build all objects

.github/workflows/build.yml

@@ -35,6 +35,7 @@ jobs:
             # test: ${{ fromJson(needs.enumerate-tests.outputs.matrix) }}
             test:
               - test_basic
+              - test_c
         max-parallel: 1
     steps:
       - uses: actions/checkout@v4
@@ -44,9 +45,8 @@ jobs:
           entrypoint: sh
           args: |
             -c "\
-            riscv64-unknown-elf-gcc --version && \
             cd tests/${{ matrix.test }} && \
-            make test.o && \
+            make obj && \
             riscv64-unknown-elf-ld -melf32lriscv -T tb.ld test.o -o tb.elf && \
             riscv64-unknown-elf-objcopy --target=verilog tb.elf tb.hex && \
             echo "done" \