问题整理 [已解决] - Debian10 下编译 OpenJDK-8 源码 - [-Wdeprecated-declarations]

Warning: ××× ‘int readdir_r(DIR*, dirent*, dirent**)’ is deprecated (declared at /usr/include/dirent.h:183) [-Wdeprecated-declarations] ×××

具体警告提示：

/mnt/Data/AppsData/Repository/java/jdk/8/hotspot/src/os/linux/vm/os_linux.inline.hpp: In static member function ‘static dirent* os::readdir(DIR*, dirent*)’:
/mnt/Data/AppsData/Repository/java/jdk/8/hotspot/src/os/linux/vm/os_linux.inline.hpp:127:18: warning: ‘int readdir_r(DIR*, dirent*, dirent**)’ is deprecated (declared at /usr/include/dirent.h:183) [-Wdeprecated-declarations]
if((status = ::readdir_r(dirp, dbuf, &p)) != 0) {
                ^

分析原因:
1. gcc 编译环境中开启了相关警告提示

解决方案：
1. 查看./hotspot/make/[you_os]/makefiles/gcc.make文件

在./hotspot/make/linux/makefiles/gcc.make文件中找到

WARNINGS_ARE_ERRORS = -Werror

将其 注释 或改为

WARNINGS_ARE_ERRORS = -Wno-all

类似的警告都可以通过以下参数来设置，在该文件下找到WARNING_FLAGS，就在上述变量附近，添加需要注释的警告

WARNING_FLAGS = -Wno-deprecated-declarations -Wno-unused-parameter -Wno-sign-compare -Wno-error

或者关闭所有警告

WARNING_FLAGS = -w

不过貌似只对编译hotspot时有用