Re: Cannot build StreamDevice on Windows 64bit

[Ralph Lange via Tech-talk <tech-talk at aps.anl.gov>]

Hi Johannes,

On Thu, 9 Sept 2021 at 14:02, Lehmeyer, Johannes via Tech-talk <tech-talk at aps.anl.gov> wrote:

 

C:/msys64/mingw64/x86_64-w64-mingw32/include/string.h:113:15: error: conflicting declaration of 'int strncasecmp(const char*, const char*, size_t)' with 'C' linkage

  113 |   int __cdecl strncasecmp (const char *, const char *, size_t);

      |               ^~~~~~~~~~~

../ChecksumConverter.cc:50:12: note: previous declaration with 'C++' linkage

   50 | static int strncasecmp(const char *s1, const char *s2, size_t n)

      |            ^~~~~~~~~~~

In file included from ../StreamBuffer.h:26,

                 from ../StreamFormatConverter.h:27,

                 from ../ChecksumConverter.cc:58:

C:/msys64/mingw64/x86_64-w64-mingw32/include/string.h:116:28: error: redefinition of 'int strncasecmp(const char*, const char*, size_t)'

  116 |   __CRT_INLINE int __cdecl strncasecmp (const char *__sz1, const char *__sz2, size_t __sizeMaxCompare) { return _strnicmp (__sz1, __sz2, __sizeMaxCompare); }

      |                            ^~~~~~~~~~~

../ChecksumConverter.cc:50:12: note: 'int strncasecmp(const char*, const char*, size_t)' previously defined here

   50 | static int strncasecmp(const char *s1, const char *s2, size_t n)

      |            ^~~~~~~~~~~

If you look at that place, there's a hint:

#if defined(vxWorks) || defined(_WIN32) || defined(__rtems__)

// These systems have no strncasecmp

static int strncasecmp(const char *s1, const char *s2, size_t n)

Windows does not have str[n]casecmp(), so Stream provides an implementation.

MSYS2 does have it, so you need to fix the preprocessor #if to not provide the function under MSYS2.

Don't forget to offer your fix upstream as a PullRequest.

Cheers,
~Ralph