oss4 does not build on ppc64el on groovy

When building the focal version of oss4 with groovy version of binutils, it fails with:

/tmp/ccoZchTf.s: Assembler messages:
/tmp/ccoZchTf.s: Error: invalid attempt to declare external version name as default in symbol `.snd_pcm_hw_params_set_rate_near@@ALSA_0.9.0rc4'
make[1]: *** [Makefile:16: pcm.lo] Error 1

Downgrading binutils to 2.34-6ubuntu1 fixes the problem. This works with gcc-9 9.3.0-10ubuntu2. Upgrading to groovy gcc-9 9.3.0-17ubuntu1 will force the upgrade of binutils, so can't be tested with the working version of binutils. Using the latest version of gcc-9 or gcc-10 from groovy with the broken binutils is still broken, so a complete upgrade does not fix the problem.

The following diff does fix the problem with binutils 2.35-2ubuntu1, though:
$ diff -u lib/libsalsa/alsa-symbols.h.old lib/libsalsa/alsa-symbols.h
--- lib/libsalsa/alsa-symbols.h.old 2020-08-13 22:47:28.249358919 +0000
+++ lib/libsalsa/alsa-symbols.h 2020-08-13 22:43:35.730423956 +0000
@@ -35,7 +35,7 @@
        __asm__ (".symver ." #real ",." #name "@" #version)
 # define default_symbol_version(real, name, version) \
        __asm__ (".symver " #real "," #name "@@" #version); \
- __asm__ (".symver ." #real ",." #name "@@" #version)
+// __asm__ (".symver ." #real ",." #name "@@" #version)
 #else
 # define symbol_version(real, name, version) \
        __asm__ (".symver " #real "," #name "@" #version)