This supports lcov 2.x in the sense that we are no-longer hardcoding version specific options, and instead will use the LCOV_OPTS variable (which is the more flexible thing to do in any case). It’s also quite likely that devs are already having to pass extra options to lcov 2.x, given it’s more stringent in terms of coverage generation and error checking. See this thread for an example: https://github.com/linux-test-project/lcov/issues/238.
Tested on one machine (LCOV 2.0, gcc 13.2) with:
0./autogen.sh
1./configure --enable-lcov CXXFLAGS="-fprofile-update=prefer-atomic" LCOV_OPTS="--rc branch_coverage=1 --ignore-errors mismatch"
2make
3make cov
4<snip>
5Processing file src/netaddress.cpp
6 lines=521 hit=480 functions=72 hit=72 branches=675 hit=499
7Overall coverage rate:
8 lines......: 81.8% (79362 of 97002 lines)
9 functions......: 77.8% (10356 of 13310 functions)
10 branches......: 49.6% (130628 of 263196 branches)
and another machine (LCOV 2.1, Clang 18.1.3) with:
0./autogen.sh
1./configure --enable-lcov CC=clang CXX=clang++ LCOV_OPTS="--rc branch_coverage=1 --ignore-errors mismatch,inconsistent"
2make
3make cov
4<snip>
5 Processing file src/util/strencodings.cpp
6 lines=315 hit=311 functions=38 hit=38 branches=425 hit=357
7 Overall coverage rate:
8 source files: 622
9 lines.......: 79.8% (70311 of 88132 lines)
10 functions...: 78.1% (13968 of 17881 functions)
11 branches....: 44.5% (157551 of 354317 branches)
12 Message summary:
13 101 warning messages:
14 count: 1
15 inconsistent: 100
16 3528 ignore messages:
17 inconsistent: 3528
Related to #28468.
