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From: Michael S <already5chosen@yahoo.com>
Newsgroups: comp.lang.c
Subject: Re: tcc - first impression. Was: Baby X is bor nagain
Date: Tue, 2 Jul 2024 17:55:59 +0300
Organization: A noiseless patient Spider
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Message-ID: <20240702175559.00002a23@yahoo.com>
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On Tue, 2 Jul 2024 15:18:10 +0100
bart <bc@freeuk.com> wrote:

> On 02/07/2024 14:27, Michael S wrote:
> > On Tue, 2 Jul 2024 12:22:53 +0100
> > bart <bc@freeuk.com> wrote:  
> >>
> >> Both make use of msvcrt.dll. I don't consider it a dependency since
> >> it has always been part of Windows. (I first starting using it in
> >> 1990s, from my other language, before I knew much about C, as it
> >> had a simpler file API than Windows.)
> >>
> >> Lots of other applications use it too. Including older gcc binaries
> >> and applications compiled with those.
> >>
> >> On Windows 11, probably 10 too, msvcrt.dll's printf routines
> >> support %zu, and so does Tcc.
> >>  
> > 
> > Not really.
> > DLL that supports newer feature has different name -
> > VCRUNTIME140.dll And choice of DLL version is not directly related
> > to the version of Windows.  
> Well, both tcc and mcc (my product) import msvcrt, not that runtime 
> file, and printf/zu works.
> 
> You can test it directly using the program below if you like.
> 
> If you think that the OS craftily substitutues vcruntime140.dll in
> place of msvcrt.dll, then copy "c:\windows\system32\msvcrt.dll" to
> "fred.dll", to a folder where it can be found. Then change "msvcrt"
> beflow to "fred".
> 
> If %zu it doesn't work, then maybe your copy is old.
> 
> ---------------------------
> #include <windows.h>
> #include <stdlib.h>
> 
> int main(void) {
>      int (*PRINTF)(const char*, ...);
>      HINSTANCE libinst;
> 
>      libinst=LoadLibrary("msvcrt");
>      if (libinst==NULL) exit(1);
> 
>      PRINTF=GetProcAddress(libinst, "printf");
>      if (PRINTF==NULL) exit(1);
> 
>      PRINTF("sizeof void* = %zu\n", sizeof(void*));
> }
> ---------------------------
> 

I am not logged into Win10/11 right now, so tried on Ws2016 witch is
mostly the same as early Win10. It didn't work.
Then I went and tested on Ws2019 which is similar to midlife Windows 10.
It works.
I didn't [yet] try to mess with DLLs in system folder but I looked at
versions.
on Ws2016 - 7.0.14393.2457
on Ws2019 - 7.0.17763.475