Conditionally provide cc in musl-toolchain.sh

src/ci/docker/dist-x86_64-musl/Dockerfile

@@ -23,7 +23,7 @@ COPY scripts/musl-toolchain.sh /build/
 # We need to mitigate rust-lang/rust#34978 when compiling musl itself as well
 RUN CFLAGS="-Wa,-mrelax-relocations=no -Wa,--compress-debug-sections=none -Wl,--compress-debug-sections=none" \
     CXXFLAGS="-Wa,-mrelax-relocations=no -Wa,--compress-debug-sections=none -Wl,--compress-debug-sections=none" \
-    bash musl-toolchain.sh x86_64 && rm -rf build
+    REPLACE_CC=1 bash musl-toolchain.sh x86_64 && rm -rf build
 
 COPY scripts/sccache.sh /scripts/
 RUN sh /scripts/sccache.sh

src/ci/docker/scripts/musl-toolchain.sh

@@ -46,12 +46,14 @@ ln -s $OUTPUT/$TARGET/lib/libc.so /lib/ld-musl-$ARCH.so.1
 echo $OUTPUT/$TARGET/lib >> /etc/ld-musl-$ARCH.path
 
 # Now when musl bootstraps itself create proper toolchain symlinks to make build and tests easier
-for exec in cc gcc; do
-    ln -s $TARGET-gcc /usr/local/bin/$exec
-done
-for exec in cpp c++ g++; do
-    ln -s $TARGET-g++ /usr/local/bin/$exec
-done
+if [ "$REPLACE_CC" = "1" ]; then
+    for exec in cc gcc; do
+        ln -s $TARGET-gcc /usr/local/bin/$exec
+    done
+    for exec in cpp c++ g++; do
+        ln -s $TARGET-g++ /usr/local/bin/$exec
+    done
+fi
 
 export CC=$TARGET-gcc
 export CXX=$TARGET-g++