mon_gio: lstat overrides global lstat func from sys/stat.h [portability, musl]

[Jakub Jirutka]

mon_gio fails to compile on musl libc based system, because in the function gio_handle (mon_gio.c:319) you overrides global lstat function by a local variable.

POSIX standard defines only function lstat, not lstat64 – glibc extension. musl libc provides lstat64 for compatibility with glibc, but it’s declared using macro: #define lstat64 lstat.

[Dmitrii Okunev]

Well, it's a bug of musl, IMHO: variable name "lstat" is valid. However I changed the variable name.

Please try branch "musl". If doesn't work then please provide the compiler log.

[Andrew Savchenko]

Hmm, looks like under some unlikely conditions we may have lstat defined in glibc as well:
sys/stat.h:255

#if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K
# ifndef __USE_FILE_OFFSET64
/* Get file attributes about FILE and put them in BUF.
   If FILE is a symbolic link, do not follow it.  */
extern int lstat (const char *__restrict __file,
          struct stat *__restrict __buf) __THROW __nonnull ((1, 2));
# else
#  ifdef __REDIRECT_NTH
extern int __REDIRECT_NTH (lstat,
               (const char *__restrict __file,
                struct stat *__restrict __buf), lstat64)
     __nonnull ((1, 2));
#  else
#   define lstat lstat64
#  endif
# endif
# ifdef __USE_LARGEFILE64
extern int lstat64 (const char *__restrict __file,
            struct stat64 *__restrict __buf)
     __THROW __nonnull ((1, 2));
# endif
#endif

I'll try to build a musl Gentoo container in a week or so to see and test related issues.