AIX xlc gets confused by logic in stdio.h

[Ralf Wildenhues]

I'm seeing this on AIX 5.3:

        /tmp/gl/build-aux/compile cc -qlanglvl=extc89 -qlanglvl=extc99  -g   -o 
test-select test-select.o ../gllib/libgnu.a   -lm  
ld: 0711-317 ERROR: Undefined symbol: .__printf__
ld: 0711-345 Use the -bloadmap or -bnoquiet option to obtain more information.

I can only guess the relevant parts of the generated stdio.h are:

#if 1
# if 1
#  define fprintf rpl_fprintf
extern int fprintf (FILE *fp, const char *format, ...)
       __attribute__ ((__format__ (__printf__, 2, 3)))
       _GL_ARG_NONNULL ((1, 2));
# endif
#elif 1 && 0 && 1
# define fprintf rpl_fprintf
extern int fprintf (FILE *fp, const char *format, ...)
       __attribute__ ((__format__ (__printf__, 2, 3)))
       _GL_ARG_NONNULL ((1, 2));
#elif defined GNULIB_POSIXCHECK
# undef fprintf
# define fprintf \
[...]

#if 1
# if 1
/* Don't break __attribute__((format(printf,M,N))).  */
#  define printf __printf__
extern int printf (const char *format, ...)
       __attribute__ ((__format__ (__printf__, 1, 2))) _GL_ARG_NONNULL ((1));
# endif
#elif 1 && 0 && 1
/* Don't break __attribute__((format(printf,M,N))).  */
# define printf __printf__
extern int printf (const char *format, ...)
       __attribute__ ((__format__ (__printf__, 1, 2))) _GL_ARG_NONNULL ((1));
#elif defined GNULIB_POSIXCHECK
# undef printf
# define printf \
    (GL_LINK_WARNING ("printf is not always POSIX compliant - " \


but test-select.c must somehow play a role here too, otherwise other
tests would have failed, too.

Thanks,
Ralf