts);
else
warning_printed = warning_at(
DECL_SOURCE_LOCATION(current_function_decl), OPT_Wcoverage_mismatch,
"the control flow of function %qD does not match "
"its profile data (counter %qs)",
current_function_decl, ctr_names[counter]);