+2020-05-11 Martin Liska <mliska@suse.cz>
+
+ PR gcov-profile/94928
+ * gcov-io.h: Add caveat about coverage format parsing and
+ possible outdated documentation.
+
2020-05-11 Xiong Hu Luo <luoxhu@linux.ibm.com>
PR tree-optimization/83403
<http://www.gnu.org/licenses/>. */
-/* Coverage information is held in two files. A notes file, which is
+/* CAVEAT: Coverage information files should not be parsed directly,
+ instead use `gcov --json-format`, which provides
+ machine-readable coverage information.
+
+ Note that the following file format documentation might be outdated.
+
+ Coverage information is held in two files. A notes file, which is
generated by the compiler, and a data file, which is generated by
the program under test. Both files use a similar structure. We do
not attempt to make these files backwards compatible with previous