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|    comp.os.vms    |    DEC's VAX* line of computers & VMS.    |    264,096 messages    |
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|    Message 263,344 of 264,096    |
|    Waldek Hebisch to mw40171@mucweb.de    |
|    Re: Unix stat on VMS    |
|    16 Sep 25 19:24:56    |
   
   From: antispam@fricas.org   
      
   hb0815 wrote:   
   > On 9/10/25 16:13, Waldek Hebisch wrote:   
   >   
   >> By default GNU ld also wants to use 'starlet.olb' and   
   >> 'sys$public_vectors'. I do not know if 'starlet.olb' is a "shared   
   >> image library" or just static library. IIUC 'sys$public_vectors'   
   >> is a sharable image. So at least programs that do not use   
   >> 'starlet.olb' should work after linking with fake shareable   
   >> images. And I think that this includes a lot of code.   
   >   
   > starlet.olb is an OBJECT library.   
   >   
   > You can fake the shareable image. You only need to have the very same   
   > symbol vector entries in the faked image as in the real one. That   
   > includes all the alias entries as well has spare and private entries.   
   > And you need to have the identical GSMATCH.   
   >   
   > If someone links /system you also need a SYS$BASE_IMAGE.EXE. A faked one   
   > should do, but I admit I never tried that.   
      
   I have made a simple-minded generator of fake shared libraries.   
   Using fake 'DECC$SHR.exe' containing just 5 real symbols (and   
   hundreds of dummies to fill unused positions in symbol vector)   
   I managed to link on Linux a simple "Hello from VMS" program   
   and the program run correctly on VMS.   
      
   I still have a problem: ATM I do not know how access to variables in   
   shared images works. So I have bogus reference to 'C$_EXIT1'.   
      
   I have noticed that VMS linker inserts reference to 'LIB$INITIALIZE',   
   while with my fake libraries GNU linker does not reference this   
   function.   
      
   --   
    Waldek Hebisch   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   
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