ugo.matrangolo

Hi,

I'm a Berkeley-DB newbie (tried this morning).

I tried the c version of the berkeley-db software with success but i
cannot compile the same c++ version of the c code.

I tried to compile the examples in the example_cxx dir of the bdb
distribution but i get the same strange errors.

In the above dir, when i do a :
matra@nyx:~/software/berkeleydb/db-4.2.52.NC/examples_cxx> g++
-I/usr/local/BerkeleyDB.4.2/include Acces***ample.cpp

i get :
In file included from /usr/include/g++/backward/iostream.h:31,
from /usr/local/BerkeleyDB.4.2/include/db_cxx.h:59,
from Acces***ample.cpp:27:
/usr/include/g++/backward/backward_warning.h:32:2: warning: #warning
This file includes at least one deprecated or antiquated header.
Please consider using one of the 32 headers found in section 17.4.1.2
of the C++ standard. Examples include substituting the <X> header for
the <X.h> header for C++ includes, or <sstream> instead of the
deprecated header <strstream.h>. To disable this warning use
-Wno-deprecated.
/tmp/ccZrcaAb.o(.text+0x1cf): In function `Acces***ample::run(bool,
char const*)':
: undefined reference to `Db:b[in-charge](DbEnv*, unsigned)'
/tmp/ccZrcaAb.o(.text+0x1e3): In function `Acces***ample::run(bool,
char const*)':
: undefined reference to
`Db::set_error_stream(std::basic_ostream<char, std::char_traits<char>

/tmp/ccZrcaAb.o(.text+0x1f7): In function `Acces***ample::run(bool,
char const*)':
: undefined reference to `Db::set_errpfx(char const*)'
/tmp/ccZrcaAb.o(.text+0x20b): In function `Acces***ample::run(bool,
char const*)':
: undefined reference to `Db::set_pagesize(unsigned)'
/tmp/ccZrcaAb.o(.text+0x220): In function `Acces***ample::run(bool,
char const*)':
: undefined reference to `Db::set_cachesize(unsigned, unsigned, int)'
/tmp/ccZrcaAb.o(.text+0x23f): In function `Acces***ample::run(bool,
char const*)':
: undefined reference to `Db:pen(DbTxn*, char const*, char const*,
DBTYPE, unsigned, int)'
/tmp/ccZrcaAb.o(.text+0x342): In function `Acces***ample::run(bool,
char const*)':
: u ... and so on!

I cannot understand the "[in-charge]" string!

Please help me!

Thank you in advance for any reply.

Bye!

mjc

Hi Ugo,

My name is Michael Cahill from Sleepycat Software.


The main problem here is that you are telling g++ to compile and link
an application, but you aren't including the Berkeley DB C++ library
for the link. Something like this should work better:

g++ -c -I/usr/local/BerkeleyDB.4.2/include Acces***ample.cpp
g++ -o Acces***ample Acces***ample.o \
-L/usr/local/BerkeleyDB4.2 -ldb_cxx-4.2

Alternatively, you can build this using our Makefile, with this
command in the build directory:
make excxx_access


This warning is odd -- with g++, you should see the line "#define
HAVE_CXX_STDHEADERS 1" in db_cxx.h, so <iostream> should be included
rather than <iostream.h>. Is it possible that you configured with a
different compiler, or a different version of g++? (In particular, is
the "c++" command the same as "g++" on your system?)


This and all following messages are just a symptom of the missing
library.

Regards,
Michael.