Re: solaris libpq threaded build fails

Andrew Chernow wrote:
> Bruce Momjian wrote:
>> I supposed Solaris 2.5.1 (release 1996) is just too old to add
>> threading, and this code has been unchanged for years.
>>
> 
> Yeah, its old.  Unfortunately for us, we still have to support it.
> 
> To set the record straight, the issue is not threads.  Threads work fine 
> on 2.5.1.  This is a configure system linking issue, "gethostbyname" 
> requires linking with libnsl.so.  So, thread_test.c must link with -lnsl.
> 
> The bigger issue is that the configure script needs to include -lnsl for 
> older solaris platforms.  Solaris 2.5.1 has "gethostbyname_r" but the 
> configure check fails for the same reason.
> 
> configure:19821: checking for gethostbyname_r
> configure:19877: gcc -o conftest -O2 -Wall [...snip...]
> Undefined     first referenced
>  symbol           in file
> gethostbyname_r                     /var/tmp//ccSuGLEn.o  (symbol 
> belongs to implicit dependency /usr/lib/libnsl.so.1)
> ld: fatal: Symbol referencing errors. No output written to conftest
> collect2: ld returned 1 exit status
> 
> This is why thread_test.c thought it had to fall back on gethostbyname 
> in the first place.
> 

Forgot to mention, there is an easy fix:

~]# LDFLAGS="-lnsl" ./configure --enable-thread-safety

-- 
Andrew Chernow
eSilo, LLC
every bit counts
http://www.esilo.com/