How can I link the pass-processed httpd.bc to the executable program httpd?

Beginners
,
1

I want to try compiling and optimizing Apache httpd, as well as adding some pass processing. My compilation command is as follows:

CC=/opt/aflpp/afl-clang-lto \
CXX=/opt/aflpp/afl-clang-lto++ \
LD=/usr/lib/llvm-12/bin/ld.lld \
CFLAGS='-g -w -flto  \
CXXFLAGS='-g -w -flto  -std=c++11 -stdlib=libc++' \
LDFLAGS='-flto -fuse-ld=gold -Wl,-plugin-opt=save-temps' \
RANLIB=llvm-ranlib-12 \
./configure --with-apr="/usr/local/apache_lab/apr/" \
            --with-apr-util="/usr/local/apache_lab/apr-util/" \
            --with-expat="/usr/local/apache_lab/expat/" \
            --with-pcre="/usr/local/apache_lab/pcre/" \
            --disable-pie \
            --disable-so \
            --disable-example-ipc \
            --disable-example-hooks \
            --disable-optional-hook-export \
            --disable-optional-hook-import \
            --disable-optional-fn-export \
            --disable-optional-fn-import \
            --with-mpm=prefork \
            --enable-static-support \
            --enable-mods-static=reallyall \
            --enable-debugger-mode \
            --with-crypto --with-openssl \
            --disable-shared

-Wl,-plugin-opt=save-temps can generate some intermediate bitcode files, such as the one I generated, httpd.0.0.preopt.bc. At this point, I use the first pass for optimization:
opt-12 -load libAssignEdges.so -assign-edge-ids -o httpd.bc httpd.0.0.preopt.bc to get httpd.bc
How can I link the pass-processed httpd.bc to the executable program httpd?