MIPS: Reduce executable file size

Author: xfangfang

.github/workflows/ci.yaml

@@ -47,9 +47,9 @@ jobs:
           - { target: arm-linux-musleabi, os: ubuntu-latest, strip: "llvm-strip", upx: "upx --lzma",
               cmake: "-DUSE_SYSTEM_PCAP=OFF -DZIG_COMPILE_OPTION='-mcpu=arm1176jzf_s'", name: "(pi_zero_w)" }
           - { target: mipsel-linux-musl,  os: ubuntu-latest, strip: "llvm-strip", upx: "upx --lzma",
-              cmake: "-DUSE_SYSTEM_PCAP=OFF -DZIG_COMPILE_OPTION='-msoft-float'" }
+              cmake: "-DUSE_SYSTEM_PCAP=OFF -DZIG_COMPILE_OPTION='-msoft-float;-ffunction-sections'" }
           - { target: mips-linux-musl,  os: ubuntu-latest, strip: "llvm-strip", upx: "upx --lzma",
-              cmake: "-DUSE_SYSTEM_PCAP=OFF -DZIG_COMPILE_OPTION='-msoft-float'" }
+              cmake: "-DUSE_SYSTEM_PCAP=OFF -DZIG_COMPILE_OPTION='-msoft-float;-ffunction-sections'" }
     steps:
       - uses: actions/checkout@v4