New comment by Johnnynator on void-packages repository

https://github.com/void-linux/void-packages/pull/24258#issuecomment-753490303

Comment:
Everything seems to compile fine but `cross-powerpc64le-linux-gnu` @q66 

```
In file included from <command-line>:
../sysdeps/ieee754/ldbl-opt/nldbl-sscanf.c:22:23: error: '_IO_sscanf' aliased to undefined symbol 'sscanf'
   22 | strong_alias (sscanf, _IO_sscanf)
      |                       ^~~~~~~~~~
./../include/libc-symbols.h:140:26: note: in definition of macro '_strong_alias'
  140 |   extern __typeof (name) aliasname __attribute__ ((alias (#name))) \
      |                          ^~~~~~~~~
../sysdeps/ieee754/ldbl-opt/nldbl-sscanf.c:22:1: note: in expansion of macro 'strong_alias'
   22 | strong_alias (sscanf, _IO_sscanf)
      | ^~~~~~~~~~~~
```
There is a bug report for this: https://sourceware.org/bugzilla/show_bug.cgi?id=26360

I can workaround this like that, but dunno if this is what we want.
```diff
diff --git a/srcpkgs/cross-powerpc64le-linux-gnu/template b/srcpkgs/cross-powerpc64le-linux-gnu/template
index 90e8c7b365..3f8fc76c6a 100644
--- a/srcpkgs/cross-powerpc64le-linux-gnu/template
+++ b/srcpkgs/cross-powerpc64le-linux-gnu/template
@@ -30,6 +30,7 @@ nocross=yes
 
 cross_triplet=${_triplet}
 cross_linux_arch=powerpc
+cross_gcc_bootstrap_configure_args="--with-long-double-128"
 cross_binutils_configure_args="--enable-secureplt"
 # explicitly enable for final gcc, gfortran does not build without on ppc64le
 cross_gcc_configure_args="--enable-libquadmath"
```

<details>
<summary>Cross chains built:</summary>

```
cross-aarch64-linux-gnu-0.34_1.i686.xbps
cross-aarch64-linux-gnu-0.34_1.x86_64-musl.xbps
cross-aarch64-linux-gnu-0.34_1.x86_64.xbps
cross-aarch64-linux-musl-0.34_1.i686.xbps
cross-aarch64-linux-musl-0.34_1.x86_64-musl.xbps
cross-aarch64-linux-musl-0.34_1.x86_64.xbps
cross-arm-linux-gnueabi-0.34_1.i686.xbps
cross-arm-linux-gnueabi-0.34_1.x86_64-musl.xbps
cross-arm-linux-gnueabi-0.34_1.x86_64.xbps
cross-arm-linux-gnueabihf-0.34_1.i686.xbps
cross-arm-linux-gnueabihf-0.34_1.x86_64-musl.xbps
cross-arm-linux-gnueabihf-0.34_1.x86_64.xbps
cross-arm-linux-musleabi-0.34_1.i686.xbps
cross-arm-linux-musleabi-0.34_1.x86_64-musl.xbps
cross-arm-linux-musleabi-0.34_1.x86_64.xbps
cross-arm-linux-musleabihf-0.34_1.i686.xbps
cross-arm-linux-musleabihf-0.34_1.x86_64-musl.xbps
cross-arm-linux-musleabihf-0.34_1.x86_64.xbps
cross-armv7l-linux-gnueabihf-0.34_1.i686.xbps
cross-armv7l-linux-gnueabihf-0.34_1.x86_64-musl.xbps
cross-armv7l-linux-gnueabihf-0.34_1.x86_64.xbps
cross-armv7l-linux-musleabihf-0.34_1.i686.xbps
cross-armv7l-linux-musleabihf-0.34_1.x86_64-musl.xbps
cross-armv7l-linux-musleabihf-0.34_1.x86_64.xbps
cross-i686-linux-musl-0.34_1.i686.xbps
cross-i686-linux-musl-0.34_1.x86_64-musl.xbps
cross-i686-linux-musl-0.34_1.x86_64.xbps
cross-i686-pc-linux-gnu-0.34_1.x86_64-musl.xbps
cross-i686-pc-linux-gnu-0.34_1.x86_64.xbps
cross-mips-linux-musl-0.34_1.i686.xbps
cross-mips-linux-musl-0.34_1.x86_64-musl.xbps
cross-mips-linux-musl-0.34_1.x86_64.xbps
cross-mips-linux-muslhf-0.34_1.i686.xbps
cross-mips-linux-muslhf-0.34_1.x86_64-musl.xbps
cross-mips-linux-muslhf-0.34_1.x86_64.xbps
cross-mipsel-linux-musl-0.34_1.i686.xbps
cross-mipsel-linux-musl-0.34_1.x86_64-musl.xbps
cross-mipsel-linux-musl-0.34_1.x86_64.xbps
cross-mipsel-linux-muslhf-0.34_1.i686.xbps
cross-mipsel-linux-muslhf-0.34_1.x86_64-musl.xbps
cross-mipsel-linux-muslhf-0.34_1.x86_64.xbps
cross-powerpc-linux-gnu-0.34_1.i686.xbps
cross-powerpc-linux-gnu-0.34_1.x86_64-musl.xbps
cross-powerpc-linux-gnu-0.34_1.x86_64.xbps
cross-powerpc-linux-musl-0.34_1.i686.xbps
cross-powerpc-linux-musl-0.34_1.x86_64-musl.xbps
cross-powerpc-linux-musl-0.34_1.x86_64.xbps
cross-powerpc64-linux-gnu-0.34_1.i686.xbps
cross-powerpc64-linux-gnu-0.34_1.x86_64-musl.xbps
cross-powerpc64-linux-gnu-0.34_1.x86_64.xbps
cross-powerpc64-linux-musl-0.34_1.i686.xbps
cross-powerpc64-linux-musl-0.34_1.x86_64-musl.xbps
cross-powerpc64-linux-musl-0.34_1.x86_64.xbps
cross-powerpc64le-linux-musl-0.34_1.i686.xbps
cross-powerpc64le-linux-musl-0.34_1.x86_64-musl.xbps
cross-powerpc64le-linux-musl-0.34_1.x86_64.xbps
cross-powerpcle-linux-gnu-0.34_1.i686.xbps
cross-powerpcle-linux-gnu-0.34_1.x86_64-musl.xbps
cross-powerpcle-linux-gnu-0.34_1.x86_64.xbps
cross-powerpcle-linux-musl-0.34_1.i686.xbps
cross-powerpcle-linux-musl-0.34_1.x86_64-musl.xbps
cross-powerpcle-linux-musl-0.34_1.x86_64.xbps
cross-x86_64-linux-gnu-0.34_1.i686.xbps
cross-x86_64-linux-gnu-0.34_1.x86_64-musl.xbps
cross-x86_64-linux-musl-0.34_1.i686.xbps
cross-x86_64-linux-musl-0.34_1.x86_64.xbps
```

</details>

<details>
<summary>Native ones:</summary>

```
hostdir/binpkgs/gcc10/gcc-10.2.0_1.aarch64-musl.xbps
hostdir/binpkgs/gcc10/gcc-10.2.0_1.aarch64.xbps
hostdir/binpkgs/gcc10/gcc-10.2.0_1.armv6l-musl.xbps
hostdir/binpkgs/gcc10/gcc-10.2.0_1.armv6l.xbps
hostdir/binpkgs/gcc10/gcc-10.2.0_1.armv7l-musl.xbps
hostdir/binpkgs/gcc10/gcc-10.2.0_1.armv7l.xbps
hostdir/binpkgs/gcc10/gcc-10.2.0_1.i686.xbps
hostdir/binpkgs/gcc10/gcc-10.2.0_1.x86_64-musl.xbps
hostdir/binpkgs/gcc10/gcc-10.2.0_1.x86_64.xbps
```

</details>