Re: Berkeley DB cannot be found on Ubuntu

[daniel s. <dan...@gm...>]

Oswald,

The command line in question refers to dynamically generated files
(conftest.c), so I cannot just type in the shell:

gcc -o conftest -g -O2 -pipe -W -Wall -Wshadow -Wstrict-prototypes -ansi
-pedantic -Wno-overlength-strings  -D_GNU_SOURCE  conftest.c -ldb

However, if you guide me in achieving this from within the toolchain, I'll
happily try it out.

On Tue, Jul 14, 2015 at 8:20 PM daniel szmulewicz <
dan...@gm...> wrote:

> It goes in the direction of my hypothesis.
>
>  nm -D /usr/lib/x86_64-linux-gnu/libdb.so | grep db_create
>
> 0000000000030f40 T __bam_db_create
> 00000000000fa7a0 T db_create
> 00000000000fa0d0 T __db_create_internal
> 0000000000054810 T __ham_db_create
> 000000000006c9a0 T __heap_db_create
> 0000000000075c40 T __qam_db_create
>
> Thank you, Oswald.
>
> On Tue, Jul 14, 2015 at 7:47 PM Oswald Buddenhagen <
> osw...@gm...> wrote:
>
>> On Mon, Jul 13, 2015 at 11:27:09PM +0000, daniel szmulewicz wrote:
>> > The config.log reveals:
>> >
>> > configure:4723: checking for Berkeley DB >= 4.1
>> > configure:4745: gcc -o conftest -g -O2 -pipe -W -Wall -Wshadow
>> > -Wstrict-prototypes -ansi -pedantic -Wno-overlength-strings
>> -D_GNU_SOURCE
>> >      -ldb conftest.c  >&5
>> > conftest.c:34:1: warning: function declaration isn't a prototype
>> > [-Wstrict-prototypes]
>> >  main ()
>> >  ^
>> > /tmp/ccaGDsAw.o: In function `main':
>> > /home/daniel/isync-isync/conftest.c:37: undefined reference to
>> `db_create'
>> > collect2: error: ld returned 1 exit status
>> >
>> > So the linker cannot find the required function. Interesting.
>> >
>> > If I had to guess, which I really shouldn't because I'm not a C
>> programmer
>> > at all, the problem is that recent versions of gcc require that you put
>> the
>> > object files and libraries in the order that they depend on each other.
>> In
>> > other words, conftest.c should be before -ldb. This is actually
>> consistent
>> > from what I observe elsewhere in the log, for example conftest.c
>> precedes
>> > -lsasl2, etc.
>> >
>> what happens if you use that command line with switched argument order
>> to compile the test program manually? that's a rather easy test for your
>> hypothesis.
>>
>> what does
>>
>>   nm -D <whereever your libdb.so is> | grep db_create
>>
>> produce?
>>
>>
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>