在 2025-5-14 18:46, Martin Storsjö 写道:
On Fri, 9 May 2025, Pali Rohár wrote:msvc has more object configuration files which are supposed to be passed to linker, and they change behavior of the startup code. Documentation:https://learn.microsoft.com/en-us/cpp/c-runtime-library/link-options In works in a way that every object file just initialize variable to some specific value. And all those variables are used by the startup code which is always linked. There are some "fallback" object files which are linked when symbols are not explicitly defined by specifying one of those above object configuration file, or by the application itself.
If this is the recommended setup for users, I think we should do the same, by providing 'threadlocale.o'. There are already similar objects such as 'binmode.o'.
If user programs do not link with 'threadlocale.obj', the default value seems to be zero?
For this __globallocalestatus variable. There is a threadlocale.obj file which sets the __globallocalestatus to -1 and hence activates the per-thread locale by default for all new spawned thread. In mingw-w64 we do not have an object file threadlocale.o and neither import library which could do similar thing. But applications are free to define that variable by their own and so enable per-thread locales globally. I agree that __globallocalestatus variable is somehow undocumented but it is available in header files as a public one.Can I have an opinion from LH and Jacek on this one? // Martin
-- Best regards, LIU Hao
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