Use mold to build mold

.github/workflows/ci.yml

@@ -19,8 +19,6 @@ jobs:
     steps:
     - uses: actions/checkout@v2
     - uses: rui314/setup-mold@staging
-      with:
-        make-default: false
     - name: apt-get
       run: sudo apt-get update && sudo apt-get install git build-essential libstdc++-10-dev cmake clang libssl-dev zlib1g-dev libtbb-dev git bsdmainutils dwarfdump
     - name: ccache

test/elf/run-clang.sh

@@ -29,10 +29,6 @@ int main() {
 }
 EOF
 
-clang -fuse-ld=bfd -o $t/exe $t/a.o
-readelf -p .comment $t/exe > $t/log
-! grep -q mold $t/log || false
-
 LD_PRELOAD=`pwd`/mold-wrapper.so MOLD_PATH=`pwd`/mold \
   clang -o $t/exe $t/a.o -fuse-ld=/usr/bin/ld
 readelf -p .comment $t/exe > $t/log

test/elf/run.sh

@@ -27,10 +27,6 @@ int main() {
 }
 EOF
 
-$GCC -fuse-ld=bfd -o $t/exe $t/a.o
-readelf -p .comment $t/exe > $t/log
-! grep -q mold $t/log || false
-
 LD_PRELOAD=`pwd`/mold-wrapper.so MOLD_PATH=`pwd`/mold \
   $GCC -o $t/exe $t/a.o -B/usr/bin
 readelf -p .comment $t/exe > $t/log