fixes #18146; fixes #19372; disable tlsEmulation on windows; static link pthreads with mingw

[ringabout]

fixes #18146
fixes #19372

[ringabout]

I tested it by deleting libwinthreads.dll. I assume it's the only dep that is affected when disabling tlsemulation.

[github-actions]

Thanks for your hard work on this PR!
The lines below are statistics of the Nim compiler built from 512517c

Hint: mm: orc; opt: speed; options: -d:release
166804 lines; 8.917s; 612.586MiB peakmem

[rockcavera]

I tested it by deleting libwinthreads.dll. I assume it's the only dep that is affected when disabling tlsemulation.

@ringabout I tested it here, after this PR, but it keeps dynamically linking pthread. Tested with the gcc compilers provided by Nim.

How did I test and verify that I needed "libwinpthread-1.dll"? Steps to reproduce:

• 1: open Windows cmd
• 2: nim c some_nim_code
• 3: set PATH=""
• 4: some_nim_code

When trying to run it will give an error saying that it needs "libwinpthread-1.dll".

[ringabout]

Looking into it

[ringabout]

It seems that apart from the direct use of libpthread, there is another shared dll using libwinpthread since {.passl: "-Wl,-Bstatic -lpthread".} works.

[rockcavera]

It seems that apart from the direct use of libpthread, there is another shared dll using libwinpthread since {.passl: "-Wl,-Bstatic -lpthread".} works.

Yes, it works. That's how I was able to link statically. I'm just not sure it will force static link to all the other -lLibs passed as well. Perhaps a way to add -Wl,-Bstatic -lpthread as the last link parameter on Windows?

[ringabout]

Here is the link parameter

-Bstatic -lpthread -Bdynamic -lmingw32 -lgcc -lgcc_eh -lmoldname -lmingwex -lmsvcrt -lkernel32 -lpthread -ladvapi32 -lshell32 -luser32 -lkernel32 -lmingw32 -lgcc -lgcc_eh -lmoldname -lmingwex -lmsvcrt -lkernel32 c:/users/blue/desktop/exe/mingw64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/11.1.0/crtend.o

It seems that -lpthread will be passed twice so the first one is canceled.

[ringabout]

It seems that if -Bstatic -lpthread is added in config, it will be appended after user configs.