_tzname not exported from latest snapshots?
Mumit Khan
khan@nanotech.wisc.edu
Fri Dec 31 13:28:00 GMT 1999
"Charles S. Wilson" <cwilson@ece.gatech.edu> writes:
>
> Doing an "nm libcygwin.a" shows the following:
>
> ...
> ds00422.o:
> 00000000 b .bss
> 00000000 d .data
> 00000000 ? .idata$4
> 00000000 ? .idata$5
> 00000000 ? .idata$6
> 00000000 ? .idata$7
> 00000000 t .text
> 00000000 ? ___imp__tzname
> U __head_temp_a
> 00000000 ? __imp___tzname
That's correct. The import library only contains the imported symbol,
and no thunk to avoid runtime crashes in favor of compile time
error. You must declare tzname as __attribute__((dllimport)) or
__declspec(dllimport), or else it won't link; without this safety
feature, your program will crash when reading or writing to tzname.
Here's the list of other variables:
h_errno DATA
__cygwin_environ DATA
_ctype_ DATA
_sys_errlist DATA
_sys_nerr DATA
__mb_cur_max DATA
_timezone DATA
_daylight DATA
_tzname DATA
To find the offender, grep for 'extern char *_tzname[2]' or something
like that. To find the object file:
$ nm --print-file-name *.o |grep _tzname
Regards,
Mumit
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