Re: on how to install gnutls dlls on windows

[Wayne Harris]

Eli Zaretskii <eliz@gnu.org> writes:

>> Date: Sun, 18 Apr 2021 18:40:05 -0300
>> From: Wayne Harris via Users list for the GNU Emacs text editor
>> <help-gnu-emacs@gnu.org>
>> 
>> I didn't expect the PATH to be involved here, but here's how to get it
>> to work invoking it through cmd.exe:
>> 
>> C:\Users\x>cd \sys\emacs\bin
>> 
>> C:\sys\emacs\bin>set PATH=c:/sys/emacs/usr/mingw/mingw64/bin/
>> 
>> C:\sys\emacs\bin>echo %PATH%
>> c:/sys/emacs/usr/mingw/mingw64/bin/
>> 
>> C:\sys\emacs\bin>emacs -Q
>> 
>>   *scratch* buffer: (gnutls-available-p) C-x C-e
>>   Minibuffer says: (ClientHello\ Padding Key\ ...)
>>   C-x C-c
>
> This probably means some of the dependencies of the GnuTLS DLL were
> not copied, and are found via PATH.

You're quite right, sir.  Now I finally understood how to check such
dependencies --- for instance, the check is recursive.  I had tried
using the dependency walker before, but could never quite understand its
output.  Now I did.  I was missing

  LIBWINPTHREAD-1.DLL
  LIBGCC_S_SEH-1.DLL
  LIBGMP-10.DLL
  LIBINTL-8.DLL
  LIBP11-KIT-0.DLL
  LIBTASN1-6.DLL
  LIBIDN2-0.DLL
  LIBICONV-2.DLL
  LIBINTL-8.DLL
  LIBP11-KIT-0.DLL
  LIBFFI-7.DLL
  LIBTASN1-6.DLL
  LIBUNISTRING-2.DLL

and that was it.

If I may, I still have one question.  When I look at the dependencies of
emacs.exe, I don't see, for instance, LIBGNUTLS-30.DLL.  In fact, I only
see core Windows libraries.

--8<---------------cut here---------------start------------->8---
c:\windows\system32\ADVAPI32.DLL
c:\windows\winsxs\amd64_microsoft.windows.common-controls_6595b64144ccf1df_6.0.19041.1_none_b555e41d4684ddec\COMCTL32.DLL
c:\windows\system32\COMDLG32.DLL
c:\windows\system32\GDI32.DLL
c:\windows\system32\KERNEL32.DLL
c:\windows\system32\MPR.DLL
c:\windows\system32\MSVCRT.DLL
c:\windows\system32\OLE32.DLL
c:\windows\system32\SHELL32.DLL
c:\windows\system32\USER32.DLL
c:\windows\system32\USP10.DLL
c:\windows\system32\WINMM.DLL
c:\windows\system32\WINSPOOL.DRV
--8<---------------cut here---------------end--------------->8---

Doesn't emacs.exe depend on LIBGNUTLS-30.DLL?

>> I didn't know PATH was used to search for DLLs.
>
> Yes, it is.  You can find the description of the full DLL search
> method on the MS docs site.

I did find it.

  
https://docs.microsoft.com/en-us/windows/win32/dlls/dynamic-link-library-search-order

That was very educational.  Thank you.