On any of my 7 gentoo machines:

FAILED: ^[[0mvendor/CMakeFiles/libbase.dir/libbase/logging.cpp.o
/usr/bin/x86_64-pc-linux-gnu-g++  -Ivendor
-I/var/tmp/portage/dev-util/android-tools-31.0.0_p1/work/android-tools-31.0.0p1/vendor/libbase/include
-I/var/tmp/portage/dev-util/android-tools-31.0.0_p1/work/android-tools-31.0.0p1/vendor/core/include
-I/var/tmp/portage/dev-util/android-tools-31.0.0_p1/work/android-tools-31.0.0p1/vendor/logging/liblog/include
-O2 -pipe -std=gnu++2a -Wno-attributes -D_FILE_OFFSET_BITS=64 -MD -MT
vendor/CMakeFiles/libbase.dir/libbase/logging.cpp.o -MF
vendor/CMakeFiles/libbase.dir/libbase/logging.cpp.o.d -o
vendor/CMakeFiles/libbase.dir/libbase/logging.cpp.o -c
/var/tmp/portage/dev-util/android-tools-31.0.0_p1/work/android-tools-31.0.0p1/vendor/libbase/logging.cpp
during RTL pass: expand
/var/tmp/portage/dev-util/android-tools-31.0.0_p1/work/android-tools-31.0.0p1/vendor/libbase/logging.cpp:
In member function â~@~Xvoid
android::base::LogdLogger::operator()(android::base::LogId,
android::base::LogSeverity, const char*, const char*, unsigned int,
const char*)â~@~Y:
/var/tmp/portage/dev-util/android-tools-31.0.0_p1/work/android-tools-31.0.0p1/vendor/libbase/logging.cpp:330:6:
internal compiler error: in expand_expr_real_1, at expr.c:10012
   330 | void LogdLogger::operator()(LogId id, LogSeverity severity,
const char* tag, const char* file,
       |      ^~~~~~~~~~
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://bugs.gentoo.org/> for instructions.
[107/659] /usr/bin/x86_64-pc-linux-gnu-g++  -Ivendor
-I/var/tmp/portage/dev-util/android-tools-31.0.0_p1/work/android-tools-31.0.0p1/vendor/libbase/include
-I/var/tmp/portage/dev-util/android-tools-31.0.0_p1/work/android-tools-31.0.0p1/vendor/core/include
-I/var/tmp/portage/dev-util/android-tools-31.0.0_p1/work/android-tools-31.0.0p1/vendor/logging/liblog/include
-O2 -pipe -std=gnu++2a -Wno-attributes -D_FILE_OFFSET_BITS=64 -MD -MT
vendor/CMakeFiles/libbase.dir/libbase/mapped_file.cpp.o -MF
vendor/CMakeFiles/libbase.dir/libbase/mapped_file.cpp.o.d -o
vendor/CMakeFiles/libbase.dir/libbase/mapped_file.cpp.o -c
/var/tmp/portage/dev-util/android-tools-31.0.0_p1/work/android-tools-31.0.0p1/vendor/libbase/mapped_file.cpp
ninja: build stopped: subcommand failed.
  * ERROR: dev-util/android-tools-31.0.0_p1::gentoo failed (compile phase):
  *   ninja -v -j2 -l0 failed
  *
  * Call stack:
  *     ebuild.sh, line  127:  Called src_compile
  *   environment, line 3186:  Called cmake_src_compile
  *   environment, line 1231:  Called cmake_build
  *   environment, line 1200:  Called eninja
  *   environment, line 1707:  Called die
  * The specific snippet of code:
  *       "$@" || die "${nonfatal_args[@]}" "${*} failed"

I find no mention of this problem here, in the mailing list. There was
one hit in an internet search, but the conclusion was a bug in go, which
I don't have as described.

Anybody seen this?