"make coverage-lcov" doesn't work with lcov v2.x

[skirpichev]

Bug report

Bug description:

The Python Developer’s Guide says:

In order to create a HTML report you can install lcov.

Unfortunately, this doesn't work with a modern version of the lcov: e.g. first I got error about missing --path option. It "works for me" (with some warnings) on the patch:

diff --git a/Makefile.pre.in b/Makefile.pre.in
index 2b34b009fd7..20b895d488a 100644
--- a/Makefile.pre.in
+++ b/Makefile.pre.in
@@ -917,7 +917,6 @@ coverage-lcov:
        @lcov $(COVERAGE_LCOV_OPTIONS) --capture \
            --directory $(abs_builddir) \
            --base-directory $(realpath $(abs_builddir)) \
-           --path $(realpath $(abs_srcdir)) \
            --output-file $(COVERAGE_INFO)
        @ # remove 3rd party modules, system headers and internal files with
        @ # debug, test or dummy functions.
@@ -931,8 +930,11 @@ coverage-lcov:
            '/usr/include/*' \
            '/usr/local/include/*' \
            '/usr/lib/gcc/*' \
+               --ignore-errors inconsistent \
+               --ignore-errors unused \
            --output-file $(COVERAGE_INFO)
        @genhtml $(COVERAGE_INFO) \
+               --ignore-errors inconsistent \
            --output-directory $(COVERAGE_REPORT) \
            $(COVERAGE_REPORT_OPTIONS)
        @echo

CPython versions tested on:

CPython main branch

Operating systems tested on:

No response

[Aniketsy]

Unfortunately, this doesn't work with a modern version of the lcov: e.g. first I got error about missing --path option. It "works for me" (with some warnings) on the patch:

running this patch locally to see warning from my end, do we need to worry about warning ? also please let me know if you're planning to work on this or i can open a PR

[skirpichev]

please let me know if you're planning to work on this

No, I don't think I have decent experience with lcov.