llvm clang 编译 json-c 库时报错

**【模块名_概率】简要描述：**
我使用适配鸿蒙 SDK + vcpkg 编译 json-c 库时，报错

vcpkg已经适配OHOS：https://gitee.com/oh-graphics/vcpkg
json-c库： https://github.com/json-c/json-c

Run Build Command(s): /Users/hejingdong/vcpkg-ohos/downloads/tools/ninja/1.12.1-osx/ninja -v -v -j17 install
[1/18] /Users/hejingdong/HarmonyOS/command-line-tools/sdk/default/openharmony/native/llvm/bin/clang --target=aarch64-linux-ohos --gcc-toolchain=/Users/hejingdong/HarmonyOS/command-line-tools/sdk/default/openharmony/native/llvm --sysroot=/Users/hejingdong/HarmonyOS/command-line-tools/sdk/default/openharmony/native/sysroot -D_GNU_SOURCE -I/Users/hejingdong/vcpkg-ohos/buildtrees/json-c/src/8-20240915-0133e87d43.clean -I/Users/hejingdong/vcpkg-ohos/buildtrees/json-c/arm64-ohos-dbg -fdata-sections -ffunction-sections -funwind-tables -fstack-protector-strong -no-canonical-prefixes -fno-addrsig -Wa,--noexecstack -Wformat -Werror=format-security  -D__MUSL__ -ffunction-sections -fdata-sections -Werror -Wall -Wcast-qual -Wno-error=deprecated-declarations -Wextra -Wwrite-strings -Wno-unused-parameter -Wstrict-prototypes -O0 -g -fno-limit-debug-info  -fPIC -MD -MT CMakeFiles/json-c.dir/debug.c.o -MF CMakeFiles/json-c.dir/debug.c.o.d -o CMakeFiles/json-c.dir/debug.c.o -c /Users/hejingdong/vcpkg-ohos/buildtrees/json-c/src/8-20240915-0133e87d43.clean/debug.c
FAILED: CMakeFiles/json-c.dir/debug.c.o 
/Users/hejingdong/HarmonyOS/command-line-tools/sdk/default/openharmony/native/llvm/bin/clang --target=aarch64-linux-ohos --gcc-toolchain=/Users/hejingdong/HarmonyOS/command-line-tools/sdk/default/openharmony/native/llvm --sysroot=/Users/hejingdong/HarmonyOS/command-line-tools/sdk/default/openharmony/native/sysroot -D_GNU_SOURCE -I/Users/hejingdong/vcpkg-ohos/buildtrees/json-c/src/8-20240915-0133e87d43.clean -I/Users/hejingdong/vcpkg-ohos/buildtrees/json-c/arm64-ohos-dbg -fdata-sections -ffunction-sections -funwind-tables -fstack-protector-strong -no-canonical-prefixes -fno-addrsig -Wa,--noexecstack -Wformat -Werror=format-security  -D__MUSL__ -ffunction-sections -fdata-sections -Werror -Wall -Wcast-qual -Wno-error=deprecated-declarations -Wextra -Wwrite-strings -Wno-unused-parameter -Wstrict-prototypes -O0 -g -fno-limit-debug-info  -fPIC -MD -MT CMakeFiles/json-c.dir/debug.c.o -MF CMakeFiles/json-c.dir/debug.c.o.d -o CMakeFiles/json-c.dir/debug.c.o -c /Users/hejingdong/vcpkg-ohos/buildtrees/json-c/src/8-20240915-0133e87d43.clean/debug.c
clang: error: argument unused during compilation: '--gcc-toolchain=/Users/hejingdong/HarmonyOS/command-line-tools/sdk/default/openharmony/native/llvm' [-Werror,-Wunused-command-line-argument]

**【环境信息】:** 
- 网络环境
- 硬件开发板型号
- 软件版本信息或tag节点
- 测试环境
- 其他

**【预置条件】:**

已经根据方法修改vcpkg
https://www.cnblogs.com/jackieathome/p/17937884

**【测试步骤】：**
vcpkg install json-c:arm64-ohos --debug

**【预期结果】：**

**【实际结果】：**

**【恢复手段】：**

**【出现概率】：问题出现次数/实际测试次数**

**【定位信息】：**

- 1. Log、截图、多媒体文件等，所有和问题有关的信息：

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