crossmingw32-gcc-lfs.patch

   1 --- gcc-7.5.0/libstdc++-v3/config/io/basic_file_stdio.cc.orig   2017-08-14 14:14:09.143001000 +0200
   2 +++ gcc-7.5.0/libstdc++-v3/config/io/basic_file_stdio.cc        2019-12-25 20:03:25.172581834 +0100
   3 @@ -236,7 +236,7 @@
   4      const char* __c_mode = fopen_mode(__mode);
   5      if (__c_mode && !this->is_open())
   6        {
   7 -#ifdef _GLIBCXX_USE_LFS
   8 +#if defined(_GLIBCXX_USE_LFS) || defined(__MINGW32__)
   9         if ((_M_cfile = fopen64(__name, __c_mode)))
  10  #else
  11         if ((_M_cfile = fopen(__name, __c_mode)))
  12 @@ -311,7 +311,7 @@
  13    streamoff
  14    __basic_file<char>::seekoff(streamoff __off, ios_base::seekdir __way) throw ()
  15    {
  16 -#ifdef _GLIBCXX_USE_LFS
  17 +#if defined(_GLIBCXX_USE_LFS) || defined(__MINGW32__)
  18      return lseek64(this->fd(), __off, __way);
  19  #else
  20      if (__off > numeric_limits<off_t>::max()
  21 @@ -355,6 +355,15 @@
  22      if (!__err && _GLIBCXX_ISREG(__buffer.st_mode))
  23        {
  24         const streamoff __off = __buffer.st_size - lseek64(this->fd(), 0,
  25 +                                                          ios_base::cur);
  26 +       return std::min(__off, streamoff(numeric_limits<streamsize>::max()));
  27 +      }
  28 +#elif defined(__MINGW32__)
  29 +    struct _stati64 __buffer;
  30 +    const int __err = _fstati64(this->fd(), &__buffer);
  31 +    if (!__err && _GLIBCXX_ISREG(__buffer.st_mode))
  32 +      {
  33 +       const streamoff __off = __buffer.st_size - lseek64(this->fd(), 0,
  34                                                            ios_base::cur);
  35         return std::min(__off, streamoff(numeric_limits<streamsize>::max()));
  36        }
  37 diff -r faddb1a6e933 libstdc++-v3/include/ext/stdio_sync_filebuf.h
  38 --- a/libstdc++-v3/include/ext/stdio_sync_filebuf.h     Fri Jul 31 08:58:42 2009 -0600
  39 +++ b/libstdc++-v3/include/ext/stdio_sync_filebuf.h     Fri Jul 31 13:09:27 2009 -0600
  40 @@ -163,7 +163,7 @@
  41           __whence = SEEK_CUR;
  42         else
  43           __whence = SEEK_END;
  44 -#ifdef _GLIBCXX_USE_LFS
  45 +#if defined(_GLIBCXX_USE_LFS) || defined(__MINGW32__)
  46         if (!fseeko64(_M_file, __off, __whence))
  47           __ret = std::streampos(ftello64(_M_file));
  48  #else