[Bug gcov-profile/101773] errors when writing to .gcda file are not checked

[vincent-gcc at vinc17 dot net via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101773

--- Comment #4 from Vincent Lefèvre <vincent-gcc at vinc17 dot net> ---
GCOV_EXIT_AT_ERROR is not documented in the man page.

Anyway, it doesn't seem to work:

$ export GCOV_EXIT_AT_ERROR=1
$ printenv GCOV_EXIT_AT_ERROR
1
$ gcc-test -O -fprofile-generate=dir tst.c
$ ./a.out
$ echo $?
0
$ ls -l dir/*.gcda
-rw-r--r-- 1 vlefevre vlefevre 0 2021-08-04 14:48:01
dir/#home#vlefevre#a-tst.gcda