1.7.8: undefined reference to __xpg_strerror_r

[Hughes, Gregory Mark (PSG Consumer Experience)]

Hi,

After updating to Cygwin 1.7.8-1, I am seeing an unresolved reference to 
__xpg_strerror_r 

This test program links successfully if I define _GNU_SOURCE to so select the 
alternate strerror_r entrypoint.

Compile with "gcc test.c":

#include <errno.h>
#include <string.h>

int main()
{
    char err_buf[256];
    strerror_r(errno, err_buf, sizeof(err_buf));
}

It appears the leading double underscore has been added to the symbol twice, I 
see an ____xpg_strerror_r in libcygwin.a.  

$ nm /lib/libcygwin.a | grep __xpg_strerror_r
00000000 I __imp____xpg_strerror_r
00000000 T ___xpg_strerror_r
         U __imp____xpg_strerror_r

Regards,
Greg.


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