undefined symbol: CRYPTO_chacha_20 when built with boringssl

[Dave Kennard]

This is probably me doing something stupid, but I can't get nginx to run 
when built to use boringssl. When trying to run it (nginx -t) I get the 
error: undefined symbol: CRYPTO_chacha_20

I think it's just that it isn't loading the boringssl shared libs.

Nginx is configured as follows:

./configure --prefix=/opt/nginx-1.27.1 \
     --with-pcre={{ tarballs_path }}/pcre2-{{ pcre_version }} \
     --with-pcre-jit \
     --without-http_autoindex_module \
     --without-http_empty_gif_module \
     --without-http_ssi_module \
     --with-http_ssl_module \
     --with-http_v2_module \
     --with-http_v3_module \
     --with-ipv6 \
     --with-http_gzip_static_module \
     --with-http_realip_module \
     --add-module=../ngx_http_geoip2_module \
     --with-http_perl_module --with-perl_modules_path=perl/lib \
     --with-cc-opt='-I/opt/GeoIP/include -I/opt/boringssl/include' \
     --with-ld-opt='-Wl,-R,/opt/GeoIP/lib -L/opt/GeoIP/lib 
-L/opt/boringssl/lib'

And boringssl:

cmake -B build -DCMAKE_BUILD_TYPE=Release -DBUILD_SHARED_LIBS=1 
-DCMAKE_INSTALL_PREFIX=/opt/boringssl-{{ ansible_date_time.date }}

(/opt/boringssl is symlinked to /opt/boringssl-{{ ansible_date_time.date }})

Can anyone suggest what the problem might be?

Thanks

Dave