You need to link to libpq as well (-lpq), so this line:
gcc -o testsql testsql.o -lm -lstdc++ -lpq++
should look like this:
gcc -o testsql testsql.o -lm -lstdc++ -lpq++ -lpq
Is this on the FAQ somewhere, because I've seen a couple of people asking
about this?
MikeA
>> -----Original Message-----
>> From: blackw@sfu.ca [mailto:blackw@sfu.ca]
>> Sent: Thursday, January 20, 2000 10:14 PM
>> To: pgsql-interfaces@postgreSQL.org
>> Subject: [INTERFACES] Linking problems
>>
>>
>> Hi,
>>
>> I seem to have a problem with my libpq++ library. I wrote a
>> QnD test program that simply connects and disconnects from
>> Postgres. When I compile it, I get the following error messages:
>>
>> --------------------
>> gcc -o testsql testsql.o -lm -lstdc++ -lpq++
>> /usr/lib/libpq++.so: undefined reference to
>> `clone__Q2t12basic_string3ZcZt18stri
>> ng_char_traits1ZcZt24__default_alloc_template2b1i03Rep'
>> /usr/lib/libpq++.so: undefined reference to
>> `__dl__Q2t12basic_string3ZcZt18strin
>> g_char_traits1ZcZt24__default_alloc_template2b1i03RepPv'
>> /usr/lib/libpq++.so: undefined reference to `__eh_pc'
>> collect2: ld returned 1 exit status
>> make: *** [testsql] Error 1
>> --------------------
>>
>> Here's the environment:
>> RH 6.1 (i386) (upgraded from 5.2)
>> egcs 1.1.2-24
>> libstdc++-2.9.0-24
>> postgresql-6.5.3-1.i386.rpm
>>
>> I am guessing that there may be some library mix-up going on
>> here, or I'm omitting a required library.
>>
>> Alternatively, should I be using the postgresql-6.5.2
>> release that comes with RH6.1? (I had installed 6.5.3-1
>> when I was running RH5.2.)
>>
>> Any insight would be appreciated. Thank-you in advance.
>>
>> Cheers,
>> Richard
>>
>>
>>
>> ************
>>
************