devel/qt6-base fails to build after archivers/zstd update?

Hi,

I'm getting build failures on devel/qt6-base during the link stage:

...
ld: error: relocation R_X86_64_32 cannot be used against local symbol; 
recompile with -fPIC
 >>> defined in /usr/local/lib/libzstd.a(zstd_common.o)
 >>> referenced by zstd_common.c
 >>>               zstd_common.o:(ZSTD_versionString) in archive 
/usr/local/lib/libzstd.a

ld: error: relocation R_X86_64_32 cannot be used against local symbol; 
recompile with -fPIC
 >>> defined in /usr/local/lib/libzstd.a(error_private.o)
 >>> referenced by error_private.c
 >>>               error_private.o:(ERR_getErrorString) in archive 
/usr/local/lib/libzstd.a

ld: error: relocation R_X86_64_32S cannot be used against local symbol; 
recompile with -fPIC

I had a quick look thru' the commits, and I think that that the latest 
build-changes against archivers/zstd has triggered the failure?

Cheers
-- 
Jonathan Chen <jonc@chen.org.nz>