gcc failure on -current on aarch64

I'm not sure whether to raise a ports PR for this, or if it's
an aarch64 problem or if it's a -current problem so if this is the
wrong list, please advise.

On a php80 installlation running recent -current using ports
built yesterday in poudriere with a fresh ports tree, php80-gd
upgraded but now php complains like this:

PHP Startup: Unable to load dynamic library 'gd.so' \
(tried: /usr/local/lib/php/20200930/gd.so (/lib/libgcc_s.so.1: \
version GCC_4.5.0 required by /usr/local/lib/gcc11/libstdc++.so.6 not found), \
/usr/local/lib/php/20200930/gd.so.so (/lib/libgcc_s.so.1: version GCC_4.5.0 \
required by /usr/local/lib/gcc11/libstdc++.so.6 not found)) in Unknown \
on line 0

Sure enough, GCC_4.5.0 isn't there

# strings /lib/libgcc_s.so.1 | ug GCC_

180: GCC_3.0
181: GCC_3.3
182: GCC_3.3.1
183: GCC_3.4
184: GCC_3.4.2
185: GCC_3.4.4
186: GCC_3.5
187: GCC_4.0.0
188: GCC_4.2.0
189: GCC_4.3.0
190: GCC_4.6.0

# strings /usr/local/lib/gcc11/libstdc++.so.6 | ug GCC_

6111: GCC_4.2.0
6112: GCC_3.3
6113: GCC_3.0
6114: GCC_4.5.0

Is the problem with base/ports/gcc{version}, gd, php?

freebsd-current is main-n257818 built 5th Sept
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