https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65675
--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
libitm needs getenv, and so does libsanitizer:
/home/test/src/gcc/libsanitizer/ubsan/ubsan_flags.cpp: In function ‘const char*
__ubsan::GetFlag(const char*)’:
/home/test/src/gcc/libsanitizer/ubsan/ubsan_flags.cpp:29:12: error: ‘getenv’
was not declared in this scope
29 | return getenv(flag);
| ^~~~~~
So we need --disable-libsanitizer too.
