[Bug bootstrap/82087] HEAD fails to bootstrap on x86_64-apple-darwin16.7.0

[d25fe0be at outlook dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82087

--- Comment #1 from d25fe0be@ <d25fe0be at outlook dot com> ---
Sorry, the command invoked was missing:

```
clang++ -std=gnu++98 -fno-PIE -c   -g  -DIN_GCC    -fno-strict-aliasing
-fno-exceptions -fno-rtti -fasynchronous-unwind-tables -W -Wall -Wno-narrowing
-Wwrite-strings -Wcast-qual -Wno-format -Wmissing-format-attribute
-Woverloaded-virtual -pedantic -Wno-long-long -Wno-variadic-macros
-Wno-overlength-strings   -DHAVE_CONFIG_H -I. -I. -I../../gcc -I../../gcc/.
-I../../gcc/../include -I../../gcc/../libcpp/include
-I/usr/local/opt/gmp/include -I/usr/local/opt/mpfr/include
-I/usr/local/opt/libmpc/include  -I../../gcc/../libdecnumber
-I../../gcc/../libdecnumber/dpd -I../libdecnumber -I../../gcc/../libbacktrace
-I/usr/local/opt/isl/include  -o builtins.o -MT builtins.o -MMD -MP -MF
./.deps/builtins.TPo ../../gcc/builtins.c
```