MacOS incompatibility

[tieugene]

macOS has no mremap() (tkrzw_file_mmap.cc). And MREMAP_MAYMOVE not defined in it. PS. seems Windows ™ has no mremap() too

[estraier]

I committed the change to emulate mremap on non-Linux environments. For Windows, I'll have to replace the whole file (tkrzw_file_mmap.cc) using Win32 API like CreateFile and CreateFileMapping, as I did for Kyoto Cabinet.

[tieugene]

I cannot check it on Windows host but macOS built ok (with some warnings). build.log.gz

[tieugene]

Another issue - I have to exclude -D_POSIX_C_SOURCE=200809L during compilation on macOS host:

tkrzw_str_util.cc:507:10: error: use of undeclared identifier 'memmem'
  return memmem(text.data(), text.size(), pattern.data(), pattern.size()) != nullptr;
         ^
tkrzw_str_util.cc:598:7: error: use of undeclared identifier 'memmem'
      memmem(text.data(), text.size(), pattern.data(), pattern.size());
      ^
2 errors generated.

This is because of:

string.h:

#if __DARWIN_C_LEVEL >= __DARWIN_C_FULL
...
void *memmem()

cdefs.h:

#define __DARWIN_C_ANSI         010000L
#define __DARWIN_C_FULL         900000L
...
#if   defined(_ANSI_SOURCE)
#define __DARWIN_C_LEVEL        __DARWIN_C_ANSI
#elif defined(_POSIX_C_SOURCE) && !defined(_DARWIN_C_SOURCE) && !defined(_NONSTD_SOURCE)
#define __DARWIN_C_LEVEL        _POSIX_C_SOURCE
#else
#define __DARWIN_C_LEVEL        __DARWIN_C_FULL
#endif

After solving the equition:

__DARWIN_C_LEVEL = 200809L # == _POSIX_C_SOURCE
__DARWIN_C_FULL  = 900000L
__DARWIN_C_LEVEL < __DARWIN_C_FULL

[estraier]

Thanks. I committed the change to suppress the warnings and the error.

As for _POSIX_C_SOURCE, they say "Greater values for _POSIX_C_SOURCE will enable future extensions." So, I set it 999999L for easy maintenance. https://www.gnu.org/software/libc/manual/html_node/Feature-Test-Macros.html

[tieugene]

Thanks. I committed the change to suppress the warnings and the error.

It works, thank you. Build quiet on macOS 10.5.