Signed-off-by: Nzhuoli <pengzhuoli@huawei.com>

2. Add BUILD.gn and its components
Signed-off-by: Nzhuoli <pengzhuoli@huawei.com>

since the prebuilts sysroot was deleted and auto-generated
at build time, we should add the linux porting modifications
from the origin prebuilt sysroot.
Signed-off-by: NCaoruihong <crh.cao@huawei.com>
Change-Id: Ib277e01709484facf367a4e073f8b286ebef9e78

LiteOS_a中有部分配置宏进行了重复冗余定义，导致当头文件未被包含时，极易引入错误，
故对menuconfig配置宏进行统一处理，均使用#ifdef/#ifndef作为预编译判断方式

Close #I3YEGS

Change-Id: I0fbc7025029a694590a5fa403686916ade02b367
Signed-off-by: Nboxi <lewis.liulei@huawei.com>

musl c is not ready for replacement of toolchain's libc, we comment
out some conflict functions temporary.
Signed-off-by: NCaoruihong <crh.cao@huawei.com>
Change-Id: Ifd5e7aa39fd18db5b8c68f24791e9dcb706e257d

add BUILD.gn for liteos_m kernel portings.
add new posix api: htonl, htons, ntohl, ntohs
Signed-off-by: NCaoruihong <crh.cao@huawei.com>
Change-Id: I3581032659bdc68e98a9470050549faf9f8cbcbb

【背景】
 arm none eabi编译器适配

【修改方案】
 增加编译宏

 re #I3WVXZ
Signed-off-by: Nx_xiny <1301913191@qq.com>

 Change-Id: I834395ba5aeb0a4caeb642ac2fbf4553c30ac3f0

 Change-Id: Ifffd2b7fb3319e8b4a243acdc973e1a36a357e5d

Change-Id: Iefdfdeb5c42c623289185725c2c7e5d64da1159c

由于srand设置时间种子时未使用入参，导致时间种子设置失败，
引发rand生成随机端口固定

close: #I3V8WS
Signed-off-by: Nzff <zhangfanfan2@huawei.com>
Change-Id: Idabed287fa7584ae9c6f2cc966afa35032e24a70

isolate changes, keep orignal musl sources clean.
Signed-off-by: NCaoruihong <crh.cao@huawei.com>
Change-Id: Id7f3a5109771f93d397e30febba36e09ddaf4f36

【背景】补充m核posix缺少接口。

【修改方案】
1. 添加stdin.c, __ctype_get_mb_cur_max.c

【影响】
对现有的产品编译不会有影响

re #
Signed-off-by: Nlanleinan <lanleinan@163.com>
Change-Id: I6f6864359d5cbe9a2465361bdabd7b4d45e03c8b