New comment by the-maldridge on void-packages repository

https://github.com/void-linux/void-packages/pull/17969#issuecomment-570085319

Comment:
I do indeed.  I disabled it and the build failed a little while after:

```
=> gcc-9.2.0_3: running do_configure ...
checking build system type... x86_64-unknown-linux-gnu
checking host system type... x86_64-unknown-linux-gnu
checking target system type... x86_64-unknown-linux-gnu
checking for a BSD-compatible install... /home/maldridge/Documents/void/packages/masterdir/builddir/.xbps-gcc/wrappers/install -c
checking whether ln works... yes
checking whether ln -s works... yes
checking for a sed that does not truncate output... /bin/sed
checking for gawk... gawk
checking for libatomic support... yes
checking for libitm support... yes
checking for libsanitizer support... yes
checking for libvtv support... yes
checking for libhsail-rt support... yes
checking for libphobos support... yes
checking for gcc... cc
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables... 
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether cc accepts -g... yes
checking for cc option to accept ISO C89... none needed
checking whether we are using the GNU C++ compiler... yes
checking whether g++ accepts -g... yes
checking whether g++ accepts -static-libstdc++ -static-libgcc... yes
checking for gnatbind... no
checking for gnatmake... no
checking whether compiler driver understands Ada... no
checking how to compare bootstrapped objects... cmp --ignore-initial=16 $$f1 $$f2
checking for objdir... .libs
configure: WARNING: using in-tree isl, disabling version check
configure: error: GNAT is required to build ada
=> ERROR: gcc-9.2.0_3: do_configure: 'CONFIG_SHELL=/bin/bash ${wrksrc}/configure ${_args}' exited with 1
=> ERROR:   in do_configure() at srcpkgs/gcc/template:311
=> ERROR: xbps-src: failed to build target dependency 'gcc-9.2.0_3' (1)
```

If you'd rather wait until Ada can be removed from the bootstrap set that's fine by me, but I believe its currently impossible to bootstrap.