openharmony3.0头文件问题
我在code-3.0源码上编译oled例程时发现，build.gn中include头文件路径并不正确，但是能够编译成功，后来我干脆把include包含的头文件路径全删了，编译还是能够成功。
我又在code-1.0源码上尝试同样的操作，编译报错。
openharmony源码中头文件是怎样引用的，问啥在code-3.0中删除了build.gn中的头文件也能正常编译？
问题求助
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搞清楚了，在code-3.0中由config.gni为开发板编译相关的配置，编译时会采用该配置文件中的参数编译所有OS组件，编译阶段系统全局可见。在config.gni中包含了很多头文件，常用的基本包含在内了，如下所示：
# Board related headfiles search path.
board_include_dirs = [
"${ohos_root_path}device/hisilicon/hispark_pegasus/sdk_liteos/include",
"${ohos_root_path}device/hisilicon/hispark_pegasus/sdk_liteos/platform/include",
"${ohos_root_path}device/hisilicon/hispark_pegasus/sdk_liteos/platform/system/include",
"${ohos_root_path}device/hisilicon/hispark_pegasus/sdk_liteos/config",
"${ohos_root_path}device/hisilicon/hispark_pegasus/sdk_liteos/config/nv",
"${ohos_root_path}utils/native/lite/include",
"${ohos_root_path}device/hisilicon/hispark_pegasus/hi3861_adapter/kal/cmsis",
"${ohos_root_path}device/hisilicon/hispark_pegasus/sdk_liteos/platform/os/Huawei_LiteOS/kernel/base/include",
"${ohos_root_path}device/hisilicon/hispark_pegasus/sdk_liteos/platform/os/Huawei_LiteOS/targets/hi3861v100/include",
"${ohos_root_path}device/hisilicon/hispark_pegasus/sdk_liteos/platform/os/Huawei_LiteOS/kernel/include",
"${ohos_root_path}device/hisilicon/hispark_pegasus/sdk_liteos/platform/os/Huawei_LiteOS/arch/risc-v/rv32im",
"${ohos_root_path}device/hisilicon/hispark_pegasus/sdk_liteos/platform/os/Huawei_LiteOS/components/lib/libm/include",
"${ohos_root_path}device/hisilicon/hispark_pegasus/sdk_liteos/platform/os/Huawei_LiteOS/components/lib/libsec/include",
"${ohos_root_path}device/hisilicon/hispark_pegasus/sdk_liteos/platform/os/Huawei_LiteOS/net/wpa_supplicant-2.7/src/common",
"${ohos_root_path}device/hisilicon/hispark_pegasus/sdk_liteos/platform/os/Huawei_LiteOS/targets/hi3861v100/plat/riscv",
"${ohos_root_path}device/hisilicon/hispark_pegasus/sdk_liteos/platform/os/Huawei_LiteOS/kernel/include",
"${ohos_root_path}device/hisilicon/hispark_pegasus/sdk_liteos/platform/os/Huawei_LiteOS/kernel/extended/runstop",
"${ohos_root_path}device/hisilicon/hispark_pegasus/sdk_liteos/platform/os/Huawei_LiteOS/components/posix/include",
"${ohos_root_path}device/hisilicon/hispark_pegasus/sdk_liteos/platform/os/Huawei_LiteOS/components/linux/include",
"${ohos_root_path}device/hisilicon/hispark_pegasus/sdk_liteos/third_party/lwip_sack/include",
"${ohos_root_path}device/hisilicon/hispark_pegasus/sdk_liteos/platform/os/Huawei_LiteOS/components/lib/libc/musl/include",
"${ohos_root_path}device/hisilicon/hispark_pegasus/sdk_liteos/platform/os/Huawei_LiteOS/components/lib/libc/musl/arch/generic",
"${ohos_root_path}device/hisilicon/hispark_pegasus/sdk_liteos/platform/os/Huawei_LiteOS/components/lib/libc/musl/arch/riscv32",
"${ohos_root_path}device/hisilicon/hispark_pegasus/sdk_liteos/platform/os/Huawei_LiteOS/components/lib/libc/hw/include",
"${ohos_root_path}device/hisilicon/hispark_pegasus/sdk_liteos/platform/os/Huawei_LiteOS/components/lib/libc/nuttx/include",
"${ohos_root_path}device/hisilicon/hispark_pegasus/sdk_liteos/platform/os/Huawei_LiteOS/components/lib/libsec/include",
"${ohos_root_path}device/hisilicon/hispark_pegasus/sdk_liteos/platform/os/Huawei_LiteOS/targets/hi3861v100/config",
"${ohos_root_path}device/hisilicon/hispark_pegasus/sdk_liteos/platform/os/Huawei_LiteOS/targets/hi3861v100/user",
"${ohos_root_path}device/hisilicon/hispark_pegasus/sdk_liteos/platform/os/Huawei_LiteOS/targets/hi3861v100/plat",
"${ohos_root_path}device/hisilicon/hispark_pegasus/sdk_liteos/platform/os/Huawei_LiteOS/targets/hi3861v100/extend/include",
"${ohos_root_path}device/hisilicon/hispark_pegasus/sdk_liteos/platform/os/Huawei_LiteOS/arch",
"${ohos_root_path}device/hisilicon/hispark_pegasus/sdk_liteos/platform/os/Huawei_LiteOS/components/lib/libc/bionic/libm",
"${ohos_root_path}device/hisilicon/hispark_pegasus/sdk_liteos/platform/os/Huawei_LiteOS/shell/include",
"${ohos_root_path}device/hisilicon/hispark_pegasus/sdk_liteos/platform/os/Huawei_LiteOS/net/telnet/include",
]