Stop using mold linker

There isn't anything wrong with with 'mold' as such, but it also
doesn't give any benefit. Better to stick to the defaults when there's
no reason to deviate.

'mold' might be a little faster, but it's insignificant when doing a
full build. It might make a difference when doing an incremental
build, but docker builds are not incremental.

I didn't remove 'mold' from the build-tools image yet, as I'm not sure
if the image might still be used to build old images that are still
using 'mold', or perhaps to build PRs created earlier. I will remove
'mold' from build-tools later as a separate PR, after some time has
passed.

.github/workflows/_build-and-test-locally.yml

@@ -145,32 +145,32 @@ jobs:
 
       - name: Build postgres v14
         if: steps.cache_pg_14.outputs.cache-hit != 'true'
-        run: mold -run make ${make_vars} postgres-v14 -j$(nproc)
+        run: make ${make_vars} postgres-v14 -j$(nproc)
 
       - name: Build postgres v15
         if: steps.cache_pg_15.outputs.cache-hit != 'true'
-        run: mold -run make ${make_vars} postgres-v15 -j$(nproc)
+        run: make ${make_vars} postgres-v15 -j$(nproc)
 
       - name: Build postgres v16
         if: steps.cache_pg_16.outputs.cache-hit != 'true'
-        run: mold -run make ${make_vars} postgres-v16 -j$(nproc)
+        run: make ${make_vars} postgres-v16 -j$(nproc)
 
       - name: Build postgres v17
         if: steps.cache_pg_17.outputs.cache-hit != 'true'
-        run: mold -run make ${make_vars} postgres-v17 -j$(nproc)
+        run: make ${make_vars} postgres-v17 -j$(nproc)
 
       - name: Build neon extensions
-        run: mold -run make ${make_vars} neon-pg-ext -j$(nproc)
+        run: make ${make_vars} neon-pg-ext -j$(nproc)
 
       - name: Build walproposer-lib
-        run: mold -run make ${make_vars} walproposer-lib -j$(nproc)
+        run: make ${make_vars} walproposer-lib -j$(nproc)
 
       - name: Run cargo build
         env:
           WITH_TESTS: ${{ matrix.sanitizers != 'enabled' && '--tests' || '' }}
         run: |
           export ASAN_OPTIONS=detect_leaks=0
-          ${cov_prefix} mold -run cargo build $CARGO_FLAGS $CARGO_FEATURES --bins ${WITH_TESTS}
+          ${cov_prefix} cargo build $CARGO_FLAGS $CARGO_FEATURES --bins ${WITH_TESTS}
 
       # Do install *before* running rust tests because they might recompile the
       # binaries with different features/flags.

Dockerfile

@@ -24,7 +24,7 @@ COPY --chown=nonroot scripts/ninstall.sh scripts/ninstall.sh
 
 ENV BUILD_TYPE=release
 RUN set -e \
-    && mold -run make -j $(nproc) -s neon-pg-ext \
+    && make -j $(nproc) -s neon-pg-ext \
     && rm -rf pg_install/build \
     && tar -C pg_install -czf /home/nonroot/postgres_install.tar.gz .
 
@@ -45,7 +45,7 @@ COPY --chown=nonroot . .
 
 ARG ADDITIONAL_RUSTFLAGS
 RUN set -e \
-    && RUSTFLAGS="-Clinker=clang -Clink-arg=-fuse-ld=mold -Clink-arg=-Wl,--no-rosegment -Cforce-frame-pointers=yes ${ADDITIONAL_RUSTFLAGS}" cargo build \
+    && RUSTFLAGS="-Clink-arg=-Wl,--no-rosegment -Cforce-frame-pointers=yes ${ADDITIONAL_RUSTFLAGS}" cargo build \
       --bin pg_sni_router  \
       --bin pageserver  \
       --bin pagectl  \

compute/compute-node.Dockerfile

@@ -1578,7 +1578,7 @@ ENV BUILD_TAG=$BUILD_TAG
 USER nonroot
 # Copy entire project to get Cargo.* files with proper dependencies for the whole project
 COPY --chown=nonroot . .
-RUN mold -run cargo build --locked --profile release-line-debug-size-lto --bin compute_ctl --bin fast_import --bin local_proxy
+RUN cargo build --locked --profile release-line-debug-size-lto --bin compute_ctl --bin fast_import --bin local_proxy
 
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