From: arne@vajhoej.dk   
      
   On 9/7/2025 11:03 AM, Waldek Hebisch wrote:   
   > As I wrote I am trying to compile gcc-15 cross-compiler targeting   
   > VMS.  I now have trouble with libgfortran.  Namely libgfortran   
   > tries to use Posix compatiblity to perform some file operations.   
   > I have trouble with st_ino filed in 'struct stat'.  Code below   
   > ilustrates the problem.  I am getting warning from VMS C compiler:   
   >   
   >      mp->st_ino = sb.st_ino;   
   > ....^   
   > %CC-W-CVTDIFTYPES, In this statement, "sb.st_ino" of type "pointer to   
   unsigned s   
   > hort", is being converted to "unsigned short".   
   >   
   >   
   >      mp->st_ino = sb.st_ino;   
   > .................^   
   > %CC-W-MAYLOSEDATA, In this statement, "sb.st_ino" has a larger data size   
   than "u   
   > nsigned short".  Assignment can result in data loss.   
   >   
   > While this is only a warning in VMS C, such thing may indicate serious   
   > problem.  Also, I tried to print 'sizeof(sb.st_ino)' and   
   > 'sizeof(unsigned short *)'.  The results are 6 and 4 respecitvely.   
   > So size of type reported above does not match with size of 'sb.st_ino'.   
      
   > #include    
   > typedef struct   
   > {   
   >    /* Cached stat(2) values.  */   
   >    dev_t st_dev;   
   >    ino_t st_ino;   
   >    long long file_size;   
   > }   
   > my_sb;   
   >   
   > int   
   > my_stat(const char * name, my_sb * mp) {   
   >      struct stat sb;   
   >      int res = stat(name, &sb);   
   >      mp->st_dev = sb.st_dev;   
   >      mp->st_ino = sb.st_ino;   
   >      mp->file_size = sb.st_size;   
   >      return res;   
   > }   
      
   A VMS FID is 3 words, so 6 bytes seems right.   
      
   stat.h is a nightmare of #ifdef's.   
      
   I can see 2 approaches worth investigating.   
      
   A)   
      
   Change my_sb to:   
      
   __ino16_t st_ino[3];   
      
   and handle the array.   
      
   B)   
      
   Compile with:   
      
   /def="_USE_STD_STAT"   
      
   (then it looks like your code compiles)   
      
   I have no idea if any of them will work in the bigger context.   
      
   Arne   
      
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