【模块名_概率】简要描述：
drivers/framework/tools/hdi-gen 模块代码在 VMware® Workstation 16 Player（16.2.1 build-18811642）+ ubuntu-21.10-desktop-amd64 环境下编译异常。

【环境信息】:

• 网络环境【不需要】
• 硬件开发板型号【HI3516DV300、DAYU200】
• 软件版本信息或tag节点【3.1 Release 或 Master】
• 测试环境
• 其他

VMware® Workstation 16 Player（16.2.1 build-18811642）+ ubuntu-21.10 -desktop-amd64 ，按官方指导给出的步骤配置好编译环境后，拉取一个干净的最新的3.1 Release代码回来【master分支代码也一样】，不做任何修改直接编译RK3568项目。

编译过程会出现大量的（过百条）如下异常：

Line 351: /home/ohos/Ohos/A_LTS31/drivers/framework/tools/hdi-gen/util/string.h:23:32: error: ‘size_t’ has not been declared
......
Line 365: /home/ohos/Ohos/A_LTS31/drivers/framework/tools/hdi-gen/ast/ast_namespace.h:36:40: error: ‘size_t’ has not been declared
......
Line 392: /home/ohos/Ohos/A_LTS31/drivers/framework/tools/hdi-gen/util/string_builder.h:31:15: error: ‘size_t’ has not been declared
......
/home/ohos/Ohos/A_LTS31/drivers/framework/tools/hdi-gen/util/string_builder.cpp:27:9: error: ‘position_’ was not declared in this scope
27 | if (position_ + 1 >= capacity_) {
| ^~~~~~~~~
/home/ohos/Ohos/A_LTS31/drivers/framework/tools/hdi-gen/util/string_builder.cpp:27:26: error: ‘capacity_’ was not declared in this scope
27 | if (position_ + 1 >= capacity_) {
| ^~~~~~~~~
/home/ohos/Ohos/A_LTS31/drivers/framework/tools/hdi-gen/util/string_builder.cpp:33:13: error: ‘position_’ was not declared in this scope
33 | buffer_[position_] = c;
| ^~~~~~~~~

以及如下异常：

/home/ohos/Ohos/A_LTS31/drivers/framework/tools/hdi-gen/codegen/java_code_emitter.cpp:38:27: error: ‘islower’ was not declared in this scope
38 | if (name.IsEmpty() || islower(name[0])) {
| ^~~~~~~
/home/ohos/Ohos/A_LTS31/drivers/framework/tools/hdi-gen/codegen/java_code_emitter.cpp:41:35: error: ‘tolower’ was not declared in this scope
41 | return String::Format("%c%s", tolower(name[0]), name.Substring(1).string());
| ^~~~~~~

我在 //drivers/framework/tools/hdi-gen/util/string.h 文件头部增加一句：
#include <stdlib.h>
在//drivers/framework/tools/hdi-gen/codegen/java_code_emitter.h 文件头部增加一句：
#include <ctype.h>
可以解决上述异常，就能够成功编译。

疑似ubuntu-21.10 -desktop-amd64下的编译环境还有点问题，请相关工程师抽空看一下可能是哪里出现了问题，谢谢。